Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1987-02-17
1989-08-08
Orsino, Joseph A.
Communications: electrical
Condition responsive indicating system
Specific condition
200 511, 439490, 335207, G08B 1314
Patent
active
048557196
ABSTRACT:
A power receptacle with alarm switch that is actuatable by a standard grounded three-prong plug to output a switch indication. The device consists of at least one three-prong receptacle wherein the third prong contact assures a common or ground connection upon insertion of a three-prong plug. A switch device is secured on the receptacle to extend an actuating arm adjacent the third prong hole in interfering position such that insertion and removal of the plug causes the third prong to move the actuating arm and produce a characteristic switch indication. An improved form of alarm switch uses a hermetically sealed magnetic switch in association with a spring-loaded plunger/magnet assembly to provide corrosion-proof switching.
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Hermetic Switch, Inc.
Jackson Jill D.
Orsino Joseph A.
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