Patent US3114820A successfully refreshed from Google Patents.
US3114820A
Expired / Lapsed
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Heat responsive control circuit
Assignee: General Electric Co
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Filing: 1961-04-05
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Granted: 1963-12-17
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Expires: 1981-04-05
Abstract
No abstract record available.
Inventors
- 👤 Robert G Holmes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:04
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
115 words
IN AN ELECTRICALLY HEATED DEVICE INCLUDING AN ELECTRIC HEATER, A HEAT RESPONSIVE CONTROL CIRCUIT COMPRISING A PAIR OF SIGNAL WIRES PHYSICALLY ARRANGED SUBSTANTIALLY MUTUALLY IN PARALLEL, SAID PAIR OF SIGNAL WIRES BEING ELECTRICALLY CONNECTED IN PARALLEL WITH SAID HEATER, A MATERIAL HAVING A NEGATIVE COEFFICIENT OF RESISTANCE POSITIONED BETWEEN AND IN CONTACT WITH SAID SIGNAL WIRES, A RECTIFIER CONNECTED BETWEEN AN END OF ONE OF SAID SIGNAL WIRES AND AN END OF THE OTHER OF SAID SIGNAL WIRES, A CONTROL DEVICE ADAPTED TO DISTINGUISH BETWEEN RECTIFIED CURRENT AND ALTERNATING CURRENT, A SOURCE OF ALTERNATING CURRENT, AND MEANS CONNECTING THE REMAINING ENDS OF SAID SIGNAL WIRES BETWEEN SAID CONTROL DEVICE AND SAID SOURCE OF ALTERNATING CURRENT.
Claim 2
Dependent Claim
115 words
IN AN ELECTRICALLY HEATED DEVICE INCLUDING AN ELECTRIC HEATER, A HEAT RESPONSIVE CONTROL CIRCUIT COMPRISING A PAIR OF SIGNAL WIRES PHYSICALLY ARRANGED SUBSTANTIALLY MUTUALLY IN PARALLEL, SAID PAIR OF SIGNAL WIRES BEING ELECTRICALLY CONNECTED IN PARALLEL WITH SAID HEATER, A MATERIAL HAVING A NEGATIVE COEFFICIENT OF RESISTANCE POSITIONED BETWEEN AND IN CONTACT WITH SAID SIGNAL WIRES, A RECTIFIER CONNECTED BETWEEN AN END OF ONE OF SAID SIGNAL WIRES AND AN END OF THE OTHER OF SAID SIGNAL WIRES, A CONTROL DEVICE ADAPTED TO DISTINGUISH BETWEEN RECTIFIED CURRENT AND ALTERNATING CURRENT, A SOURCE OF ALTERNATING CURRENT, AND MEANS CONNECTING THE REMAINING ENDS OF SAID SIGNAL WIRES BETWEEN SAID CONTROL DEVICE AND SAID SOURCE OF ALTERNATING CURRENT.
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) | 1966-12-16 | 1967-06-17 | 1967-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-12-16 | 1971-06-17 | 1971-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-12-16 | 1975-06-17 | 1975-12-17 | $7700.00 | Window Closed / Lapsed |