Electric toasting machines with variable timing circuit

Details Electric toasting machines with variable timing circuit Electric toasting machines with variable timing circuit

1994-05-17

1995-05-09

Paschall, Mark H.

Electric heating

Heating devices

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

219497, 219518, 219514, 99329P, 99328, 99332, H05B 102

Patent

active

054142431

ABSTRACT:
A toasting machine comprising heating elements, an on/off switch for initiating a toasting cycle, a toast colour selection knob for setting a selected time period for a toasting cycle, a timing circuit arranged to measure the elapsed time since a previous toasting cycle and including time booster means, a control circuit responsive to the toast colour selection setting and the timing circuit, a connection line and plug for connecting the toasting machine to an electrical power supply so as to supply power to the heating elements on initiation of a toast cycle by the on/off switch and under control of the control circuit, a temperature measuring device arranged to measure the temperature of the toasting machine and supply a temperature representing signal to the control circuit, the control circuit being arranged to control the timing of a current toasting cycle in dependence both on the setting of the toast colour selection switch and on the timing circuit, so that the toasting cycle time period during which power is supplied to the heating elements is increased over the selected time period by one or more boost periods both if the elapsed time since a previous toast cycle exceeds a predetermined elapsed time and on the first toasting cycle after connection of the connection line to the power supply, except that if the temperature as measured by the temperature measuring device exceeds a predetermined temperature the control circuit acts in response to said signal so that it does not increase the selected time period by the boost period. Preferably there are first, second and third boost periods dependent on first, second and third elapsed times.

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