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| Number | Title | Issue Date |
| 5768341 | Communications channel testing arrangement A switching arrangement that can be connected in a communications channel that comprises a pair of lines between sets of terminal equipment, which comprises: (i) a series switch (1,2) for connection in each of the lines; (ii) a shunt switch for connection... | 06/16/1998 |
| 5446242 | Insulator A generally-planar polymeric protective shield (2) for mounting on a high voltage porcelain insulator (16) has circumferential and radial intersecting grooves (8,10) in its upper surface. The intersections are deepened to provide point projections (12) fr... | 08/29/1995 |
| 5442004 | Gels Gels of hard-elastomer-hard block copolymers with at least 300 parts of extending liquid per 100 parts of the copolymer contain at least 50 parts (per 100 parts of copolymer) of a stabilizing additive which resists migration of PVC plasticizers into the g... | 08/15/1995 |
| 5416663 | Arrangement for protecting telecommunications equipment from voltage transients An arrangement for protecting an electrical circuit such as a telephone circuit from a voltage transient comprises a voltage clamp or foldback device (3) arraigned to be connected between a current-carrying line (1) and ground (1'), a capacitor (2) in ser... | 05/16/1995 |
| 5403977 | Cable-sealing mastic material A close-fitting box (110, 120 FIG. 3) maintains a sheet (100) of mastic in sheet form for wrapping around a cable splice (FIG. 7) to supply large volume of mastic to fill the enclosure formed by applying a heat-shrinkable sleeve (250, FIG. 11) around the ... | 04/04/1995 |
| 5378402 | Polymer compositions Electrically conductive polymers, especially polypyrroles, are formed with a charged polymeric dopant supplying the necessary counter-ions to stabilise the charged conductive form of the conductive polymer. The physical properties of the conductive polyme... | 01/03/1995 |
| 5338821 | Aryl-ether-sulphone monomers and aryl-ether-keytone-sulfphone polymers Benzofuran-ether-sulphone monomers of formula ##STR1## and ether ketone polymers derived therefrom of formula ##STR2##... | 08/16/1994 |
| 5298301 | Electrical insulator A high voltage insulator has a polymeric core that forms a mechanical strength member and an outer covering of a heat-shrinkable polymeric tube that is electrically insulating and non-tracking and that has sheds on its outer surface.... | 03/29/1994 |
| 5296673 | Laser machining Apparatus for excimer laser image protection ablation of a target material comprising a projection lens system for projecting a mask pattern to be ablated onto the target, which lens system is telecentric towards the image (target) end of the projection p... | 03/22/1994 |
| 5296558 | Polymeric composition A polymeric composition comprises: (i) an aromatic polyimide or an aromatic carboxylic ester polymer, (ii) a substantially wholly aliphatic polyamide, and (iii) a polyamide that contains both aromatic aliphatic moieties. It is found that the mechanical properties of ble... | 03/22/1994 |
| 5174783 | Cable connecting module A cable connection module comprises a first part that receives a multi-conductor flat cable and that has two pairs of spring loaded insulation piercing teeth. The first part of the module has a channel through which the cable passes and into which the tee... | 12/29/1992 |
| 5145938 | Preparation of poly(arylene ether ketones) An arylene ether ketone copolymer comprising: (a) 99 to 10 mol % of repeat units ##STR1## and (b) 1 to 90 mol % of repeat units --Ar--O--Ar--CO-- (II), wherein each Ar independently is m- or p-phenylene or a di- or poly- m- and/or p-phenylene moiety in w... | 09/08/1992 |
| 4972042 | Blocking arrangement for suppressing fluid transmission in cables An arrangement for forming a block in a cable against transmission of fluid along the cable comprises a generally flat blocking array (1) that is formed from a fusible polymeric sealant, e.g. a hot-melt adhesive or a thermosetting adhesive, which has a nu... | 11/20/1990 |
| 4963819 | High voltage apparatus The invention provides a high voltage capacitor suitable for measuring the voltage of an overhead power line. The capacitor dielectric is mounted directly on to the power line conductor, which serves as one electrode of the capacitor. The other electrode ... | 10/16/1990 |
| 4935270 | Heat recoverable article with heat curable adhesive coating A dimensionally heat-recoverable article has on one of its surfaces a heat-curable adhesive coating. The coating has a mixture of substantially solid particles of a first reactive component with separate substantially solid particles of at least a second ... | 06/19/1990 |
| 4898983 | Preparation of aryl carbonyl compounds Friedel Crafts preparation of aryl carbonyl compounds having an exceptionally high degree of isomeric purity and freedom from by-products can be achieved by adding to the Lewis acid reaction system a protic controlling agent selected from ROX, water, RCOO... | 02/06/1990 |
| 4865559 | High voltage connector A high voltage connector is provided for interconnecting a power cable to an apparatus such as a transformer. The cable is securely coupled to the connector, which is then mounted on to the transformer bushing. The bushing and cable electrical contacts in... | 09/12/1989 |
| 4845318 | Composite electrical insulator and method of forming same The invention provides an electrical insulator comprising a cylindrical core (2) of an insulating refractory material, such as porcelain, onto a portion of the curved surface of which a sleeve (8) of insulating polymeric material is fitted. Metal end-caps... | 07/04/1989 |
| 4845179 | Preparation of organic polymers using organometallic capped monomers to produce metal free polymers A method for the preparation of a variety of engineering polymers and copolymers, in particular aromatic polymers and copolymers which comprises reacting a stannylated reactant containing a first monomeric or polymeric moiety with an electrophilic reactan... | 07/04/1989 |
| 4844959 | Heat curable adhesive coating Cohesive flexible curable adhesive coatings formed from a dispersion of first and second powdered curing components, preferably reactive at ambient temperatures, in a solution of a binder, the binder content being not more than 15%, preferably not more th... | 07/04/1989 |
| 4841013 | Preparation of poly(arylene ether ketones) Friedel Crafts preparation of arylene ether ketone polymers with an exceptionally high degree of isomeric purity and freedom from by-products can be achieved by adding to the Lewis acid reaction system a protic controlling agent selected from ROX, water, ... | 06/20/1989 |
| 4841094 | Preparation of monomers Organic compounds having functional groups such as aromatic ester, thioester, or carbonate groups are prepared by reacting an organometallic reactant where the metal is gallium, indium, thallium arsenic, antimony, or bismuth, with a suitable second reacta... | 06/20/1989 |
| 4841011 | Preparation of arylene oligomers Friedel Crafts preparation of arylene ether (especially arylene ether ketone) oligomers with an exceptionally high degree of isomeric purity and freedom from by-products can be achieved by adding to the Lewis acid reaction system a protic controlling agen... | 06/20/1989 |
| 4827081 | Helical insulator containing at least one optical fiber A high voltage insulator that has a helical configuration in which successive turns are axially spaced apart, and an exposed surface of insulating and substantially non-tracking material. The helical configuration provides a long creepage path length and ... | 05/02/1989 |
| 4820792 | Preparation of aromatic polyketones using a strong acid catalyst with a weaker acid solvent Polyaryletherketones are synthesized by Friedel-Crafts chemistry using a catalytic quantity of a strong acid (e.g. trifluoromethanesulphonic acid) in a solvent of lower acidity preferably comprising a second acid of strength at least equal to chloroacetic... | 04/11/1989 |
| 4816614 | High frequency attenuation cable High frequency attenuation cable has a core surrounded by an EMI shielding layer. The core comprises at least one inner conductor, at least one high frequency absorption layer or non-amorphous magnetic metal tape surrounding, but not necessarily adjacent ... | 03/28/1989 |
| 4798752 | Curable sheet A curable sheet comprising first and second curing reactants arranged in discrete areas of the sheet, preferably by coextrusion, in patterns such as stripes and checks. The sheet cures upon fusion of the respective areas of the curing reactants.... | 01/17/1989 |
| 4791245 | Terminated electric cable The termination of a high voltage electric cable includes a rigid heat shrinkable tube that extends between the cable jacket and a connector mounted on the cable conductor. The tube is made from an engineering plastic material and has a Flexural Modulus a... | 12/13/1988 |
| 4788089 | Heat-recoverable article Self-supporting helical heat-recoverable material provides easily installed insulating covering for wires and cables. The helical arrangement may be made by differential recovery of a two-layered tape of the heat-recoverable material around a cooled mandr... | 11/29/1988 |
| 4777282 | Preparation of monomers Organic compounds having functional groups such as aromatic ester, thioester, or carbonate groups are prepared by reacting an organo- germanium, tin, or lead reactant with a suitable second reactant. For example, the ester ##STR1## is prepared b... | 10/11/1988 |
| 4767668 | Electric wire and cable Electrical wire and cable is provided with a layer of insulation or jacketing material which comprises a mixture of: (1) a polyester based on tetramethylene terephthalate, preferably polytetramethylene terephthalate; and (2) more than 40%, based on polyme... | 08/30/1988 |
| 4764422 | Electrically conductive composite material Electrically conductive composite material comprises: (a) an open-celled cellular structure of polymeric material, preferably an open-celled foam, having electrically conductive material on at least its interior surface defining the cells, e.g. deposited metal... | 08/16/1988 |
| 4761193 | Recoverable article for encapsulation A recoverable article comprises a recoverable fabric, means for rendering the fabric impervious, and a shaped liner. The assembly can be used to form a pressure resistant splice case for telecommunications cables.... | 08/02/1988 |
| 4761194 | Method of environmental sealing A method of environmentally sealing a pipe, cable or harness substrate by means of a recoverable fabric and a sheet of polymeric material.... | 08/02/1988 |
| 4707388 | Heat-recoverable article A dimensionally recoverable article, preferably a heat-recoverable article, has on at least part of a surface thereof an adhesive composition that will cure by reaction of a plurality of mutually reactive components. The components are in the form of part... | 11/17/1987 |
| 4675258 | Protected electrode article A protected electrode article comprising sensitive electrode material having a layer of protective material bonded to at least part of its surface by means of an adhesive which can be made to swell by treatment with liquid, so as to increase the permeabil... | 06/23/1987 |
| 4659871 | Cable with flame retarded cladding Polymeric cladding for elongate substrates, preferably electrical conductors, comprises an inner layer and an outer layer, the outer layer being a cross-linked polymer composition filled with halogen-free particulate inorganic flame-retardant filler which... | 04/21/1987 |
| 4639545 | Recoverable article for screening A recoverable fabric for example a weave having a conductive metal warp and a recoverable polymeric weft may be provided with solder to provide an article for screening electrical components.... | 01/27/1987 |
| 4631098 | Heat-recoverable article A heat recoverable article comprises a recoverable fabric and a polymeric layer of at least 0.03 mm thickness, and preferably unstressed. Such an article can be recovered by means of a torch to provide an environmental seal around substrates such as cable... | 12/23/1986 |
| 4626458 | Recoverable article for encapsulation A recoverable article comprises a recoverable fabric, means for rendering the fabric impervious, and a shaped liner. The assembly can be used to form a pressure resistant splice case for telecommunications cables.... | 12/02/1986 |
