US3418480A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lighting control circuit employing photocells and gas diodes to operate semiconductor switches
Assignee: Individual
•
Filing: 1965-10-19
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Granted: 1968-12-24
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Expires: 1985-10-19
Abstract
No abstract record available.
Inventors
- 👤 Kenneth H Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:03
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/51; H03K17/78; H03K17/79; 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
144 words
A CONTROL CIRCUIT FOR CONTROLLING THE ELECTRICAL POWER SUPPLIED TO A LOAD FROM A SOURCE OF AC VOLTAGE, COMPRISING: (A) OPTICAL RADIATION SOURCE MEANS FOR BEING CONNECTED ACROSS SAID SOURCE OF AC VOLTAGE ACTIVATED RESPONSIVE TO A MINIMUM THRESHOLD VOLTAGE APPLIED THEREACROSS, (B) SWITCH MEANS HAVING CONDUCTION ELECTRODES FOR BEING CONNECTED IN SERIES WITH SAID SOURCE OF AC VOLTAGE AND SAID LOAD, (C) FIRST OPTICAL RADIATION SENSITIVE MEANS OPTICALLY COUPLED TO SAID OPTICAL RADIATION SOURCE MEANS AND CONNECTED TO SAID SWITCH MEANS FOR CAUSING SAID SWITCH MEANS TO CONDUCT RESPONSIVE TO OPTICAL RADIATION INCIDENT THEREON FROM SAID OPTICAL RADIATION SOURCE MEANS, AND (D) SECOND OPTICAL RADIATION SENSITIVE MEANS CONNECTED IN ELECTRICAL SHUNTING RELATION WITH SAID OPTICAL RADIATION SOURCE MEANS FOR CONTROLLING THE VOLTAGE APPLIED ACROSS SAID OPTICAL SOURCE MEANS FROM SAID SOURCE OF AC VOLTAGE AS A FUNCTION OF THE OPTICAL RADIATION INCIDENT THEREON.
Claim 2
Dependent Claim
144 words
A CONTROL CIRCUIT FOR CONTROLLING THE ELECTRICAL POWER SUPPLIED TO A LOAD FROM A SOURCE OF AC VOLTAGE, COMPRISING: (A) OPTICAL RADIATION SOURCE MEANS FOR BEING CONNECTED ACROSS SAID SOURCE OF AC VOLTAGE ACTIVATED RESPONSIVE TO A MINIMUM THRESHOLD VOLTAGE APPLIED THEREACROSS, (B) SWITCH MEANS HAVING CONDUCTION ELECTRODES FOR BEING CONNECTED IN SERIES WITH SAID SOURCE OF AC VOLTAGE AND SAID LOAD, (C) FIRST OPTICAL RADIATION SENSITIVE MEANS OPTICALLY COUPLED TO SAID OPTICAL RADIATION SOURCE MEANS AND CONNECTED TO SAID SWITCH MEANS FOR CAUSING SAID SWITCH MEANS TO CONDUCT RESPONSIVE TO OPTICAL RADIATION INCIDENT THEREON FROM SAID OPTICAL RADIATION SOURCE MEANS, AND (D) SECOND OPTICAL RADIATION SENSITIVE MEANS CONNECTED IN ELECTRICAL SHUNTING RELATION WITH SAID OPTICAL RADIATION SOURCE MEANS FOR CONTROLLING THE VOLTAGE APPLIED ACROSS SAID OPTICAL SOURCE MEANS FROM SAID SOURCE OF AC VOLTAGE AS A FUNCTION OF THE OPTICAL RADIATION INCIDENT THEREON.
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) | 1971-12-24 | 1972-06-24 | 1972-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-24 | 1976-06-24 | 1976-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-24 | 1980-06-24 | 1980-12-24 | $7700.00 | Window Closed / Lapsed |