Abstract: The problem which has existed heretofore, of maintaining the protection of optical fibers under all circumstances from axial traction loads in cables used for the transmission of data by means of a number of signal transmitting optical fibers by means of electromagnetic radiations of wavelengths under 1 mm, essentially in the longitudinal sense of the fibers and the related problem of being able to exclude completely, even under extreme working conditions, the danger of rupture of the optical fibers during thermal expansion and very strong bending of the cable have been solved by guidance means (7, 9, 10 for the guidance of the fibers (8) on paths (12) located on the inside of at least one cylinder-jacket-shaped shell (13) and assuming an essentially wave-shaped course with excursions (13) in relation to imaginary median lines (11) attributed to each and situated inside the cylinder-jacket-shaped shell (13) in a position which is essentially parallel to the cylinder axis (53) of said shell and which are freel

Abstract: An optical-fibre connector comprises a support piece 1, a first locking piece 2 and a second locking piece 3. Locking pieces 2 and 3 are respectively fixed to the support piece 1by screws 4 and 5 which are engaged in cylindrical bores containing sleeve of elastomer material. The locking piece 2 comprises at its base two bearings 8 and 9. To connect two series of optical fibres, two identical connectors are disposed end to end and connected by two spindles 10 comprising a threading 11 which engages in a metallic sleeve 12 containing a sleeve 13, made of an elastomer material. This assembly permits absorption of vibrations and limitation of the clamping in order to avoid breaking of the optical fibre during use or connection of the two series of optical fibres.

Abstract: A cable for telephone or other communication circuits comprises a number of conductor arrays, specifically pairs or quads of helically intertwined conductors, each conductor having a metal core coated with a thermoplastic sheath in which a multiplicity of short cellulose fibers are embedded; the fibers have an average length of about 1 mm and project generally radially from the sheath over the greater part of their length. The fibers of the twisted wires interpenetrate and form a mat in the intervening spaces which swells in the event of water penetration through a defective envelope, thereby limiting the propagation of moisture along the cable.