US3297845A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fire-detecting thermostat
Assignee: STEVENS MANUFACTURING COMPANY Inc
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Filing: 1965-01-21
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Granted: 1967-01-10
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Expires: 1985-01-21
Abstract
No abstract record available.
Inventors
- 👤 Charles S Mertler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:53
CPC Classifications
H; H01; H01H; H01H37/00; H01H37/02; H01H37/32; H01H37/52; H01H37/54; H01H37/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
155 words
IN COMBINATION WITH A RAPID ACTING THERMOSTAT HAVING AN ANNULAR INSULATING HOUSING, SWITCH MEANS IN SAID HOUSING, AND A HEAT-SENSITIVE SNAP-ACTING BIMETALLIC DISC EXTENDING ACROSS ONE END OF THE HOUSING, A HEAT COLLECTOR OF HIGH HEAT CONDUCTIVITY METAL COMPRISING AN ANNULAR SIDE WALL SNUGLY RECEIVING SAID END OF THE HOUSING, A GENERALLY FLAT END WALL EXTENDING ACROSS THE OUTSIDE OF SAID BIMETALLIC DISC IN ENGAGING HEAT-TRANSMITTING RELATIONSHIP THEREWITH, SAID END WALL AND SAID SIDE WALL BEING INTEGRAL AND COMPLETELY ENCLOSING THE BIMETALLIC DISC IN THE HOUSING TO MAKE THE HOUSING DUST TIGHT, AND AN ANNULAR EXTENSION ATTACHED TO SAID END WALL AND PROJECTING SUBSTANTIALLY COPLANAR THEREWITH LATERALLY A SUBSTANTIAL DISTANCE BEYOND SAID SIDE WALL THROUGHOUT SUBSTANTIALLY THE ENTIRE ANNULAR EXTENT OF SAID SIDE WALL, SAID ANNULAR EXTENSION HAVING A PLURALITY OF CONVOLUTIONS IN SUCCESSION AROUND ITS CIRCUMFERENCE WHICH ENHANCE ITS STRUCTURAL RIGIDITY AND PROVIDE INCREASED SURFACE AREA EXPOSED ON BOTH SIDES TO THE AMBIENT AIR.
Claim 2
Dependent Claim
155 words
IN COMBINATION WITH A RAPID ACTING THERMOSTAT HAVING AN ANNULAR INSULATING HOUSING, SWITCH MEANS IN SAID HOUSING, AND A HEAT-SENSITIVE SNAP-ACTING BIMETALLIC DISC EXTENDING ACROSS ONE END OF THE HOUSING, A HEAT COLLECTOR OF HIGH HEAT CONDUCTIVITY METAL COMPRISING AN ANNULAR SIDE WALL SNUGLY RECEIVING SAID END OF THE HOUSING, A GENERALLY FLAT END WALL EXTENDING ACROSS THE OUTSIDE OF SAID BIMETALLIC DISC IN ENGAGING HEAT-TRANSMITTING RELATIONSHIP THEREWITH, SAID END WALL AND SAID SIDE WALL BEING INTEGRAL AND COMPLETELY ENCLOSING THE BIMETALLIC DISC IN THE HOUSING TO MAKE THE HOUSING DUST TIGHT, AND AN ANNULAR EXTENSION ATTACHED TO SAID END WALL AND PROJECTING SUBSTANTIALLY COPLANAR THEREWITH LATERALLY A SUBSTANTIAL DISTANCE BEYOND SAID SIDE WALL THROUGHOUT SUBSTANTIALLY THE ENTIRE ANNULAR EXTENT OF SAID SIDE WALL, SAID ANNULAR EXTENSION HAVING A PLURALITY OF CONVOLUTIONS IN SUCCESSION AROUND ITS CIRCUMFERENCE WHICH ENHANCE ITS STRUCTURAL RIGIDITY AND PROVIDE INCREASED SURFACE AREA EXPOSED ON BOTH SIDES TO THE AMBIENT AIR.
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) | 1970-01-09 | 1970-07-11 | 1971-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-09 | 1974-07-11 | 1975-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-09 | 1978-07-11 | 1979-01-10 | $7700.00 | Window Closed / Lapsed |