US3555531A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Visual fire warning system
Assignee: Individual
•
Filing: 1968-10-10
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Granted: 1971-01-12
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Expires: 1988-10-10
Abstract
Abstract A FIRE WARNING SYSTEM IS MOUNTED ON THE BACK OF A LIGHT SWITCH PLATE AND INCLUDES A CURRENT ACTUATED INTERRUPTER CONNECTED BETWEEN THE CURRENT SUPPLY AND THE LIGHT SWITCH. A THERMAL SENSITIVE SWITCH IS CONNECTED TO THE INTERRUPTER AND LIGHT SWITCH AND NORMALLY SHORTS THE INTERRUPTER SO THAT THE LIGHT AND SWITCH FUNCTION NORMALLY. IN AN ALARM CONDITION, THE THERMAL SWITCH CONNECTS THE LIGHT TO THE CURRENT SOURCE THROUGH THE INTERRUPTER SO THAT THE LIGHT FLASHES ON AND OFF RAPIDLY TO PROVIDE A VISUAL ALARM AND AROUSE ANY SLEEPING OCCUPANTS OF THE ROOM IN DANGER OF FIRE.
Inventors
- 👤 Liber J Montone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:20
CPC Classifications
G; G08; G08B; G08B17/00; G08B17/06; Y; Y10; Y10S; Y10S362/00; Y10S362/802
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |