EP 0156474 A1 19851002 - Vigilant fire alarm system.
Title (en)
Vigilant fire alarm system.
Title (de)
Feueralarmsystem.
Title (fr)
Système d'alarme d'incendie.
Publication
Application
Priority
GB 8404883 A 19840224
Abstract (en)
The system comprises central control means (10) and a plurality of remote stations (21,23) capable of communicating with said control means wherein the communication between said central control means and each remote station by means of at least one tone burst whereby data passing between control means and the remote station is determined by the duration and/or the number of tone bursts transmitted.
IPC 1-7
IPC 8 full level
G08B 26/00 (2006.01)
CPC (source: EP)
G08B 26/002 (2013.01); G08B 26/005 (2013.01)
Citation (search report)
- [Y] US 3927404 A 19751216 - COOPER GLENN F
- [Y] US 3815093 A 19740604 - JOHNSON G, et al
- [A] US 3716834 A 19730213 - ADAMS H
- [AP] EP 0111178 A1 19840620 - CERBERUS AG [CH]
- [AP] EP 0111982 A1 19840627 - AMERICAN DISTRICT TELEGRAPH CO [US]
Designated contracting state (EPC)
AT BE CH DE FR GB IT LI LU NL SE
DOCDB simple family (publication)
DOCDB simple family (application)
EP 85300866 A 19850208; CA 474341 A 19850214