Alarm device responsive to movement of protected object, power s

Details Alarm device responsive to movement of protected object, power s Alarm device responsive to movement of protected object, power s

1980-06-10

1982-04-27

Waring, Alvin H.

Communications: electrical

Condition responsive indicating system

Specific condition

340650, 340652, 340568, G08B 1314

Patent

active

043273602

ABSTRACT:
An alarm adapted to be mounted on an object to be protected is provided with sensing means for sensing any one of (a) a movement of the protected object, (b) a disruption of an applied voltage source, and (c) a disruption of an alarm ground path. The alarm is further provided with signal generating and timing means to produce a two-frequency alarm signal for a selectable length of time.

REFERENCES:
patent: 3755778 (1973-08-01), Kennedy et al.
patent: 3836901 (1974-09-01), Matto et al.
patent: 3924254 (1975-12-01), Klebold et al.
patent: 4038635 (1977-07-01), Schotz

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