US3689708A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Step-by-step pulse transmitter
Assignee: STC PLC
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Filing: 1970-03-03
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Granted: 1972-09-05
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Expires: 1990-03-03
Abstract
Abstract An adaptor unit for a voice operated typewriter employing morse code to provide a voice operated hands free telephone dialling facility. The unit consists of a four-bit counter interconnected with a multi-vibrator so that the counter is incremented by each pulse generated by the multi-vibrator and so that the multivibrator is held off when the count is zero. When a number is written into the counter from the voice operated typewriter employing morse code, the multi-vibrator is enabled to generate the requisite number of pulses needed to restore the count to zero.
Inventors
- 👤 Christopher Darius Nabavi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:56
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/78; H04; H04M; H04M1/00; H04M1/26; H04M1/27; H04M1/271
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
172 words
A pulse transmitter comprising a counter, a pulse generator and a gate circuit, means coupling said gate circuit between said counter and said pulse generator, said gate remaining ''''off'''' when potentials representing a predetermined number are present in said counter, said counter including means to receive potentials representing numbers from another source, said gate circuit responding to potentials representing any other number in said counter to provide signals to energize said pulse generator, means coupling pulses from said pulse generator to an input terminal of said counter to step the counter until its count is restored to the predetermined number, the pulse transmitter being interconnected with a set of bistables by a data switch arranged such that a pattern of states of the bistables can be transferred into the individual storage elements of the counter by the operation of the switch, and further including interlocking means for preventing the transference of a number into the counter which would be such as to cause the pulse transmitter to generate more than ten pulses.
Claim 2
Dependent Claim
172 words
A pulse transmitter comprising a counter, a pulse generator and a gate circuit, means coupling said gate circuit between said counter and said pulse generator, said gate remaining ''''off'''' when potentials representing a predetermined number are present in said counter, said counter including means to receive potentials representing numbers from another source, said gate circuit responding to potentials representing any other number in said counter to provide signals to energize said pulse generator, means coupling pulses from said pulse generator to an input terminal of said counter to step the counter until its count is restored to the predetermined number, the pulse transmitter being interconnected with a set of bistables by a data switch arranged such that a pattern of states of the bistables can be transferred into the individual storage elements of the counter by the operation of the switch, and further including interlocking means for preventing the transference of a number into the counter which would be such as to cause the pulse transmitter to generate more than ten pulses.
Claim 3
Dependent Claim
188 words
A pulse transmitter comprising a counter, a pulse generator and a gate circuit, means coupling said gate circuit between said counter and said pulse generator, said gate remaining ''''off'''' when potentials representing a predetermined number are present in said counter, said counter including means to receive potentials representing numbers from another source, said gate circuit responding to potentials representing any other number in said counter to provide signals to energize said pulse generator, means coupling pulses from said pulse generator to an input terminal of said counter to step the counter until its count is restored to the predetermined number, the pulse transmitter being interconnected with a set of bistables by a data switch arranged such that a pattern of states of the bistables can be transferred into the individual storage elements of the counter by the operation of the switch, and further including a code converter for converting a variable length serial code into a fixed length parallel code part of which code converter is formed by the set of bistables, and a code element discriminator whose output is fed to the input of the code converter.
Claim 4
Dependent Claim
188 words
A pulse transmitter comprising a counter, a pulse generator and a gate circuit, means coupling said gate circuit between said counter and said pulse generator, said gate remaining ''''off'''' when potentials representing a predetermined number are present in said counter, said counter including means to receive potentials representing numbers from another source, said gate circuit responding to potentials representing any other number in said counter to provide signals to energize said pulse generator, means coupling pulses from said pulse generator to an input terminal of said counter to step the counter until its count is restored to the predetermined number, the pulse transmitter being interconnected with a set of bistables by a data switch arranged such that a pattern of states of the bistables can be transferred into the individual storage elements of the counter by the operation of the switch, and further including a code converter for converting a variable length serial code into a fixed length parallel code part of which code converter is formed by the set of bistables, and a code element discriminator whose output is fed to the input of the code converter.
Claim 5
Dependent Claim
17 words
The combination as claimed in claim 1 wherein the bistables are interconnected to form a shift register.
Claim 6
Dependent Claim
12 words
A telephone subset including pulse generating apparatus as claimed in claim 2.
Claim 7
Dependent Claim
28 words
Pulse generating apparatus as claimed in claim 2 wherein the code element discriminator is constructed to distinguish between three code element types in accordance with prescribed signal lengths.
Claim 8
Dependent Claim
38 words
A pulse transmitter as claimed in claim 1 in which the gate circuit includes an OR gate and said OR gate is responsive to potentials in said counter representing digits other than zero to energize said pulse generator.
Claim 9
Dependent Claim
30 words
A pulse transmitter as claimed in claim 6, in which the predetermined number is zero, and the pulses from the pulse generator step the counter until its count is zero.
Claim 10
Dependent Claim
73 words
A pulse transmitter as claimed in claim 1, in which the predetermined number is zero, the counter is a four-bit binary counter responsive to receive input signals in parallel to set each bit in said counter to a particular numerical value, the gate circuit is an OR gate made conductive in response to potentials in said counter representing said particular numerical value, and the pulse generator steps the counter to the predetermined number.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-05 | 1976-03-06 | 1976-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-05 | 1980-03-06 | 1980-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-05 | 1984-03-06 | 1984-09-05 | $7700.00 | Window Closed / Lapsed |