Liquid Filled Patents (Class 174/17LF)
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Patent number: 4420791Abstract: A dielectric fluid provides a mixture of a diarylethane compound and 10% to 80% by volume of an epoxide additive.Type: GrantFiled: December 28, 1981Date of Patent: December 13, 1983Assignee: Emhart Industries, Inc.Inventor: Vandos Shedigian
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Patent number: 4410869Abstract: Compositions containing ditolyl ethers have outstanding dielectric properties. They are particularly suitable for use as impregnating agents in condensers.Type: GrantFiled: March 25, 1982Date of Patent: October 18, 1983Assignee: Bayer AktiengesellschaftInventors: Alfons Klein, Karlfried Wedemeyer, Lothar Havenith, Rolf Kron
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Patent number: 4407697Abstract: The invention relates to a method for improving the thermal stability and dielectric integrity of a cellulosic web product. The cellulosic web is impregnated with a nitrogen donor compound such that the web contains not less than 0.2% by weight of the compound and thereafter impregnated with an aqueous vegetable protein solution at a pH of not less than about 8.5.Type: GrantFiled: April 5, 1982Date of Patent: October 4, 1983Assignee: McGraw-Edison CompanyInventors: Fred S. Sadler, Paul F. Hettwer, Vu H. Viet, Clarance R. Acker
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Patent number: 4401871Abstract: A liquid halogenated hydrogenated hydrocarbon composition suitable for use as a dielectric and/or arc-extinguishing fluid in electrical apparatus, which comprises(a) a major proportion by weight of one or more halogenated paraffinic hydrocarbons having at least 8 carbon atoms and containing from 40% to 70% by weight of halogn based on the halogenated paraffinic hydrocarbon, and(b) a minor proportion by weight of at least one non-flammable viscosity-reducing additive for the halogenated paraffinic hydrocarbon (a) which contains at least 50% by weight of halogen based on the additive and is a halogenated aliphatic hydrocarbon containing from 2 to 6 carbon atoms.Suitable electrical apparatus may comprise a circuit interruption device such as a switchgear.Type: GrantFiled: January 15, 1982Date of Patent: August 30, 1983Assignee: Imperial Chemical Industries PLCInventors: Harold Lloyd, John Coxon
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Patent number: 4347169Abstract: An electrical insulating oil and oil-filled electrical appliances, in which the insulating oil comprises a mixture of diarylalkanes and alkyl-3-arylindane derivatives and/or 1,3-diarylbutene derivatives, and has various advantageous properties such as a high dielectric constant, hydrogen gas absorbing capacity, and adaptability to plastic film materials. By impregnating with the above insulating oil, high performance and long life electrical appliances can be manufactured.Type: GrantFiled: June 23, 1981Date of Patent: August 31, 1982Assignee: Nippon Petrochemicals Company, LimitedInventors: Atsushi Sato, Naoya Takahashi, Keiji Endo, Hitoshi Yanagishita
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Patent number: 4343029Abstract: Capacitors and similar electrical devices containing a dielectric liquid have superior properties when the dielectric liquid is a polyalkylated diphenyl sulfide. Particularly good dielectric properties are provided when the liquid consists essentially of the mixed isomers obtained by reacting m-xylene or similar dialkylbenzene with SCl.sub.2.Type: GrantFiled: September 16, 1980Date of Patent: August 3, 1982Assignee: The Dow Chemical CompanyInventors: James M. Renga, Albert H. Emmons
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Patent number: 4321424Abstract: An oil capable of use in environments where the accumulation of water is detrimental to the intended use, the oil consisting of branched and straight chain aliphatic hydrocarbons and minor amounts of tri-cresyl phosphate.Type: GrantFiled: March 31, 1978Date of Patent: March 23, 1982Assignee: RTE CorporationInventor: John H. Olmsted
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Patent number: 4293433Abstract: Electrical devices such as transformers and power capacitors are improved by the use of a dielectric fluid prepared by combining perchloroethylene having a low chlorinated ethane content with an antioxidant. This fluid has excellent resistance to decomposition over long periods of time and under severe operational conditions.Type: GrantFiled: June 2, 1980Date of Patent: October 6, 1981Assignee: Diamond Shamrock CorporationInventors: Jack A. Borror, Edward A. Rowe, Jr.
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Patent number: 4292462Abstract: Liquid, non-flammable dielectric compositions especially adapted as insulators/coolants for transformers and the like, are comprised of an admixture of [i] a bromochlorobenzene and [ii] a polychlorobenzene, and, optionally, [iii] a diluent therefor.Type: GrantFiled: March 18, 1980Date of Patent: September 29, 1981Assignee: Rhone-Poulenc IndustriesInventor: Bruno Rey-Coquais
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Patent number: 4283592Abstract: A splice case housing electrical splices between two cables where the splices are immersed in an oil sealant having a specific gravity greater than water. The case includes holes located above the splices for receiving the electrical cables. Since the oil is heavier than water, if water were to enter the splice case, it would be above the oil and splices, thereby causing a hydraulic force on the oil, causing an even more intimate seal of the oil around the splices.Type: GrantFiled: August 23, 1979Date of Patent: August 11, 1981Assignee: Akzona IncorporatedInventor: Kenneth W. Brownell, Jr.
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Patent number: 4235347Abstract: An air-tight molded resin enclosure for containing a fluid under pressure is disclosed. The enclosure includes a safety membrane which can rupture at a fluid pressure less than the pressure at which the enclosure will rupture. The enclosure may contain an electric device such as a circuit breaker and a pressurized insulating fluid such as sulfur-hexafluoride (SF.sub.6) gas. When an electric arc occurs in the circuit breaker, the pressure of the gas contained in the enclosure increases in magnitude. When a sizable over-pressure exists inside the air-tight enclosure, the safety membrane will rupture without damage to the circuit breaker or to any neighboring equipment. The safety membrane includes grooves which act as rupturing primers. The thickness of the safety membrane and the depth of the grooves determine the pressure at which the safety membrane will rupture.Type: GrantFiled: April 5, 1979Date of Patent: November 25, 1980Assignee: CEM Compagnie Electro-MecaniqueInventors: Rene Cothier, Sylvain Cagnioux
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Patent number: 4225747Abstract: An insulating fluid for impregnating the solid insulation of an oil-filled electric power cable, particularly for a cable to be submerged in water, which comprises at least one lower aliphatic derivative of napthalene, preferably, 1 methylnapthalene or 1, 2, 3, 4-tetrahydronapthalene, or mixtures thereof or a mixture of one or more lower aliphatic derivatives of naphthalene with a conventional impregnating fluid. In the latter case, the derivative is present in a significant amount and preferably, is present in an amount sufficient to provide a specific gravity substantially equal to the specific gravity of water. Also, an electric power cable having its insulation impregnated with such insulating fluid.Type: GrantFiled: July 17, 1978Date of Patent: September 30, 1980Assignee: Industrie Pirelli Societa per AzioniInventor: Bernardino Vecellio
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Patent number: 4196408Abstract: A power transformer having an operating temperature in excess of 200.degree. C. and including a casing or tank, an electrical core and coil assembly having an asbestos based barrier material and being supported in said casing, and a low cost saturated hydrocarbon insulating fluid substantially filling the casing and having a vapor pressure at 200.degree. C. less than 10 millimeters of mercury and a flash point in excess of 230.degree. C.Type: GrantFiled: July 28, 1975Date of Patent: April 1, 1980Assignee: RTE CorporationInventor: Edwin A. Link
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Patent number: 4190732Abstract: Fluid-filled electrical apparatus suitable for use in harsh environments. The electrical apparatus includes a tank having bottom and side members whose configuration provides corrosion protection for the electrical apparatus. A plurality of radially spaced, annular shoulders in the bottom member, with flanges therebetween, define a configuration wherein the innermost circular-shaped portion of the bottom member fits with the cylindrical side member with the lower edge of the side member disposed in proximity to one of the flanges in the bottom member to form a joint suitable for welding. The outwardmost flange of the bottom member extends downward from the joint and beyond the side member to provide an edge or rim upon which the entire tank rests and, further, presents sacrificial metal to the environment which protects the joint despite corrosion of the outermost flange.Type: GrantFiled: September 8, 1977Date of Patent: February 26, 1980Assignee: Westinghouse Electric Corp.Inventors: Dudley L. Galloway, Robert E. Donoghue
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Patent number: 4184059Abstract: A high dielectric strength seal between the encapsulant and the outwardly projecting actuating arm of an externally operable encapsulated vacuum switch includes a fluid-receiving sealed cavity surrounding the actuating arm between the latter and the encapsulant. An externally accessible valve permits charging of the cavity with a dielectric fluid subsequent to encapsulation of the switch to insure displacement of air from the interface between the encapsulant and actuating arm, thereby greatly reducing the likelihood of corona formation and dielectric breakdown of the seal. Additionally, the dielectric fluid may be pressurized through the valve to preclude infusion of conductive contaminants into the cavity. In preferred forms, an accumulator is in fluid communication with the cavity to permit thermal expansion and contraction of the dielectric fluid without undesired leakage or cavitation of the liquid.Type: GrantFiled: October 31, 1977Date of Patent: January 15, 1980Assignee: A. B. Chance CompanyInventors: Richard Graham, Eugene L. Kamp, Armin M. Bruning, Earl S. Gritton, L. Ronald Azdell
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Patent number: 4133970Abstract: An electrical insulation system includes a new and improved monolithic, polymeric, porous, open cell, fully impregnable, dielectric solid and an impregnating substance that may be applied to the dielectric solid either at the factory prior to shipment or in the field prior to or during installation. The dielectric solid is preformed to enable the quick and easy field installation of the insulation system in electrical apparatus. In addition, the porous, open cell nature of the dielectric solid in which very small communicating open cells are substantially evenly distributed throughout substantially all of the dielectric solid enables a dielectric fluid, such as a dielectric oil, to pass through the dielectric solid and thereby impart the self-healing characteristic of impregnated layered paper insulation to the new and improved insulation system. In a fluid dielectric system, the impregnating substance may be a dielectric oil or other dielectric liquid.Type: GrantFiled: December 30, 1975Date of Patent: January 9, 1979Assignee: Joslyn Mfg. and Supply Co.Inventor: George E. Lusk
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Patent number: 4132969Abstract: An ignition coil wherein the high tension terminal carried in a bore in the cap of the coil is movable relative to the cap. The terminal acts as a valve member in the bore and is movable between a position wherein the bore is closed and a position wherein the bore is open. The bore can be used as the means whereby oil is introduced into the casing of the coil if the coil is to be oil filled.Type: GrantFiled: May 20, 1977Date of Patent: January 2, 1979Assignee: Lucas Industries LimitedInventor: Peter T. Hillyard
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Patent number: 4108789Abstract: Dielectric compositions comprising benzyl esters of .alpha.-branched chain alkyl-substituted saturated monocarboxylic acids having improved thermal and chemical stability for extended periods of operation under varying conditions are provided.Type: GrantFiled: June 14, 1977Date of Patent: August 22, 1978Assignee: Rhone-Poulenc IndustriesInventors: Pierre Jay, Ghislain Schwachhofer
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Patent number: 4082866Abstract: The unique, relatively nonflammable, environmentally safe, insulating oil comprises a saturated hydrocarbon oil having a molecular weight of about 500 to about 700, and a fire point above 200.degree. C. The electrical equipment comprises an oil-sealed tank, a unique insulating oil filling said tank, and an electrical component such as a conductive coil immersed in said insulating oil. A method of filling the oil-sealed tank of an electrical apparatus with the unique insulating oil also is disclosed.Type: GrantFiled: September 25, 1975Date of Patent: April 4, 1978Assignee: RTE CorporationInventor: Edwin A. Link
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Patent number: 4060583Abstract: An electrically insulating composition especially adapted for insulating terminations or splices of oil-impregnated cables comprises an electrically insulating organic liquid and a reactive thickening agent. Initially the composition is a liquid having a low viscosity permitting it to be conveniently poured into place in a termination housing or splice casing. After reaction of the thickening agent, the composition thickens to prevent undesired drainage of the composition.Type: GrantFiled: August 6, 1976Date of Patent: November 29, 1977Assignee: Minnesota Mining and Manufacturing CompanyInventors: James D. Groves, Stefano Loffredo
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Patent number: 4019996Abstract: Liquid dielectric compositions useful as electrical insulators are comprised of [1] a liquid dielectric component of known type, in combination with [2] at least one member selected from the group consisting of monocyanophenoxybenzene, monocyanodiphenyl and monocyanoterphenyl.Type: GrantFiled: July 7, 1975Date of Patent: April 26, 1977Assignee: Rhone-Poulenc IndustriesInventors: Pierre Jay, Ghislain Schwachhofer
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Patent number: 4018693Abstract: The transformer oils of improved resistivity are prepared by adding an effective quantity of a carbonyl containing compound particularly an aldehyde or ketone to a conventional transformer oil.Type: GrantFiled: October 21, 1974Date of Patent: April 19, 1977Assignee: Texaco Inc.Inventors: Theodore C. Mead, William B. Ashton
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Patent number: 3986080Abstract: An oil-immersed type flyback transformer device wherein the container for the flyback transformer is made of plastic, whereby the ratio between the temperature coefficient of expansion of the capacity of the container with respect to the original capacity and the composite temperature coefficient of expansion of the volume of the whole assembly housed in the sealed container including the insulating oil is with respect to the original volume maintained within a predetermined range.Type: GrantFiled: December 3, 1974Date of Patent: October 12, 1976Assignee: Matsushita Electric Industrial Co., Ltd.Inventor: Sato, Kohei
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Patent number: 3980803Abstract: A stationary electric device such as, for example, a capacitor and a transformer, using linear phenylmethylsilicone oil as an impregnating oil is provided. The use of linear phenylmethylsilicone oil improves an anti-corona property as well as permits the miniaturization of the device.Type: GrantFiled: September 30, 1974Date of Patent: September 14, 1976Assignee: Tokyo Shibaura Electric Co., Ltd.Inventors: Sachio Yasufuku, Yasuaki Ishioka, Takeshi Tanii, Sigeo Nakayama
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Patent number: 3959162Abstract: An insulating oil for use in electrical devices, comprising a mixture of trixylenylphosphate and 10% to 40% by volume of insulating oil having a viscosity of 5 cp to 15 cp at 30.degree.C and selected from the group consisting of mineral oil, alkylbenzene, alkylnaphthalene, diallylalkane, 2-diphenylmethylether, 2-diphenyl-isopropylether, paraffin hydrocarbon oil and naphthene hydrocarbon oil.Type: GrantFiled: August 2, 1974Date of Patent: May 25, 1976Assignee: Nissin Electric Co., Ltd.Inventors: Mineaki Nishimatsu, Sadayoshi Mukai, Kaname Ishida