Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1980-07-10
1982-08-10
Swann, III, Glen R.
Communications: electrical
Condition responsive indicating system
Specific condition
307117, 340565, 340693, 367 93, G08B 1322
Patent
active
043440711
ABSTRACT:
An electronic sensing device, operates to actuate a household lighting fixture in response to a sensed environmental condition such as sound or movement within a room. The device is provided with a receiver for sensing the particular environmental condition, a timer responsive to the output of the receiver, switching apparatus for switching on the household lighting fixture in response to the timer, and a power-providing circuit. The timer provides that the lighting fixture will remain on for a preselected time after sensing the environmental condition, and continually resets in the continued presence of the environmental condition. The switching apparatus switches the light fixture on in response to the timer output and further provides circuitry for varying the switched-on duty cycle of the lighting fixture in order to provide a dimmer control. The power-providing circuitry applies a portion of the leading edge of each half cycle of line current to power the circuitry of the sensing device.
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Heller Roger A.
Swann III Glen R.
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