FR703951A - Improvements to fire alarm systems - Google Patents
Improvements to fire alarm systemsInfo
- Publication number
- FR703951A FR703951A FR703951DA FR703951A FR 703951 A FR703951 A FR 703951A FR 703951D A FR703951D A FR 703951DA FR 703951 A FR703951 A FR 703951A
- Authority
- FR
- France
- Prior art keywords
- fire alarm
- alarm systems
- systems
- fire
- alarm
- 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
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B29/00—Checking or monitoring of signalling or alarm systems; Prevention or correction of operating errors, e.g. preventing unauthorised operation
- G08B29/02—Monitoring continuously signalling or alarm systems
- G08B29/06—Monitoring of the line circuits, e.g. signalling of line faults
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Computer Security & Cryptography (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Fire Alarms (AREA)
- Alarm Systems (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE703951X | 1929-01-07 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR703951A true FR703951A (en) | 1931-05-08 |
Family
ID=20315539
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR703951D Expired FR703951A (en) | 1929-01-07 | 1930-01-04 | Improvements to fire alarm systems |
Country Status (4)
Country | Link |
---|---|
DE (1) | DE603437C (en) |
DK (1) | DK44500C (en) |
FR (1) | FR703951A (en) |
GB (1) | GB352037A (en) |
-
1929
- 1929-12-31 DK DK44500D patent/DK44500C/en active
-
1930
- 1930-01-04 FR FR703951D patent/FR703951A/en not_active Expired
- 1930-01-06 GB GB47830A patent/GB352037A/en not_active Expired
- 1930-01-08 DE DE1930603437D patent/DE603437C/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
DE603437C (en) | 1934-09-29 |
DK44500C (en) | 1931-08-17 |
GB352037A (en) | 1931-07-06 |
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