US3937284A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Exothermic chemical reactive sprinkler release
Assignee: Individual
•
Filing: 1974-09-30
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Granted: 1976-02-10
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Expires: 1994-09-30
Abstract
Abstract A thermally sensitive stored chemical energy capsule is formed in the heat collector or attached to the fusible link of existing thermally sensitive sprinkler heads for activating individual sprinkler heads by heat generated by the intermingling of the capsule contained chemicals.
Inventors
- 👤 Richard J. Young
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 04:37
CPC Classifications
A; A62; A62C; A62C37/00; A62C37/08; A62C37/10
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
87 words
An exothermic release for a thermally sensitive sprinkler head having a fusible element normally maintaining the sprinkler head inactive, the improvement comprising: a thermally sensitive heat generating capsule disposed adjacent said fusible element, said capsule confining a heat expansible medium with a quantity of sodium and containing water; and, partition means capable of being ruptured by the expansion of said expansible medium beyond a predetermined limit for commingling said sodium and water and fusing said fusible element, normally separating said sodium and expansible medium from said water.
Claim 2
Dependent Claim
87 words
An exothermic release for a thermally sensitive sprinkler head having a fusible element normally maintaining the sprinkler head inactive, the improvement comprising: a thermally sensitive heat generating capsule disposed adjacent said fusible element, said capsule confining a heat expansible medium with a quantity of sodium and containing water; and, partition means capable of being ruptured by the expansion of said expansible medium beyond a predetermined limit for commingling said sodium and water and fusing said fusible element, normally separating said sodium and expansible medium from said water.
Claim 3
Dependent Claim
45 words
The combination according to claim 1 in which said partition means includes: a hollow case containing the water and transversely dividing said capsule and forming a closed chamber for containing the sodium and the expansible medium, said case having a frangible wall adjacent the chamber.
Claim 4
Dependent Claim
28 words
The combination according to claim 2 in which the expansible medium comprises: a liquid inert with the sodium and completely filling the chamber in combination with the sodium.
Claim 5
Dependent Claim
18 words
The combination according to claim 3 in which the inert liquid has a specific gravity less than water.
Claim 6
Dependent Claim
13 words
The combination according to claim 3 in which said frangible wall is glass.
Claim 7
Dependent Claim
17 words
The combination according to claim 5 and further including: a pressure release valve communicating with said case.
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) | 1979-02-09 | 1979-08-11 | 1980-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-02-09 | 1983-08-11 | 1984-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-02-09 | 1987-08-11 | 1988-02-10 | $7700.00 | Window Closed / Lapsed |