US3590770A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fire alarm
Assignee: Watsco Inc
•
Filing: 1969-10-29
•
Granted: 1971-07-06
•
Expires: 1989-10-29
Abstract
Abstract A self-contained fire alarm including a horn, a container for a pressurized propellant to sound the horn and self-operating valve means connecting between the horn and the container. The valve means consists of a guided spring-urged valve acting against propellant pressure.
Inventors
- 👤 William Wagner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:02
CPC Classifications
G; G08; G08B; G08B17/00; G08B17/04; G10; G10K; G10K7/00; G10K7/06; Y; Y10; Y10S; Y10S116/00; Y10S116/07; Y10T; Y10T137/00; Y10T137/8158; Y10T137/8326
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
103 words
A fire alarm, comprising in combination: a. a horn; b. a container including pressurized content; c. valve means, said valve means connecting between said horn and said container and comprising a valve spring urged against content pressure, whereby content pressure in excess of spring bias opens said valve and escapes through and sounds said horn, said valve means comprising: i. a valve seat having a central bore; ii. a spring, the axis of said spring being at an angle with respect to the axis of said bore; and iii. a valve, said valve being spring urged by said spring askew of said bore.
Claim 2
Dependent Claim
103 words
A fire alarm, comprising in combination: a. a horn; b. a container including pressurized content; c. valve means, said valve means connecting between said horn and said container and comprising a valve spring urged against content pressure, whereby content pressure in excess of spring bias opens said valve and escapes through and sounds said horn, said valve means comprising: i. a valve seat having a central bore; ii. a spring, the axis of said spring being at an angle with respect to the axis of said bore; and iii. a valve, said valve being spring urged by said spring askew of said bore.
Claim 3
Dependent Claim
46 words
A fire alarm in accordance with claim 1, additionally comprising: a. a coupling, said coupling connecting between said container and said valve means and comprising a clampable flange; and b. piercing means, said piercing means being mounted at said coupling for piercing contact with said container.
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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) | 1974-07-05 | 1975-01-04 | 1975-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-05 | 1979-01-04 | 1979-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-05 | 1983-01-04 | 1983-07-06 | $7700.00 | Window Closed / Lapsed |