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1. 发明专利

GB584153A Improvements in or relating to electric communication cables 未知
公开(公告)号：GB584153A
公开(公告)日：1947-01-08
申请号：GB2034344
申请日：1944-10-20
申请人： STANDARD TELEPHONES CABLES LTD , THOMAS ROBERTSON SCOTT
IPC分类号： H01B7/12 , H01B11/18 , H01P3/02
摘要： 584,153. Electric cables. STANDARD TELEPHONES & CABLES, Ltd., and SCOTT, T. R. Oct. 20, 1944, No. 20343. [Class 36] An inner conductor is separated from an outer conductor or sheath by air-spaced bodies of expanded organic insulating material. In Fig. 1, the inner conductor 1 and outer conductor 2 are separated by beads 3, of expanded polystyrene, polythene, polymerized 2.5 dichlorostyrene, or polytetrafluorethylene made in two portions and cemented together by polystyrene dissolved in monomeric styrene. The remaining space may be filled by gas, such as nitrogen or helium, at super-atmospheric pressure. In Fig. 3, the beads are replaced by three layers of tape, which may be trapezoidal in cross-section, made of expanded material and laid helically about the inner conductor 1, the spaces 7 being filled with gas. Alternatively the conductors may be separated by cords of the expanded material. Initially, the gas pressure is raised to the required amount, so that gas enters the honeycomb structure by diffusion through the thin partitions, and longitudinal channels may be provided in the insulation immediately adjacent to the conductors to facilitate permeation of the gas. When the invention is applied to a cable with an inner conductor and an outer sheath of lead or polyisobutylene loaded with carbon black, rubber or synthetic rubber, a layer of unexpanded material such as a polymer of ethylene or polytetrafluorethylene, a copolymer of styrene with butadiene or rubber, a copolymer of dichlorostyrene with butadiene or rubber, chloroprene, or butyl rubber is applied to the conductor by extrusion. Specifications 448,486 and 553,569 are referred to.

2. 发明专利

GB553027A Improvements in or relating to joints for electric power cables 未知
公开(公告)号：GB553027A
公开(公告)日：1943-05-05
申请号：GB1401741
申请日：1941-10-31
申请人： STANDARD TELEPHONES CABLES LTD , THOMAS ROBERTSON SCOTT
IPC分类号： H02G15/196
摘要： 553,027. Cable joints. STANDARD TELEPHONES & CABLES, Ltd., and SCOTT, T. R. Oct. 31, 1941, No. 14017. [Class 38 (i)] A joint between a cable having insulation of paper and one having rubber insulation is covered by wrapping or taping the joint with acetylated cotton, acetylated paper, or other fibrous material impregnated with a mixture of rubber and polystyrene that bonds with both types of cable insulation. After baring and jointing the cores, the exposed insulation of both cables is basted with a mixture of polystyrene and monostyrene and the impregnated tape lapped on, each layer being basted. If both cables have lead sheaths the joint is sealed in a metallic sleeve, any space between the wrapped tape and the sleeve being filled with compound containing polystyrene. If only one cable has a lead sheath lead foil may be applied outside the tape to extend and terminate the sheath. Specifications 504,720 and 532,687 are referred to.

3. 发明专利

GB506277A Improvements in or relating to electrical stress grading devices 未知
公开(公告)号：GB506277A
公开(公告)日：1939-05-24
申请号：GB3238737
申请日：1937-11-24
申请人： STANDARD TELEPHONES CABLES LTD , THOMAS ROBERTSON SCOTT , JOHN KRAUSS WEBB
IPC分类号： H01B9/02 , H02G15/06
摘要： 506,277. Condensers; insulators and cable-end sleeves. STANDARD TELEPHONES & CABLES, Ltd., SCOTT, T. R., and WEBB, J. K. Nov. 24, 1937, No. 32387. Drawings to Specification. [Classes 36 and 37] A stress grading means capable of use in cable-ends, condenser -bushings, potential dividers, or hign tension condensers is prepared by winding sheets or tapes of fibrous insulating material, impregnated or surface impregnated with polymerized material such as polystyrene, into the desired form, inserting conducting layers between the convolutions during the winding and rendering the surface polymer of the fibrous material tacky and adhesive by applying polymerizable material therto so as to convert the assembly into a solid unit. The polymerizable material such as monomeric styrene may be applied to the surfaces in the course of winding or may be subsequently introduced as by immersion or impregnation. The conductive layers may be applied by spraying metal. Specifications 449,868; and 454,923, [Group VIII] are referred to and the Provisional Specification refers to Specifications 377,311, 464,801, 465,883, and 504,720.

4. 发明专利

GB395737A Improvements in or appertaining to the manufacture or treatment of paper for use in electrical insulation 未知
公开(公告)号：GB395737A
公开(公告)日：1933-07-24
申请号：GB2944331
申请日：1931-10-23
申请人： STANDARD TELEPHONES CABLES LTD , THOMAS ROBERTSON SCOTT , MALCOLM CLIFFORD FIELD
IPC分类号： H01B3/48
摘要： 395,737. Condensers. STANDARD TELEPHONES & CABLES, Ltd., SCOTT, T. R., and FIELD, M. C., Connaught House, Aldwych, London. Oct. 23, 1931, No. 29443. [Class 38 (ii).] Paper for condensers &c. is obtained by treating the dry fibre or paper by a controlled process of partial acetylation such that the product is substantially free from tri-acetate; paper so treated retains its mechanical strength and is less absorbent to moisture, but may be impregnated. According to the Provisional Specification, paper or dried pulp is partially esterified or etherified. Specification 372,312 is referred to.

5. 发明专利

GB377311A Improvements in or appertaining to the terminations or joints for high tension electric cables 未知
公开(公告)号：GB377311A
公开(公告)日：1932-07-28
申请号：GB1249031
申请日：1931-04-28
申请人： STANDARD TELEPHONES CABLES LTD , THOMAS ROBERTSON SCOTT , JOHN KRAUSS WEBB
IPC分类号： H02G15/107
摘要： 377,311. Cable joints and end constructions. STANDARD TELEPHONES & CABLES, Ltd., SCOTT, T. R., and WEBB, J. K., Connaught House, Aldwych, London. April 28, 1931, No. 12490. [Classes 36 and 38 (i).] The electrostatic stress at a cable termination, Fig. 10, or joint, Fig. 9, is controlled by means of a divergent cone 2 of wrapped insulation with a series of embedded metallized layers V, the layer of smallest diameter being connected to the sheath 4 and the largest to the core 1. The cone may be formed by wrapping on a former sheet insulation, such as paper, and inserting at intervals a single layer of metal foil, the sheet being cut obliquely at several points during winding so as to divide it into a number of cones. Alternatively a strip, metallized at intervals and suitably shaped may be wound on a short brass tube 3. The outer metallic layer is connected to the core by a metal plate 12, the enclosed space being filled with esterified cellulose, polymerized styrene, or other powdered or granular insulating material mixed with oil, or or with oil, jelly, or wax. A tube 10 may cover the cable insulation.

6. 发明专利

GB339990A Improvements in or relating to electric cables 未知
公开(公告)号：GB339990A
公开(公告)日：1930-12-18
申请号：GB2828629
申请日：1929-09-18
申请人： STANDARD TELEPHONES CABLES LTD , THOMAS ROBERTSON SCOTT , THOMAS NIXON RILEY
IPC分类号： H01B3/48
摘要： 339,990. Standard Telephones & Cables, Ltd., Scott, T. R., and Riley, T. N. Sept. 18, 1929. Drawings to Specification. Condensers.-A process for the impregnation of insulating materials such as fibrous insulation with a hydrocarbon oil in the manufacture of high tension cables or electric condensers consists in drying and exhausting the insulation and, before impregnation, replacing the residual air by the vapour of a substance which vapourizes under the temperature and low pressure conditions in the impregnating vessel and which is condensed to a liquid or a solid under the tern. perat,ure and pressure conditions of service. The impregnating vessel may be the lead sheath of a cable, and, preferably, the substance is such as. to condense during impregnation. In one method, a substance is introduced which wholly maintains the normal absolute pressure of the impregnating vessel by vapour pressure, the pressure remaining constant while the limit of vacuum is being reached by the pumping, and the action is stated to be a gradual replacement of residual air in the insulation by vapour. A condenser trap is fitted to the impregnating vessel to pass air and moisture but retain condensible vapour in the vessel. The impregnating medium is admitted to the vessel and the vapour is condensed by a gradual temperature decrease or by forcing in the impregnating medium at a pressure greater than the vapour pressure of the condensible substance at the temperature of impregnation. The insulation is impregnated at a temperature of 130‹-140‹ C. and an absolute pressure of 55 mm. of mercury or less. The pressure head of the incoming impregnating compound may be sufficient to condense the vapour without temperature change, the Specification stating that when a cable is impregnated at 5 mm. pressure and 108‹ C. with diphenyl as the vapourized substance, an oil head of three inches at the surface of the incoming compound is sufficient to condense the vapour. A mixture of vapourizable materials may be used such that the sum of the partial pressures at any temperature gives the desired pressure. The substance may be vapourized in a separate system and introduced as a vapour to the impregnating vessel or may be introduced as a solid or liquid and evaporated. The substance may be sprayed in at reduced temperature as a liquid into the fibrous insulation so that evaporation may occur in the interior of the insulation when the temperature is raised. The substance may be incorporated in a cable during manufacture and evaporated during or after the final drying operations. The substance may be applied to the cable core, and is preferably such as will not evaporate during the initial stages of drying. An example given consists of a copper core which after stranding, is. passed through a bath of a substance which does not evaporate below 100‹ C. at atmospheric pressure. The core is then insulated. The whole fibrous insulation may be impregnated with the vapourizable substance before, or after, application to the cable, and varnished with a retaining medium which may be of a resinous nature. In an example, methyl naphthalene is used as a vapourizable substance, the temperature being raised towards the end of the drying by passing an electric current through the core. Materials which may be impregnated are stated to be paper, textile materials, hydrocarbon oil with or without resins, tars, bitumens, resins and synthetic resins in solvents, cellulose acetate in solvents, sulphur, waxes such as paraffin, ceresin and beeswax, halogenated waxes such as chlorinated naphthalene, and petroleum jellies. Methyl naphthalene and diphenyl, when used as the vapourizable substance, are stated to reduce the dielectric losses of the oil in the finished cable. Diphenyl, methyl naphthalene, and aromatic hydrocarbons may be used as vapourizable materials in order to increase the resistance of the impregnating compound to deterioration. A vapourizable substance may be used which, on condensation, improves the absorption properties of the fibrous material, e.g. by wetting the surface of the fibres, or a substance may be used which forms a protective film on the fibres provided that the film is chemically inactive under electric discharge in the cable. For condensers, a vapourizable material of high specific inductive capacity such as glycol or ethylene glycol may be used. These substances are stated to raise the specific inductive capacity of the impregnating material. The vapourizale material may be an introfier for the impregnating material. It is stated that, for introfying sulphur into fibre boards or asbestos at 135‹ C., naphthalene, diphenyl, and triphenyl are vapourizable substances to be used.

7. 发明专利

GB630147A Improvements in or relating to cable sheaths and their manufacture 未知
公开(公告)号：GB630147A
公开(公告)日：1949-10-06
申请号：GB3784346
申请日：1946-12-24
申请人： STANDARD TELEPHONES CABLES LTD , THOMAS ROBERTSON SCOTT , WILLIAM KIRBY WESTON
IPC分类号： H01B7/22 , H01B7/282
摘要： 630,147. Making cable sheaths. STANDARD TELEPHONES & CABLES, Ltd., SCOTT, T. R., and WESTON, W. K. Dec. 24, 1946, No. 37843. [Classes 83 (ii) and 83 (iv)] [Also in Group XXXVI] A method of manufacturing a cable sheath having three or more layers comprises the steps of applying an intermediate layer or layers in discontinuous form and integrating by heat into a continuous moisture-proof barrier. The sheath may be of circular, oval, rectangular or polygonal section. The intermediate layer may be of a metal having a relatively low melting point such as silver, tin, zinc, lead, tinned lead, or alloys of these metals with or without other alloying ingredients. Such a layer may form a coating on one face or both faces and in some cases the edges of a carrier layer such as iron, steel, aluminium or copper, or a non-metallic backing. The inner and outer layers may be both of metal such as iron, steel, aluminium, aluminium alloys, or copper, or of non-metallic material such as paper, or one layer may be metal and the other non-metallic. In one embodiment a metal intermediate layer has incorporated with it a layer of soft material such as paper or plastic on one or both sides of it. Tubes may be made from tapes spirally wound with butt or overlapping joints or with longitudinal butt or overlapping joints by feeding the tape axially into a cylindrical die. Or one or more layers could be extruded with the intermediate layer formed from tape. According to one method, tapes 14 and 15 coated with a low melting point metal are wound with opposite lays on a mandrel 16, the tube after winding being passed through a highfrequency heating coil 22 to fuse together the metallic coatings. Either the mandrel 16 may rotate or the reels 17, 18 carrying the tapes 14, 15, may rotate bodily about the mandrel. A modification, Fig. 10 (not shown), indicates the method of forming corrugated tubes, which are stated to have a particular application to the sheathing of oil-filled cables. The intermediate layer may be heated.by electrical or other means, the electrical means including induction or dielectric heating of high or low frequency.

8. 发明专利

GB546990A Improvements in or relating to electric insulating materials 未知
公开(公告)号：GB546990A
公开(公告)日：1942-08-07
申请号：GB1360941
申请日：1941-01-02
申请人： STANDARD TELEPHONES CABLES LTD , THOMAS ROBERTSON SCOTT , ARCHIBALD ALAN NEW
IPC分类号： H01B3/44
摘要： 546,990. Polyvinyl compositions. STANDARD TELEPHONES & CABLES, Ltd., SCOTT, T. R., and NEW, A. A. Jan. 2, 1941, Nos. 13609 [Divided out of 546,971] and 13610. [Class 2 (iii)] A process of preparing an electric insulating material from two different insulating materials, one of which is solid and consists of or comprises polystyrene and the other of which is liquid and consists of or comprises a plasticizer for polystyrene, comprises the steps of placing the solid material in a fragmentary state in a container not surrounding electrical apparatus and drawing the liquid into the container under vacuum at least to fill the interstices between the fragments of solid ; after restoring the pressure to atmospheric, the material may be allowed to stand, again evacuated, heated with or without stirring and the pressure then restored to atmospheric. The proportion of solid to liquid may be increased by using particles of solid of mixed grain size, by shaking the container and by compressing the particles ; the proportion of liquid to solid may be increased by preparing a solid material as set out above, comminuting the material, and repeating the process with the comminuted material and additional plasticizer. The polystyrene may be employed in admixture with rubber and the plasticizer may be poly α-methylstyrene, monostyrene, 1,1-di-p-tolylethane or a solution of polystyrene in monostyrene or 1,1-di-p-tolylethane. Specifications 504,765, 504,780, 532,687, [Group XXXVI], and 542,694, [Group XXVIII], are referred to. In Provisional Specification 546,990, [Group XXVIII], reference is made to Specification 540,300, [Group XXXVI]. According to Provisional Specification 546,990, any solid and any liquid insulating materials may be used.

9. 发明专利

GB532721A Improvements in or relating to cable joints and terminations 未知
公开(公告)号：GB532721A
公开(公告)日：1941-01-29
申请号：GB2327839
申请日：1939-08-11
申请人： STANDARD TELEPHONES CABLES LTD , THOMAS ROBERTSON SCOTT , JOHN FREDERICK MORLEY
IPC分类号： H02G15/06
摘要： 532,721. Cable joints. STANDARD TELEPHONES & CABLES, Ltd., SCOTT, T. R., and MORLEY. J. F. Aug. 11, 1939, No. 23278. [Class 38 (i)] A cable joint or termination is covered with two sections of wrapped insulation. the inner being of fibrous material impregnated with polystyrene and basted with monomeric styrene as described in Specifications 504,720 and 532,687, and overlapping the cable sheath as described in Specification 508,036, and the outer section being of tape made from a material impervious to water such as plasticized polystyrene, neoprene, artificial rubber, or mixtures containing such materials. As shown, the joint between a cable 1 and a terminal 5 is wrapped with impregnated fibrous material 7 coated with a layer of polystyrene dissolved in monostyrene and tightly fitted in a metal tube 4. The outer impervious section 9 covers the end of the tube 4 and the exposed parts of the wrapping 7 and the terminal shank, abutting against a collar 6. An outer layer of fabric tape may be applied and vulcanized. Specification 429,611 also is referred to.

10. 发明专利

GB532688A Improvements in or relating to electric cables 未知
公开(公告)号：GB532688A
公开(公告)日：1941-01-29
申请号：GB2160839
申请日：1939-07-25
申请人： STANDARD TELEPHONES CABLES LTD , THOMAS ROBERTSON SCOTT , JOHN KRAUSS WEBB
IPC分类号： H02G15/00
摘要： 532,688. Cable joints and terminations. STANDARD TELEPHONES & CABLES, Ltd., SCOTT, T. R., and WEBB, J. K. July 25, 1939, No. 21608. Addition to 504,720. [Classes 36 and 38 (i)] A barrier joint or termination for an impregnated power cable is formed by lapping the conductor with paper or other fibrous tapes impregnated with polymerized insulating material, the tapes being basted with a non- polymerizable material which is soluble in the polymerized material and thus causes the tapes to adhere to one another. The solvent must be one which is completely soluble in all proportions in the polymerized material, and vice versa, and must be limited to such an amount that the polymerized material is not softened to a degree permitting plastic flow under normal operating temperature and pressure conditions of the cable. When employing tapes impregnated with a mixture of polystyrene and plasticizers the combined amount of plasticizers and the solvent used for basting, which may be toluene or methyl chloride, should not exceed 25 per cent. of the impregnant. Toluene may also be used as the solvent when polyisobutylene is employed as the impregnant. The lappings of tape may overlap the sheath of the cable, as described in Specification 508,036. Bushings, condenser or otherwise, and stress grading devices may be formed in a similar manner.

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