Carbon monoxide detector
Abstract
Abstract THE CARBON MONOXIDE DETECTOR COMPRISES TWO PARALLEL MOUNTED CYLINDERS OF METAL HAVING A HIGH COEFFICIENT OF LINEAR EXPANSION AND SPACED APART FROM ONE ANOTHER ON A COMMON BASE. A CHEMICAL CATALYST OF THE TYPE CAPABLE OF GENERATING HEAT WHEN EXPOSED TO A MINIMAL CONCENTRATION OF CARBON MONOXIDE IS MOUNTED WITHIN A POROUS TUBE PLACED WITHIN ONE OF THE CYLINDERS. FREE AIR IS ALLOWED TO ENTER THE CATALYST CONTAINING CYLINDER FROM ITS BASE AND CIRULATE ABOUT THE CATALYST. THE HEAT GENERATED BY THE CATALYTIC REACTION OF CARBON MONOXIDE IN AIR WILL CAUSE THE LINEAR EXPANSION OF THE CYLINDER THEREBY CLOSING THE MICROSWITCHING MECHANISM MOUNTED PARTLY AT THE TOP OF EACH CYLINDER. BY USING TWO CYLINDERS HAVING A HIGH COEFFICIENT OF LINEAR EXPANSION, CHANGES IN AMBIENT TEMPERATURE MAY BE COMPENSATED FOR.
Inventors
- 👤 John M Ward
Bibliographic Details
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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) | 1974-05-03 | 1974-11-02 | 1975-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-03 | 1978-11-02 | 1979-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-03 | 1982-11-02 | 1983-05-04 | $7700.00 | Window Closed / Lapsed |