Timing control apparatus and circuit

Details Timing control apparatus and circuit Timing control apparatus and circuit

1980-04-10

1983-07-26

Paschall, M. H.

Electric heating

Heating devices

With power supply and voltage or current regulation or...

219505, 219491, 219514, 99329R, 99329P, H05B 102

Patent

active

043956211

ABSTRACT:
A timing control apparatus and circuit for use in a toaster or other device, such as an oven, includes electronic solid-state circuitry including a thermistor operating in conjunction with a metal oxide semiconducter (CMOS) wherein when the predetermined voltage or heat buildup is attained, a condenser is charged to positive to activate the timing circuit, which, in turn, activates a SCR, shorting a full wave bridge to deactivate the heating elements and close a normally open solenoid, which unlocks a mechanical latch and permits the toast to be ejected. The device employs low operating current, expends no energy except at the moment of triggering the solenoid and is capable of being used as original equipment or to retrofit existing units.

REFERENCES:
patent: 3275802 (1966-09-01), Vandivere et al.
patent: 3431400 (1969-03-01), Ilda et al.
patent: 3581061 (1971-05-01), Chambers
patent: 3898423 (1975-08-01), Taylor et al.
patent: 3956978 (1976-05-01), Burley
patent: 4170932 (1979-10-01), Lalancette
patent: 4245148 (1981-01-01), Gisske et al.

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