Abstract: A unitary molded socket provides mounting for non-temperature compensated crystals, a resistor heating element for each crystal, and a thermistor. Each heating element is positioned adjacent a crystal housing for preventing the housing temperature from going below a given temperature. The thermistor is thermally coupled to one of the resistors for sensing its temperature and electrically coupled to control circuitry for providing the appropriate heating current to the resistor heating elements. A spring clip biases each crystal against its resistor, clamps it into the socket and is pivotable for replacement of components.

Abstract: A housing for a mobile transceiver has integrally molded aligning and locking features to allow assembly without tools. As the metal support frame and attached printed circuit board enter the housing, short legs on the lower edge of the frame provide support and positioning for guiding the edges of the PC board into molded guide rails along the inner side walls of the housing and into molded locking clips on the inner front wall of the housing. The top rear of the housing is molded with a slight concave bow. The top and bottom rear edges of the housing have ramp portions for admitting the rear of the chassis. As the frame is forced home, a portion of the top rear of the frame pushes on the upper ramp, forcing the top of the housing to yield. Tabs on the bottom rear of the chassis ride up the lower housing ramp and are forced into slots in the housing bottom by the bias of the bowed housing top section.