Patent DE249631C successfully refreshed from Google Patents.
US3293369A
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Conference communications system employing time division multiplex
Assignee: International Business Machines Corp
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Filing: 1963-12-20
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Granted: 1966-12-20
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Expires: 1983-12-20
Abstract
No abstract record available.
Inventors
- 👤 Eugene N Schroeder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:44
CPC Classifications
H; H04; H04M; H04M3/00; H04M3/42; H04M3/56; H04M3/561; H04J; H04J3/00; H04Q; H04Q11/00; H04Q11/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
173 words
A CONFERENCE CONNECTION SYSTEM FOR USE IN A TIME MULTIPLEXED SWITCHING SYSTEM, COMPRISING: A PLURALITY OF INPUT CIRCUITS ADATPED TO PROVIDE ANALOG SIGNALS; A CONFERENCE HIGHWAY; A PLURALITY OF FIRST TIME GATES, ONE FOR EACH INPUT CIRCUIT, CONNECTING SAID INPUT CIRCUIT TO SAID CONFERENCE HIGHWAY; A SECOND PLURALITY OF TIME GATES CONNECTED TO SAID CONFERENCE HIGHWAY; A PLURALITY OF CONFERENCE BOXES, EACH CONNECTED THROUGH ONE OF SAID SECOND PLURALITY OF TIME GATES, TO SAID CONFERENCE HIGHWAY, WHEREBY UPON THE SIMULTANEOUS CLOSURE OF ONE OF THE TIME GATES OF EACH OF SAID FIRST AND SAID SECOND PLURALITY OF TIME GATES, THE ANALOG SIGNAL FROM ONE OF SAID INPUT CIRCUITS IS SAMPLED AND PROVIDED TO ONE OF SAID CONFERENCE BOXES AS A PULSE AMPLITUDE SAMPLE; MEANS IN EACH OF SAID CONFERENCE BOXES FOR MAINTAINING THE IMPLITUDE OF SAID SAMPLE AS A CONSTANT LEVEL SIGNAL FOR A PREDETERMINED DURATION SUBSEQUENT TO THE RECEPTION OF A PULSE AMPLITUDE SAMPLE; AND MEANS FOR PROVIDING SAID CONSTANT LEVEL SIGNAL AS A CONFERENCE INPUT TO SAID TIME MULTIPLEXED SWITCHING SYSTEM.
Claim 2
Dependent Claim
173 words
A CONFERENCE CONNECTION SYSTEM FOR USE IN A TIME MULTIPLEXED SWITCHING SYSTEM, COMPRISING: A PLURALITY OF INPUT CIRCUITS ADATPED TO PROVIDE ANALOG SIGNALS; A CONFERENCE HIGHWAY; A PLURALITY OF FIRST TIME GATES, ONE FOR EACH INPUT CIRCUIT, CONNECTING SAID INPUT CIRCUIT TO SAID CONFERENCE HIGHWAY; A SECOND PLURALITY OF TIME GATES CONNECTED TO SAID CONFERENCE HIGHWAY; A PLURALITY OF CONFERENCE BOXES, EACH CONNECTED THROUGH ONE OF SAID SECOND PLURALITY OF TIME GATES, TO SAID CONFERENCE HIGHWAY, WHEREBY UPON THE SIMULTANEOUS CLOSURE OF ONE OF THE TIME GATES OF EACH OF SAID FIRST AND SAID SECOND PLURALITY OF TIME GATES, THE ANALOG SIGNAL FROM ONE OF SAID INPUT CIRCUITS IS SAMPLED AND PROVIDED TO ONE OF SAID CONFERENCE BOXES AS A PULSE AMPLITUDE SAMPLE; MEANS IN EACH OF SAID CONFERENCE BOXES FOR MAINTAINING THE IMPLITUDE OF SAID SAMPLE AS A CONSTANT LEVEL SIGNAL FOR A PREDETERMINED DURATION SUBSEQUENT TO THE RECEPTION OF A PULSE AMPLITUDE SAMPLE; AND MEANS FOR PROVIDING SAID CONSTANT LEVEL SIGNAL AS A CONFERENCE INPUT TO SAID TIME MULTIPLEXED SWITCHING SYSTEM.
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) | 1969-12-19 | 1970-06-20 | 1970-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-19 | 1974-06-20 | 1974-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-19 | 1978-06-20 | 1978-12-20 | $7700.00 | Window Closed / Lapsed |