US3340490A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermistor
Assignee: Texas Instruments Inc
•
Filing: 1965-10-21
•
Granted: 1967-09-05
•
Expires: 1985-10-21
Abstract
No abstract record available.
Inventors
- 👤 Robert E Obenhaus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:41
CPC Classifications
H; H01; H01C; H01C7/00; H01C7/02; H01C7/022; H02; H02K; H02K11/00; H02K11/20; H02K11/25
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
A THERMISTOR FOR SENSING THE TEMPERATURE OF AN ELECTRICAL WINDING, SAID THERMISTOR COMPRISING: A BODY OF A SOLID STATE MATERIAL HAVING AN ELECTRICAL RESISTANCE WHICH VARIES WITH TEMPERATURE, SAID BODY HAVING A PAIR OF PARALLEL ELONGATE CHANNELS THEREIN WHICH EXTEND ALONG SUBSTANTIALLY OPPOSITE SIDES OF SAID BODY THEREBY DEFINING A RESTRICTED ZONE THEREBETWEEN, WHICH ZONE IS IN CLOSE HEAT-EXCHANGE RELATIONSHIP WITH THE SURFACES OF BOTH OF SAID CHANNELS, EACH OF SAID CHANNELS BEING ADAPTED TO RECEIVE A RESPECTIVE ONE OF A PAIR OF ADJACENT CONDUCTORS IN SAID WINDING; AND A PAIR OF CONDUCTIVE LEADS IN ELECTRICAL CONTACT WITH SAID BODY AT RESPECTIVE POINTS WHICH ARE SPACED FROM SAID CHANNELS AND AREA ON OPPOSITE SIDES OF SAID RESTRICTED ZONE THEREBY PROVIDING A RESISTIVE PATH
Claim 2
Dependent Claim
123 words
A THERMISTOR FOR SENSING THE TEMPERATURE OF AN ELECTRICAL WINDING, SAID THERMISTOR COMPRISING: A BODY OF A SOLID STATE MATERIAL HAVING AN ELECTRICAL RESISTANCE WHICH VARIES WITH TEMPERATURE, SAID BODY HAVING A PAIR OF PARALLEL ELONGATE CHANNELS THEREIN WHICH EXTEND ALONG SUBSTANTIALLY OPPOSITE SIDES OF SAID BODY THEREBY DEFINING A RESTRICTED ZONE THEREBETWEEN, WHICH ZONE IS IN CLOSE HEAT-EXCHANGE RELATIONSHIP WITH THE SURFACES OF BOTH OF SAID CHANNELS, EACH OF SAID CHANNELS BEING ADAPTED TO RECEIVE A RESPECTIVE ONE OF A PAIR OF ADJACENT CONDUCTORS IN SAID WINDING; AND A PAIR OF CONDUCTIVE LEADS IN ELECTRICAL CONTACT WITH SAID BODY AT RESPECTIVE POINTS WHICH ARE SPACED FROM SAID CHANNELS AND AREA ON OPPOSITE SIDES OF SAID RESTRICTED ZONE THEREBY PROVIDING A RESISTIVE PATH
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) | 1970-09-04 | 1971-03-06 | 1971-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-04 | 1975-03-06 | 1975-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-04 | 1979-03-06 | 1979-09-05 | $7700.00 | Window Closed / Lapsed |