U.S. patent number RE30,821 [Application Number 05/846,358] was granted by the patent office on 1981-12-08 for customer service unit.
This patent grant is currently assigned to Telecredit, Inc.. Invention is credited to Robert N. Goldman.
United States Patent |
RE30,821 |
Goldman |
December 8, 1981 |
Customer service unit
Abstract
A status-indicating system is disclosed, directed specifically
to provide information for regulating credit transactions and the
like. An inquiry station includes structure for providing signals
that identify a subject and also indicate whether or not the
contemplated transaction suggests caution, e.g., cash will be
returned on a check. The inquiry signals are transmitted to a
primary register which has a location assigned for each subject and
which locations record first signals (indicating that the subject
is or is not authorized) and second signals (indicating the subject
is or is not in question). The questionable status results from a
relatively recent inquiry by a subject which involved a transaction
of the type suggesting caution. Thus, such transactions result in
the recording of the second signals, in the primary register. The
system incorporates structure for selectively cancelling the first
and second signals from the register as well as for eliminating all
the second signals (as at the close of a business day or other
period). As disclosed, the register is a cyclic magnetic memory.
.Iadd.
Inventors: |
Goldman; Robert N. (Kailua,
HI) |
Assignee: |
Telecredit, Inc. (Los Angeles,
CA)
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Family
ID: |
27379351 |
Appl.
No.: |
05/846,358 |
Filed: |
October 28, 1977 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
Issue Date |
|
|
102486 |
Apr 12, 1961 |
3212062 |
|
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Reissue of: |
494384 |
Oct 11, 1965 |
03407388 |
Oct 22, 1968 |
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Current U.S.
Class: |
340/5.4;
235/380 |
Current CPC
Class: |
G06Q
20/403 (20130101); G07C 9/257 (20200101); G06Q
20/042 (20130101); G07F 7/08 (20130101); G06Q
20/04 (20130101) |
Current International
Class: |
G06Q
20/00 (20060101); G07F 7/08 (20060101); G07C
9/00 (20060101); H04Q 009/00 () |
Field of
Search: |
;340/149R,149A,152
;235/380 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Yusko; Donald J.
Attorney, Agent or Firm: Nilsson, Robbins, Dalgarn,
Berliner, Carson & Wurst
Parent Case Text
The present application is a reissue application of U.S. Patent
3,407,388 which is in turn a continuation-in-part of Ser. No.
102,486 filed Apr. 12, 1961, now U.S. Patent 3,212,062. .Iaddend.
Claims
What is claimed is:
1. A system for registering status for a multiplicity of subjects
identified as by numerical designations, and for indicating a
subjects status at any of a plurality of remote stations on
command, comprising:
a central processing unit including a status register for
registering status signals to manifest the status of each of said
subjects, said status register including a first recording path and
a second recording path, said first path for recording permanent
status signals and said second path for recording temporary status
signals;
means for sensing said status signals from said status
register;
means for recording said temporary status signals in said second
path upon the occurrence of designation signals addressing a
designation thereon;
address register means to address said status register with
designation signals, representative of a subject's designation to
locate the status signals for a designated subject;
means at each of said remote stations to form designation signals
representative of a subjects designation and temporary status
signals for a subject;
means at each of said remote stations to manifest a subjects status
under control of said status signals;
transfer means to transfer designation signals from each of said
remote stations to said address register and to transfer status
signals from said status register to each of said means to manifest
a subjects status;
and control mean for controlling said transfer means to receive
designation signals from a single remote station pending return of
status signals to said single remote station.
2. A system according to claim 1 wherein said status register
comprises at least two circular magnetic paths and means for
sensing the contents of spaces in said paths under control of said
address register to provide status signals.
3. A control system for accounting status of a plurality of
subjects each of which is identified as by a numerical designation,
comprising:
means for forming electrical signals indicative of the numerical
designation for a subject;
register means having locations for registering a first information
signal indicative of unacceptable status and a second information
signal indicative of a questionable status for each of said
numerical designations;
means for transmitting said electrical signals indicative of a
numerical designation to said register means;
means for providing information signals from said register means
from a location therein identified by received electrical signals
indicative of a numerical designation;
means for manifesting said information signals; and
means for recording a second information signal in a location
identified by a numerical designation upon the provision of said
information signals by said means for providing information
signals. .[.4. A system for providing a status report on subjects
identified by numerical designations pursuant to various
transactions comprising:
means for forming electrical inquiry signals indicative of the
numerical designations for a subject;
means for forming electrical inquiry signals indicative of a
transaction suggesting caution;
status register means having locations for registering first status
signals and second status signals for said numerical
designations;
means for transmitting said electrical inquiry signals to said
register means;
means for providing status signals from one location in said status
register identified by said received electrical inquiry signals
indicative of the numerical designation for a subject;
means for manifesting said status signals from said status register
in response to said inquiry signals; and
means for recording said electrical inquiry signals indicative of a
transaction suggesting caution, as second status signals in said
one location identified by said received electrical inquiry signals
indicative
of the numerical designation for a subject..]. 5. A system
according to claim .[.4.]. .Iadd.3 .Iaddend.wherein said means for
manifesting said .[.status.]. .Iadd.information .Iaddend.signals
comprise:
a first lamp for indicating approval; a second lamp for indicating
disapproval and controlled by said first .[.status.].
.Iadd.information .Iaddend.signals; and a third lamp indicating
caution, and contolled by
said second .[.status.]. .Iadd.information .Iaddend.signals. 6. A
system according to claim .[.4.]. .Iadd.3 .Iaddend.further
including means for selectively clearing all of said second
.[.status.]. .Iadd.information .Iaddend.signals recorded in said
.[.status.]. register .Iadd.means.Iaddend.. .[.7. A system
according to claim 4 wherein said register means comprises a
plurality of circular recording paths and wherein said means for
providing status signals from one location in said status register
includes means to scan said recording paths during a first cycle,
and said means for recording said second status signals includes
means to scan said recording paths during a second cycle..]. .[.8.
A system according to claim 7 wherein said circular recording paths
comprise paths of magnetic recording medium..]. .[.9. A system
according to claim 8 further including means for selectively
clearing all of said second status signals recorded in said status
register..]. .[.10. A system according to claim 9 wherein said
means for manifesting said status signals comprise: a first lamp
for indicating approval; a second lamp for indicating disapproval
and controlled by said first status signals; and a third lamp
indicating caution, and controlled by said second status
signals..]. 11. A system according to claim .[.4.]. .Iadd.3
.Iaddend.further including means for selectively clearing said
second .[.status.]. signals from select locations of said
.[.status.]. register .Iadd.means.Iaddend..
Description
The present invention relates to a data-processing or
information-handling system, and particularly to a system for
providing a status report on subjects bearing assigned
identification or designation numbers.
Commercial transactions as practiced at the present time involve
the widespread use of customer credit and bank checks. Over the
years, delayed payment arrangements and payment by bank check have
presented a considerable problem to retail business establishments
as well as various other commercial houses. That is, in view of the
widespread practice of making purchases on account and the
similarly widespread practice of paying for purchases by bank
check, retail merchants are repeatedly faced with the alternative
of accepting some form of delayed payment in return for goods sold
or possibly losing a good customer.
In the past, merchants have faced the dilemma of delayed-payment
sales assisted by a number of different devices and techniques. For
example, some merchants have maintained card files indicating the
status of their customers. Systems also have been used which
photograph the customer along with his identification and the bank
check if the transaction involves such a check. Furthermore,
automatic data-processing systems have been employed to maintain a
status record of many customers. One form of such a system is shown
and described in pending United States patent application Ser. No.
102,486, Patent 3,212,062, to which the present invention is
related.
Although various prior systems have been very helpful in reducing
the losses incurred by merchants from credit transactions, several
disadvantages remain. Specifically, for example, prior systems have
often necessitated a delay period for a customer, during which the
sales person consulted the manager, referred to records, or
interrogated a data-processing system. Such a delay is sometimes
embarrassing to the customer and annoying to other customers
waiting for service. Therefore, a need exists for an improved
system of manifesting a customer's status at a sales station, with
essentially no delay. Furthermore, a need exists for such a system
which is relatively simple, economical, and which may be embodied
to provide a small, somewhat obscure unit at a retail sales
station.
Various systems as considered above, for verifying an individual
subjects status (before allowing a credit transaction) have
sometimes incorporated a catalog of customers. For example, a card
file of customers may be maintained for manual reference or credit
cards may be issued to customers for presentation to indicate that
the customer may cash a bank check or make purchases on credit. The
maintenance of an accurate card file involves considerable effort.
The practice of issuing credit cards also has disadvantages, as the
difficulty of accounting for lost cards and the problem of
maintaining reasonable restrictions upon the extent to which a card
may be used. As indicated, these problems have been somewhat solved
by prior information-handling systems: however, a need remains for
a small, simple, fast system readily usable in cooperation with a
list of customers in a single store, for reducing credit and bank
check losses. It is also important that such a system provide the
capacity for a large number of subjects, relative to the size and
cost of the system.
It is therefore an object of the present invention to provide an
improved system for use in cooperation with a list of customers or
other subjects who may or may not carry credit cards bearing a
numerical designation.
Another object of the present invention is to provide an improved
system including a central apparatus for storing status information
on a plurality of subjects, as customers, which unit will provide
an indication of status to any of a plurality of remote units which
may be conveniently located at sales stations.
Another object of the present invention is to provide an improved
system for maintaining a current status file on a multiplicity of
subjects, which is relatively simple and inexpensive.
Another object of the present invention is to provide an improved
information system as for use in a retail establishment, to
maintain and preserve a current status record on a large number of
customers, which system may be effectively used to provide status
information on any particular subject in a very short period of
time.
Still a further object of the present invention is to provide a
system for use on the premises of a commercial establishment,
incorporating a central unit registering the status of a large
number of customers, who may carry credit cards, which unit
operates in conjunction with a plurality of remote units, situated
at sales stations, each of which may interrogate the central unit
to receive the current status of a customer.
These and other objects and advantages of the present invention
will become apparent from a consideration of the following, taken
in conjunction with the drawing, wherein:
FIG. 1 is a perspective view of a system incorporating the present
invention;
FIG. 2 is a diagrammatic representation of a portion of the system
of FIG. 1;
FIG. 3 is a diagrammatic representation of another portion of the
system of FIG. 1;
FIG. 4 is a diagrammatic representation of one other portion of the
system of FIG. 1;
FIG. 5 is a diagrammatic representation of still one other portion
of the system of FIG. 1; and
FIG. 6 is a diagrammatic representation of an alternative
embodiment of the present invention.
Referring initially to FIG. 1, there is shown a central unit C
connected by a cable W to remote station units S1 and S2. The
central unit C contains a cyclic register means which records the
status for each of a multiplicity of subjects, e.g., store
customers, and when interrogated, the central unit C provides
signals indicative of status to an interrogating remote unit S1, S2
or the like, at which the status is indicated.
Considering the system in somewhat greater detail, the remote units
S1 and S2 along with any reasonable number of additional similar
units may be located at sales stations in a retail establishment.
The central unit C may be located at a convenient concealed
location to operate in cooperation with any of the remote units. As
the remote units are similar, only one is here described. The top
panel 10 of a remote unit mounts a plurality of lights, including a
red light 12, a yellow light 14, a green light 16 and a white light
18. In the operation of the system, the energization of the white
light 18 indicates the unavailability of the central unit C for
interrogation.
Upon presentation of a numerical designation from a customer, as by
a credit card, the sales person pushes a start button 20 to
establish communication with the central unit C. Next, the
numerical designation is keyed into the system on a decimal
keyboard 22. As a last step, the sales person strikes one of the
buttons 24 or 26. The button 24 is pressed when the customer
desires cash returned back to him from the transaction, and may
therefore be identified as a CB button. The button 26 is pressed
when the customer does not desire cash to be returned to him and
may be called the NC button. Of course, the buttons 24 and 26 may
be used in accordance with various considerations for example, the
value of the merchandise involved in the transaction or the type of
check being cashed. In general, the button 24 is pressed to
manifest the occurrence of transactions which might suggest caution
to a merchant. That is, if a customer receives substantial cash
from a transaction, it may be advisable to exercise some
intelligent consideration before returning more cash to him from
another transaction the same day. The system may thus record
cash-return transactions for manifestation upon the next
interrogation. Specifically, the occurrence of a recent cash-back
transaction is indicated by energization of the yellow light 14.
Indication of a clear status is made by energization of the green
light while a lost card or bad account number is indicated by
energization of the red light.
After the sales person has operated the remote unit as described
above, the central unit C senses a signal from the register
addressed by the numerical designation, which signal may indicate
(1) that the subject identified by the numerical designation may no
longer cash checks; (2) that the subject identified has recently
cashed a check and received cash in return; or (3) the subject is
in good standing as a credit customer and may be given credit or
his checks may be cashed. These signals are returned through the
cable W to illuminate one of the colored lights 12, 14 or 16
indicative of the customer's status as indicated, e.g., green for
good, red for bad, and yellow for questionable. Upon the occurrence
of energization of the yellow light the sales person will normally
call a supervisory person or consider other factors before
accepting a check or entering a credit transaction.
In the operation of the system, the cyclic register contained in
the central unit C may initially contain designations identifying
only good customers approved for credit. For example, all good
customers may have all been given fresh credit cards bearing
numerical designations and identification. Some period after the
cards are issued, some are lost and certain customers become bad
credit risks. Therefore, status signals for designations
identifying these customers within the central unit are changed.
This change is accomplished by entering the identifying numerical
designation through the keyboard 22 and the pressing of button 30
in the central unit to void a designation. In order to reactivate
or clear a designation a similar technique is employed depressing a
button 32 in the central unit C. To clear all unacceptable status
signals, as upon the issuance of fresh credit cards, a button 34 is
depressed. The buttons 36 and 38 are used to alter the
"questionable" or yellow status button 36 being employed to clear a
specific designation and button 38 employed to clear all
"questionable" status signals.
In the normal operation of this system, all "questionable" status
indications are periodically cleared depending upon the application
of the system. For example, it may be dangerous for the
establishment using the system as shown in FIG. 1 to return cash on
a subjects check more than once a day while there is little danger
in such a transaction on a daily basis. In such an instance, the
button 38 is depressed at the close of business each day to clear
all indications of cash-return transactions.
The manipulation of the buttons in the central unit C by an
unauthorized person could result in a substantial loss. Therefore,
the buttons are covered by a door 40 fitted with a lock 42 so that
the buttons are normally accessible only to authorized
personnel.
In the system as shown in FIG. 1, the units S1 and S2 may be
embodied to occupy very little physical space. As a result, these
units may be quite obscure at a sales station. Furthermore, the
remote units S1 and S2 may be energized through the cable W so that
auxiliary sources of electrical power are not required.
In using the system of FIG. 1, a sales person may enter the subject
customers numerical designation in a matter of seconds, and almost
instantly receive a status indication. For example, in one
satisfactory embodiment of the system, accommodating 10,000
numerical designations, and constructed substantially in accordance
with the system disclosed herein, a status light is illuminated
within 1/10 of a second after interrogating the central unit. That
is, within one tenth of a second after one of the buttons 24 or 26
is depressed one of the lights on the panel 10 is illuminated,
e.g., green if the credit card is valid and has not recently been
used to obtain cash from a transaction, yellow if the card is valid
but has been recently used to obtain cash from a transaction or red
if the card is not to be honored. Immediately after the status is
manifest, the sales person withdraws his finger, deenergizing one
of the signal lights as well as the white light which indicates the
system is in use at each of the remote stations, as unit S1.
The remote units, are energized from the central unit C so as to
accomplish exclusive coupling between a remote unit in use and the
central unit C. Referring to FIG. 2, showing a portion of one of
the remote units, a conductor 44 provides potential +A from the
central unit C to the remote unit. The conductor 44 is connected
through a switch 46 manually operated by the start button 20 on the
panel of the remote unit. Closure of the switch 46 energizes a
conductor 48 at a high potential level termed the GO signal. The GO
signal is returned through the conductor 48 to the central unit for
application to an "and" gate 50 (FIG. 3) symbolically represented
by a well known designation as used here throughout. The "and" gate
50 also receives a signal through a conductor 52 from an inverter
circuit 54, the output of which is at a high level during periods
when the system is not in use.
The system hereof employs two-state signals as well known in the
prior art of computers and data-processing systems for controlling
the states and outputs of gate circuits, flip-flop circuits and
inverter circuits. Therefore, upon receipt of two high signals, the
"and" gate 50 provides a high signal through a conductor 56 to
change the state of a flipflop circuit 58 so that the output
thereof to a conductor 60 is high. The output to the conductor 60
in a high state is termed +B1. The signal +B1 carried in the
conductor 60 from the individual flipflop 58 associated with the
remote unit S1 is applied to an "or" gate 62 represented by a
conventional symbol used hereout, along with similar outputs from
similar flipflops associated with each of the other remote units
which are all located at the central unit. The signal +B1 applied
to the "or" gate 62 energizes a delay circuit 64 to shortly drive a
conductor 66 to a high state causing the particular remote unit
that is in use to become exclusively locked to the central unit C.
Specifically, the high signal in the conductor 66 upon application
to the inverter circuit 54 produces a low signal in the conductor
52 thereby disabling the "and" gate 50 along with the other similar
gates associated with each of the remote stations. Furthermore, the
high signal in the conductor 66 energizes a plurality of lamps 68
illuminating the white lights 14 on each of the remote units to
indicate that the system is in use.
In view of the possibility that a partially completed interrogation
may occur at each of the remote units, the system automatically
disconnects a remote unit after a predetermined time interval.
Specifically the conductor 66 is connected through a time delay
circuit 70 having a delay period that is relatively long compared
to the interval of the delay circuit 64, e.g., ten seconds. The
output of the delay circuit 70 is applied to an "or" gate 72 which
upon qualification by any of a plurality of inputs provides a high
signal RE in a conductor 74 serving to terminate the
interconnection between a remote unit and the central unit by
resetting the flipflop 58 assuming the switch 46 at a remote unit
is closed.
Returning to consider the remote unit operation, and the associated
flipflop 58 (FIG. 3) produces a signal +B1 high to energize a
conductor 76 in the remote unit as shown in FIG. 2. It is to be
noted, that the conductor 76 in each of the remote units remains
unenergized until the start switch is closed.
After pressing the start switch to provide energy at the remote
unit, the operator keys the numerical designation for a subject
into the keyboard as considered above. A full decimal keyboard is
provided including 10 keys; however, as various key switches are
very well known in the prior art, a single representative key for
the decimal digit "five" is shown in FIG. 2. The key includes a
button 80 affixed to a shank 82 the lower end of which carries a
bumper 84 of insulating material. The bumper 84 is mounted for
vertical movement as shown and is spring biased to an upward
position by a leaf spring contact 86 which engages a fixed contact
88 when depressed (as shown). The fixed contact 88 is connected to
the conductor 76 so that upon closure of the contacts 86 and 88, a
circuit 90 is energized by the signal +B1 serving to provide a set
of binary coded decimal signals. The circuit 90 is branched to
provide a four-bit binary coded output in conductors 92, 94, 96 and
98. Of course each of the keys in the decimal keyboard of the
remote unit is differently coded; however, as the key under
consideration represents decimal "five," it carries a pair of
extensions 99 and 100 which closes switches 102 and 104
respectively connected in series with the conductors 96 and 92. The
conductor 92 represents the least-significant digit signal and
higher numbered conductors represent more-significant digit
signals. Thus, upon depression of the button 80, the bumper 84
moves the contact 86 into engagement with the fixed contact 88
energizing the circuit 90. At the time when these contacts were
closed, the switches 102 and 104 have been closed so that the
conductors 92 and 96 receive a high signal manifesting decimal
"five" in accordance with conventional binary-coded decimal format.
The conductors 92, 94, 96 and 98 from each of the code-forming keys
on the keyboard are interconnected to provide a single four-channel
output carrying signals N1, N2, N3 and N4. These signals manifest
decimal numbers in binary code and are applied to conductors 106,
108, 110 and 112 (FIG. 4) and comprise an output to a register 114
serving to address the memory system of the central unit C. The
energization of the circuit 90 (FIG. 2) also provides a signal S in
a high state, which serves to shift the contents of the register
114 (FIG. 4). That is, the register 114 includes four binary
stages, e.g., a units stage 114a, a tens stage 114b, a one hundreds
stage 114c, and one thousands stage 114d. Each of the stages is
similar and contains four flipflop circuits; therefore, only the
units stage is shown in detail and will be described.
The individual flipflop circuits 120, 122, 124 and 126 in the units
stage 114a serve to register and manifest binary components of a
decimal value representative of decimal "one," "two," "four," and
"eight," respectively. Specifically, the flipflop circuit 120
receives bits representative of decimal "one." The flipflop circuit
122 carries digits representative of decimal "two." The flipflop
circuit 124 carries digits representative of decimal "four" and the
flipflop circuit 126 carries bits representative of decimal
"eight."
These flipflop circuits are interconnected to receive the
binary-coded decimal values in parallel and thereafter function as
counters which are incremently advanced to eventually propagate an
overflow signal out of the register on a conductor 130 indicating
the register 114 has exceeded its capacity.
The flipflop circuits 120, 122, 124 and 126 are somewhat
conventionally represented as a "zero" half and a "one" half.
Inputs to each half on the left side of the flipflops set the units
in the state indicated by the half receiving the input. Inputs at
the division between the halves simply change the state. In a
somewhat similar fashion, the output conductors from the flipflops
present a high level of a two state signal when the associated half
is set. Output conductors from the mid section between the halves
provide a pulse output each time the flipflops change in state. The
adoption herein of this conventional method of representing
flipflops, their inputs and their outputs results in considerable
simplification in the presentation of the system.
The flipflops circuits 120, 122, 124 and 126 are connected
respectively to shift their contents into the tens stage 114b
through "and" gates 130, 132, 134 and 136. These gates are each
connected to receive a signal indicative of a registered "one" bit
in each of the flipflop circuits and the shift signal S from a
conductor 138. Therefore, each time a binary coded decimal digit is
manifest by signals N1, N2, N3 and N4 on the four conductors 106,
108, 110 and 112 by depression of a decimal key, the signal S
becomes high and the contents of each stage of the register 114 is
shifted into the next higher significant stage.
After the numerical designation for a subject is contained in the
register 114, that numerical value is incremented in synchronism
with a cyclic memory unit as considered below, so that at the time
the contents exceeds the capacity of the register 114, an overflow
signal O is generated identifying a location in the cyclic memory
in which the subjects status is contained.
Of course, any of a variety of memory units may be employed in
accordance herewith: however, as shown in FIG. 5, a cyclic magnetic
disc memory is disclosed herein. The memory includes a rotary drive
150 coupled to drive a magnetic disc 152 as generally well known in
the prior art. The disc 152 provides magnetic recording channels
154, 156, 158 and 160. The inside channel 154 communicates with a
read head 162 through which a marker pulse M is provided to a read
amplifier 164 once during each revolution of the disc 152. The
channel 156 is filled with regularly spaced magnetic variations
which are sensed by a read head 166 and provided as clock pulses C
through a read amplifier 168.
The channels 158 and 160 serve to record status signals for
subjects. In this regard, each numerical designation indicating a
subject, say from 0000 to 9999 is provided a recording space in
each of the tracks or channels 158 and 160. The presence of a
recorded pulse in the space assigned a subject in the channel 158
indicates that the designated subject may no longer cash checks or
make credit purchases, e.g., a "red" status. For example, the
numerical designation may identify a lost credit card or a customer
whose credit has become bad.
The recording track or channel 160 serves to account the recent
history of customers. For example, it may be desirable in a
business establishment to cash only one check per day for a
customer which involves the return of cash to a customer. In using
the system described herein in such an application, the recording
channel 160 would be cleared at the beginning of business, then
each time a subject cashed a check and received cash, an increment
signal would be recorded in the location assigned his numerical
designation. If a subject attempted to cash a second check and
receive money from the transaction, that fact would be manifest by
the system (yellow light) so that intelligent consideration could
be exercised to determine whether or not the second check should be
accepted.
The recording channel 158 provides pulses for the "red" signal
through a recording head 170 and a read amplifier 172. The channel
160 provides pulses for a "yellow" signal through a head 174 and a
read amplifier 176.
In the operation of the system, the type of transaction (cash back
or not for example) is keyed into the remote unit as part of the
inquiry. That is, closure of a switch 180 (FIG. 2) provides a
signal CB high indicating a "cash back" transaction. Somewhat
similarly, closure of a switch 182 provides a signal NC high
indicating "no cash" is to be returned. These signals are formed
after the binary coded decimal signals N1, N2, N3 and N4 which are
entered in the register 114 (FIG. 4).
After the inquiry is registered the system enters the first phase
of operation, which is manifest by the high state of a signal P1,
formed from an "and" gate 184 (FIG. 5) as will be described below.
During the first phase of operation the contents of the register
114 (FIG. 4) is incremented in synchronism with the movement of the
recording disc 152 by clock pulses C to locate the assigned
location for the numerical designation under inquiry. That is, as
the register 114 is incremented by clock pulses C, the disc 152
revolves toward the desired location at which the register 114 will
overflow to indicate the precise time at which the status signals
should be sensed from the disc. In this regard, the occurrence of a
"red" signal R indicating a bad numerical designation is provided
from an amplifier 190 (FIG. 5) while the occurrence of yellow
signals Y and green signals G are provided respectively from
amplifiers 192 and 194. These signals provide a voltage level
across the appropriate lamp 196, 198 or 200 as shown in FIG. 2 for
illumination of that lamp and manifestation of either a red, a
yellow or a green signal.
Thereafter, the system enters a second phase manifest by a high
level of a signal P2 formed by an "and" gate 186 as described
below. During the second phase of operation, the system awaits the
second period of availability of the subjects storage location (one
cycle of the disc 152 timed by the register 114 counting 1000 clock
pulses C) then, if the transaction involved returned cash, an
increment is recorded in the channel 160. The inquiry is then
complete and the sequence is terminated preparatory to another
inquiry.
A complete understanding of the operation of this system as
disclosed herein, as well as a knowledge of the detailed structure
may now best be accomplished by assuming certain exemplary
operations and explaining the sequence of operation stemming
therefrom. Prior to proceeding in that manner; however, a table is
set forth below of various signals identified herein along with the
names of the signals and their source. Reference to the table may
be convenient during consideration of the following
description.
______________________________________ Signal Name Source
______________________________________ C Clock pulses 10,000/drum
rev Amplifier 168 FIG. 5. M Marker pulse 1/drum rev Amplifier 164
FIG. 5. CB Cash-back transaction Switch 180, FIG. 2. NC No-cash
transaction Switch 182, FIG. 2. GO Start signal Switch 46, FIG. 2.
+A Power source FIG. 2 +B1 Power source-active unit S1 Flipflop 58
FIG. 3. G Green signal-Good Amplifier 194 FIG. 5. R Red signal-bad
Amplifier 190 FIG. 5. Y Yellow signal Amplifier 192 FIG. 5. P1
Phase 1 of operation Gate 184 FIG. 5. P2 Phase 2 of operation Gate
186 FIG. 5. S Shift loading pulse Contact 86 FIG. 2. O Register
Overflow Conductor 130 FIG. 4. RE Reset signal Gate 72 FIG. 3. N1
N2 N3 Binary coded decimal signals Circuit 90 FIG. 2. N4 A Phase
signal Flipflop 212 FIG. 5. B " Flipflop 214 FIG. 5.
______________________________________ Negations indicated by
(').
Assume a subject customer has presented a numerical designation as
by a credit card or other means to a sales person. Assume further
that the customer desires to cash a check involving a significant
cash return to him. The sales person interrogates the system in an
operation which will only take seconds, and which may be performed
very simply and easily. First, the sales person consults his remote
unit to determine whether or not the system is in use as signalled
by the illuminated white light 18 (FIG. 1). If the white light is
energized, the system is indicated to be in use; however, the
duration of the use is likely to be only a matter of seconds.
When the system is not in use, the sales person first depresses the
start button 20 (FIG. 1) closing a switch 46 (FIG. 2) providing the
signal GO high. The signal GO is applied to an "and" circuit 50
(FIG. 3) which, if the system is not in use as previously
described, passes a signal through a conductor 56 to set a flipflop
58, thereby providing the signal +B1 in a high state and energizing
the remainder of the keyboard switches.
With the signal +B1 high, the sales person depresses the
appropriate decimal buttons on the keyboard 22 to set the numerical
designation into binary coded decimal signals for entry into the
register 114 (FIG. 4). The most significant digit is keyed
initially and followed by the lesser significant decimal digits. Of
course, the operation is accomplished simply by striking the
appropriate decimal keys in the proper order in the keyboard 22.
Considering the detail structure, the operation of the "five" key
as shown in FIG. 2 will be considered. Upon depressing the button
80 of the "five" key the extensions 99 and 100 close the switches
102 and 104 connecting the first and third conductors carrying the
signals N1, N2, N3, and N4 to receive the high level of signal +B1.
As a result, the least significant (N1) and the third-least
significant (N--3) binary digits are energized to indicate decimal
"five" in accordance with well known convention.
The signals are applied to the input conductors 106, 108, 110 and
112 (FIG. 4) of the register 114. These conductors are connected to
the inputs of the flipflops 120, 122, 124 and 126 in stage one of
the register. Therefore, the flipflops 120 and 124 are placed in a
set state, while the flipflops 122 and 126 remain reset, thereby
indicating the value of decimal "five."
Upon the arrival of the next binary coded decimal digit at the
register 114, the shift loading pulse S also occurs high thereby
qualifying the "and" gates 130 and 134 to permit the set states of
the flipflops 120 and 124 to be propagated to the ten stage 114b of
the register. The third binary coded decimal digit is similarly
applied in signal form and propagates the prior digits into
higher-order stages of the register in a similar manner so that
after four keys have been depressed, on the keyboard of the remote
station, four decimal digits have been entered in the stages of the
register 114.
Next, the sales person operating the inquiry station depresses the
button to close switch 180 forming the signal CB high to indicate
cash is to be returned from the transaction. The signal CB is
applied to an "or" gate 202 (FIG. 5) along with the signal NC, the
output of which is applied to an "and" gate 204 along with the
marker signal M. Therefore, the "and" gate 204 is qualified at the
beginning of a revolution of the magnetic disc 152, resulting in
the application of a high-state signal through a conductor 206 to
an "and" gate 208. The "and" gate 208 also receives a signal from
an "or" gate 210 indicating the state of flipflops 212 and 214 the
outputs of which are designated A and B and the negations thereof
A', B' in accordance with convention. At this phase of operation,
the output from the "or" gate 210 is high to qualify the "and" gate
208 which sets the flipflop 212, thereby providing the signal A
high. It is to be noted, that the flipflops 212 and 214 are
interconnected in the manner of a counter so that each time the
flipflop 212 changes from a set state to a reset state, a pulse is
supplied to the flipflop 214 to change the state thereof.
Upon the flipflop 212 becoming set, while the flipflop 214 remains
reset, the "and" gate 184 is qualified to provide a high state for
the signal P1 indicating the first phase of locating status signals
from the magnetic disc 152. It is to be noted, that during this
phase the current status of a subject is selected from a magnetic
file while during the second phase (indicated by the high state of
the signal P2) the status of the subject may be changed.
The high state of the signal P1 (indicating a period of scanning
the magnetic memory channels) is applied to an "and" gate 214 (FIG.
4) through an "or" gate 216. As a result, the "and" gate 214 passes
clock pulses C from the disc 152 which increment the numerical
designation contained in the register 114. In this regard, the
content of the register is incremented in stepped phase with the
clock pulses C (metering the position of the disc 152) until the
register 114 overflows to indicate the location of the desired
status signal. It is to be noted that the location of the status
signal is complemented in relation to the numerical designation or
address signals. That is, if for example, the numerical designation
contained in the register 114 should be 3,762, the register would
overflow after receiving 6,238 clock pulses. Therefore, the
location in the recording channels on the disc 152 that is
addressed by the numerical designation 3,762 would be 6,238 binary
spaces from the point of beginning indicated by the marker pulse
M.
Considering the manner of incrementing the register 141, clock
pulses are applied directly to the flipflop 120 so that each clock
pulse changes the state thereof. Clock pulses are also
conditionally applied to "and" gates 222, 224, and 226. The "and"
gate 222 receives a pulse from the flipflop 120 each time the
flipflop is reset or changed from a state registering a "one" to a
state registering a "zero." In this manner, the flipflops within
the stage function as a binary counter. The gates 224 and 226
similarly interconnect the higher-order flipflop stages of the
counter so that the input clock pulses to the first stage of the
register 114 are accumulated toward a value of decimal "nine." When
the stage 114a registers "nine" the flipflop 126 and the flipflop
120 are both set while the flipflops 122 and 124 are reset. Upon
the arrival of the next-following clock pulse C, the flipflop 120
is reset providing a pulse through the "and" gate 222 which is
applied to an "and" gate 228. The "and" gate 228 also receives the
clock pulse, a signal from the flipflop 122 (which is high when
that flipflop is reset) and a signal from the flipflop 126 which is
high when that flipflop is set. Therefore, the "and" gate 228 is
qualified when the first stage of the register 114 advances from
decimal "nine." This advancement is manifest by a pulse from "and"
gate 228 which resets the flipflops 120, 122, 124 and 126 through a
conductor 230 and simultaneously increments the second stage of the
register 114 through an "and" gate 232 which is connected to
receive clock pulses.
The gate 232 applies pulses to the second stage in the same manner
as the "and" gate 214 applies pulses to the first stage. Thus, the
incremental operation of the register 114 is propagated through the
stages, advancing the contents of the register. Of course, similar
connections exist between each of the stages so that decimal
counting is propagated between the stages representative of the
decimal digits.
When the fourth stage of the register 114 propagates a digit from
an "and" gate 234 (coinciding to the gate 228 in the first stage)
the stages of the register are all clear (registering zero)
indicating that the capacity of the register has been exceeded,
i.e., attained decimal "10,000." In the assumed example, of a
numerical designation 3,762, the location 6,238 clock pulses from
the marker pulse M has been attained.
The overflow signal O from the register 114 is therefore applied to
the output circuits from the magnetic disc 152 in order to gate
output signals then sensed from the disc. Specifically, the
overflow signal O is applied to "and" gates 236 and 238 (FIG. 5)
which are qualified during the first phase of operation by the
signal P1. These "and" gates 236 and 238 are connected to receive
input signals from read amplifiers 172 and 176 respectively. If a
pulse is sensed by the read amplifier 172 in the single bit
position of the channel 158 from a location under observation, the
numerical designation for a subject customer is indicated to be
bad. Such a pulse is applied from the read amplifier 172 through
the "and" gate 236 to set a flipflop 240. In accordance with the
convention herein adopted, the inputs to the flipflop 240 are in
the lower portion and serve to provide the flipflop in a state
wherein the associated output is high. Therefore, the flipflop 240
is set to provide a high signal in a conductor 242 which is
received in the amplifier 190. Upon receiving such a signal, the
amplifier 190 provides an energizing signal R which is applied to
the lamp 200 (FIG. 2) to energize that lamp and manifest the
recorded reject signal for the assumed numerical designation. Upon
receiving such a signal, the sales person declines to accept the
tendered check and may take other action in accordance with the
policy of the establishment.
Assuming the numerical designation under consideration is valid, no
red signal R will be developed; however, assume (to illustrate
another possible operation) that the person identified by the
numerical designation has received substantial cash back from a
transaction just prior to the transaction presently under
consideration. In such an instance, a magnetic irregularity will
stand recorded in channel 160 of the disc 152 as will be explained
hereafter. Therefore, the read amplifier 176 provides an output
pulse which passes through the "and" gate 238, sets a flipflop 244
and therefore provides a high yellow signal Y from the amplifier
192 which energizes the yellow light 198 (FIG. 2). As a result, the
sales person is informed of the prior transaction and will take
appropriate action as by calling the manager, explaining the check
may not exceed the amount of purchase, or otherwise acting in
accordance with the establishment's policy.
If a magnetic irregularity is not contained at the address location
in either of the channels 158 or 160, the subject customer
identified by the numerical designation is to be approved by
energization of a green light. However, the green light is not
energized until the disc 152 has been completely scanned.
Specifically, at the conclusion of the first scansion over the
magnetic disc 152, the system enters phase 2 as manifest by a high
value for the signal P2 and return of the signal P1 to a lower
level. Thereupon, an "and" gate 248 (lower right FIG. 5) is
qualified providing neither flipflops 240 nor 244 were set. As a
result, a high signal is applied to a flipflop 250 which is set to
provide a high level of the green signal G through the amplifier
194 to energize the green light. Upon observing such a signal, the
sales person operating the system proceeds to conclude the pending
transaction in accordance with the establishment's policy. It is to
be emphasized, that the appearance of the light signal for
observation by the sales person occurs seconds after the system is
interrogated. Therefore, the verification of a subject's status is
completed rapidly and without embarrassment.
Upon completion of the first scan over the magnetic disc 152, the
first phase is terminated by qualification of an "and" gate 252
(upper center FIG. 5) which receives the signals M and P1 as
inputs. Qualification of the "and" gate 252 (indicating the first
phase manifest by a high level of the signal P1 has existed for one
revolution of the disc 152) results in the application of a pulse
to the flipflop 212 resetting that flipflop and setting the
flipflop 214. As a result, the signals A' and B are high to qualify
the gate 186 thereby setting the signal P2 at a high level. Upon
this occurrence the "and" gate 184 becomes disqualified with the
result that the signal P1 drops to a lower level.
During the second phase of operation, manifest by a high level of a
signal P2, the system functions to record the fact that cash has
been returned to a customer, providing that instruction is given to
the system. In the assumed example, cash is to be returned to the
customer, therefore, the signal CB is in a high state. Therefore,
the customer's registration space in the channel 160 is to be found
and a magnetic irregularity recorded therein.
To recapitulate, upon locating a subject customers cell in channels
158 and 160 on the disc 152, an overflow was provided from the
register 114 (FIG. 4). Afterward, the counter 114 continues to
operate and will again overflow during phase 2 which is manifest by
a high value of the signal P2 (qualifying the gate 254) at exactly
the same location in view of the relationship between the capacity
of the counter 114 and the fact that a similar binary capacity is
provided by the disc 152. As a result, the overflow signal O occurs
at a high value precisely at the time of the second occurrence of
the customer's addressed location in the channel 160 under the head
174. The heads 170 and 174 (FIG. 5) are both read-record heads;
therefore, provision of a pulse to either of these heads
accomplishes a magnetic irregularity in the associated channel
which may be later sensed.
The assumed transaction involved cash return to a customer,
therefore the switch was closed providing the signal CB in a high
state. Therefore, at the instant when the customers location is
available for a second time an "and" gate 254 (lower right FIG. 5)
is qualified by high levels of the signals P2, O, R' and C. The
resulting high signal from the gate 254 is applied to an "and" gate
256 along with the signal CB manifesting cash return to the
customer to provide a pulse for recording on the disc 152. That is,
upon qualification of the gate 256, a pulse is supplied to the head
174 through a write or record amplifier 258 which records a binary
bit in the channel 160 indicating cash has been returned to a
customer identified by numerical designation.
At the conclusion of the second scanning of the magnetic disc 152
the second phase manifest by a high level of the signal P2 is
terminated by an "and" gate 260 (upper center FIG. 5). The gate 260
senses the occurrence of the marker pulse M as one input during the
phase indicating signal P2 and supplies a pulse to reset both of
the flipflops 212 and 214. As a result, neither phase 1 nor phase 2
is manifest and the system becomes somewhat quiescent although the
light signal is still energized.
The light signal continues to be provided until the operator
releases the switch he has closed indicating whether or not cash is
to be returned. That is, when the operator withdraws his finger
either from the switch 180 or 182 (FIG. 2) the signals CB and NC
both return to a low state. As a result, an inverter 262 (lower
right FIG. 3) receives a low signal from an "or" gate 264 so as to
provide a high signal to the gate 72. The signal RE is formed in a
high state which resets the flipflop 58 terminating the +B1
energizing signal, and similarly resets the light energizing
flipflops 240, 244 and 250 as shown in FIG. 5.
If an inquiry is initiated but not completed, the time delay
circuit 70 functions, also through the gate 72 to provide the
signal RE high and reset the various flipflops. Therefore, the
system automatically terminates partially completed inquiries and
yet enables the operator to hold the signal on long enough for
clear visual observation.
It is to be noted, that the operation accomplished when no return
of cash to a customer is contemplated is substantially similar to
that described below. However, during phase two of the operation
the signal CB remains low so that no recording may take place in
the channel 160. Otherwise, the signals CB and NC are substantially
similarly applied with the result that the status of a subject
customer is clearly indicated by the light illuminated at the
remote inquiry station.
In the use of the system described herein, it may be desirable to
periodically alter a subjects status. Furthermore, upon issuing
fresh credit cards or otherwise completely revising a list it will
be desirable to completely clear the system. Still further, if cash
return transactions are sensed on a daily basis it will be
desirable to clear the channel 160 at the close of a business day.
These operations are accomplished by switches 30, 32, 34, 36 and 38
on the central unit shown in FIG. 1. Electrical representations of
these switches are variously shown in FIG. 5 and their operation
will now be considered in detail.
Assume initially that it is desired to record a status indicative
of a bad numerical designation as for example when a credit card is
reported to be lost. Upon such an occurrence, the system is
activated just as though an inquiry were being made relative the
numerical designation; however, additionally, the switch 30 (lower
right FIG. 5) is also closed. As a result, in the same manner in
which pulses are recorded in the cash back channel 160, pulses are
recorded in the reject channel 158. Specifically, upon closure of
the switch 30, an "and" gate 270 is qualified during the second
phase upon occurrence of the selected numerical designation
location. As a result, a pulse is supplied through the gate 270 to
a write or record amplifier 272 which in turn provides the pulse
for recording by the head 170. As a result, future interrogation of
the storage location results in, a red signal.
The structure for clearing recorded signals from the channels 158
and 160 is generally shown in the lower left portion of FIG. 5. To
completely clear the channel 158 the switch 34 is closed qualifying
an "and" gate 274 which is also connected to receive an input from
an "and" gate 276 which senses clock pulses during phase two as a
result of input signals P2 and C. As a result, closure of the
switch 34 during an inquiry results in the application of pulses
during the entire period of phase two (initiated by an inquiry
directed to any numerical designation) through an "or" gate 278 to
an inverter 280. Inverter 280 reverses the form of the pulses for
application to the write amplifier 272 with the result that
negation signals are applied to the head 170 serving to clear all
recorded information in the red channel 158.
A somewhat similar operation may be performed on a daily basis by
closing the clear yellow switch 38 to qualify an "and" gate 282
during phase 2 so as to provide clock pulses for inversion by an
inverter 284 so as to clear the yellow channel 160 through the
write amplifier 258 and the head 174.
To clear a selected bit recorded at a specified address in either
the red channel 158 or yellow channel 160 switches 32 and 36 are
provided. Closure of the switch 32 after initiating a conventional
inquiry qualifies an "and" gate 292 during the overflow signal O at
phase 2 in coincidence with the appearance of the identified
storage cell under the head 170. As a result, the pulse is applied
through the gate 278, the inverter 280 and the amplifier 272 to
erase a recorded bit. In a very similar manner, the closure of the
switch 36 during a conventional inquiry qualifies an "and" gate 300
to provide a precisely timed pulse through an "or" gate 302 and the
inverter 284 so as to drive the amplifier 258 which in turn drives
the head 174 to function clearing the recorded bit.
It may therefore be seen, that the system of the present invention
functions to accurately account for the status of various subjects,
and is capable of reporting such status a very short time after
inquiry. In this regard, it is to be noted that each time a subject
customer enters a transaction suggesting caution, the fact is
indicated to be revealed upon future inquiries.
It is further apparent that embodiments of the present system may
be manufactured to occupy a very small space to conveniently
provide the desired information in a very short time. Of course,
other and incidental objects of the present invention will also be
apparent to those skilled in the art of data and information
systems. Furthermore, many variations of this system may be
provided departing widely from the structure illustratively
disclosed herein.
It is also apparent that the system described herein may be adopted
for use with various other basic operating principles. For example,
a green light may indicate a customer has an unlimited or specified
high credit balance, a yellow light indicates some question as a
result, say of a recent check being cashed, and a red light might
indicate a balance of some low amount, or no balance. Of course, in
addition to incrementing the yellow channel for an occurrence it is
readily apparent that other channels can be provided to be
incremented to numerical values higher than one.
Other applications are also apparent. Specifically, for example,
the system hereof could easily be adapted for use in a commercial
bank to save time and embarrassment in cashing personal checks. For
example, remote units, as described may be located at teller
windows in one arrangement of such an application. The customers
numerical designation then may simply form part of his bank number.
In operating the system several alternatives are available;
however, in one arrangement some dollar amount, say one hundred
dollars is made significant. Each day when the accounts are
processed (customarily by machine) any account having less than one
hundred dollars is tagged and a pulse is recorded in the "red"
channel 158 (FIG. 5) for that customers numerical designation.
Accounts of over one hundred dollars are cleared and no pulses are
recorded for such customers in either of the channels 158 or
160.
In an installation of this type, upon being presented a personal
check of under one hundred dollars, the window teller simply sets
the customers numerical designation into a remote unit located at
his side. That operation can be performed rapidly and may well
escape the attention of the customer. If the customer is not tagged
with a low balance and has not cashed a check that day, the green
light is illuminated, as previously described, indicating a balance
of over one hundred dollars. If, however, the customer had a low
balance, the recorded pulse from the "red" channel 158 causes the
red light to be illuminated, thereby informing the teller that
further investigation must be performed.
Upon cashing a check, the teller in making an inquiry on a customer
(identified by a numerical designation) automatically increments
the registered value by recording a pulse at the customer's
location in the "yellow" channel 160. Thereafter, if that customer
subsequently presents another check during the day, the pulse from
the "yellow" channel 160 recorded in his location serves to
illuminate the yellow light, cautioning the teller by informing him
of the prior check which may have reduced the customers balance
below a safe level. The operations as described may be performed
inconspicuously, with ease and results are indicated almost
instantly. This application of the system therefore can provide a
commercial bank considerable safety in check-cashing operations
while also improving customer relations by avoiding embarrassing
delays to check current balance sheets and the like.
In another exemplary application, the system hereof, is employed as
a "lock" for purposes of security control as at a facility where
only certain authorized persons are permitted. For example, the
system hereof may be applied for use in controlling various
facilities as parking lots, security plants and the like. An
examplary form of the system so adapted is shown in FIG. 6 to which
reference will now be made.
Assume for example, that the system is to be used to control a
parking lot for automobiles, and that identification cards are
issued only to persons who are authorized to park an automobile in
the lot. The cards may be provided with indentations, apertures,
magnetic deposits of other means, as very well known in the prior
art which can be sensed as by transducers, photo cells, switches
and the like to provide digital signals indicative of numerical
designations.
For use in association with the cards held by persons authorized to
use the lot, there are provided one or more gate units 350 for use
in connection with a central unit 352, as previously described. The
gate units 350 include a blocking bar 354 which closes the gate
passage indicated by an arrow 355, until the person desiring to
enter is properly identified. Thereafter, the blocking bar 354 is
released, so it can be pushed to an open position to permit
entry.
The gate units 350 may vary in number and are each of similar
structure. Identifications can be made by signals formed on a
keyboard (as previously described in detail) or more ideally, by a
card, or other "key" as well known in the prior art. For example, a
plastic card may be inserted in a slot 356 contained in a gate box
358 which is similar to the remote units described above in detail,
except that coded numerical designation signals are sensed from a
card rather than to be keyed into the unit. In this regard, the
gate box has a "start" button 360 similar to the "start" button 20
(previously described) and an "open" button 362 which is
functionally similar to the "cash back" button 24 of the described
unit. That is, the switch controlled by the button 362 is logically
connected into the system just as that of the previously-described
button 24.
Generally, in the operation of the system of FIG. 6, a person
wishing entry simply inserts his coded card into the slot 356,
observes that the white light 18 (as previously identified) is not
illuminated to indicate the system is not in use; then presses the
"start" button 360 to provide the GO signal high. Next, the "open"
button 362 is depressed to form a signal CB high. If the person is
identified by the system detecting an authorized numerical
designation, the green light 16 is energized. Furthermore, the
signal appied to the green light also triggers a solenoid 364
withdrawing a latch 366 releasing an extension 368 to permit the
gate blocking bar 354 to be pivotally moved about the pivot point
370. After entery, a spring 372 returns the bar 354 to a closed
position.
In the operation of the system, pulses may be recorded in the red
channel 158 in the locations of numerical designations for lost or
rejected cards.
Presentation of such cards is then indicated upon illumination of
the red light 12.
The yellow channel 160 may be cleared each morning before any
persons arrive. However, as each person arrives, is identified and
approved for entry, a representative pulse is recorded in the
yellow channel 160. Therefore, if a duplicate card is presented,
the pulse so recorded then causes the yellow light 14 to be
illuminated manifesting that fact. Of course, if neither the red
light 12 nor the yellow light 14 is energized, the green light 16
is energized and the gate is released.
The system may thus be effectively used either attended or
unattended. In the latter case, it may be desirable to place the
signal lights at a location removed from the gates. Furthermore, in
unattended use, it may also be desirable to combine the closure of
the switches operated by the buttons 360 and 362 with the insertion
of the card into the slot 356. In this recard, leaf-spring switches
may be built into the slot 356 for closure upon entry of an
identification card.
The system as described above has application in a number of
situations for controlling several points of entry. For example, as
suggested, the system would find effective application for
controlling personnel entering a security plant. More specifically,
the gate structure of FIG. 6 would for example be located at each
of the entry points. Persons entering would be identified as by
"key" cards, identification badges with numbers, or otherwise and
their numerical designations would be formed into representative
signals to interrogate and increment the contents of the central
unit. As described, before entry is permitted, the identifying
numerical designation is checked for current validity and duplicate
use. Therefore, very effective control is afforded, an inventory of
persons who have entered is available, lost or otherwise invalid
identification numerical designations are accounted all with
relatively simple and inexpensive system.
It is readily apparent that although several examplary embodiments
of the present invention have been provided, other structural
embodiments will be readily apparent to those skilled in the art.
Therefore, the scope hereof is not to be interpreted with relation
to the disclosed, examplary embodiments, but rather in accordance
with the claims set forth below.
* * * * *