US3108167A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermal timer switch
Assignee: Essex Wire Corp
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Filing: 1960-06-24
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Granted: 1963-10-22
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Expires: 1980-06-24
Abstract
No abstract record available.
Inventors
- 👤 Robert E Prouty
- 👤 Robert L Baker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:04
CPC Classifications
H; H01; H01H; H01H43/00; H01H43/30; H01H43/301; H01H43/302; H01H43/304
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
178 words
IN A THERMAL TIMER SWITCH, THE COMBINATION COMPRISING: SUPPORTING MEANS; AN ACTUATOR BIMETAL MEMBER AND A COMPENSATOR BIMETAL MEMBER EACH OF STRIP FORM AND SUPPORTED AT ONE END OF SAID SUPPORTING MEANS; A FIRST CONTACT CARRIED ON THE FREE END OF SAID ACTUATOR BIMETAL MEMBER AND A SECOND CONTACT CARRIED ON THE FREE END OF SAID COMPENSATOR BIMETAL MEMBER FOR COOPERATION WITH SAID FIRST CONTACT; SAID COMPENSATOR BIMETAL MEMBER BEING ARRANGED TO MOVE IN THE SAME DIRECTION AS SAID ACTUATOR BIMETAL MEMBER WITH CHANGES IN AMBIENT TEMPERATURE; AN ELECTRIC HEATING ELEMENT DISPOSED IN PROXIMITY WITH ONLY SAID ACTUATOR BIMETAL MEMBER FOR HEATIANG ONLY SAID ACTUATOR BIMETAL MEMBER; A CASE ENCLOSING SAID BIMETAL MEMBERS AND SAID HEATING ELEMENT; AN ELECTRICAL RESISTOR SUPPORTED UPON THE OUTSIDE OF SAID CASE AND ELECTRICALLY CONNECTED IN SERIES WITH SAID HEATING ELEMENT; SAID BIMETAL MEMBERS BEING SHIELDED FROM SAID RESISTOR BY SAID CASE; SAID HEATING ELEMENT BEING FORMED OF RESISTANCE MATERIAL WHOSE RESISTANCE VALUE VARIES INVERSELY WITH A CHANGE IN VOLTAGE IMPRESSED ACROSS SAID HEATING ELEMENT DUE DIRECTLY TO THE VOLTAGE GRADIENT EXISTING THEREIN.
Claim 2
Dependent Claim
178 words
IN A THERMAL TIMER SWITCH, THE COMBINATION COMPRISING: SUPPORTING MEANS; AN ACTUATOR BIMETAL MEMBER AND A COMPENSATOR BIMETAL MEMBER EACH OF STRIP FORM AND SUPPORTED AT ONE END OF SAID SUPPORTING MEANS; A FIRST CONTACT CARRIED ON THE FREE END OF SAID ACTUATOR BIMETAL MEMBER AND A SECOND CONTACT CARRIED ON THE FREE END OF SAID COMPENSATOR BIMETAL MEMBER FOR COOPERATION WITH SAID FIRST CONTACT; SAID COMPENSATOR BIMETAL MEMBER BEING ARRANGED TO MOVE IN THE SAME DIRECTION AS SAID ACTUATOR BIMETAL MEMBER WITH CHANGES IN AMBIENT TEMPERATURE; AN ELECTRIC HEATING ELEMENT DISPOSED IN PROXIMITY WITH ONLY SAID ACTUATOR BIMETAL MEMBER FOR HEATIANG ONLY SAID ACTUATOR BIMETAL MEMBER; A CASE ENCLOSING SAID BIMETAL MEMBERS AND SAID HEATING ELEMENT; AN ELECTRICAL RESISTOR SUPPORTED UPON THE OUTSIDE OF SAID CASE AND ELECTRICALLY CONNECTED IN SERIES WITH SAID HEATING ELEMENT; SAID BIMETAL MEMBERS BEING SHIELDED FROM SAID RESISTOR BY SAID CASE; SAID HEATING ELEMENT BEING FORMED OF RESISTANCE MATERIAL WHOSE RESISTANCE VALUE VARIES INVERSELY WITH A CHANGE IN VOLTAGE IMPRESSED ACROSS SAID HEATING ELEMENT DUE DIRECTLY TO THE VOLTAGE GRADIENT EXISTING THEREIN.
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) | 1966-10-21 | 1967-04-22 | 1967-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-10-21 | 1971-04-22 | 1971-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-10-21 | 1975-04-22 | 1975-10-22 | $7700.00 | Window Closed / Lapsed |