US3569935A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Keyboard-controlled multiplex information retrieval system
Assignee: Ultronic Systems Corp
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Filing: 1969-04-30
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Granted: 1971-03-09
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Expires: 1989-04-30
Abstract
Abstract Information, such as stock market transactions, stored in a common memory, is to be displayed visually by a plurality of remotely disposed video monitors. The displays of the various monitors can be totally independent in content, but partial or complete duplication is possible. Each monitor has a keyboard associated therewith whereby the memory can be interrogated for certain specific information to be displayed by the corresponding monitor. To this end, interrogations or requests are supplied sequentially into the memory. The requests are then read out of the memory into a data processor which generates answers. The answers are fed back into the memory and then read out from the memory to the various monitors at which the requests originated.
Inventors
- 👤 Frank W Sieracki
- 👤 Thomas Coombe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:01
CPC Classifications
G; G06; G06F; G06F3/00; G06F3/01; G06F3/02; G06F3/023; G06F3/0232
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
128 words
A system for entering information into a memory comprising: a plurality of keyboard units, each unit when enabled, being controllable by an operator, to enter requests therein in character by character time sequence and to make each such character available in the same sequence for readout; first means coupled to all of said units to enable each unit successively, the timing for a complete enabling cycle for all units being so chosen that an operator cannot successively enter more than one character in any unit during one cycle; second means synchronized with the first means for reading out no more than one character from each unit during each of said cycles; and third means synchronized with the second means for transferring said read out characters into said memory.
Claim 2
Independent Claim
128 words
A system for entering information into a memory comprising: a plurality of keyboard units, each unit when enabled, being controllable by an operator, to enter requests therein in character by character time sequence and to make each such character available in the same sequence for readout; first means coupled to all of said units to enable each unit successively, the timing for a complete enabling cycle for all units being so chosen that an operator cannot successively enter more than one character in any unit during one cycle; second means synchronized with the first means for reading out no more than one character from each unit during each of said cycles; and third means synchronized with the second means for transferring said read out characters into said memory.
Claim 3
Dependent Claim
66 words
A system as set forth in claim 1 wherein each keyboard unit includes a key bank and an encoder, each character appearing in parallel bit format at the output of said encoder, said memory being of the recirculating type wherein the information is in series-bit, series-character format, said system further including a parallel bit to series-bit converter disposed between said second means and said third means.
Claim 4
Dependent Claim
57 words
A system as set forth in claim 2 wherein each unit includes a keyboard enable switch and an enable signal detector for operating said enable switch, the enable switch being disposed between the corresponding encoder and the second means, said first means including a keyboard unit selector enabling switch coupled to each of the enable signal detectors.
Claim 5
Dependent Claim
91 words
A system as set forth in claim 3 wherein each unit includes a depressed key detector, a control circuit and a character readout switch, each character readout switch being disposed between the corresponding keyboard enable switch and the second means and controlled by the corresponding circuit, each key detector being disposed between the corresponding encoder and the corresponding multivibrator, said character read out switch being closed for one complete enabling cycle when a character appears at the output of the encoder and thereafter being open until the next character entry ensues.
Claim 6
Dependent Claim
32 words
A system as set forth in claim 4 wherein said second means includes a keyboard unit selector read out switch coupled between each of the character read out switches and the converter.
Claim 7
Dependent Claim
16 words
A system as set forth in claim 5 wherein said third means includes a recirculation switch.
Claim 8
Dependent Claim
21 words
A system as set forth in claim 1 wherein said first, second and third means are all synchronized by timing signals.
References Cited (Backward Citations)
US3181121A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-08 | 1974-09-07 | 1975-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-08 | 1978-09-07 | 1979-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-08 | 1982-09-07 | 1983-03-09 | $7700.00 | Window Closed / Lapsed |