Patent US3262356A successfully refreshed from Google Patents.
US3262356A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Line voltage compensating timer
Assignee: University of Minnesota Twin Cities
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Filing: 1963-04-10
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Granted: 1966-07-26
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Expires: 1983-04-10
Abstract
No abstract record available.
Inventors
- 👤 Fred F Forbes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 19:16
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/28; H03K17/288; G; G01; G01J; G01J1/00; G01J1/42; G01J1/4209; G01J1/4223
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
238 words
AN APPARATUS FOR CONTROLLING THE TIME INTERVAL THAT ELECTRICAL POWER IS AVAILABLE TO A LOAD BY MONITORING THE LINE VOLTAGE BY MEANS OF GENERATING LIGHT DIRECTLY FROM THE LINE VOLTAGE SOURCE AND COUPLING THAT LIGHT TO A LIGHT RESPONSIVE MEANS WHOSE IMPEDANCE IS A FUNCTION OF THE VARIATION IN LINE VOLTAGE, SAID APPARATUS COMPRISING IN COMBINATION; A CURRENT CONTROLLING DEVICE HAVING A CONTROL ELEMENT THEREIN, A VOLTAGE IMPRESSED UPON SAID CONTROL ELEMENT BEING ADAPTED TO VARY THE IMPEDANCE OF SAID CURRENT CONTROLLING DEVICE; A LIGHT SOURCE OPERATIVELY CONNECTED TO SAID CURRENT CONTROLLING DEVICE; A SOURCE OF ELECTRIC CURRENT CONNECTED TO SAID CURRENT CONTROLLING DEVICE; SAID LIGHT SOURCE GENERATING LIGHT DIRECTLY FROM THE LINE VOLTAGE SOURCE; A CONDENSER CHARGING CIRCUIT INCLUDING A TIMING CONDENSER AND A LIGHT RESPONSIVE MEANS CONDUCTIVELY CONNECTED TO SAID TIMING CONDENSER, CONDUCTOR MEANS BETWEEN SAID CONDENSER CHARGING CIRCUIT AND SAID CONTROL ELEMENT, SAID LIGHT RESPONSIVE MEANS BEING POSITIONED TO RECEIVE LIGHT FROM SAID LIGHT SOURCE, THE IMPEDANCE OF SAID LIGHT RESPONSIVE MEANS BEING DEPENDENT UPON THE ITENSITY OF THE LIGHT INCIDENT THERETO FROM SAID LIGHT SOURCE AND A FUNCTION OF VARIATION IN LINE VOLTAGE, A SOURCE OF ELECTRICAL CURRENT CONNECTED TO SAID CONDENSER CHANGING CIRCUIT TO FACILITATE THE CHARGING OF SAID TIMING CONDENSER, WHEREBY THE TIME OF CHARGING SAID CONDENSER VARIES WITH THE CHANGE OF IMPEDANCE OF SAID LIGHT RESPONSIVE MEANS AS A FUNCTION OF THE AMOUNT OF LIGHT RECEIVED THEREBY FROM SAID LIGHT SOURCE.
Claim 2
Independent Claim
238 words
AN APPARATUS FOR CONTROLLING THE TIME INTERVAL THAT ELECTRICAL POWER IS AVAILABLE TO A LOAD BY MONITORING THE LINE VOLTAGE BY MEANS OF GENERATING LIGHT DIRECTLY FROM THE LINE VOLTAGE SOURCE AND COUPLING THAT LIGHT TO A LIGHT RESPONSIVE MEANS WHOSE IMPEDANCE IS A FUNCTION OF THE VARIATION IN LINE VOLTAGE, SAID APPARATUS COMPRISING IN COMBINATION; A CURRENT CONTROLLING DEVICE HAVING A CONTROL ELEMENT THEREIN, A VOLTAGE IMPRESSED UPON SAID CONTROL ELEMENT BEING ADAPTED TO VARY THE IMPEDANCE OF SAID CURRENT CONTROLLING DEVICE; A LIGHT SOURCE OPERATIVELY CONNECTED TO SAID CURRENT CONTROLLING DEVICE; A SOURCE OF ELECTRIC CURRENT CONNECTED TO SAID CURRENT CONTROLLING DEVICE; SAID LIGHT SOURCE GENERATING LIGHT DIRECTLY FROM THE LINE VOLTAGE SOURCE; A CONDENSER CHARGING CIRCUIT INCLUDING A TIMING CONDENSER AND A LIGHT RESPONSIVE MEANS CONDUCTIVELY CONNECTED TO SAID TIMING CONDENSER, CONDUCTOR MEANS BETWEEN SAID CONDENSER CHARGING CIRCUIT AND SAID CONTROL ELEMENT, SAID LIGHT RESPONSIVE MEANS BEING POSITIONED TO RECEIVE LIGHT FROM SAID LIGHT SOURCE, THE IMPEDANCE OF SAID LIGHT RESPONSIVE MEANS BEING DEPENDENT UPON THE ITENSITY OF THE LIGHT INCIDENT THERETO FROM SAID LIGHT SOURCE AND A FUNCTION OF VARIATION IN LINE VOLTAGE, A SOURCE OF ELECTRICAL CURRENT CONNECTED TO SAID CONDENSER CHANGING CIRCUIT TO FACILITATE THE CHARGING OF SAID TIMING CONDENSER, WHEREBY THE TIME OF CHARGING SAID CONDENSER VARIES WITH THE CHANGE OF IMPEDANCE OF SAID LIGHT RESPONSIVE MEANS AS A FUNCTION OF THE AMOUNT OF LIGHT RECEIVED THEREBY FROM SAID LIGHT SOURCE.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-07-25 | 1970-01-24 | 1970-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-25 | 1974-01-24 | 1974-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-25 | 1978-01-24 | 1978-07-26 | $7700.00 | Window Closed / Lapsed |