Abstract: A conical annulus formed on a pacer lead body engages a deformable retention ring formed on the connector block to hold the lead in the pacer.

Abstract: A mounting arrangement for a circuit board on the neck of a cathode ray tube includes a guide member formed in the cathode ray tube base. The guide member is formed to have a surface extending perpendicular to the tube longitudinal axis. The circuit board incorporates a socket having a channel for receiving the guide member for aligning the socket on the tube base. A portion of a locking piece is inserted through a hole in the socket wall in order to abut the perpendicular surface of the guide member to prevent removal of the socket from the tube base. A second portion of the locking piece forms a hook which cooperates with the socket to prevent inadvertent removal of the locking piece.

Abstract: An institutional television system includes a source of standard broadcast composite television signals, an auxiliary source of RF carrier signals conveying sound information exclusive of video information, and a television receiver. The television receiver selectably processes the composite television signal including the sync component thereof in a normal mode, and selectably processes the auxiliary signals in an audio mode. The receiver comprises a video signal processing channel that is similarly energized in both the normal and audio modes. The video channel is controlled to enable light output from the kinescope of the receiver when the video sync component is present in the normal mode, and to inhibit light output from the kinescope when the video sync component is absent in the audio mode.

Abstract: A chassis for a television receiver is provided which is adapted to operate in cooperation with any one of a number of electrical subsystems which perform similar functions but have differing signal and power requirements, such as tuners, receiver controls, et cetera, and are located remote from the chassis within the receiver. Each subsystem is coupled to a connector by a cable. The connector includes a row of contacts located in symmetrically spaced holes in the connector. One of the holes is blocked and serves as a keying indication. Mounted on the chassis is a row of similarly symmetrically spaced terminals, with one terminal missing from the row. A connector can only be mated with the terminal row when the blocked hole in aligned with the missing terminal location.