Alarm device

Details Alarm device Alarm device

1974-07-22

1976-02-10

Caldwell, John W.

Communications: electrical

Systems

Signal box type

116114F, 734215R, G08B 2500

Patent

active

039381277

ABSTRACT:
A device adapted to be associated with a fire alarm box or the like to assist in the identification of a person who actuates the mechanism of an alarm box has an evacuated container disposed to entrap air from around the person when the vacuum is broken and a means responsive to the actuation of the mechanism for opening the container to the atmosphere.

REFERENCES:
patent: 3144850 (1964-08-01), Rosenberg
patent: 3817108 (1974-06-01), Principe

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