GB390745A - Improvements in or relating to automatic fire-alarm apparatus - Google Patents
Improvements in or relating to automatic fire-alarm apparatusInfo
- Publication number
- GB390745A GB390745A GB28729/32A GB2872932A GB390745A GB 390745 A GB390745 A GB 390745A GB 28729/32 A GB28729/32 A GB 28729/32A GB 2872932 A GB2872932 A GB 2872932A GB 390745 A GB390745 A GB 390745A
- Authority
- GB
- United Kingdom
- Prior art keywords
- fuse
- springs
- relating
- automatic fire
- alarm apparatus
- 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)
- Fuses (AREA)
Abstract
390,745. Thermal switches. SORENSEN, C., 9, Universitetsgaten, Oslo, Norway. Oct. 14, 1932, No. 28729. Convention date, April 27. [Class 38 (v).] Two or more metal springs or similar elements are inserted in parallel in a fire-alarm circuit which is held open by means of a fuse. A common fuse 8, as shown, holds springs 1, 2 away from circuit contacts 4, 5 respectively. The springs 1, 2 may be arranged side by side or behind one another, as shown, and may subject the fuse to tension or compression. The invention ensures a multiple safety in the event of the contacts becoming dirty.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NO390745X | 1932-04-27 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB390745A true GB390745A (en) | 1933-04-13 |
Family
ID=19905501
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB28729/32A Expired GB390745A (en) | 1932-04-27 | 1932-10-14 | Improvements in or relating to automatic fire-alarm apparatus |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB390745A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114352161A (en) * | 2022-01-23 | 2022-04-15 | 陈丽军 | Intelligent aluminum alloy door and window |
-
1932
- 1932-10-14 GB GB28729/32A patent/GB390745A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114352161A (en) * | 2022-01-23 | 2022-04-15 | 陈丽军 | Intelligent aluminum alloy door and window |
CN114352161B (en) * | 2022-01-23 | 2023-08-08 | 广东省星际铝业有限公司 | Intelligent aluminum alloy door and window |
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