EP 0144250 A2 19850612 - Fire alarm systems with incipient hyper-sensitivity monitoring.
Title (en)
Fire alarm systems with incipient hyper-sensitivity monitoring.
Title (de)
Feueralarmsystem mit Überwachung der beginnenden Hypersensivität.
Title (fr)
Système détecteur de fumée avec contrÔle de l'hyper sensibilité naissante.
Publication
Application
Priority
GB 8332750 A 19831208
Abstract (en)
A method of and apparatus for monitoring for incipient hyper-sensitivity of any detector station in an alarm system comprising a plurality of detector stations in a spur loop-ring between an alarm unit and an end-of-line unit. The detector stations are each provided with means for triggering an alarm, and with self-monitoring means for detecting any excessive increase in sensitivity due to contamination of a detector, which means initiate a fault indication, thus enabling remedial action to be taken before a false alarm is given.
IPC 1-7
IPC 8 full level
G08B 17/00 (2006.01); G08B 27/00 (2006.01); G08B 29/04 (2006.01); G08B 29/06 (2006.01)
CPC (source: EP)
G08B 17/00 (2013.01); G08B 27/00 (2013.01); G08B 29/04 (2013.01); G08B 29/06 (2013.01)
Designated contracting state (EPC)
AT BE CH DE FR GB IT LI LU NL SE
DOCDB simple family (publication)
EP 0144250 A2 19850612; EP 0144250 A3 19870916; GB 2151058 A 19850710; GB 8332750 D0 19840118
DOCDB simple family (application)
EP 84308529 A 19841207; GB 8332750 A 19831208