CH202679A - Selbsttätige elektrische Alarmanlage. - Google Patents
Selbsttätige elektrische Alarmanlage.Info
- Publication number
- CH202679A CH202679A CH202679DA CH202679A CH 202679 A CH202679 A CH 202679A CH 202679D A CH202679D A CH 202679DA CH 202679 A CH202679 A CH 202679A
- Authority
- CH
- Switzerland
- Prior art keywords
- alarm system
- automatic electrical
- electrical alarm
- automatic
- electrical
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B25/00—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems
- G08B25/01—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium
- G08B25/018—Sensor coding by detecting magnitude of an electrical parameter, e.g. resistance
-
- 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)
- Emergency Alarm Devices (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE202679X | 1937-01-20 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH202679A true CH202679A (de) | 1939-01-31 |
Family
ID=20304948
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH202679D CH202679A (de) | 1937-01-20 | 1938-01-20 | Selbsttätige elektrische Alarmanlage. |
Country Status (6)
Country | Link |
---|---|
US (1) | US2294043A (de) |
BE (1) | BE425857A (de) |
CH (1) | CH202679A (de) |
DE (1) | DE722085C (de) |
FR (1) | FR832277A (de) |
NL (1) | NL54631C (de) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1075019B (de) * | 1960-02-04 | Dragerwerk Hemr S. Bernh Drager Lübeck | Elektrischer Fern Temperatur-Anzeiger fur Kraftfahrzeuge | |
US2636163A (en) * | 1951-04-19 | 1953-04-21 | Earle V Gardiner | Burglar alarm system |
US2696603A (en) * | 1952-06-10 | 1954-12-07 | Ekman Olof Ingemar Harald | Two-wire alarm or control system |
US3648268A (en) * | 1969-11-03 | 1972-03-07 | Melvin Paull | Surveillance and alarm system |
-
0
- BE BE425857D patent/BE425857A/xx unknown
- NL NL54631D patent/NL54631C/xx active
-
1937
- 1937-09-30 DE DEN41210D patent/DE722085C/de not_active Expired
-
1938
- 1938-01-13 US US184892A patent/US2294043A/en not_active Expired - Lifetime
- 1938-01-19 FR FR832277D patent/FR832277A/fr not_active Expired
- 1938-01-20 CH CH202679D patent/CH202679A/de unknown
Also Published As
Publication number | Publication date |
---|---|
US2294043A (en) | 1942-08-25 |
NL54631C (de) | |
DE722085C (de) | 1942-06-30 |
BE425857A (de) | |
FR832277A (fr) | 1938-09-23 |
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