Abstract: The invention concerns a disconnectable male connector for a communications network including connecting means between wires (43) corresponding to the lines of a communications cable (44) and the terminals of a female connector which are connected to the lines of the communications network when the male connector is inserted in the female connector and means (41) for locking the male connector to the female connector, wherein said connection means (46, 81, 100) and said locking means (41, 80) can separate if the cable (44) is pulled. Applications include the integrated services digital network.

Abstract: A method for producing a prestressed fiber-optic sensor of two superposed metal strips (2,3) sheathing an optical fiber (1) with the strips being secured to each other along their lateral sides to provide a sheath exerting a prestress on the optical fiber includes a first step of superposing the lateral sides of the strips and aligning the edges of the strips. The superposition of the sides is carried out so as to produce a desired prestress on the optical fiber after the sides have been secured together. In a further step, the strips are continuously welded to each other to unite the adjacent edges after superposition of their lateral sides. The welding is performed simultaneously along both sides of the strips and with the same input of energy. The invention also relates to apparatus for carrying out the method and a prestressed fiber-optic sensor produced thereby.

Abstract: The present invention concerns a high frequency radiating line for radiating electromagnetic energy in a frequency band and comprising at least one tubular conductor (23) surrounding a longitudinal axis (X) and having a plurality of apertures formed into a series of identical patterns (M1) repeated periodically with a period P along said line, characterized in that, when the operating frequency band is of the type [f.sub.r,(N+1)f.sub.r ], where f.sub.r is a given frequency and N is a positive integer greater than 1, each of said patterns (M1) comprises N apertures 0 to N-1 and satisfying the following equations: ##EQU1## where: the index k is an integer such that 1.ltoreq.k.ltoreq.N-1 and refers to the k'th aperture of one of said patterns (M1),z.sub.k is the distance between said k'th aperture and first aperture (F0) of the pattern,a.sub.k is the polariability of the k'th aperture,a.sub.o is the polarizability of the first aperture, ##EQU2## where E(x) designates the integer part of x, p.sub.