Abstract: A combined terminal secondary lock and seal for securing a terminal within a connector cavity in sealed relation comprises a sleeve surrounding the end of the wire and a portion of the terminal and abutting against the widened terminal contact portion. The sleeve includes a plurality of apertures adjacent the insulated portion of the wire, which apertures define a plurality of axially aligned spaced slats sufficient to provide axial rigidity to the sleeve. A resilient seal ring is integrally molded into the apertures and extends outwardly into circumferential sealing engagement with a cavity of the connector and inwardly into circumferential sealing engagement with an insulated portion of the wire. A sleeve retainer is provided on the connector for securing the sleeve and terminal against axial movement.

Abstract: A secondary terminal lock assembly for preventing the removal of an electrical terminal from a terminal block. The lock assembly includes a lock element which is inserted into a terminal block cavity adjacent a conventional female spring locked terminal. The lock element includes a notched locking tongue which engages a locking ear of the terminal block cavity and is held into engagement with the ear by the terminal spring. Shoulders on the locking element prevent withdrawal of the terminal from the terminal cavity. The locking element when properly seated can be seen from the plug side of the terminal block and thus provides a visible indication that the terminal is in a locked condition.

Abstract: A modular construction of an interface board for mounting electrical connectors comprises a plurality of interlocked modular blocks on which the connectors are mounted. Each side face of each block comprises one or more sets of locking elements which engage with a mirror-image set of locking elements on another of said blocks to prevent relative lateral motion between the blocks or structures. Motion of the blocks or structures away from each other, in a direction normal to their mated side faces, is prevented by providing a tapered mortise in each of said side faces, the adjacent mortises of adjacent interlocked blocks or structures being in mutually confronting, aligned relationship to each other so that the tenons of a double dovetail wedge can be inserted into both mortises simultaneously to hold them in fixed position.