Patent US3587950A successfully refreshed from Google Patents.
US3587950A
Expired / Lapsed
US
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Control device responsive to a sequential code
Assignee: U.M. Electrical Distributors Ltd
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Filing: 1969-03-21
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Granted: 1971-06-28
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Expires: 1989-03-21
Abstract
Abstract A CONTROL DEVICE COMPRISES FIVE GATE CIRCUITS CONNECTED IN CASCADE. THE GATE CIRCUITS ARE BROUGHT INTO A CONDUCTING PHASE AND A NONCONDUCTING PHASE SEQUENTIALLY BY SEQUENTIALLY APPLIED EXTERNAL PULSES, EACH GATE CIRCUIT BEING BROUGHT INTO THE CONDUCTING PHASE BY ONE OF THE EXTERNAL PULSES ONLY IF THE PRECEDING GATE CIRCUIT IS IN THE CONDUCTING PHASE. THE PRECEDING GATE CIRCUIT SUBSTANTIALLY GOES INTO THIS NONCONDUCTING PHASE. THE ELECTRICAL APPARATUS IS ACTUATED ONLY IF THE GATE CIRCUITS ARE BROUGHT INTO AND OUT OF SAID CONDUCTING PHASE IN A PREDETERMINED SEQUENCE.
Inventors
- 👤 Richard Woolliscroft Haigh
- 👤 Frederick Vincent Commander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:56
CPC Classifications
B; B60; B60R; B60R25/00; B60R25/20; B60R25/23; B60R25/01; B60R25/04; G; G06; G06F; G06F7/00; G06F7/02; G07; G07C; G07C9/00; G07C9/00174; G07C9/00658; G07C9/00674; B60R2025/041
Claims Analysis
Total Claims: 0
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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) | 1974-06-27 | 1974-12-27 | 1975-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-27 | 1978-12-27 | 1979-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-27 | 1982-12-27 | 1983-06-28 | $7700.00 | Window Closed / Lapsed |