Patent US3254180A successfully refreshed from Google Patents.
US3254180A
Expired / Lapsed
US
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Rapid-phase-transformation thermostatic device
Assignee: Texas Instruments Inc
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Filing: 1961-08-07
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Granted: 1966-05-31
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Expires: 1981-08-07
Abstract
No abstract record available.
Inventors
- 👤 Charles D Flanagan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:17
CPC Classifications
H; H01; H01H; H01H61/00; H01H61/01; H01H61/0107; H01H37/00; H01H37/02; H01H37/32; H01H37/52
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
133 words
A THERMOSTATIC SNAP-ACTING ELECTRIC SWITCHING DEVICE COMPRISING A FIXED CONTACT, A RELATIVELY MOVABLE CONTACT, AN ELEMENT CONSISTING OF A SOLID-PHASE MATERIAL CHARACTERIZED BY A GRADUAL VOLUME CHANGE WHICH OCCURS OVER A SUBSTANTIAL TEMPERATURE RANGE AND BY A SOLID-PHASE CRYSTALLINE TRANSFORMATION WHICH OCCURS AT A CERTAIN TEMPERATURE ACCOMPANIED BY SNAP-ACTING CHANGE IN VOLUME OVER A SMALL PART OF SAID TEMPERATURE RANGE, SAID SNAP-ACTING CHANGE OCCURRING ON THE ORDER OF A FEW THOUSANDS OF A SECOND, MEANS CONNECTED WITH SAID ELEMENT AND WITH SAID MOVABLE CONTACT FOR TRANSLATING SAID SNAP-ACTING VOLUME CHANGE INTO SNAP-ACTING MOTION OF THE MOVABLE CONTACT OF A SUBSTANTIAL AMOUNT OVER AN INTERVAL ON SAID ORDER OF A FEW THOUSANDTHS OF A SECOND, AND MEANS FOR HEATING SAID MATERIAL TO SAID CERTAIN TEMPERATURE TO BRING ABOUT SAID MOTION OF THE MOVABLE CONTACT.
Claim 2
Dependent Claim
133 words
A THERMOSTATIC SNAP-ACTING ELECTRIC SWITCHING DEVICE COMPRISING A FIXED CONTACT, A RELATIVELY MOVABLE CONTACT, AN ELEMENT CONSISTING OF A SOLID-PHASE MATERIAL CHARACTERIZED BY A GRADUAL VOLUME CHANGE WHICH OCCURS OVER A SUBSTANTIAL TEMPERATURE RANGE AND BY A SOLID-PHASE CRYSTALLINE TRANSFORMATION WHICH OCCURS AT A CERTAIN TEMPERATURE ACCOMPANIED BY SNAP-ACTING CHANGE IN VOLUME OVER A SMALL PART OF SAID TEMPERATURE RANGE, SAID SNAP-ACTING CHANGE OCCURRING ON THE ORDER OF A FEW THOUSANDS OF A SECOND, MEANS CONNECTED WITH SAID ELEMENT AND WITH SAID MOVABLE CONTACT FOR TRANSLATING SAID SNAP-ACTING VOLUME CHANGE INTO SNAP-ACTING MOTION OF THE MOVABLE CONTACT OF A SUBSTANTIAL AMOUNT OVER AN INTERVAL ON SAID ORDER OF A FEW THOUSANDTHS OF A SECOND, AND MEANS FOR HEATING SAID MATERIAL TO SAID CERTAIN TEMPERATURE TO BRING ABOUT SAID MOTION OF THE MOVABLE CONTACT.
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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) | 1969-05-30 | 1969-11-29 | 1970-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-30 | 1973-11-29 | 1974-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-30 | 1977-11-29 | 1978-05-31 | $7700.00 | Window Closed / Lapsed |