Patent US3138737A successfully refreshed from Google Patents.
US3138737A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Switching means for a load circuit with an auxiliary time delay cutout circuit
Assignee: Individual
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Filing: 1961-01-30
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Granted: 1964-06-23
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Expires: 1981-01-30
Abstract
No abstract record available.
Inventors
- 👤 Gerald H French
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:07
CPC Classifications
H; H05; H05B; H05B39/00; H05B39/04; H05B39/06; Y; Y10; Y10S; Y10S315/00; Y10S315/03
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
A CONTROL CIRCUIT FOR A DEVICE COMPRISING A SOURCE OF ELECTRICAL POWER, A MAIN CIRCUIT FOR WIRING THE DEVICE ACROSS THE POWER SOURCE, A SWITCH FOR ALTERNATELY OPENING AND CLOSING THE MAIN CIRCUIT, AND AN AUXILIARY CIRCUIT ACROSS THE POWER SOURCE, THE AUXILIARY CIRCUIT INCLUDING THE DEVICE, A NORMALLY OPEN SWITCH IN THE AUXILIARY CIRCUIT HAVING A SWITCH CLOSING ELEMENT FOR CLOSING THE NORMALLY OPEN SWITCH IN RESPONSE TO AN INCREASE IN THE TEMPERATURE OF THE CLOSING ELEMENT ABOVE A PREDETERMINED VALUE, MEANS RESPONSIVE TO CLOSING OF THE MAIN CIRCUIT FOR INCREASING THE TEMPERATURE OF THE CLOSING ELEMENT ABOVE THE PREDETERMINED VALUE, TO CLOSE THE NORMALLY OPEN SWITCH, THE CLOSING OF THE NORMALLY OPEN SWITCH CAUSING THE AUX-
Claim 2
Dependent Claim
118 words
A CONTROL CIRCUIT FOR A DEVICE COMPRISING A SOURCE OF ELECTRICAL POWER, A MAIN CIRCUIT FOR WIRING THE DEVICE ACROSS THE POWER SOURCE, A SWITCH FOR ALTERNATELY OPENING AND CLOSING THE MAIN CIRCUIT, AND AN AUXILIARY CIRCUIT ACROSS THE POWER SOURCE, THE AUXILIARY CIRCUIT INCLUDING THE DEVICE, A NORMALLY OPEN SWITCH IN THE AUXILIARY CIRCUIT HAVING A SWITCH CLOSING ELEMENT FOR CLOSING THE NORMALLY OPEN SWITCH IN RESPONSE TO AN INCREASE IN THE TEMPERATURE OF THE CLOSING ELEMENT ABOVE A PREDETERMINED VALUE, MEANS RESPONSIVE TO CLOSING OF THE MAIN CIRCUIT FOR INCREASING THE TEMPERATURE OF THE CLOSING ELEMENT ABOVE THE PREDETERMINED VALUE, TO CLOSE THE NORMALLY OPEN SWITCH, THE CLOSING OF THE NORMALLY OPEN SWITCH CAUSING THE AUX-
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) | 1967-06-23 | 1967-12-23 | 1968-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-23 | 1971-12-23 | 1972-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-23 | 1975-12-23 | 1976-06-23 | $7700.00 | Window Closed / Lapsed |