Randall Scott Parker

US Patent:

43956211, Jul 26, 1983

Filed:

Apr 10, 1980

Appl. No.:

6/127334

Inventors:

Randall W. Parker - Norton OH

International Classification:

H05B 102

US Classification:

219492

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.