Abstract: The connector comprises a female element (12), a male element (14) and a body (16). The female element, made of conductive metal sheet or pipe, has a portion formed by fingers (21) having a certain degree of elasticity, which are normally spread apart when no external forces are applied. The fingers have retaining teeth (28) extending inwards. The male element has a shoulder surface (38) for engagement by the teeth of the female element. One element, male or female, holds the plug, and the other element, female or male, holds the socket. The body has a housing for the female element, comprising first and second communicating chambers, the first chamber housing the female element in a spread apart condition, and the second chamber housing the female element in a narrow, forced condition. Insertion of the male element with the shoulder surface thereof beyond the retaining teeth automatically locks the male element and the female element in a connected or wired position.

Abstract: An antenna has a housing at least one opening with a drum rotatably mounted in said housing perpendicular to the opening and a wave receiving stylus carried by the drum for projection from the housing through said opening. The stylus is a band preformed according to a given curved shape about its longitudinal axis with the band being sufficiently resilient so as to be flattened and wound up on the drum and being sufficiently flexible so as to assume a tubular configuration in cross-section in the absence of stress when in a position extended from the housing. Idler rollers are carried by the housing around the drum in spaced relation thereto to limit band sliding frictions with respect to the housing and guide elements are interposed between the idler rollers to promote a correct superimposition of the band spirals on and off the drum.