U.S. patent number 3,824,465 [Application Number 05/320,892] was granted by the patent office on 1974-07-16 for portable tone decoder-encoder system.
This patent grant is currently assigned to International Mobile Machines Corporation. Invention is credited to Roger D. Blough.
United States Patent |
3,824,465 |
Blough |
July 16, 1974 |
**Please see images for:
( Certificate of Correction ) ** |
PORTABLE TONE DECODER-ENCODER SYSTEM
Abstract
A portable tone decoder-encoder receiver and transmitter device
wherein a radio network is contained in a housing and is
operatively connected to a touch-tone pad also within the housing.
A pivoted hollow handle is connected to the housing and this handle
contains a releasably positioned transmitter and receiver handset
and an antenna, both being operatively connected to the network.
The handle may be moved from a carrying position to an operative
position, and, when in carrying position is releasably locked to
the housing.
Inventors: |
Blough; Roger D. (Willow Grove,
PA) |
Assignee: |
International Mobile Machines
Corporation (Philadelphia, PA)
|
Family
ID: |
23248267 |
Appl.
No.: |
05/320,892 |
Filed: |
January 4, 1973 |
Current U.S.
Class: |
455/90.3;
455/701 |
Current CPC
Class: |
H04B
1/38 (20130101); H04M 1/725 (20130101) |
Current International
Class: |
H04B
1/38 (20060101); H04M 1/72 (20060101); H04M
1/725 (20060101); H04b 001/38 () |
Field of
Search: |
;325/16,21,25,361,352,111,119 ;179/41A,1PC,1C,2DP,84VF,841,2C
;343/175,177,180,181 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Mayer; Albert J.
Attorney, Agent or Firm: Jacobs, Esq.; Arthur A.
Claims
The invention claimed is:
1. A portable receiver and transmitter structural unit comprising a
housing having an open side, a receiver and transmitter radio
network within said housing, a touch tone pad in said housing
operatively connected to said network, and a handle connected to
said housing, said handle being hollow and having an open side,
said handle being pivotally connected at one end thereof to said
housing to permit pivotal movement of said handle into and out of
closed position relative to said open side of said housing, said
open side of said handle being in mating relationship with said
open side of said housing when said handle is in said closed
position, said handle having a latch means at the opposite end
thereof, said latch means being in releasably latched engagement
with said housing when said handle is in said closed position, and
a receiver and transmitter handset releasably positioned within
said hollow handle, said handset being insertable and removable
into and out of said hollow handle through said open side of said
handle.
2. The device of claim 1 wherein a radio-wave antenna is positioned
in said handle and is operatively connected to said network.
3. The device of claim 1 wherein a switch is provided in said
handle, said switch being operatively connected to said network and
being normally closed, and said handset being arranged to open said
switch by contact therewith when said handset is positioned within
said handle.
Description
This invention relates to a portable tone decoder-encoder receiver
and transmitter device, and it particularly relates to a device of
the aforesaid type embodying a duplex system.
Tone receiver and transmitter systems have heretofore generally
been embodied in relatively large, bulky devices which had to be
built into a station or vehicle or had to be carted to the position
where it was to be used. This severely limited the utility of the
device for personal use.
It is one object of the present invention to overcome the above
disadvantages by providing a tone decoder of the duplex type which
is compact, relatively light in weight and adapted for easy
carrying by the user either when traveling, visiting, at the beach
or any other place where the user may be.
Another object of the present invention is to provide a device of
the aforesaid type which is relatively simple in construction and
inexpensive to produce.
Other objects and many of the attendant advantages of this
invention will be readily appreciated as the same becomes better
understood by reference to the following description when read in
conjunction with the accompanying drawings wherein:
FIG. 1 is a side elevational view, partly broken away of a portable
tone decoder device embodying the present invention.
FIG. 2 is a top perspective view of the device of FIG. 1 showing
the handle in retracted position.
Referring now in greater detail to the figures of the drawing
wherein similar reference characters refer to similar parts, there
is shown in FIG. 1 a tone decoder-encoder device, generally
designated 10, comprising a housing 12 and a handle 14. The handle
14 is pivoted to one end of the housing as at 16, whereby the
handle may be hingedly moved from the closed position shown in FIG.
1 to the open position shown in FIG. 2. A latch 18 is provided,
this latch serving to automatically lock the handle in the closed
position but being easily releasable to permit the handle to be
moved into the open position.
Within the housing 12 is a shelf 20 which supports a touch-tone or
push-button pad 22. The pad 22 is of the standard telephone
touch-tone type having a specific number of push-buttons 24. Each
push-button 24 corresponds to a digit and each digit is correlated
with a combination of two particular radio frequencies which are
adapted to be sensed by a data network at a base station where the
frequencies are separated to decode the dialed message, the term
"dialed" being used to denote the operation of the touch-tone pad.
When the base station receives a coded request for information from
the device 10, it transmits the request to a data storage means
such as a computer, and then transmits the information in coded
form back to the device 10, where it is received, automatically
decoded and passed to the user by audio means.
Below the shelf 20 is an encoder-decoder radio network that is
generally designated 26. No attempt is here made to describe this
network in any detail because the network, per se, forms no part of
the present invention except in the disclosed combination. However,
it does include a duplexer usually consisting of a set of tuned
cavities that are capable of passing the receiver frequency through
the unit and, at the same time, permitting the transmitter
frequency to pass through.
The handle 14 is hollow and encased within it is a standard
telephone-type handset 28, including a radio frequency receiver
portion 30 and a radio frequency transmitter portion 32. The
handset is releasably held within the handle 14 by a clip 34. When
held by the clip, the handset pushes the switchbutton 36 inwardly
to maintain the normally closed switch open and the system
inactive. When the handset is removed from the clip 34, it releases
the button 36 to close the switch and activate the system.
The network 26 is connected to the handset by a flexible cable 38
which contains both the line leading from the receiver circuit to
the receiver portion 30 and the line leading from the transmitter
portion of the network to the transmitter portion 32, in the same
manner as a standard telephone device.
The handle 14 is also provided with an antenna 40, this antenna
being connected to the network 26 by a flexible cable 42. The
antenna is automatically placed in fully operative position when
the handle 14 is in the open position as shown in FIG. 2.
The above description clearly shows that the device comprises a
self-contained unit constituting its own carrying case. When the
handle is closed, it can be conveniently carried like a suitcase or
a briefcase. When it is to be used, it is merely necessary to pull
the handle up and the device is ready for instant use.
* * * * *