Matsushita Electric Industrial Co., Ltd.

Chikao Urashima

Junzo Tanaka

Toshio Kai

Masatomo Orita

A high voltage switch for use in a microwave oven is disclosed which switches a high voltage by an external electric signal. The high voltage switch includes a slider guide chamber of insulative material between a contact making and breaking chamber for switching the high voltage and an electromagnet device to which a low voltage is applied and which serves as a power source for making and breaking the contact, so that the high voltage section is isolated from the low voltage section. An insulative slider extends through the slider guide chamber, and an armature which is directly driven by the electromagnet device and a conducting movable member having a movable contact mounted in the contact making and breaking chamber are linked by the insulative slider. The armature and the conducting movable member are pivotably mounted at their ends so that the drive operation by the electromagnet device is amplified to break the contact. As a result, a small electromagnet device of the A.C. drive type by used resulting in the remarkable improvement of insulation ability, durability and reliability and a simple and compact structure.

High voltage switch for cooking apparatus

A microwave oven equipped with a rotary table for placing food material to be cooked thereon in which the rotational center of the rotary table within the heating chamber is offset toward the rear wall of the heating chamber from the central portion of the distance between the inner surface of the door and the rear wall of the heating chamber, that distance being larger than the inner width of the heating cavity for preventing the danger of electric wave leakage resulting from breakage of a shielding plate and its reinforcement in the oven door due to contact of the food material or a spit carrying the food material with such reinforcement and resultant spark discharge.

Microwave oven

A microwave oven is provided with an automatic timer-controlled output power controlling system, the microwave oven comprising

A microwave oven providing the combination of dielectric heating by the use of microwaves and resistive heating for scorching the surface of a food. An isolation chamber for accommodating an article to be heated by a resistive heater is formed adjacent to the resistive heater provided in a heating cavity. When heating by the resistive heater is desired, the article to be heated is accommodated in the isolation chamber so that it is heated either both by dielectric heating and resistive heating or solely by resistive heating for scorching in an effective manner and at the same time minimizing the contamination of the heating cavity. In this manner, the application of the microwave oven may be widened and the usefulness of the microwave is enhanced.

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Nara, Japan

Chikao Urashima