EP 0980056 A1 20000216 - Alarm system
Title (en)
Alarm system
Title (de)
Alarmsystem
Title (fr)
Système d'alarme
Publication
Application
Priority
- EP 98306414 A 19980811
- GB 9709207 A 19970508
Abstract (en)
A fire alarm system comprises a warning device 18 and a control panel 10 for providing an alarm signal to trigger the sounder device 18 when a fire is detected. The control panel 10 comprises a power supply 12 which incorporates a rechargeable battery 13, the normal output voltage of the power supply 12 being greater than the voltage at which the output of the sounder device 18 is at or above a predetermined acceptable level. Thus, in the event that the sounder device 18 is triggered before or during a power failure, the output of the sounder device 18 will remain at or above the predetermined acceptable level for a considerable length of time, until the battery becomes exhausted. <IMAGE>
IPC 1-7
IPC 8 full level
G08B 29/18 (2006.01)
CPC (source: EP)
G08B 29/181 (2013.01)
Citation (search report)
- [X] WO 9811666 A1 19980319 - BOSCH GMBH ROBERT [DE], et al
- [Y] US 4954805 A 19900904 - BUYAK WILLIAM P [US]
- [Y] US 5160913 A 19921103 - YOON YOUNG S [US]
- [A] US 4929924 A 19900529 - BUYAK WILLIAM P [US], et al
- [A] US 4499453 A 19850212 - RIGHT ROBERT W [US]
- [A] DE 8411757 U1 19840809
- [A] DE 2745292 A1 19790412 - PREUSSAG AG FEUERSCHUTZ
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
GB 2325074 A 19981111; GB 9709207 D0 19970625; EP 0980056 A1 20000216
DOCDB simple family (application)
GB 9709207 A 19970508; EP 98306414 A 19980811