U.S. patent number 3,715,031 [Application Number 05/133,847] was granted by the patent office on 1973-02-06 for post validator for bill acceptor.
This patent grant is currently assigned to Rowe International, Inc.. Invention is credited to Oliver G. Okkonen.
United States Patent |
3,715,031 |
Okkonen |
February 6, 1973 |
POST VALIDATOR FOR BILL ACCEPTOR
Abstract
A post validator arrangement for a bill acceptor of a type known
in the prior art utilizing a combination of photoelectric and
magnetic checks of an item of currency passing therethrough in
which the item is required to pass a secondary magnetic test at a
location beyond an improved one-way mechanical gate positioned at
the outlet of the bill acceptor.
Inventors: |
Okkonen; Oliver G. (Comstock
Park, MI) |
Assignee: |
Rowe International, Inc.
(Whippany, NJ)
|
Family
ID: |
22460564 |
Appl.
No.: |
05/133,847 |
Filed: |
April 14, 1971 |
Current U.S.
Class: |
209/534; 209/586;
209/567 |
Current CPC
Class: |
G07D
7/12 (20130101); G07D 7/04 (20130101) |
Current International
Class: |
G07D
7/04 (20060101); G07D 7/00 (20060101); G07D
7/12 (20060101); B07c 003/16 () |
Field of
Search: |
;209/DIG.2,111.8,75
;194/4R,4B,4C,4D,4E,4G ;232/4,62 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Knowles; Allen N.
Claims
Having thus described my invention, what I claim is:
1. A bill acceptor and post validator system for delivering
acceptable bills to a receptacle including in combination, means
forming a passage having an inlet and an outlet, means located
between said inlet and said outlet for producing a signal in
response to a genuine bill travelling along said passage, a one way
mechanical gate between said outlet and said receptacle and means
between said gate and said outlet for testing the genuineness of
said bill.
2. A system as in claim 1 including an output line and means
responsive to said testing means for passing said signal to said
line.
3. A system as in claim 1 in which said testing means comprises a
magnetic reading head and means for conveying said bill past said
head.
4. A system as in claim 3 in which said testing means comprises an
idler roll, means mounting said head for movement toward and away
from said roll, and means for biasing said head toward said idler
roll to provide a nip therebetween, said conveying means carrying
said bill into said nip.
5. A system as in claim 1 in which said gate comprises a jaw, means
mounting said jaw for movement adjacent said outlet, and means
biasing said jaw into the path of a bill emerging from said
outlet.
6. A post validator as in claim 1 including a shaft adapted to be
driven in a forward direction and in a reverse direction, said gate
including a jaw frictionally carried by said shaft for movement out
of the path of a bill passing through said outlet in response to
forward movement of said shaft and into said path in response to
reverse movement of said shaft.
7. A system as in claim 1 in which said one way gate includes a
jaw, means mounting said gate for movement adjacent said outlet,
and means for biasing said jaw into the path of a bill moving
through said outlet, said validator including a vane carried by
said jaw for movement therewith, and means associated with said
vane for producing a signal in response to movement of said jaw
back into said path as the trailing edge of a bill passes said
jaw.
8. A system as in claim 7 in which said testing means comprises
means for producing a second signal in response to passage of a
genuine bill thereby and means responsive to the concomitant
presence of both of said signals for producing a bill accept
signal.
9. A system as in claim 1 in which said one way gate comprises an
upper jaw having teeth, means mounting said jaw for movement
adjacent said outlet, means biasing said upper jaw into the path of
a bill passing through said outlet, a shaft adjacent said outlet
adapted to be driven in a forward direction, a lower jaw
frictionally carried by said shaft for movement out of said path in
response to forward movement of said shaft and for movement into
said path with the upper and lower jaw teeth meshing in response to
reverse movement of said shaft.
10. A post validator for a bill acceptor which tests the
genuineness of a bill passing therethrough from an inlet to an
outlet toward a receptacle located beyond said outlet including in
combination, a one-way mechanical gate comprising a jaw mounted for
movement adjacent said outlet and means for biasing said jaw into
the path of a bill passing through said outlet, means responsive to
return movement of said jaw into said path following movement of
the trailing edge of a bill thereby for producing a first signal, a
magnetic sensor located between said outlet and said receptacle for
producing a second signal in response to the passage of a genuine
bill thereby, means for conveying a bill from said outlet past said
magnetic sensor, and means responsive to the concomitant presence
of said first and second signals for producing a bill accept
signal.
11. A post validator as in claim 10 in which said first signal
producing means comprises a light source and a photocell mounted in
spaced relationship and a vane carried by said jaw for movement
into and out of the space between said source and said
photocell.
12. A post validator as in claim 10 including an idler roller
associated with said head and means biasing said head toward said
idler roll.
13. A post validator as in claim 10 in which said jaw is a first
jaw having teeth, said validator including a shaft mounted adjacent
said outlet for movement in a forward direction and in a reverse
direction and a second jaw carried by said shaft for movement out
of the path of a bill passing through said outlet in response to
forward movement of said shaft and for movement into the path in
response to reverse movement of said shaft.
14. A bill acceptor and post validator system for producing a bill
accept signal in response to passage of a genuine bill from an
acceptor inlet to an acceptor outlet and through the validator to a
receptacle wherein said bill carries a magnetized area, including
in combination, a bill acceptor comprising an inlet, an outlet,
means including a reversible drive for carrying a bill along a path
between said inlet and said outlet, means responsive to insertion
of a bill into said inlet for energizing said drive means in a
forward direction, photoelectric means along said path for
producing a first electrical signal in response to passage of the
leading edge of a bill thereby, means for producing a second signal
in response to the passage of said magnetized area of a genuine
bill thereby, means responsive to the presence of one of said
signals for reversing said drive means, and means responsive to the
concomitant presence of said first and second signals for
inhibiting said reversing means, and a post validator comprising a
one way mechanical gate adjacent said outlet, means responsive to
passage of the trailing edge of a bill past said gate for producing
a third signal, auxiliary means located between said outlet and
said receptacle for magnetically producing a fourth signal in
response to the passage thereby of said magnetized area of a
genuine bill, means for conveying a bill from said outlet past said
auxiliary means and means responsive to the concomitant presence of
the third and fourth signals for producing said bill accept
signal.
15. A system as in claim 14 in which said auxiliary means comprises
an idler roller, a magnetic head, means mounting said head for
movement toward and away from said roller and means biasing said
head into engagement with said roller.
16. A system as in claim 15 in which said one way gate comprises an
upper jaw having teeth, means mounting said upper jaw adjacent said
outlet for movement into and out of the path of a bill, means
biasing said upper jaw into said path, a shaft mounted adjacent to
said outlet, means responsive to said drive means for driving said
shaft, a lower jaw having teeth adapted to mesh with the upper jaw
teeth, said lower jaw being frictionally carried by said shaft for
movement out of said path in response to forward movement of said
shaft and for movement into said path in response to reverse
movement of said shaft.
17. A system as in claim 14 in which said conveying means is
adapted to be driven in a forward direction to convey said bill
from said outlet past said auxiliary means, and in which said
conveying means comprises means for engaging said bill, a drive
motor and a one-way clutch between said motor and said engaging
means for driving said engaging means in said forward direction.
Description
BACKGROUND OF THE INVENTION
With the increasing use of merchandising machines and under the
press of inflation, there have been developed in the prior art
devices which make change in response to the insertion of a dollar
bill therein. Such devices also are incorporated in machines to
permit articles or services to be purchased for currency rather
than requiring the customer to use coins. One such device is shown
and described in Hooker U.S. Pat. No. 3,485,358. That device puts
out a signal in response to passage therethrough of a valid dollar
bill. It will readily be appreciated that great care must be taken
in such a device to ensure that change is made or a credit signal
is given only in response to passage of a valid bill through the
device and that the possibilities of cheating the acceptor must be
kept to a minimum if not entirely eliminated. In order to test a
bill in the device shown in the patent, it must pass both
photoelectric and magnetic tests before an accept signal is given.
If the bill fails to pass these tests the acceptor drive system is
reversed and the bogus bill or the like is driven back out of the
device.
A number of schemes have been devised by dishonest persons in
attempting to cheat the acceptor described above. For example,
pieces of paper or the like simulating dollar bills have been used
in attempts to cheat the mechanism. Moreover, attempts have been
made to withdraw a genuine bill from the mechanism after it has
passed the required tests as by attaching a string to the end of
the bill. The acceptor shown in the prior art cannot usually be
cheated by use of either of these expedients. First, the magnetic
test provided is sufficiently sensitive that most facsimiles of
genuine bills fail the test. Moreover, this acceptor will not give
credit in response to an extremely long strip of paper. It is
provided with a mechanical gate at the end thereof which is
intended to prevent withdrawal of a genuine dollar bill after it
has passed all the tests provided.
While the acceptor of the type shown in the Hooker patent operates
satisfactorily in most instances in which attempts are made to
cheat the device, dishonest persons have come up with increasingly
ingenious schemes for cheating the system. First, the mechanical
gate provided at the outlet of the acceptor described above is not
as effective as is desirable. Secondly, some schemes have been
devised for effectively passing the magnetic check provided in that
system without the loss of the means which permits the test to be
passed. Thus, even as sophisticated a system as is shown in the
Hooker patent may, under some conditions, be cheated.
I have invented a post validator for a bill acceptor which
overcomes defects of bill acceptors of the type known in the prior
art. My post validator is compatible with existing bill acceptors.
It incorporates an improved mechanical gate which prevents
withdrawal of any material which has traveled beyond the gate. My
post validator prevents cheating of the system even by an
arrangement which passes the magnetic test of the acceptors known
in the prior art.
SUMMARY OF THE INVENTION
One object of my invention is to provide a post validator for a
bill acceptor which overcomes the defects of bill acceptors of the
type known in the prior art.
Another object of my invention is to provide a post validator which
is compatible with existing bill acceptors of the prior art.
Another object of my invention is to provide a post validator for a
bill acceptor which prevents cheating even by an arrangement which
passes the magnetic test provided in a bill acceptor of the prior
art.
Still another object of my invention is to provide a post validator
for a bill acceptor which validator incorporates an improved
one-way mechanical gate.
Other and further objects of my invention will appear from the
following description.
In general my invention contemplates the provision of a post
validator for a bill acceptor providing a preliminary magnetic
check and a photoelectric check of an item of currency in which the
item is required to pass a secondary magnetic check at a location
beyond an improved one-way mechanical gate positioned at the outlet
of the bill acceptor before an accept signal will be given.
BRIEF DESCRIPTION OF THE DRAWINGS
In the accompanying drawings which form part of the instant
specification and which are to be read in conjunction therewith and
in which like reference numerals are used to indicate like parts in
the various views:
FIG. 1 is a sectional partial schematic view of a bill acceptor
provided with my post validator.
FIG. 2 is an end elevation of the arrangement shown in FIG. 1
incorporating my post validator.
FIG. 3 is a simplified diagram illustrating the logic of the
electrical system incorporated in the post validator.
DESCRIPTION OF THE PREFERRED EMBODIMENT
Referring now to the drawings the system shown therein includes a
bill acceptor indicated generally by the reference character 10 of
the general type shown and described in the Hooker patent referred
to hereinabove. This acceptor 10 includes a housing 12 carrying a
lower bill track 14 and an upper bill track 16 making up a channel
or passage 18 into which a dollar bill can be inserted through a
mouth 20. I dispose respective groups of rollers 22 and 24 carried
by shafts 26 and 28 at a first location along the length of passage
18 at which the leading edge of a bill can be inserted into the nip
of the two rollers 22 and 24. As the bill moves along the passage
its leading edge is picked up in the nip between the groups of
rollers 34 and 36 carried respectively by shafts 38 and 40. The
bill moves further along the passage to the nip between groups of
rollers 42 and 44 carried respectively by shafts 46 and 48. From
the rollers 42 and 44 the bill travels along a downwardly inclined
portion of the passage 18 to the nip between groups of rollers 50
and 52 carried by shafts 54 and 56 at the outlet of the bill
acceptor 10.
As is more fully described in the Hooker patent, the acceptor 10
includes a motor 58 which is energized to drive a shaft 60 which,
through a gear box 62 drives an output shaft 64. As I have
indicated schematically by the dot-dash line 66 a timing belt
driven by shaft 64 drives shafts 28, 40 and 48 at a predetermined
speed. A rubber belt or the like indicated schematically by the
dot-dash line 68 drives shaft 54 from shaft 48.
As a bill is inserted portrait side up into passage 18 through the
mouth 20 it first covers an aperture A1 in the lower track 14 to
block light from a source L1 to a photocell P1. Upon traveling
further along passage 18 the bill moves through the field of a
permanent magnet M to cause the areas of magnetic ink thereon to
magnetized. As is known in the art, these areas are located in the
background region of the portrait. Next, the bill moves past the
rollers 34 and 36 and under a magnetic head H1 with which it is
urged into contact by a pressure roller 70 carried by a lever 72
supported on a pivot pin 74. A spring 76 normally urges lever 72 to
a position at which the pressure roller 70 pushes the bill upwardly
toward the head H1. A solenoid S is adapted to be energized in a
manner to be described to move roller 70 away from the bill path
against the action of spring 76.
As it travels down the inclined portion of passage 18 finally the
bill covers an aperture A4 to prevent light of a lamp L4 from
reaching a photocell P4. Finally the bill moves to a position
between the nip of roller 50 and 52 and is discharged from the bill
acceptor 10.
The structure thus far described is similar to that shown in the
Hooker patent referred to hereinabove. I modify the structure of
the Hooker device by mounting the hub 78 of a claw 80 having teeth
82 on shaft 56. A spring 84 biases the claw 80 for movement into
the path of a bill to be described hereinbelow. I also frictionally
mount the hub 86 of a lower claw having teeth 90 on shaft 54. As
will be described more fully hereinafter when shaft 54 is driven in
a forward direction claw 88 moves out of the bill path to the
dot-dash line position shown in FIG. 1.
My post validator indicated generally by the reference character 92
includes a frame 94 having bushings 96 on which I mount a shaft 98
carrying outer drums 100 and 102 adjacent the ends thereof. I
provide respective belts 104 and 106 associated with the drums 100
and 102 for holding a bill against the surface of the drums 100 and
102. The respective belts are trained around upper idler rolls 108
and 110, first lower idler rolls 112 and 114 and second idler rolls
116, one of which is shown in FIG. 1. Respective shafts 118, 120
and 122 support the pairs of idler rolls 108 and 110, 112 and 114
and 116. A sprocket wheel 124 driven by a timing belt 126 which
engages a sprocket wheel 128 on shaft 64 drives shaft 98 in the
forward direction through a one-way clutch 127 to drive drums 100
and 102 and belts 104 and 106. This prevents the bill from being
driven back toward the jaws.
I mount an idler drum 130 on the central portion of shaft 98 for
free rotation relative thereto. A pivot pin 132 on the frame 94
supports a bracket 134 normally urged by a spring 136 to a position
at which a secondary magnetic sensing head H2 is urged toward the
periphery of drum 130. In this way the drum does not rotate against
the magnetic head to wear the same when no bill is in the
system.
A vane 138 carried by hub 78 for rotation therewith is normally
positioned between a photocell P6 and a Lamp L6.
As a bill is inserted into the channel 18 through the mouth 20 it
first interrupts the light going from L1 to P1 to cause the
photocell output to drop. This signal is amplified by an amplifier
G1 and passes through an isolating diode 140 to an inverter 142.
The inverter signal passes through a diode 144 to charge a
capacitor 146 to apply the signal to an emitter follower 148.
Capacitor 146 is so selected as to maintain an input signal to the
emitter follower for a sufficient period of time after P1 is again
illuminated to enable the acceptor to function. The output of the
emitter follower is applied to respective amplifier channels 150
and 152, the outputs of which provide one input each to respective
two-input-AND circuits 154 and 156 which lead to the forward and to
the reverse relays (not shown) for the motor 58.
The output of inverter 142 also passes through two diodes 143 and
145 to an amplifier 147 which activates solenoid S until the
trailing edge of the bill leaves the space between L1 and P1. When
that occurs solenoid S deenergizes and pressure roller 70 forces
the bill into intimate contact with head H1.
The output of inverter 142 also provides one input for
two-input-AND circuit 158 which, as will be explained hereinafter,
has no input applied to an inhibiting input terminal 160 so long as
P1 and P4 are not blocked at the same time. I apply the output of
the AND circuit 158 to the forward input terminal of a motor
control flip flop 162 to provide the other input for circuit 154 to
cause motor 58 to be energized to drive in the forward direction.
Under the conditions just described, the motor 58 is energized to
cause the bill to be moved along the channel 18. As the magnetic
ink of the bill passes under magnet M it is magnetized temporarily.
When that portion of the bill passes under the head H1, two spaced
pulses X1 and X2 are produced on a channel 164 leading to an
inhibiting input terminal 166 of a two-input-AND circuit 168. I
have schematically indicated these pulses X1 and X2 adjacent to
channel 164 in FIG. 3. It will be appreciated that the existence of
either of these two pulses at terminal 176 prevents circuit 158
from producing an output even in the presence of a signal at its
other input terminal.
As the bill travels along the passage 18 its leading edge covers
aperture A4 to block light from L4. As a result the output of P4
drops. This signal is amplified by an amplifier G4 and coupled by
an isolating diode 170 to an inverter 172 the output of which is
applied to a two-input-AND circuit 174 the other input of which is
provided by invertor 142. The system is so arranged that the motor
58 is reversed if both P1 and P4 are covered at the same time, this
condition indicating that an opaque piece of material longer than
the length of a genuine bill has been inserted in the acceptor. I
so arrange A1 and A4 that the space therebetween is slightly
greater than the length of a genuine dollar bill. I achieve this
result by applying the output of circuit 174 to terminal 160 to
inhibit circuit 158 to prevent the signal from inverter 142 from
being applied to the forward drive section of flip flop 162. At the
same time, a two-input-OR circuit 176 applies the output of AND
circuit 174 to the reversing input terminal of flip flop 162 to
provide a second signal for AND circuit 156 to reverse the motor.
This signal may also be applied to solenoid S through a diode 177
and diode 145 to amplifier 147 to withdraw pressure roller 70.
The system is further arranged so that a genuine bill blocks
aperture A4 at the time the first pulse X1 is being produced at
head H1. As the aperture A4 is blocked, a capacitor C1 discharges
through a resistor 178 to provide an input to an inverter 180 which
provides a second pulse input X1' to the AND circuit 168. It will
be seen that if the inhibiting input X1 to terminal 166 does not
coincide with the X1' input to circuit 168 that circuit applies a
signal to OR circuit 176 which is passed to the flip flop 162 again
to reverse the motor 58. It will be apparent that the spacing
between H1 and P4 is arranged to be equal to the distance between
the leading edge of a genuine bill and the bill area which produces
X1.
Upon further movement of the bill down the passage 18 it moves
between rollers 50 and 52 and vane 138 moves to a position out of
the space between L6 and P6 to cause P6 to produce an output which
is amplified by an amplifier G6 and applied to an inverter 182 to
cause the inverter output to drop to zero. When that occurs, a
capacitor C2 discharges to cause inverter 180 to produce a pulse
X2' which should coincide with pulse X2 if the bill is genuine. If
not, the pulse causes circuit 168 to produce an output to reverse
the motor. The distance between H1 and the nip between rollers 50
and 52 is equal to the distance between the leading edge of a
genuine bill and the bill area which produces the pulse X2'.
As the bill moves out of the passage 18 down through the space
between claws 80 and 88 it enters into the nip between belts 104
and 106 and drums 100 and 102 so as to be carried into engagement
with free wheeling drum 130. The drum now rotates and the magnetic
area of the bill is scanned by head H2 to produce an output on a
channel 184. I apply the signal on channel 184 and the output of
inverter 182 to a two-input-AND circuit 186 which is adapted to
produce an accept or credit signal in response to the concomitant
presence of signals at both of its input terminals. In the case of
a genuine bill, claw 80 is released to permit vane 138 again to
interrupt the light from source L6 at the same time as H2 produces
a signal on channel 184 to cause circuit 186 to provide the accept
signal. It will be appreciated that the distance between the point
at which the trailing edge of a genuine bill releases claw 80 to
permit it to be restored and the head H2 is equal to the distance
between the trailing edge of the bill and the magnetized area which
causes H2 to produce an output.
Finally, if the bill has successfully passed all tests, it is
carried by belts 104 and 106 to a position at which it can drop
into the cash box. If the bill fails the second magnetic check, or
if vane 138 has not been restored by the time the second check is
made, no accept signal is given, the device continues to run to the
end of its cycle and nothing to which a string or long piece of
material is attached can be withdrawn from the system.
It will be seen that I have accomplished the objects of my
invention. I have invented a post validator for a bill acceptor
which overcomes a defect of a bill acceptor known in the prior art.
My post validator prevents generation of an acceptance signal even
in the event that the checks provided by the acceptor have been
dishonestly passed. My post validator requires that a secondary
magnetic check be passed after a bill leaving the acceptor passes
an improved one-way gate.
It will be understood that certain features and subcombinations are
of utility and may be employed without reference to other features
and subcombinations. This is contemplated by and is within the
scope of my claims. It is further obvious that various changes may
be made in details within the scope of my claims without departing
from the spirit of my invention. It is, therefore, to be understood
that my invention is not to be limited to the specific details
shown and described.
* * * * *