Patent FR977799A successfully refreshed from Google Patents.
US3158758A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Switch apparatus
Assignee: Unisys Corp
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Filing: 1962-05-14
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Granted: 1964-11-24
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Expires: 1982-05-14
Abstract
No abstract record available.
Inventors
- 👤 Jr Paul E Pearson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:25
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/51; H03K17/56; H03K17/72; H03K17/73
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
157 words
AN ELECTRONIC SWITCH COMPRISING CIRCUIT MEANS FOR PASSING AN APPLIED SIGNAL CONTINUOUSLY AFTER APPLICATION THERETO OF A CERTAIN SIGNAL LEVEL AND UNTIL THE CONDUCTION OF SAID SIGNAL THROUGH SAID CIRCUIT MEANS IS INTERRUPTED, MEANS FOR PRODUCING AND APPLYING TO SAID CIRCUIT MEANS A SIGNAL LEVEL PROPORTIONAL TO THE DIFFERENCE BETWEEN TWO SIGNALS APPLIED THERETO, MEANS FOR STORING FOR A PREDETERMINED TIME A SIGNAL REPRESENTATIVE OF THE INSTANTANEOUS OUTPUT SIGNAL FROM SAID CIRCUIT MEANS, SWITCH MEANS FOR APPLYING ON ACTUATION A SIGNAL REPRESENTATIVE OF THE INPUT SIGNAL TO SAID CIRCUIT MEANS TO SAID MEANS FOR PRODUCING A SIGNAL LEVEL, SAID SWITCH MEANS BEING CONNECTED TO A CLOSED SERIES CIRCUIT WITH SAID CIRCUIT MEANS ONLY WHEN NOT ACTUATED, SAID MEANS FOR PRODUCING A SIGNAL LEVEL RECEIVING CONTINUALLY THE SIGNAL STORED BY SAID SIGNAL STORING MEANS PRODUCING A SIGNAL LEVEL REPRESENTING THE DIFFERENCE BETWEEN THE STORED SIGNAL SUBTRACTED FROM THE SIGNAL REPRESENTATIVE OF THE INPUT SIGNAL TO SAID CIRCUIT MEANS.
Claim 2
Dependent Claim
157 words
AN ELECTRONIC SWITCH COMPRISING CIRCUIT MEANS FOR PASSING AN APPLIED SIGNAL CONTINUOUSLY AFTER APPLICATION THERETO OF A CERTAIN SIGNAL LEVEL AND UNTIL THE CONDUCTION OF SAID SIGNAL THROUGH SAID CIRCUIT MEANS IS INTERRUPTED, MEANS FOR PRODUCING AND APPLYING TO SAID CIRCUIT MEANS A SIGNAL LEVEL PROPORTIONAL TO THE DIFFERENCE BETWEEN TWO SIGNALS APPLIED THERETO, MEANS FOR STORING FOR A PREDETERMINED TIME A SIGNAL REPRESENTATIVE OF THE INSTANTANEOUS OUTPUT SIGNAL FROM SAID CIRCUIT MEANS, SWITCH MEANS FOR APPLYING ON ACTUATION A SIGNAL REPRESENTATIVE OF THE INPUT SIGNAL TO SAID CIRCUIT MEANS TO SAID MEANS FOR PRODUCING A SIGNAL LEVEL, SAID SWITCH MEANS BEING CONNECTED TO A CLOSED SERIES CIRCUIT WITH SAID CIRCUIT MEANS ONLY WHEN NOT ACTUATED, SAID MEANS FOR PRODUCING A SIGNAL LEVEL RECEIVING CONTINUALLY THE SIGNAL STORED BY SAID SIGNAL STORING MEANS PRODUCING A SIGNAL LEVEL REPRESENTING THE DIFFERENCE BETWEEN THE STORED SIGNAL SUBTRACTED FROM THE SIGNAL REPRESENTATIVE OF THE INPUT SIGNAL TO SAID CIRCUIT MEANS.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-11-24 | 1968-05-25 | 1968-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-24 | 1972-05-25 | 1972-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-24 | 1976-05-25 | 1976-11-24 | $7700.00 | Window Closed / Lapsed |