Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1998-05-12
1999-08-17
Hofsass, Jeffery A.
Communications: electrical
Condition responsive indicating system
Specific condition
340576, 340691, 200538, 200540, 200541, 200 16B, G08B 2300
Patent
active
059399899
ABSTRACT:
An electronic switch includes a rigid base, a circuit board supported by the base which includes an aperture therethrough defined, at least in part, by spaced apart conductive terminals of an electrically conductive circuit, a resiliently flexible casing attached to the base and overlying the circuit board, and a plunger attached to the casing and extending therefrom through the circuit board aperture. The plunger includes a conductive portion which is adjacent to the casing, and a non-conductive portion. The casing is resiliently biased so as to normally position the plunger such that the non-conductive portion thereof extends through the circuit board aperture. Depression of the casing, however, places the conductive portion within the aperture and into contact with the spaced apart conductive terminals to close the electrically conductive circuit. The electronic switch may be utilized in connection with, for example, a drowsiness warning device which includes a band securable about a wearer's neck. The electronic switch is positioned by the band below a wearer's chin for producing an alarm as the chin contacts and depresses the flexible casing so as to cause the electrically conductive circuit to close.
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Bang Richard M.
Hofsass Jeffery A.
Pham Toan N.
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