Patent US3161759A successfully refreshed from Google Patents.
US3161759A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric range heater control
Assignee: Motors Liquidation Co
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Filing: 1961-12-21
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Granted: 1964-12-15
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Expires: 1981-12-21
Abstract
No abstract record available.
Inventors
- 👤 Charles C Gambill
- 👤 Alfred B Roby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:53
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/19; G05D23/20; G05D23/24; G05D23/1906; G05D23/1913
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
INCOMBINATION, AN ELECTRICAL LOAD, ALTERNATING CURRENT SUPPLY CONDUCTORS ELECTRICALLY CONNECTED TO SAID ELECTRICAL LOAD, A SILICON CONTROLLED RECTIFIER CONNECTED IN SERIES WITH SAID LOAD FOR CONTROLLING SAID LOAD AND HAVING A GATE, A BRIDGE CIRCUIT HAVING INPUT TERMINALS ELECTRICALLY ENERGIZED FROM SAID SUPPLY CONDUCTORS AND HAVING OUTPUT TERMINALS, FIRST AND SECOND RESISTANCES CONNECTED BETWEEN AN INPUT TERMINAL AND AN OUTPUT TERMINAL OF SAID BRIDGE CIRCUIT, MEANS RESPONSIVE TO THE CURRENT FLOW THROUGH SAID ELECTRICAL LOAD FOR GRADUALLY VARYING THE RESISTANCE OF SAID SECOND RESISTANCE, MEANS INCLUDING SEMICONDUCTOR AMPLIFYING MEANS CONNECTED TO THE OUTPUT OF SAID BRIDGE CIRCUIT FOR CONTROLLING THE VOLTAGE APPLIED TO SAID GATE, AND MEANS FOR GRADUALLY VARYING THE RESISTANCE OF SAID FIRST RESISTANCE TO GRADUALLY VARY THE OUTPUT OF SAID ELECTRICAL LOAD.
Claim 2
Dependent Claim
125 words
INCOMBINATION, AN ELECTRICAL LOAD, ALTERNATING CURRENT SUPPLY CONDUCTORS ELECTRICALLY CONNECTED TO SAID ELECTRICAL LOAD, A SILICON CONTROLLED RECTIFIER CONNECTED IN SERIES WITH SAID LOAD FOR CONTROLLING SAID LOAD AND HAVING A GATE, A BRIDGE CIRCUIT HAVING INPUT TERMINALS ELECTRICALLY ENERGIZED FROM SAID SUPPLY CONDUCTORS AND HAVING OUTPUT TERMINALS, FIRST AND SECOND RESISTANCES CONNECTED BETWEEN AN INPUT TERMINAL AND AN OUTPUT TERMINAL OF SAID BRIDGE CIRCUIT, MEANS RESPONSIVE TO THE CURRENT FLOW THROUGH SAID ELECTRICAL LOAD FOR GRADUALLY VARYING THE RESISTANCE OF SAID SECOND RESISTANCE, MEANS INCLUDING SEMICONDUCTOR AMPLIFYING MEANS CONNECTED TO THE OUTPUT OF SAID BRIDGE CIRCUIT FOR CONTROLLING THE VOLTAGE APPLIED TO SAID GATE, AND MEANS FOR GRADUALLY VARYING THE RESISTANCE OF SAID FIRST RESISTANCE TO GRADUALLY VARY THE OUTPUT OF SAID ELECTRICAL LOAD.
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) | 1967-12-15 | 1968-06-15 | 1968-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-12-15 | 1972-06-15 | 1972-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-12-15 | 1976-06-15 | 1976-12-15 | $7700.00 | Window Closed / Lapsed |