Abstract: A microwave diode tuning circuit including am IMPATT diode holder of coaxial form and an adjustable capacitor connected in a parallel resonant circuit by microstrip transmission line. The tuning circuit includes a stabilization network and a bias insertion network. Optionally, the tuning circuit may include a hybrid junction for coupling two such diode tuning circuits together. the diode holder includes an internally-externally threaded sleeve providing means for continuously adjusting, through a limited range, the inductance of the resonant circuit.

Abstract: The speaker grill is a part of a molded plastic member which may form a wall of housing for a device which includes an audio transducer. The plastic member includes provisions for supporting the audio transducer adjacent the grill, which has openings for the transmission of sound. The grill has stress regions in which there are no openings, which are in tension when the grill is flexed to thereby increase the strength of the grill. The stress regions may extend across the grill in an "X" pattern, or in any other pattern wherein one of a plurality of such regions extends transversely with respect to another region. The openings for sound transmission may be slots extending from the sides of grooves, which form labyrinth openings so that there is no direct passage through the grill, thereby tending to prevent entry of undesired objects.

Abstract: Socket for use on a circuit board which can be eyeletted to secure the socket in fixed position on the board with the head of the socket engaging the board. The head is shaped, as with flat sides, so that a vent passage extends from the space for solder between the socket and the opening in the circuit board. The head has a top surface at a fixed height above the board, and has a tapered opening to receive a plug-in connector pin. The circuit board structure, with the socket soldered to the conductor on the inside surface of the opening in the circuit board, provides a good electrical connection to the socket.

Abstract: A connecting and latching mechanism in an electronic apparatus is activated by a portion of the housing of a complementary electronic device as it is inserted for interconnection and charging. Varying sizes of devices can be accommodated. Three rotatable elements, two pawls and a connector arm, are mounted on a single base plate. One pawl keeps the connector arm from being damaged before device insertion and helps position the device upon insertion. A connector block on the connector arm is rotated into position for contacting the terminals of the device by a second portion of the device housing. When the connector block is in full contact with the terminals, the connector arm is latched by another pawl. A lock must be deactivated by key or manually operated button to release the latching pawl, the connector arm and the inserted device. Rotatable charging contacts provide scouring motion at the contact points and also accommodate devices of varying lengths.