Electrical transmission or interconnection systems – Switching systems – Condition responsive
Patent
1997-02-11
1998-07-21
Shoop, Jr., William M.
Electrical transmission or interconnection systems
Switching systems
Condition responsive
307125, 307126, 307139, 307140, 327517, 324692, H01H 3500
Patent
active
057838755
ABSTRACT:
A touch sensor circuit is disclosed for sensing a person's touch and for switching power to an AC load. The touch sensor circuit includes a sense input circuit, logic circuit, power switching circuit and power supply/reference circuit. The power supply and reference circuit tracks the AC line-hot input, and supplies DC power to the circuit. The sense input circuit is configured such that when a person touches the touch input pad, a circuit is created between the positive voltage reference and earth ground, thereby generating an easily detectable voltage swing on an internal sensing node. The logic circuit senses the voltage variation on the sensing node and generates a pulse which toggles power to the power switching circuit and connected load.
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Ganjian Peter
Shoop Jr. William M.
The Lamson & Sessions Co.
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