Abstract: This invention is directed to an improved connector for turn-knob 3-way switched medium base lamp holders. By means of the improved structures forming the connecting holes, through which the electrical wires are inserted, to match the spring force of the connecting springs located within the lamp holder body. The electrical connection is made by the pinching action of the connecting spring against the electric wire through the holes on the top of the lamp holder body. Improved performance of this electrical connection is achieved by the grooves and bends formed in the connecting spring for applying sufficient force to provide a good electrical connection without deformation of the wire.

Abstract: An electrical push-pull connector which includes a housing (1) having a pair of slots (11 and 12) formed through a top surface thereof for insert of a pair of electrical leads (A and B). An insulation disc (2) is secured to the housing (1). A screwshell member (3) is secured to the housing (1) and the screwshell member (3) and the insulation disc (2) are rivetted to the housing (1). A displaceable actuation mechanism is provided for electrically actuating the connector system. The displaceable actuation mechanism includes a longitudinally extending and displaceable push-pull stem member (4) which extends through the housing (1). The push-pull stem member (4) has coupled to it an electrically conductive sliding brass member (42) which is displaceable within a central slot formed in a housing (1). A coil spring (43) contacts the stem member (4) for biasing the stem member (4) in a predetermined direction.