Switch in half-wave rectifier circuit

Claim 1

In an electronic oven, a circuit comprising: a. a transformer having primary and secondary windings, said primary winding being coupled to a power source, b. a magnetron including a heater, a cathode and an anode, said anode being connected to a first terminal of the secondary winding of said transformer, c. a capacitor connected between a second terminal of said secondary winding and the cathode of said magnetron, d. a rectifier having an anode and a cathode, e. a high voltage-control switch connected in series with said rectifier, said series-connected high voltage-control switch and rectifier being connected across the cathode and anode of said magnetron, the polarity of said rectifier being such that current is conducted from the connection of said seriesconnected circuit to the cathode of said magnetron to the connection of said circuit to the anode of said magnetron, and f. means operating said high voltage-control switch to open said rectifier circuit during a first predetermined time interval and close said rectifier circuit during a second predetermined time interval while said electronic oven is being used for cooking, said magnetron oscillating when said voltage-control switch is closed and not oscillating when said voltage-control switch is open.