GB489830A - Automatic fire alarm and extinguisher - Google Patents
Automatic fire alarm and extinguisherInfo
- Publication number
- GB489830A GB489830A GB3347537A GB3347537A GB489830A GB 489830 A GB489830 A GB 489830A GB 3347537 A GB3347537 A GB 3347537A GB 3347537 A GB3347537 A GB 3347537A GB 489830 A GB489830 A GB 489830A
- Authority
- GB
- United Kingdom
- Prior art keywords
- casing
- grenade
- hammer
- hammers
- slots
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B17/00—Fire alarms; Alarms responsive to explosion
- G08B17/08—Actuation involving the use of explosive means
Landscapes
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
Abstract
489,830. Fire alarms and extinguishers. GRISON, J. Dec. 3, 1937, No. 33475. [Classes 47 (i).and 47 (ii)] A combined fire extinguishing and alarm device comprises a casing 9 in which a grenade 12 is supported by a bracket and a resilient ring. The front and side walls of the casing are provided with pairs of lugs 17 in which are mounted hammers 20. Each hammer is pressed by a spring 24, is retained with the spring stressed by a fusible link 25, and has, at its end, a container 21 for an explosive cartridge and a firing pin 22. Each link 25 comprises overlapping plates 25a, 25b with registering slots 25c filled with solder, the plates having T-heads 25d for engagement with slots in the hammers and the casing walls. The three links are designed to fuse at successively higher temperatures, so that first the hammer at one side, then that at the other side, and finally that at the front, is released. Thus, three successive alarm explosions are produced, and the front hammer projects through an opening 16 in the casing to break the grenade. The casing has a lid 15 permitting removal of the grenade for hand use.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3347537A GB489830A (en) | 1937-12-03 | 1937-12-03 | Automatic fire alarm and extinguisher |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3347537A GB489830A (en) | 1937-12-03 | 1937-12-03 | Automatic fire alarm and extinguisher |
Publications (1)
Publication Number | Publication Date |
---|---|
GB489830A true GB489830A (en) | 1938-08-04 |
Family
ID=10353449
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3347537A Expired GB489830A (en) | 1937-12-03 | 1937-12-03 | Automatic fire alarm and extinguisher |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB489830A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2158711A (en) * | 1984-05-14 | 1985-11-20 | Ici America Inc | Fast acting actuation systems |
-
1937
- 1937-12-03 GB GB3347537A patent/GB489830A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2158711A (en) * | 1984-05-14 | 1985-11-20 | Ici America Inc | Fast acting actuation systems |
US4577544A (en) * | 1984-05-14 | 1986-03-25 | Ici Americas Inc. | Ultrafast thermal actuator |
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