Abstract: A high frequency heating apparatus has an oven-defining structure having an access opening in communication with a heating chamber defined therein, and a hingedly supported metallic door for selectively opening and closing over the access opening. The door has its peripheral area formed with a groove open towards the heating chamber. The bottom of the groove is situated frontwardly of the door with respect to the apparatus. An outerside wall extending from the groove is formed with a plurality of cutouts and a plurality of generally rectangular openings alternating with the cutouts. Each of the cutouts and each of the rectangular openings have one edge positioned on one side of a setup portion, protruding from the bottom of the groove, adjacent the oven-defining structure. The outer wall has a portion bent to protrude transversely into the groove to define a partitioning wall.

Abstract: A high frequency heating apparatus has an oven-defining structure having an access opening in communication with a heating chamber defined therein, and a hingedly supported metallic door for selectively opening and closing over the access opening. The door has its peripheral area formed with a groove open towards the heating chamber. The bottom of the groove is situated frontwardly of the door with respect to the apparatus. An outerside wall extending from the groove is formed with a plurality of cutouts and a plurality of generally rectangular openings alternating with the cutouts. Each of the cutouts and each of the rectangular openings have one edge positioned on one side of a setup portion, protruding from the bottom of the groove, adjacent the oven-defining structure. The outer wall has a portion bent to protrude transversely into the groove to define a partitioning wall.

Abstract: In a microwave heating oven, a safety switch 301 is disposed in an external position relative to a heating chamber 100. A displacement rod 302, which is made of polyprophylene or the like low dielectric constant plastic substance, is disposed through and across the heating chamber 100. Displacement rod 302 serves as a thermal switch, so that at an abnormally high temperature displacement rod 302 melts down, thereby opening the safety switch 301 and disengaging the microwave generator.

Abstract: An acceleration sensing device comprising an electrically conductive annular conductive support ring, an electrically conductive sphere to be placed on the upper inner periphery of said support ring, and an electrically conductive contact disposed in the neighborhood of said ball, thereby the device being capable of detecting acceleration in any direction by the use of the electrical conduction between the support ring and the contact through the ball.