Abstract: A cable gland assembly for an electric cable having a sheath enclosing at least one conductor core is described, the assembly comprising a body and a barrier sleeve (4) locatable in the body wherein, in use, the at least one core extends through the body and the sleeve (4) and a hardenable compound is disposed in the sleeve (4) filling the sleeve and surrounding the at least one core, wherein the sleeve (4) comprises a resilient or elastic material.

Abstract: A cable gland assembly for sealing between a cable and a wall through which the cable passes is described, the assembly having a sealing mechanism includes comprising a sealing sleeve and a sealing sleeve urging device which on relative movement of two assembly parts as forced to urge the sealing sleeve in a sealing direction, the sealing sleeve urging device having a plurality of fingers mounted in a cylindrical formation on a support ring and wherein each finger is pivotable generally about the location at which the finger is mounted on the ring and each finger is relatively stiff thereby to remain substantilly straight when forced to pivot, the assembly being characterised in that te sealing sleeve has a flange at one end of said sleeve.

Abstract: A digital instrumentation system has a power supply means 36 which supplies power to at least one instrument 3 located in a hazardous area 5. Also located in the hazardous area 5 is power limiting means 27 for limiting the power supplied to each instrument 3.

Abstract: A removable cap is provided to cover temporarily the end of a cable during assembly of a cable gland to protect an elastomeric seal from contact with sharp conductor cores.

Abstract: The female part of an underwater electrical connector has inner and outer chambers containing non-conductive fluid. Each chamber has an opening sealed by a respective spring loaded ball in the unmated condition of the connector and by a contact pin of the male part in the mated condition of the connector. The balls are displaced transversely to the direction of movement of the contact pin to engage the contact socket and automatically re-seal the openings when the contact pin is withdrawn.

Abstract: An electric cable termination gland has a continuity member formed by a metal sleeve which is located within the gland and has a middle region of reduced strength formed by a series of discrete bridge portions with a partially folded crease creating a central zone about which the bridge portions can fold inwardly when axial pressure is applied to the continuity member to cause the bridge portions to contact an exposed metal sheath of a cable extending through the gland.

Abstract: An insulation piercing earthing ring for a gland termination to provide earth continuity between an electrically conductive gland body and an electrically conductive inner sleeve of an insulated cable or pipe has a flat annular washer for locating against the end of the cable or pipe with at least one contact finger extending from the periphery of the washer to surround the cable or pipe and terminating in an inwardly directed projection for piercing the insulation. The contact finger extends axially and radially outwards from the periphery of the washer in the undeformed free state and is deformed radially inwards by engagement with a tapered entry portion of the gland body causing the projection to pierce the insulation and contact the electrically conductive inner sleeve.

Abstract: A hollow first gland part has a counterbore at one end to receive an end portion of a hollow second gland part that is axially located relative to the first gland part. A seal assembly is connected to the end portion of the second gland part for sealing engagement with a cable extending through the first and second gland parts. The seal assembly includes a diaphragm extending inwardly from an outer sleeve mounted on the end portion of the second gland part and an annular backplate for supporting the diaphragm. The diaphragm and backplate are both convergent away from the end portion of the second gland part so as to maintain sealing engagement of the diaphragm when a higher pressure exists on the side of the diaphragm remote from the end portion of the second gland part.

Abstract: A non-conductive plastics junction box for connecting at least two cables has an internal conductive continuity plate integral with a base of the box. The plate has a base panel with at least one lug arranged to extend outwardly and externally of the base to provide an earthing terminal to ground, and side panels arranged to overlie side walls of the base in which entry ports are formed to receive cable glands for the respective cables. The continuity plate is in electrical contact with the glands and provides a continuous earthing path from the cables to the earthing terminal(s).

Abstract: An electric cable barrier gland in which hardenable filler compound for surrounding the conductor core of a cable extending through the gland is disposed within a barrier sleeve located in a gland body with any clearance gap therebetween closed by a seal member mounted on a cylindrical sleeve portion of the barrier sleeve between opposed abutment shoulders of the barrier sleeve and gland body.

Abstract: The invention concerns a lead-through transit for cables 3 or pipes of the kind having a frame 1 of the opening 2 is filled by a series of modular resilient lead-through blocks 4 and blank blocks 5 arranged in rows separated by stayplates 6 with a compression and packer assembly 7 clamping and holding the blocks 4,5 and cables 3 in sealed engagement. The lead-through blocks 4 comprise two complementary half-blocks 40 that provide, when assembled together around a cable, a passageway 41 for the cable. Each half-block 40 has a series of axially spaced semi-annular lands 42 separated by recesses 43. The lands 42 provide axially spaced sealing faces for engagement with the cable while the recesses 43 enable resilient deformation of the block to accommodate variations in cable size. To assist in such resilient conformation of the half-blocks 40, it is preferred that the half-block has recesses 44 formed on the outer faces that are aligned with the lands 42.

Abstract: In a lead-through transit for cables or pipes 3 of the kind in which a series of modular resilient blocks 4 or blanks 5 are mounted in a frame 1 through which the cables 3 extend, the invention is directed to the compression and packer assembly 7 by which the opening through the frame 1 is closed and pressure applied to the assembled cables 3, blocks 4 and blanks 5 with stayplates 6 between each row of blocks. The compression and packer assembly 7 comprises a rigid plate 8 which seats on the assembled blocks 4 and blanks 5 for engagement by a compression bolt 33 mounted on the frame 1 to apply a load to the plate 8.

Abstract: A releasable tube coupling comprises a body providing a housing in which an annular seal and clamping ring are located and secured by a retainer and, a releaser slidably supported by the retainer for limited axial movement relative to the housing. The seal is of generally Z-section having outer and inner flanges connected by an inclined web convergent towards the inside of the housing. The clamping ring is mounted into the seal and has a plurality of spaced apart radially inwardly directed inclined teeth which overlie the web on the inner face of the seal for engagement with the outer surface of a tube received within the housing to retain the tube in the housing. The teeth are displaced away from the tube to permit axial withdrawal the tube on inwards movement of the releaser which acts on the teeth through the seal web.