Closure alarm for containment chambers for dangerous materials

Details Closure alarm for containment chambers for dangerous materials Closure alarm for containment chambers for dangerous materials

1988-07-11

1990-03-20

Orsino, Joseph A.

Communications: electrical

Condition responsive indicating system

Specific condition

340693, G08B 1308

Patent

active

049104977

ABSTRACT:
An alarm device is disclosed to indicate the opening of an access element of a containment chamber carrying dangerous materials, such as a drawer or cupboard door, by children or similar intellectually unsophisticated persons. The alarm device provides two switches that are sequentially activated by a pivotally movable, externally projecting, wedge shaped sensor that moves outwardly to cause alarm annunciation at, or at a predetermined time after activation, if not deactivated by further outward manual motion before or after alarm annunciation. The alarm device is battery powered and operated by solid state electronic circuitry that is contained in a small compact casement that serves as a mounting means.

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