Alarm system

Details Alarm system Alarm system

H - Electricity

01

H

340/192

H01H 3/00 (2006.01) G08B 25/12 (2006.01)

Patent

CA 1292299

ABSTRACT An alarm switch of the manual call-point kind has a wall-mounted box with a front plate which may be pushed in to operate an alarm - for example a fire alarm. Instead of being made wholly of glass or other frangible material as formerly, the front plate is effective to break a frangible area against a stop. The frangible area is one of several, so that the switch may be reset by moving the stop relative to the frangible areas so that it cooperates with another when one frangible area has been broken.

552203

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