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1. (WO1996002902) EMERGENCY CONTROL APPARATUS

Pub. No.:    WO/1996/002902    International Application No.:    PCT/GB1995/001660
Publication Date: Feb 1, 1996 International Filing Date: Jul 13, 1995
IPC: G08B 1/08
G08B 7/06
Applicants: MARVELLY, John, Dunstan
Inventors: MARVELLY, John, Dunstan
Title: EMERGENCY CONTROL APPARATUS
Abstract:
A smoke alarm activated switch discrimates the characteristic high pitched pulsed sound of a smoke alarm and switches or controls mains power accordingly. The switch is powered from the mains and may be incorporated in a wide range of equipment such as conventional switches, sockets, timers, dimmers, etc. The switch may discriminate on the basis of one or more of frequency, pulse repetition rate, pulse duration, and the mark/space ratio of the sound from a smoke alarm.