Abstract: Method for connecting two groups of optical fibres provided with a sheath or protection coating and connector for effecting this method. The unstripped optical fibres of each group are located in longitudinal grooves in a support piece of a respective connector, with the ends of the fibres extending beyond the end of each support piece; the optical fibres are retained in the grooves in each support piece; the ends of the fibres extending beyond each support piece are stripped; the optical fibres are slided in said grooves into a position where parts of the stripped ends occupy respective parts of the grooves; the unstripped and stripped portions of the optical fibres are locked in this position; the end plane of each support-fibre assembly is polished and the two connectors are joined together.
Type:
Grant
Filed:
July 15, 1977
Date of Patent:
January 15, 1980
Assignees:
Societe d'Exploitation des Cables Electriques, S.A. des Cableries et Trefileries de Cossonay, Kabelwerke Brugg AG
Abstract: A metal wire to be coated with thermoplastic material is advanced at high speed, e.g. of 100 meters per minute, through a codirectionally moving mass of thermoplastic particles after having been heated to a temperature high enough to cause adhesion of these particles to the wire. The mass is mechanically entrained in a treatment chamber by an endless belt or the like at a speed close enough to that of the wire to hold the velocity difference therebetween below a threshold value, such as 30 meters per minute, above which an abrasive effect sets in which tends to detach already adhering particles from the wire. Upon exiting from the treatment chamber, the wire is reheated to fuse these particles into a continuous envelope and is then subjected to an electrostatic flocking operation for studding the envelope with radially projecting cellulosic fibers forming a velvety coating thereon.
Type:
Grant
Filed:
December 8, 1976
Date of Patent:
July 25, 1978
Assignees:
S.A. des Cableries & Trefileries de Cossonay, Societe d'Exploitation des Cables Electriques, Cableries de Brugg S.A.
Inventors:
Philippe Robert, Claude Guignard, Francis Stagoll
Abstract: A metal wire to be coated with thermoplastic material is advanced at high speed, e.g. of 100 meters per minute, through a codirectionally moving mass of thermoplastic particles after having been heated to a temperature high enough to cause adhesion of these particles to the wire. The mass is mechanically entrained in a treatment chamber by an endless belt or the like at a speed close enough to that of the wire to hold the velocity difference therebetween below a threshold value, such as 30 meters per minute, above which an abrasive effect sets in which tends to detach already adhering particles from the wire. Upon exiting from the treatment chamber, the wire is reheated to fuse these particles into a continuous envelope and is then subjected to an electrostatic flocking operation for studding the envelope with radially projecting cellulosic fibers forming a velvety coating thereon.
Type:
Grant
Filed:
August 15, 1975
Date of Patent:
January 24, 1978
Assignees:
S.A., des Cableries & Trefileries de Cossonay, Societe d'Exploitation des Cables Electriques, Cableries de Brugg S.A.
Inventors:
Philippe Robert, Claude Guignard, Francis Stagoll
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.
Type:
Grant
Filed:
November 26, 1975
Date of Patent:
December 21, 1976
Assignees:
SA des Cableries et Trefileries de Cossonay, Kabelwerke Brugg A.G., Societe d'Exploitation des Cables Electriques Systeme Berthoud Borel & Cie
Inventors:
Gerard Chevrolet, Claude Guignard, Maurice Poull