Timed switching circuit
First Claim
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1. A timed switching circuit for controlling the operation of an appliance comprising in combination:
- a. means connecting said timed switching circuit to an alternating current power supply;
b. an alarm timer means providing an audible alarm at predetermined time intervals;
c. a function timer means connected to said alarm timer means for providing an operational sequence at predetermined time intervals;
d. a power supply means connected between first and second sides of said timed switching circuit;
e. an on-delay timing means connected to said power supply means for producing a predetermined time delay before power is applied to said appliance from said alternating current power supply;
f. power-turn on means connected to said on-delay timing means for turning power on from said power supply means;
g. an off-delay timing means connected to said function timer means producing a time delay after power is disconnected through said power turn-on means;
h. a power turn-off means connected to said off-delay timing means for maintaining power during said time delay and subsequently turning off power from said power supply means;
e. snubber means connected to said power turn-on means to prevent same from turning on momentarily at the beginning of a timing cycle; and
j. an appliance control/indicator means connected to said appliance for controlling a function and indicating a state of operation of same.
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Abstract
A timed switching circuit includes timer means for timing an event, timer means for timing the length of an alarm signal, and timer means for timing delays prior to and immediately after an event is timed. The circuit also includes an appliance control/indicator means for controlling an appliance in response to a timed event and indicating the operational state thereof.
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Citations
8 Claims
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1. A timed switching circuit for controlling the operation of an appliance comprising in combination:
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a. means connecting said timed switching circuit to an alternating current power supply; b. an alarm timer means providing an audible alarm at predetermined time intervals; c. a function timer means connected to said alarm timer means for providing an operational sequence at predetermined time intervals; d. a power supply means connected between first and second sides of said timed switching circuit; e. an on-delay timing means connected to said power supply means for producing a predetermined time delay before power is applied to said appliance from said alternating current power supply; f. power-turn on means connected to said on-delay timing means for turning power on from said power supply means; g. an off-delay timing means connected to said function timer means producing a time delay after power is disconnected through said power turn-on means; h. a power turn-off means connected to said off-delay timing means for maintaining power during said time delay and subsequently turning off power from said power supply means; e. snubber means connected to said power turn-on means to prevent same from turning on momentarily at the beginning of a timing cycle; and j. an appliance control/indicator means connected to said appliance for controlling a function and indicating a state of operation of same. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification