Abstract: An enclosure (10) for protecting and dissipating heat from telecommunications repeaters (12). The enclosure includes a plurality of card-receiving sleeves (14) for receiving repeater cards; at least one heat sink manifold (16) in contact with the sleeves for conducting heat from the sleeves; at least one outer panel (28) in contact with the heat sink manifold for conducting heat from the manifold; a removable cover (40) configured for sliding over the outer panel to protect the cards from exposure to the elements; and at least one biasing mechanism (112) operably coupled with the outer panel for biasing the outer panel into physical contact with the cover when the cover is placed thereover to improve conduction of heat from the outer panel to the cover.

Abstract: An enclosure for electronic circuits intended to operate at great depths beneath the sea in which the circuits are protected from stresses induced by the accumulation of mechanical tolerances during assembly, from shock during transportation, and from deformation of the enclosure at great pressure. The circuits being accessible in their final configuration during testing before insertion into the enclosure and sealing. Cable lengths within the enclosure are minimized to ensure reliability.

Abstract: A hermetically sealed fiber optic feedthrough module which comprises a metal or other rigid material connector feedthrough or sleeve feedthrough with a single fiber optic member or with a multitude of optical fibers extending through and protruding out of either side of the connector feedthrough or sleeve feedthrough and a pressure-blocking sealant material of polycrystalline which surrounds the fiber optic member(s) and provides a seal between the fiber optic member(s) and the inside surface of the connector or sleeve feedthrough. The feedthrough module is made by positioning the fiber optic member(s) through the connector or sleeve feedthrough and applying the polycrystalline sealant material between the fiber optic member(s) and the connector or sleeve feedthrough inside diameter to fill all voids between the fiber optic member(s) and connector or sleeve feedthrough.

Abstract: A fiber optic hull penetrator comprises a penetrator insert and a penetra plug that each have fiber alignment inserts mounted, molded or adhered to them. The penetrator insert and penetrator plug are designed to provide strain relief to the cable, spring loading to the fiber alignment inserts, and a waterproof pressure boundary seal when subjected to the submarine ocean and combatant environment. Each fiber alignment insert is a solid slug of material to which anchor pin holes, strength member holes, locating key holes have been added to which suitable components are affixed or inserted.

Abstract: A combination seismic cable handling loop and electric splice includes a U-shaped elastomer member arranged to be hung on a hasp during transportation and storage, and an integrally formed cylindrical elastomer body on the lower end of the U-shaped member which encloses a splice card by which electrical conductors in the end portions of seismic cable sections are joined, such end portions extending through the outer portions of the body which provides strain relief.

Abstract: A system of impedance matching is provided to match the total impedance of the cable system to the total impedance of the powered elements such as the repeaters. The source impedance of the power supplies may be considered as part of the cable impedance. By matching impedances, the source voltage for driving the electronics is advantageously minimized.

Abstract: A repeater access cable contains transmission members enclosed in a protective tube which is in turn covered by a sheath, and which has a free end making a connection to a splice box. The free end is equipped with a coupling fixed on the protective tube stripped of its sheath. The repeater access cable coupling screws onto an entrance of the splice box and is fixed by crimping and gluing that end portion of the coupling which remains outside the splice box onto the protective tube. The connection has application to an optical cable under-sea link.

Abstract: A buoyant cable, particular for magnetic minesweeping applications, comprising a bundle of electrically conductive tubes (1) with an overall electrically-insulating sheath (4), the tubes providing buoyancy, strength and electrical conductivity for the cable. The sheath may have an internal reinforcing braid.

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: A flexible termination between a submersible repeater housing and a submarine cable comprises a double ball link bar (20) and a cooperating socket (12) coupled to the repeater housing (1) and a similar socket (11) coupled to the cable. This enables a compact lightweight flexible termination having a large angle of flexure. In an alternative embodiment a double gimbal arrangement is used.

Abstract: A particular embodiment comprises:a rigid body which is closed in watertight manner at both ends;six thermally conductive rigid receptacles each having a face which is complementary in shape to the shape of the inside wall of the body, the receptacles containing electronic circuits;layers of thermally conductive flexible materials disposed between the wall and the faces of the receptacles;supports each supporting two receptacles;a fixed ring integral with the body;a removable ring fixed to the fixed ring; andfixing devices each including a screw, resilient washers, and an insulating sleeve, thereby exerting outwardly directed radial forces when the screws are screwed radially into the removable ring.The housing is suitable for the repeaters of undersea connection cables.

Abstract: A bend restrictor for an optical fibre cable comprises an elongate sleeve-like member (5) having an axial through bore for accommodating the cable (1a, 1b), and a coupling ring (6) for fixing the sleeve-like member to a rigid housing (4) from which the cable extends. The sleeve-like member (5) is provided with a plurality of longitudinal bores (7), into some or all of which can be fitted stiffening rods (8). By varying the number and lengths of the stiffening rods (8), the rigidity of the sleeve-like member (5) can be varied to suit the particular structure of the cable (1a, 1b).

Abstract: A communications cable (20) comprising a core (22) of at least one transmission media and a plastic jacket (34) includes provisions for preventing the movement of water within the cable. The cable includes a strength system (32) including longitudinally extending fibrous strength members (32-33) having a relatively high modulus and having water blocking provisions. In one embodiment, each fibrous strength member is treated with a superabsorbent liquid material which when dry fills interstices and covers portions of the exterior thereof. In another embodiment, a filamentary strand material comprising a water swellable fibrous material is wrapped about each fibrous strength member.

Abstract: An electronic circuit housing primarily applicable to undersea transmission-line repeater equipment includes a pressure-resistant tubular steel shell provided with water-tight end walls and containing a cylindrical assembly of frames having the shape of cylindrical sectors. Each frame is attached at one end to a radial flange of the internal shell wall and at the other end to an expandable collar provided with sliding wedges and locked by expansion in the internal shell wall. The fastening system facilitates mounting and accurate centering of the frames within the tubular shell, thereby guaranteeing a constant thickness and therefore uniform thermal conductivity of the interface between frame and tubular shell.

Abstract: An arrangement is provided for the connection of an intermediate repeater for submarine cables, whereby the intermediate repeater is looped into the signal lines of a main cable and is connected to supply lines. The intermediate repeater is looped via an umbilical cord cable which branches off from the main cable.

Abstract: This articulated cable head includes a universal joint whose support (4) and ring (5) are made of fiber and epoxy resin laminates obtained by winding threads. The universal joint head (6) is spherical in shape and is made, together with an oscillating arm (7) which extends therefrom, as a single piece of cuproberyllium alloy. The oscillating arm (7) carries a tubular stop part (8) made of fiber and epoxy resin laminate obtained by winding threads, which is surrounded by a rubber sleeve (80, 81, 82) providing a transition in diameter, and which is hollowed out by a cavity serving as a housing for an anchor part (9) attached to the end of a line cable (2).

Abstract: A flexible, high pressure housing is included in an equipment encloure between sections of a signal communication cable. The housing includes an axially compressed length of corrugated tubing in which the corrugations have been collapsed against the another. Housing ends are sealed to maintain a predetermined interior pressure in spite of variations in pressure outside the housing. Also included in the enclosure are structures for applying the outside pressure to the housing so that it is resiliently transversely flexible in response to similar outside and inside pressures but rigid in response to outside pressures much greater than inside pressures.

Abstract: A hollow cylindrical, watertight casing housing optoelectronic repeater components, having optical fibers extending therefrom, and having a bore in which a tension resisting rope is received and is insulated from the wall of the bore. The casing is enclosed by a water-tight, tubular box which has a pair of cylindrical bodies extending therefrom, one at each end of the box. Each cylindrical body has a centrally disposed length of rope surrounded by polymeric material in which optical fibers are embedded, and the polymeric material is surrounded by a metallic sheath. The optical fibers of the cylindrical bodies are connected within the box to the optical fibers extending from the casing. The lengths of rope of the bodies are mechanically connected at one end respectively to opposite ends of the rope in the bore and at the opposite end respectively to ropes of submarine optical fiber cables having similar ropes, optical fibers and a metallic sheath.

Abstract: The invention relates to undersea cable transmission links including submerged repeaters, and more particularly it relates to a housing for such a repeater. The repeater housing includes a very rigid, watertight metal box (12) coated with an external polyethylene sheath (124, 125, 126) preventing the box from coming into contact with sea water, and electrically isolating it from the sea environment. The coated box is placed in a tubular casing (10) which is very strong in traction. The repeater includes a metal sleeve (130) placed inside the tubular casing (10) over the outer sheath of the metal box (12) and provided with studs (11) passing through the tubular casing (10) via suitable openings. The sleeve reduces the thermal resistance of the housing by short circuiting the thermal resistance of the tubular casing to a considerable extent.

Abstract: A mechanical fuse for a cable connection tail of a submarine repeater in a cable transmission link, said cable connection tail extending from a case for repeater equipment, having a "free" end for connection to the head of a line cable fixed to the repeater when the link is laid, and including a tube which encloses the transmission-providing elements. The mechanical fuse comprises a plug (40) threaded over and fixed to the end of the tube (30) at the free end of the cable connection tail, a ring (41) fitted over the plug (40) and free to escape from the plug (40) in a direction running away from the cable connection tail, and mechanically fixed to the cable head, and a set of pins (42) transversely connecting the ring (41) to the plug (40) and having a cumulative shear strength which is less than the breaking strength of the tube of the cable connection tail.

Abstract: A method and apparatus of making a splice in a geophone cable for providing a weatherproof cable splice with maximum cable break strength. The ends of each of the cables are soldered to a printed circuit board to provided the necessary cable strength. The printed circuit board is covered by a silicone rubber boot which sealingly engages the ends of each of the cables on either side of the printed circuit board to insure moisture protection.

Abstract: An optical repeater for a submersible transmission system has a steel housing and a modular assembly carrying the electronic and opto-electronic components. Each module (20) of the assembly has heat conductive electrically insulating devices (30 to 33) secured to the periphery of the module (20) and embracing the inner surface of the housing (1). Each device comprises a resiliently biassed metal element (44).

Abstract: An optical repeater for an undersea telecommunications system has a tubular casing (1) closed by a bulkhead (2) with a tail cable gland (2a) providing a common feed through for electrical power conductor (39) to power the regenerator and for optical fibres (28) for optical intelligence signals. Then the electrical power conductor and optical conductor are fed through separate glands ((40) and (32)) which facilitates manufacture and individual pressure testing prior to assembly in the regenerator.

Abstract: An improved composite overhead stranded conductor obtained by providing an optical fiber cable in an overhead power line formed by stranding a plurality of conductors, or in an overhead earth wire which is extended in parallel with such an overhead power line. A spacer having a plurality of axially extending helical grooves formed in an outer surface thereof is positioned within a protective tube. Respective optical fibers and/or optical bundles are received in each of the grooves. Each of the grooves has a width substantially equal to the outer diameter of the optical fiber and/or the optical bundles received therein so that movement of the optical fibers and/or the optical bundles in the grooves in the circumferential direction of the spacer is restricted.

Abstract: An underwater cable according to the invention comprises in particular of an optical core protected by a PVC sleeve 6, an armoring made of steel or aluminum wires 7, surrounded by a copper or aluminum sleeve 8. Longitudinal sealing of the armoring is ensured by an adhesive compound 10 based on epoxy resin and polybutadiene and butadiene copolymers.

Abstract: In a digital optical submersible repeater the electronic and opto-electronic components are housed in an hermetically sealed modular assembly (20, 60, 70) of a first regenerator module (20) for one fibre (7, 6a), a second regenerator module (60) for the second fibre (6, 7a) of the pair of fibres, and a power module (70) for extracting power from the power feed conductor of the cable. In each regenerator module (20) the transmit laser (8) and the receive PINFET diode are on diametrically opposed faces, and power feed and optical signal feed are disposed in spaces between the modules and the inside surface of the repeater housing (1). The modular assembly is resiliently secured to the bulkhead (2).

Abstract: The strength members of the optical fibre cables to be jointed comprise inner and outer layers of high-tensile wires (9, 10; 9', 10') arranged on respective pressure-resistant tubes (5; 5'), each containing an optical fibre package (not shown). The strength members are jointed by trapping the wires between a quill (15) and a ferrule (16) pressed towards the quill. The quill (15) is of a relatively hard steel and serves to partially reinstate the pressure tube between the ends of the cables, whereas the ferrule (16) is of a relatively soft steel. For jointing of two dielectric covered elements the ferrule is subsequently encapsulated in a dielectric moulding (27). A thin-walled reinstatement tube (17) is arranged between the quill (15) and one tube (5'). The cavity in the reinstatement tube (17) is larger in diameter than the cavity in the tubes (5 and 5').

Abstract: A flexible power cable includes three current carrying conductors and three further stranding elements arranged in the corner spaces twisted about a profiled core which contains a steel cable as the support member of the cable. The profiled core includes a round strand containing a steel cable and of three profiled strands radially adjacent thereto, each of which can contain a support member and/or an electric conductor.

Abstract: An optical fiber hermetic fixing structure of a feedthrough for an optical submarine repeater in which at least one optical fiber is introduced into a fluid-tight pressure-resistant housing of an optical marine repeater. Optical fibers are introduced and disposed in a through opening defined between a metal fiber-supporting guide and a metal sealing sleeve circumferentially of the fiber-supporting guide. The guide has a somewhat reduced diameter adjacent an end of the through opening so that the through opening has a greater transverse dimension along this part adjacent a seawater end of the feedthrough. This part of the through opening is filled with a low temperature melting metal about and between the optical fibers extending therethrough. The low melting temperature metal extends out of the through opening with a generally conical cross section configuration. A protective cover cap is disposed coaxial with the sleeve and fiber-supporting guide and through which the optical fibers extend longitudinally.

Abstract: A fibre optic lightweight submarine cable (2) is terminated to a tail cable (4) and anchored to a repeater housing (9) with preformed high-tensile steel anchor wires (1,3). The wires are clamped at one end (10) between a collar (7) and frusto-conical clamping segments (11) and strapped at the other end with binders (14). Over the tail cable portion is a spring (6) located on ferrules (6A, 7A) and acting to prevent the anchor wires crushing the tail cable (4).

Abstract: A fiber optic bulkhead penetrator for allowing fiber optic communication lines to penetrate through an undersea bulkhead employed in offshore oil well exploration and production apparatus having a very high pressure differential thereacross. The arrangement consists of a port and cofferdam installed in the undersea oil well exploration and production apparatus, and a bullnose penetrator, having a plurality of bulkheads therein, terminating an undersea fiber optic cable used for data transmission. The bullnose penetrator serves as a mating plug for a port provided in the oil well apparatus, with three sets of seals isolating the single-atmosphere environment from the ambient seawater pressure. A shoulder is provided on the penetrator and in the port to hold the penetrator in place once the cofferdam is evacuated and lowered to habitat pressure.

Abstract: An undersea communication cable system repeater housing and electronic circuits mounting structure includes a vessel having an electrical insulator covering an inside surface of the vessel. A heat conducting structure for mounting electronic circuits includes separable segments having surface areas contoured to match an inside surface of the electrical insulator. Electronic circuits are mounted on the heat conducting structure. The separable segments of the heat conducting structure are inserted into the vessel as a unit with resilient devices interposed between the segments for pressing the contoured surface areas into intimate contact with the inside surface of the electrical insulator.

Abstract: A sealed connection between an undersea coaxial line cable and a length of coaxial access cable connected to a repeater; the line cable comprising an axial conductor (11), insulation (12), a return path (13) and an outer sheath (14A); the access cable comprising an axial conductor (15), insulation, metal braiding (20A, B) forming a return path, and an outer sheath (14B); and the connection comprising a conical conductive metal connection part (16) for inter-connecting the axial conductors, a surface moulded layer of insulating thermoplastic material (17), a conductive connector (18) for interconnecting the return paths of the line cable and the access cable, and a reconstituted sheathing between the line cable and the access cable, wherein said conductive connector for inter-connecting the return paths comprises an aluminum flared tube fitted tightly over the surface-moulded insulation, with a layer of graft polyolefin or adhesive ionomer tape wound helically around the surface moulding being sandwiched in be

Abstract: A spliced portion housing structure for an optical fiber in an optical submerged repeater, characterized in that, in order to splice together in a joint ring an optical fiber and a power-supplying feeder from the optical submerged repeater to an optical fiber and a power-supplying feeder of a tail cable from a cable coupling of an optical submarine cable, respectively, a joint chamber is provided on an end plate of a housing of the optical submerged repeater in such a manner that the end plate forms a part of the joint chamber; the optical fiber and the power-supplying feeder from the submerged repeater are introduced into the joint chamber through a first feedthrough provided in the end plate for hermetically introducing the optical fiber and the power-supplying feeder; the tail cable from the cable coupling is hermetically introduced into the joint chamber through a second feedthrough provided in the wall of the joint chamber so that the tail cable is insulated from the joint chamber, the optical fibers and

Abstract: A device for connecting together the outer conductors of two coaxial pairs with coaxial conductors (3) and outer conductors (4), said device including two metal half-shells (11) with chamfered ends (10) which are provided with longitudinal slots, said half-shells being disposed between the ends of the outer conductors, a sleeve (6) which covers said half-shells and one of whose ends is provided with a tapping (7), and a clamping screw 8 which is screwed onto the end of the sleeve so that by means of a conical ring (9), it clamps one end of each half-shell. The inside of the other end of the sleeve is machined to give it a frusto-conical profile (19) whose conical shape matches that of the corresponding ends (20) of the half-shells. Application to connecting two lengths of coaxial cable or one coaxial cable to the coaxial lead of a repeater.

Abstract: A device for preventing damage to a submarine cable at the point where it leaves an equipment casing during passage round the cable drum and over the davit, and consisting of a chocking member (5) on each side of the casing (2) surrounding the cable (1) from its outlet from the casing to a point of contact of the cable with the drum (3), said chocking member being in the form of a body of revolution about the cable axis of generally pear-shaped configuration when unstressed and having a swollen part (6) at the casing end, said chocking member occupying all the space between the cable (1) and the drum (3) when the cable is wound on the drum, the swollen part of the chocking member when unstressed having a radius at least equal to the distance (d) between the cable and the drum at the outlet from the casing. The chocking member may be a sleeve of a strong and flexible material; it may also consist of a stack of elementary chocking members.

Abstract: A multiple connection for connecting a plurality of armored cables (1, 2) to the housing of electrical apparatus in an undersea system having a cable interconnection point where a plurality of cables serving different destinations are brought together, each of said cables comprising a core surrounded by armor and being terminated by a length of bared core extending beyond a severed end of the armor, and said housing having a hollow cable-fixing part through which the bared cable cores pass, characterized in that said connection comprises:a steel binding ring (12) through which the armored portion of each of said cables (1, 2), is threaded, said ring serving to bind said armored portions of cable together;a steel tube (13) threaded over said bared cores (7, 8) of said cables, having one end abutting against severed end portions of the armor (9, 10) of said cables and having its other end fixed mechanically to said hollow cable-fixing part (5) of the electrical apparatus housing;and auxiliary armor (14) wound a

Abstract: An optical fiber introducing equipment for an optical submerged repeater, in which for introducing an optical fiber for optical communication into an optical submerged repeater housing through an introducing hole, the coating of the portion of the optical fiber to be disposed in the introducing part is entirely removed for a suitable length; the coated optical fiber having the exposed fiber portion is inserted into a small-diametered metal cylinder having an insertion hole which has an inner diameter more than several times as large as the outer diameter of the coated optical fiber; an adhesive whose volume remains substantially unchanged even if hardened is filled between the optical fiber and the insertion hole to unite the optical fiber and the metal cylinder; seawater preventing means is provided on the outside of the adhesive for preventing the adhesive from making direct contact with seawater; and the metal cylinder is disposed in the introducing hole provided at a part of the repeater housing.

Abstract: An assembly for fixing an undersea telecommunications cable with a central strength member (1) but no metal armouring to the housing of a repeater (2). It includes a funnel-shaped conical part (3) with a flared mouth piece, a neck 3A whose inside diameter is equal to the diameter of the cable. Said conical part is fixed to the housing of the repeater. An elongate elastomer sleeve surrounds the end of the cable up to the inner zone of the neck of said conical part and has an outside diameter which tapers gradually towards its end distant from said mouth piece. An elongate shell (8) is made of stratified glass and resin material, said material surrounding the flared end of the mouth piece of the conical part and said sleeve. An outer sleeve (9) made of braid of high tensile strength extends around the periphery of said shell, and an elevator cover (10) surrounds the aforementioned parts. Application to cables which are to be submerged to great depths.

Abstract: A termination between a lightweight submarine coaxial cable (1) and a tail cable (2) connectible to a submersible repeater includes slip inducing means (8, 14) arranged on the joint (4) and a portion of the submarine cable (1) adjacent the joint such that armour wires arranged on a predetermined length of the submarine cable (1), including the portion, and on the joint (4) will slip during transfer of tensile load from the cable (1) to the repeater housing and not cause compression forces that can damage the joint (4). The length of the armour wires applied directly to the submarine cable sheath is chosen to be sufficient to transfer the tensile load on the cable safely to the repeater housing.

Abstract: An optical fiber feedthrough for an optical submerged repeater for use in an optical fiber submarine cable, in which a metal film is coated on the outer peripheral surface of an optical fiber to be introduced into the repeater, and in which a thermoplastic material, such as polyethylene or the like, is filled between the inner wall of a hole made in an end face plate of a pressure resisting container of the repeater and the metal film.

Abstract: Electronic equipment, e.g. a repeater and/or an equalizer is housed in an underwater housing (10). Each end of the housing is closed by a cover (11) and a sealed electrical connection must be provided between an underwater coaxial line cable (5) and the electronic equipment. The connection is provided by a lead-in length (1) of coaxial cable. This is initially connected to the electronics for final testing before it is sealed inside its housing. Thereafter the cover (11) and the sealing/fastening arrangements are threaded over the lead-in cable and the housing is sealed.

Abstract: A cable termination between a main coaxial cable and apparatus, such as a repeater housing. The outer conductor of the main cable is shielded by an effectively continuous tube of electrically conductive material extending from the end of the outer conductor of the main cable to the housing apparatus. A flexible bellows assembly can be used at the end of the tube connected to the repeater housing to accommodate relative movement between the cable and the repeater housing during installation.

Abstract: The invention relates to a sealed connection between an optical fibre line cable (C) and an electronics-containing submerged housing (11) the connection being via an access provided in a cover (1) which closes the housing. The connection is constituted by a length of optical fibre cable called the lead-in cable (2), installed on the electronics block and including thereon a notched hollow tube (7) which surrounds the cable together with connection ring (10) which extends the notched part towards the inside of the housing; one end of which is fixed to the notched part (7), the other forming a stop for the cover, the connecting ring co-operating with means (19) for locking the cover against the stop, said connection including outer casings (16, 23, 22) which provide continuity of the seal between the lead-in cable and the housing of the repeater.

Abstract: A construction for an electrical cable which carries an underwater transducer and is repeatedly reeled onto and from a hoist in a helicopter into the ocean to substantial depths. The cable includes a coaxial construction of copper conducting wires including a center conductor wound in a helix angle around a nylon center rod with the wires covered with a significant layer of polypropylene insulation and a tubular construction of fine copper wires wrapped around the polypropylene insulation in a helix angle and, in turn, wrapped with a copper-mylar tape with the copper layer adjacent the conducting wires. The tape is covered with a layer of polyvinylchloride insulation covered with an open-weave light Dacron braid bedding layer. The bedding layer serves to distribute forces from the armor layers which consist of a first layer of steel wires wound in a helix angle smaller than that of the conducting wires and in the opposite direction.

Abstract: A water-tight termination of a coaxial submarine cable to a tail cable including a piece-part polyethylene molding over a polyethylene/copper/polyethylene laminate and continuity braid. Applied heat externally bonds the laminate to a plastic internal core forming the dielectric and to the piece part to form a water barrier.

Abstract: Termination device for anchoring a fiber optic cable, especially in a fiber optic cable submarine signaling system wherein the cable must be periodically interrupted and anchored to the housing of a repeater, or the like. A central cable or strength member of steel, for example, is built into the cable along with a plurality of optical fibers. A compression block accepts the cable through an axial bore which flares out into a conical shape. A pressure cone has an axially slotted wall to form a plurality of tines which tend to compress radially inward against the strength member of the cable actually inserted therein when the cone is axially compressed into the conical cavity of the pressure block. Individual optical fiber passages through the compression block flare out from the small end of the conical cavity and pressure cone. The compression block fits into a cup of insulating material, the cable entering through a bore in the closed end of the cup.

Abstract: A fluid-type penetrator or feed-through device particularly adapted for conveying an optical fiber in a fiber optic signaling arrangement through an interface wall separating environments of greatly different physical (especially pressure) and/or chemical properties.A clearance passage considerably larger than the optic fiber is bored through the bulkhead separating the two different environments, and a guidance sleeve having a central axial bore only slightly clearing the diameter of the optic fiber is inserted therein. Pressure plugs also containing axial clearance bores are provided at high and low pressure sides of the arrangement, the low pressure plug being inserted by means of screw threads. The high pressure plug on a corresponding side of the bulkhead is automatically forced into tighter engagement in the counterbore into which it is inserted. Both pressure plugs include sapphire orifice members which have the characteristic of providing very small clearance for inserted optic fibers.

Abstract: A submarine telecommunications cable assembly includes a section of main submarine telecommunications cable electrically connected to a short length of cable extending from a repeater housing, the section of main cable being armoured at least in the proximity of the repeater. The electrical connection of the section of cable to the short length of cable extending from the repeater housing is positioned at a location spaced from the repeater housing and strengthening means are provided along the short length of cable substantially increasing the flexural rigidity of the short length of cable. The armouring of the main section of cable extends over the short length of cable and the strengthening means and is anchored to the repeater housing.

Abstract: A device for use in submarine cable systems, particularly for fiber optic cable systems. A water-tight enclosure or housing is provided which is accessible for maintenance purposes. The device, which is of generally tubular shape, provides termination chambers at either end attached to bulkhead members for the introduction of cables and their mechanical termination therein. The fiber optic elements themselves are passed through the bulkhead members in penetrator subassemblies to reach the interior chamber. An axially split cylindrical shell has at least two arcuate members which fit together and nest on circumferential shoulders on the bulkhead members which have radial depths equal to the material thickness of the arcuate members. An outer sleeve slides axially over this assembly, circumferential seals providing water-tight contact between the outer sleeve and the bulkhead members.