US3418454A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric bedcover overtemperature control system
Assignee: General Electric Co
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Filing: 1965-12-30
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Granted: 1968-12-24
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Expires: 1985-12-30
Abstract
No abstract record available.
Inventors
- 👤 Jr William D Ryckman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:26
CPC Classifications
H; H05; H05B; H05B1/00; H05B1/02; H05B1/0202; H05B1/0213; G; G05; G05D; G05D23/00; G05D23/19; G05D23/1906; G05D23/1913; G05D23/20; G05D23/24; H01; H01H; H01H61/00; H01H61/01; H01H61/013; H01H61/02; H05B3/00; H05B3/20; H05B3/34; H05B3/342; H05B2203/00; H05B2203/002; H05B2203/003; H05B2203/014; H05B2203/017
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
165 words
AN OVERTEMPERATURE CONTROL SYSTEM FOR AN ELECTRICALLY HEATED BEDCOVER OR THE LIKE ADAPTED TO BE CONNECTED TO A SOURCE OF POWER COMPRISING: (A) A TEMPERATURE SENSOR HAVING A PAIR OF ELECTRICAL CONDUCTORS SEPARATED BY A LAYER OF MATERIAL WHICH IS ESSENTIALLY AN INSULATOR AT NORMAL OPERATING TEMPERATURES AND A CONDUCTOR OF SIGNIFICANT CURRENT AT AN ELEVATED TEMPERATURE; (B) FIRST AND SECOND ACTUATORS; (C) A PARALLEL CIRCUIT INCLUDING SAID SECOND ACTUATOR IN ELECTRICAL PARALLEL WITH SAID SENSOR LAYER; (D) A SERIES ELECTRICAL CIRCUIT CONNECTED TO THE POWER SOURCE INCLUDING SAID FIRST ACTUATOR IN ELECTRICAL SERIES WITH SAID PARALLEL CIRCUIT; (E) A PAIR OF SWITCH CONTACTS ARRANGED TO OPEN AND CLOSE A CIRCUIT FROM THE ELECTRICAL POWER SOURCE, SAID CONTACTS BEING ACTUATED BY RESPE CTIVE ONES OF SAID ACTUATORS TO CLOSE SAID CONTACTS FROM THE ENERGY RATIO SUPPLIED TO SAID ACTUATORS WHEN THERE IS NO APPRECIABLE CONDUCTION THROUGH SAID LAYER AT NORMAL OPERATING TEMPERATURES AND TO OPEN SAID CONTACTS WHEN THERE IS APPRECIABLE CONDUCTION THROUGH SAID LAYER.
Claim 2
Dependent Claim
165 words
AN OVERTEMPERATURE CONTROL SYSTEM FOR AN ELECTRICALLY HEATED BEDCOVER OR THE LIKE ADAPTED TO BE CONNECTED TO A SOURCE OF POWER COMPRISING: (A) A TEMPERATURE SENSOR HAVING A PAIR OF ELECTRICAL CONDUCTORS SEPARATED BY A LAYER OF MATERIAL WHICH IS ESSENTIALLY AN INSULATOR AT NORMAL OPERATING TEMPERATURES AND A CONDUCTOR OF SIGNIFICANT CURRENT AT AN ELEVATED TEMPERATURE; (B) FIRST AND SECOND ACTUATORS; (C) A PARALLEL CIRCUIT INCLUDING SAID SECOND ACTUATOR IN ELECTRICAL PARALLEL WITH SAID SENSOR LAYER; (D) A SERIES ELECTRICAL CIRCUIT CONNECTED TO THE POWER SOURCE INCLUDING SAID FIRST ACTUATOR IN ELECTRICAL SERIES WITH SAID PARALLEL CIRCUIT; (E) A PAIR OF SWITCH CONTACTS ARRANGED TO OPEN AND CLOSE A CIRCUIT FROM THE ELECTRICAL POWER SOURCE, SAID CONTACTS BEING ACTUATED BY RESPE CTIVE ONES OF SAID ACTUATORS TO CLOSE SAID CONTACTS FROM THE ENERGY RATIO SUPPLIED TO SAID ACTUATORS WHEN THERE IS NO APPRECIABLE CONDUCTION THROUGH SAID LAYER AT NORMAL OPERATING TEMPERATURES AND TO OPEN SAID CONTACTS WHEN THERE IS APPRECIABLE CONDUCTION THROUGH SAID LAYER.
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) | 1971-12-24 | 1972-06-24 | 1972-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-24 | 1976-06-24 | 1976-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-24 | 1980-06-24 | 1980-12-24 | $7700.00 | Window Closed / Lapsed |