US3151280A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Snap-acting photoelectric relay
Assignee: CTS of Canada Ltd
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Filing: 1961-10-26
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Granted: 1964-09-29
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Expires: 1981-10-26
Abstract
No abstract record available.
Inventors
- 👤 Robert W Naylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:25
CPC Classifications
H; H01; H01H; H01H47/00; H01H47/22; H01H47/24; H05; H05B; H05B47/00; H05B47/10; H05B47/105; H05B47/11; Y; Y02; Y02B; Y02B20/00; Y02B20/40
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
130 words
IN A CONTROL SYSTEM, THE COMBINATION OF AN ELECTRICAL DEVICE TO BE CONTROLLED, A RELAY, A PHOTOCONDUCTIVE CELL, CONNECTED IN SERIES WITH THE RELAY AND SUBJECT TO A VARYING LIGHT INTENSITY, FOR CONTROLLING THE ENERGIZATION OF THE RELAY, THE RELAY AND THE CELL BEING CONNECTED ACROSS A SOURCE OF VOLTAGE, AND AN AUXILIARY LIGHT SOURCE CONNECTED IN SERIES WITH THE PHOTOCONDUCTIVE CELL AND IN PARALLEL WITH THE RELAY AND PHYSICALLY ARRANGED TO IRRADIATE THE PHOTOCONDUCTIVE CELL WHEREBY UPON INCREASING THE INTENSITY OF THE LIGHT IRRADIATING AGAINST THE PHOTOCONDUCTIVE CELL THE AUXILIARY LIGHT BECOMES CONDUCTIVE AND INSTANTANEOUSLY INCREASES THE AMOUNT OF LIGHT IRRADIATING AGAINST THE PHOTOCONDUCTIVE CELL THEREBY INCREASING THE CURRENT THROUGH THE RELAY FOR RAPIDLY OPENING A PAIR OF CONTACTS TO DISCONNECT THE ELECTRICAL DEVICE FROM THE SOURCE OF VOLTAGE.
Claim 2
Dependent Claim
130 words
IN A CONTROL SYSTEM, THE COMBINATION OF AN ELECTRICAL DEVICE TO BE CONTROLLED, A RELAY, A PHOTOCONDUCTIVE CELL, CONNECTED IN SERIES WITH THE RELAY AND SUBJECT TO A VARYING LIGHT INTENSITY, FOR CONTROLLING THE ENERGIZATION OF THE RELAY, THE RELAY AND THE CELL BEING CONNECTED ACROSS A SOURCE OF VOLTAGE, AND AN AUXILIARY LIGHT SOURCE CONNECTED IN SERIES WITH THE PHOTOCONDUCTIVE CELL AND IN PARALLEL WITH THE RELAY AND PHYSICALLY ARRANGED TO IRRADIATE THE PHOTOCONDUCTIVE CELL WHEREBY UPON INCREASING THE INTENSITY OF THE LIGHT IRRADIATING AGAINST THE PHOTOCONDUCTIVE CELL THE AUXILIARY LIGHT BECOMES CONDUCTIVE AND INSTANTANEOUSLY INCREASES THE AMOUNT OF LIGHT IRRADIATING AGAINST THE PHOTOCONDUCTIVE CELL THEREBY INCREASING THE CURRENT THROUGH THE RELAY FOR RAPIDLY OPENING A PAIR OF CONTACTS TO DISCONNECT THE ELECTRICAL DEVICE FROM THE SOURCE OF VOLTAGE.
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) | 1967-09-29 | 1968-03-30 | 1968-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-29 | 1972-03-30 | 1972-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-29 | 1976-03-30 | 1976-09-29 | $7700.00 | Window Closed / Lapsed |