BE427958A - - Google Patents
Info
- Publication number
- BE427958A BE427958A BE427958DA BE427958A BE 427958 A BE427958 A BE 427958A BE 427958D A BE427958D A BE 427958DA BE 427958 A BE427958 A BE 427958A
- Authority
- BE
- Belgium
Links
Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B27/00—Alarm systems in which the alarm condition is signalled from a central station to a plurality of substations
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B3/00—Audible signalling systems; Audible personal calling systems
- G08B3/10—Audible signalling systems; Audible personal calling systems using electric transmission; using electromagnetic transmission
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Electromagnetism (AREA)
- Relay Circuits (AREA)
- Emergency Alarm Devices (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1310037A GB495057A (en) | 1937-05-07 | 1937-05-07 | Improvements in or relating to electric systems for giving air-raid warnings |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE427958A true BE427958A (en) |
Family
ID=10016828
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE427958D BE427958A (en) | 1937-05-07 |
Country Status (2)
| Country | Link |
|---|---|
| BE (1) | BE427958A (en) |
| GB (1) | GB495057A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3025496A (en) * | 1956-09-27 | 1962-03-13 | Landis & Gyr Ag | Receiver for remote control impulses |
| US2990537A (en) * | 1957-09-13 | 1961-06-27 | Mc Graw Edison Co | Remote control system |
| US6906616B1 (en) | 1995-03-20 | 2005-06-14 | Wheelock, Inc. | Apparatus and method for synchronizing visual/audible alarm units in an alarm system |
| US5608375A (en) | 1995-03-20 | 1997-03-04 | Wheelock Inc. | Synchronized visual/audible alarm system |
-
0
- BE BE427958D patent/BE427958A/xx unknown
-
1937
- 1937-05-07 GB GB1310037A patent/GB495057A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB495057A (en) | 1938-11-07 |