Abstract: A mechanical fuse device for an access cable to a submerged equipment housing in a cable transmission link, said access cable including a tube enclosing items that provide transmission and being equipped with a longitudinal sealing device, wherein the mechanical fuse device comprises means for responding to traction exerted on the cable upstream relative to the equipment housing by retaining a portion of the cable upstream from the sealing device and exerting a crushing effect on the tube.

Abstract: This device is interposed between two lengths of an optical fiber lead-in cable comprising a core constitution by a small diameter stainless steel tube containing a bundle of optical fibers comprises: a metal plug which is brazed to the end of one length of tube and which includes a barrel including a cavity whose diameter is not less than the diameter of the bundle of fibers and whose outside surface has a diameter which is greater than the diameter of the tube, said outside surface being provided with transverse grooves; a block of epoxy resin molded both over a portion of a bundle of fibers and over the barrel; the resin covering portions of the bundle both inside and outside the barrel; a sleeve fixed in sealed manner to the other length of tube; a clamping ring; a viscous hydrophobic liquid injected into the space remaining empty between the sleeve and the block of epoxy resin; and epoxy resin injected into the cavities inside the sleeve.

Abstract: A longitudinal sealing device for the core of an optical cable formed by a bundle of optical fibers disposed in a tube, said device being placed at a location where the tube has been cut, and comprising: a block of plastic material molded over the optical fibers of the bundle and over the end of one of the tube portions referred to as the first portion; a sleeve threaded over the block of plastic material and fitted over the end of the other tube portion referred to as the second portion to which it is fixed; and a plug threaded over the first tube portion against the block of plastic material and fixed in sealed manner to said first tube portion, and fixed to the sleeve whose opening it closes.