Les Cables De Lyon

Alcatel Cable

Louis Le Davay

Robert Jocteur

The method and the corresponding installation detect sealing faults in metal protective tubes for protecting cables having electrical and/or optical conductors, referred to as 'protected components', embedded in a sealing material filling the tube. The method consists in priming said sealing material with a detectable 'test' gas either prior to or during injection of said material into said tube in a first station for enclosing the protected components inside the tube, and in causing said tube, filled in this way and optionally heated, to advance continuously past a detector, or inside a detection chamber of a second station containing the detector, either directly after the tube has been filled or at a subsequent stage. Application: land or under-sea cables, in particular for monitoring fluid-tight protective microtubes for protecting optical fibers.

Method of detecting sealing faults in a protective tube for protecting

Coating for optical fibres comprising at least one layer of a resinous composition which hardens in the cold and in a few seconds upon contact with a gaseous catalyst applicable more particularly to optical fibres intended to be assembled together in a cable.

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Louveciennes, France

Louis Le Davay