Cordless remote controlled burglar proof device

Details Cordless remote controlled burglar proof device Cordless remote controlled burglar proof device

1986-01-30

1988-06-14

Levy, Stewart J.

Communications: electrical

Condition responsive indicating system

Specific condition

G08B 1308

Patent

active

047514990

ABSTRACT:
A cordless remote controlled burglar proof device including a transmitter and a receiver, wherein the transmitter is controlled by a reed switch corresponding to a magnet. The reed switch and magnet are installed at door/window wing and frame respectively. When the reed switch senses the magnetic field of the magnet, then the circuit remains passive. As soon as the door/window is opened, the reed switch is no longer activated by the magnet, the transmitter is triggered to transmit an ultra high frequency electromagnetic signal to trigger lighting device or alarm upon receipt of the signal by the receiver.

REFERENCES:
patent: 3769556 (1973-10-01), Feldman
patent: 3986183 (1976-10-01), Fujiwara
patent: 4160972 (1979-07-01), LaMell et al.
patent: 4209777 (1980-06-01), Morrison
patent: 4232309 (1980-11-01), Dillitzer
patent: 4292629 (1981-09-01), Kerr et al.
patent: 4438430 (1984-03-01), Young et al.

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