Patent US3303391A successfully refreshed from Google Patents.
US3303391A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Overheat-protecting device
Assignee: Akai Electric Co Ltd
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Filing: 1963-08-20
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Granted: 1967-02-07
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Expires: 1983-08-20
Abstract
No abstract record available.
Inventors
- 👤 Kitami Moriaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:29
CPC Classifications
H; H02; H02H; H02H7/00; H02H7/20; H02H7/205; H02H5/00; H02H5/04; H02H5/042
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
A TEMPERATURE RESPONSIVE CONTROL DEVICE FOR PROTECTION OF A LOAD AGAINST OVERHEAT CONDITIONS COMPRISING, A POWER SOURCE, A RESET SWITCH, A SINGLE CORE, TWO-COIL RELAY HAVING TWO SETS OF CONTACT ASSEMBLIES WITH EACH OF SAID SETS HAVING TWO POSITIONS, THE FIRST OF SAID CONTACT ASSEMBLIES IN A FIRST POSITION BEING ELECTRICALLY CONNECTABLE TO A LOAD TO BE PROTECTED AND BEING ELECTRICALLY CONNECTED TO THE FIRST OF SAID COILS, THE SECOND OF SAID CONTACT ASSEMBLIES IN A FIRST POSITION BEING ELECTRICALLY DISCONNECTED FROM SAID RESET SWITCH AND BEING CONNECTED TO THE SECOND OF SAID COILS, A TRANSISTOR AMPLIFIER ELECTRICALLY CONNECTED TO SAID SECOND COIL AND TO A HEAT SENSITIVE CURRENT-CONDUCTIVE ELEMENT THE RESISTANCE OF WHICH DECREASES WITH INCREASE IN TEMPERATURE, SAID TRANSISTOR AMPLIFIER IN RESPONSE TO OVER-
Claim 2
Dependent Claim
126 words
A TEMPERATURE RESPONSIVE CONTROL DEVICE FOR PROTECTION OF A LOAD AGAINST OVERHEAT CONDITIONS COMPRISING, A POWER SOURCE, A RESET SWITCH, A SINGLE CORE, TWO-COIL RELAY HAVING TWO SETS OF CONTACT ASSEMBLIES WITH EACH OF SAID SETS HAVING TWO POSITIONS, THE FIRST OF SAID CONTACT ASSEMBLIES IN A FIRST POSITION BEING ELECTRICALLY CONNECTABLE TO A LOAD TO BE PROTECTED AND BEING ELECTRICALLY CONNECTED TO THE FIRST OF SAID COILS, THE SECOND OF SAID CONTACT ASSEMBLIES IN A FIRST POSITION BEING ELECTRICALLY DISCONNECTED FROM SAID RESET SWITCH AND BEING CONNECTED TO THE SECOND OF SAID COILS, A TRANSISTOR AMPLIFIER ELECTRICALLY CONNECTED TO SAID SECOND COIL AND TO A HEAT SENSITIVE CURRENT-CONDUCTIVE ELEMENT THE RESISTANCE OF WHICH DECREASES WITH INCREASE IN TEMPERATURE, SAID TRANSISTOR AMPLIFIER IN RESPONSE TO OVER-
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) | 1970-02-06 | 1970-08-08 | 1971-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-06 | 1974-08-08 | 1975-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-06 | 1978-08-08 | 1979-02-07 | $7700.00 | Window Closed / Lapsed |