BE469337A - - Google Patents
Info
- Publication number
- BE469337A BE469337A BE469337DA BE469337A BE 469337 A BE469337 A BE 469337A BE 469337D A BE469337D A BE 469337DA BE 469337 A BE469337 A BE 469337A
- Authority
- BE
- Belgium
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
- G08B25/04—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 using a single signalling line, e.g. in a closed loop
- G08B25/045—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 using a single signalling line, e.g. in a closed loop with sensing devices and central station in a closed loop, e.g. McCullough loop
-
- 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)
- Alarm Systems (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB283940X | 1945-10-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE469337A true BE469337A (zh) |
Family
ID=10274917
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE469337D BE469337A (zh) | 1945-10-19 |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US2531391A (zh) |
| BE (1) | BE469337A (zh) |
| CH (1) | CH283940A (zh) |
| ES (1) | ES176257A1 (zh) |
| FR (1) | FR934920A (zh) |
| GB (1) | GB619501A (zh) |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US454924A (en) * | 1891-06-30 | Frank b | ||
| US683759A (en) * | 1886-01-29 | 1901-10-01 | Felix Benedict Herzog | Electric signaling apparatus. |
| GB300927A (en) * | 1927-05-18 | 1928-11-19 | Siemens Ag | Improvements in or relating to fire alarm systems and apparatus |
| US2215436A (en) * | 1932-01-27 | 1940-09-17 | Gen Railway Signal Co | Centralized traffic controlling system |
| US2114324A (en) * | 1933-02-14 | 1938-04-19 | Gamewell Co | Signal repeater system |
| US2287816A (en) * | 1938-07-12 | 1942-06-30 | American District Telegraph Co | Double signal system |
| BE468184A (zh) * | 1942-04-30 | |||
| US2373134A (en) * | 1942-08-06 | 1945-04-10 | Bell Telephone Labor Inc | Signaling system |
-
0
- BE BE469337D patent/BE469337A/xx unknown
-
1945
- 1945-10-19 GB GB27544/45A patent/GB619501A/en not_active Expired
-
1946
- 1946-10-17 FR FR934920D patent/FR934920A/fr not_active Expired
- 1946-10-19 CH CH283940D patent/CH283940A/de unknown
- 1946-11-09 US US709026A patent/US2531391A/en not_active Expired - Lifetime
- 1946-12-28 ES ES176257A patent/ES176257A1/es not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| ES176257A1 (es) | 1947-02-01 |
| GB619501A (en) | 1949-03-10 |
| US2531391A (en) | 1950-11-28 |
| CH283940A (de) | 1952-06-30 |
| FR934920A (fr) | 1948-06-04 |