H - Electricity – 05 – B
Patent
H - Electricity
05
B
327/2.51
H05B 6/68 (2006.01)
Patent
CA 1177900
9D-RG-14062 DELAY-START ARRANGEMENT FOR A MICROWAVE OVEN ABSTRACT OF THE DISCLOSURE A circuit for turning on the constantly energized loads in a microwave oven in response to the initial energization of the magnetron to begin the cooking operation. The circuit includes a delay start relay having a relay coil and a first normally closed relay switch connected in series with a mag- netron switching element across a source to respond to the initial turn-on of the magnetron by the switch- ing element. The relay coil also controls a second normally open relay switch connected to close, in response to energization of the relay, a current path including at least one constantly energized microwave oven load. The second relay switch also closes a holding current path for the relay coil to maintain it in an energized condition during the remainder of the cooking cycle. The first relay switch opens after the second relay switch has closed to electrically isolate the relay coil from the switching device. At the end of the cooking cycle a main power switch is opened in response to a signal from the electronic control system to terminate the cooking operation and to reset the delay start relay.
390547
Company General Electric
Eckersley Raymond A.
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