G - Physics – 08 – B
Patent
G - Physics
08
B
340/124.2
G08B 1/08 (2006.01) H03K 17/96 (2006.01)
Patent
CA 1175929
TOUCH SENSITIVE SWITCH Abstract of the Disclosure: A switching device for connecting the phase terminal of a load to the phase terminal of an AC supply includes a conductive touch plate in a circuit which is completed upon contact by a person and in which current is caused to flow by virtue of the electric field induced in the body of the person when in proximity to an alternating voltage. A bistable circuit responsive to the induced current flow and switchable between two states is operatively connected to the gate of a triac for rendering the triac conductive during part of each cycle of the alternating voltage or rendering the triac nonconductive depending upon the previous state. Rectifier means are provided for utilizing the AC voltage to power the circuitry and addi- tional means are provided in the form of a zener diode and resistor to prevent the triac from being rendered conductive immediately following an interruption in the alternatating voltage.
380085
Arthurs & Garrett
Leviton Manufacturing Company Inc.
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