CABLE DE COMMUNICATION OPTIQUE PRESENTANT UN GUIDE D'ONDE LUMINEUSE ET UN RECOUVREMENT SECONDAIRE RESISTANT A LA TRACTION

The invention relates to a telecommunication cable consisting of an optical fibre (LWL) made from glass (1), which serves the purpose of signal transmission, a concentric buffer tube (2) (primary (cushion) coating), which protects the glass surface and rests on the optical fibre (1), and a second buffer tube (3, 4) (secondary coating), which envelops said primary coating (2). The object is to specify such a cable with as high a tensile strength as possible, as small a diameter as possible and as low a weight as possible. This is achieved in essence by constructing the tension-proof buffer tube (3, 4) from at least 500 tension-proof fibres (3) with a fibre diameter of at most 15 mu m. In this arrangement, these fibres (3) are held together in the circumferential direction by means of a plastic (4). The invention is applied principally in remote control cables. L'INVENTION CONCERNE UN CABLE DE COMMUNICATION COMPORTANT UNE FIBRE OPTIQUE 1 EN VERRE SERVANT A LA TRANSMISSION DE SIGNAUX, UNE ENVELOPPE PRIMAIRE 2 EN MATIERE SYNTHETIQUE S'APPLIQUANT CONTRE LA FIBRE OPTIQUE 1 ET UNE ENVELOPPE SECONDAIRE RESISTANT A LA TRACTION 3, 4 EN MATIERE SYNTHETIQUE ENTOURANT LADITE ENVELOPPE PRIMAIRE 2. L'INVENTION VISE A CONFERER A UN TEL CABLE UNE RESISTANCE A LA TRACTION AUSSI ELEVEE QUE POSSIBLE, UN DIAMETRE AUSSI REDUIT QUE POSSIBLE ET UN POIDS AUSSI FAIBLE QUE POSSIBLE. CELA S'OBTIENT PAR APPLICATION D'UNE ENVELOPPE SECONDAIRE RESISTANT A LA TRACTION 3, 4 PRESENTANT AU MOINS 500FIBRES RESISTANT A LA TRACTION 3, D'UN DIAMETRE D'AU MAXIMUM 15MM, CES FIBRES 3 ETANT MAINTENUES A L'AIDE DE MATIERE SYNTHETIQUE 4 DANS LA DIRECTION PERIPHERIQUE.APPLICATION : CABLE DE TELECOMMANDE.