GB208645A - Improvements in electric fire alarms - Google Patents
Improvements in electric fire alarmsInfo
- Publication number
- GB208645A GB208645A GB3550822A GB3550822A GB208645A GB 208645 A GB208645 A GB 208645A GB 3550822 A GB3550822 A GB 3550822A GB 3550822 A GB3550822 A GB 3550822A GB 208645 A GB208645 A GB 208645A
- Authority
- GB
- United Kingdom
- Prior art keywords
- fire alarms
- semi
- electric fire
- strips
- fusible
- 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
- G08B17/06—Electric actuation of the alarm, e.g. using a thermally-operated switch
Landscapes
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Fire-Detection Mechanisms (AREA)
Abstract
208,645. Edwards, A. H. Dec. 30, 1922. Alarms operated by fusible devices.-An automatic electric contact device for fire alarms comprises two semi-conical metal strips d mounted in a porcelain base a, the pointed ends of the strips being tinned and provided with fusible metal g which, on melting, makes electric connection between them. The semi-cones are coated with flux to ensure good contact. The device may be used in an ordinary bell circuit.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3550822A GB208645A (en) | 1922-12-30 | 1922-12-30 | Improvements in electric fire alarms |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3550822A GB208645A (en) | 1922-12-30 | 1922-12-30 | Improvements in electric fire alarms |
Publications (1)
Publication Number | Publication Date |
---|---|
GB208645A true GB208645A (en) | 1923-12-27 |
Family
ID=10378536
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3550822A Expired GB208645A (en) | 1922-12-30 | 1922-12-30 | Improvements in electric fire alarms |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB208645A (en) |
-
1922
- 1922-12-30 GB GB3550822A patent/GB208645A/en not_active Expired
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