Abstract: A contact casing (1) rolled from a spring plate blank with a rotary safety zone (30) is present for anchoring and centering of this winding contact in the contact hole of a plastic housing, which rotary safety zone has a centering section (40) encompassing the winding post (3) in the form of a ring and is connected firmly with it and has a clamping section (41). Lateral indentations (34a, 34b) act as spring elements by which the longitudinal seam (37) of the centering section (40) is held closed in the case of acting torques and radial forces. The clamping section (41) comprises clamping arms (42a, 42b) which are firmly connected by way of the base part (32) with the centering section (40) and the claws (44a, 44b) of which project beyond the periphery of the centering section (40).

Abstract: An electrical socket comprising an elongated, hollow socket body constructed of electrically conductive material and defining a plug receiving bore opening at one end thereof. The socket body includes means presenting a series of slits in the body that together define a longitudinally extending contact finger which has a free end disposed in proximal relationship to one end of the plug receiving bore. An elongated, annular spring cage is disposed in surrounding relationship to at least the portion of the socket body which includes the contact finger and includes means for biasing the contact finger toward and into the plug receiving bore. The biasing means includes means defining a series of intercommunicated slits in the spring cage that together present a collar surrounding the end of the socket body in proximate relationship with the contact finger and a longitudinally extending tongue having a free end disposed adjacent the collar and in contacting relationship to the free end of the contact finger.