US3597538A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for transmitting stenotype produced input
Assignee: Individual
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Filing: 1969-04-23
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Granted: 1971-08-03
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Expires: 1989-04-23
Abstract
Abstract Apparatus is provided for the real time communication of data generated by a Stenotype keyboard, a type of data typically represented by the simultaneous actuation of one or more keys. The key actuations are recorded by storage devices, and commutation equipment is activated once for each stenographic character to sample the storage devices sequentially and transmit the information in bit serial form over a data link. The commutating device is started by a control circuit primed when one or more keys are depressed, and subsequently actuated when all such keys are released. At the conclusion of a single commutation cycle, the control circuit stops the commutating device. At the other end of the data link is a decoder which converts the bit serial data transmission back into a form which can be understood by a Stenotype readout device at a remote location.
Inventors
- 👤 Zvi Binenbaum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 00:29
CPC Classifications
H; H04; H04L; H04L13/00; H04L13/02; H04L13/08
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
126 words
Data communication apparatus comprising: a keyboard including a plurality of keys which are actuatable simultaneously to create a data message, and respective switches operable by said keys; respective means responsive to said switches to store said data representing said simultaneous key actuation; a data transmission output line; commutating means for connecting said storage means sequentially to said line to transmit said simultaneous key actuation data in bit serial form; means for starting said commutating means in response to a control sequence comprising said simultaneous actuation of said plurality of keys followed by a release of all of said plurality of keys simultaneously actuated; and means for thereafter stopping said commutating means at the end of a single cycle of commutation covering all of said storage means.
Claim 2
Dependent Claim
126 words
Data communication apparatus comprising: a keyboard including a plurality of keys which are actuatable simultaneously to create a data message, and respective switches operable by said keys; respective means responsive to said switches to store said data representing said simultaneous key actuation; a data transmission output line; commutating means for connecting said storage means sequentially to said line to transmit said simultaneous key actuation data in bit serial form; means for starting said commutating means in response to a control sequence comprising said simultaneous actuation of said plurality of keys followed by a release of all of said plurality of keys simultaneously actuated; and means for thereafter stopping said commutating means at the end of a single cycle of commutation covering all of said storage means.
Claim 3
Dependent Claim
55 words
Apparatus as in claim 1 wherein said commutating means comprises a shift register including at least one stage per storage means, respective means connected to gate said data from said storage means to said line and connected to be enabled by respective shift register stages, and a repetitive pulse source for advancing said shift register.
Claim 4
Dependent Claim
133 words
Apparatus as in claim 2 wherein: said starting means comprises detecting means responsive to the simultaneous actuation of said plurality of keys, means for gating said advancing pulses to said shift register; bistable means for enabling said gating means; latchable means for switching on said bistable means upon unlatching thereof; and means responsive to said detecting means upon the simultaneous actuation of said plurality of keys to latch said latchable means, and responsive to said detecting means upon the subsequent release of all of said simultaneously actuated keys to unlatch said latchable means whereby to switch on said bistable means, thereby enabling said gating means and advancing said shift register; and said stopping means is responsive to the termination of a commutation cycle of said shift register to switch off said bistable means.
Claim 5
Dependent Claim
91 words
Apparatus as in claim 1 wherein: said commutation means comprises a rotating mechanical device, and means for driving said device; said starting means comprises first and second switches in series for operating said driving means, means for latching said first switch closed in response to the simultaneous actuation of said plurality of keys, and means for closing said second switch in response to the subsequent release of all of said simultaneously actuated keys; and said stopping means comprises means for unlatching said first switch at the termination of a commutating cycle.
Claim 6
Dependent Claim
146 words
Data communication apparatus comprising: a keyboard including a plurality of keys which are actuatable simultaneously to create a data message, and respective switches operable by said keys; respective means responsive to said switches to store said data representing said simultaneous key actuation; a data transmission output line; commutating means for connecting said storage means sequentially to said line to transmit at least a portion of said simultaneous key actuation data in bit serial form; means for starting said commutation means in response to a control sequence comprising said simultaneous actuation of said plurality of keys followed by a release of at least a portion of said simultaneously actuated keys; and means for thereafter stopping said commutating means at the end of a single cycle of commutation covering the portion of said storage means associated with at least the last mentioned portion of said simultaneously actuated keys.
Claim 7
Dependent Claim
146 words
Data communication apparatus comprising: a keyboard including a plurality of keys which are actuatable simultaneously to create a data message, and respective switches operable by said keys; respective means responsive to said switches to store said data representing said simultaneous key actuation; a data transmission output line; commutating means for connecting said storage means sequentially to said line to transmit at least a portion of said simultaneous key actuation data in bit serial form; means for starting said commutation means in response to a control sequence comprising said simultaneous actuation of said plurality of keys followed by a release of at least a portion of said simultaneously actuated keys; and means for thereafter stopping said commutating means at the end of a single cycle of commutation covering the portion of said storage means associated with at least the last mentioned portion of said simultaneously actuated keys.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-02 | 1975-02-01 | 1975-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-02 | 1979-02-01 | 1979-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-02 | 1983-02-01 | 1983-08-03 | $7700.00 | Window Closed / Lapsed |