Patents by Inventor Vandos Shedigian
Vandos Shedigian has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 4679119Abstract: Di octyl phthalate (DOP) is used as a dielectric fluid for a-c electrical capcitors. An additive of an epoxidized linseed oil in an amount from 0.1% to 30% by weight of DOP stabilizes the capacitors and thus prolongs their life.Type: GrantFiled: June 13, 1986Date of Patent: July 7, 1987Assignee: Emhart Industries, Inc.Inventor: Vandos Shedigian
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Patent number: 4642731Abstract: A metallized film capacitor having a dielectric fluid comprising glyceryl triacetate and about 30 to 90 vol. percent of epoxidized soybean oil.Type: GrantFiled: June 16, 1986Date of Patent: February 10, 1987Assignee: Emhart Industries, Inc.Inventor: Vandos Shedigian
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Patent number: 4626959Abstract: A dielectric fluid for a metallized polypropylene film capacitor including about 90% to about 100% by volume glycenyl tri (epoxy acetoxystearate) or glyceryl tri (acetoxystearate), each being an ester with about 90% acetostearic acid.Type: GrantFiled: September 4, 1984Date of Patent: December 2, 1986Assignee: Emhart Industries, Inc.Inventors: Vandos Shedigian, Gerald A. Voyles
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Patent number: 4621301Abstract: A dielectric fluid for a metallized film capacitor consisting essentially of glyceryl triacetate and 0.01 to 10 weight % of a hindered phenolic antioxidant of N,N'-bis[3-(3',5'-di-tert-butyl-4'-hydroxyphenyl)propionyl] hydrazine. The capacitor body includes metallized polypropylene film forming the electrodes and a separating dielectric.Type: GrantFiled: October 31, 1985Date of Patent: November 4, 1986Assignee: Emhart Industries, Inc.Inventor: Vandos Shedigian
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Patent number: 4609969Abstract: A dielectric fluid for a metallized polypropylene film capacitor consisting essentially of Glyceryl Tri(acetoxystearate).Type: GrantFiled: October 22, 1984Date of Patent: September 2, 1986Assignee: Emhart Industries, Inc.Inventor: Vandos Shedigian
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Patent number: 4609967Abstract: A dielectric fluid for a metallized film capacitor consisting essentially of 75 volume % glyceryl triacetate and 25 volume % 3,4-epoxycyclohexylemethyl-3,4-epoxycyclohexane carboxylate. The capacitor body includes metallized polypropylene film forming the electrodes and a separating dielectric.Type: GrantFiled: October 15, 1985Date of Patent: September 2, 1986Assignee: Emhart Industries, Inc.Inventor: Vandos Shedigian
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Patent number: 4538208Abstract: A method is provided for gelling a dielectric in an alternating current capacitor of the type having a housing enclosing a pair of convolutely wound electrodes and dielectric spacers interleaved therebetween for separating the electrode with at least one of the electrodes being formed by a metallized film and using a dielectric of soybean oil, the method comprising adding an alkylhydroxyphenlalkanolyhydrazine compound to the soybean oil to gel the same within the housing so as to reduce its mobility and maintain the dielectric in proximity to the electrodes for reducing electrical corona discharge between the electrodes and for reducing electrical erosion of the electrodes.Type: GrantFiled: May 21, 1984Date of Patent: August 27, 1985Assignee: Emhart Industries, Inc.Inventor: Vandos Shedigian
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Patent number: 4538206Abstract: Capacitance loss is reduced in metallized film capacitors by using a cycloaliphatic epoxide as a dielectric impregnant.Type: GrantFiled: May 31, 1984Date of Patent: August 27, 1985Assignee: Emhart Industries, Inc.Inventor: Vandos Shedigian
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Patent number: 4538207Abstract: The gas absorption ability of a phthalate ester is improved by the addition of an alkylated benzene with 18 carbons outside the benzene ring. This also improves the swellability of polypropylene film capacitors.Type: GrantFiled: March 29, 1984Date of Patent: August 27, 1985Assignee: Emhart Industries, Inc.Inventor: Vandos Shedigian
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Patent number: 4536331Abstract: Soybean oil is used as a non-toxic dielectric fluid for a-c electrical capacitors. An additive of butylated hydroxyanisole is provided to prevent the soybean oil from becoming rancid. Another additive of .alpha.-dodocene-tetradecene is provided as a gas absorber for the soybean oil.Type: GrantFiled: October 27, 1983Date of Patent: August 20, 1985Assignee: Emhart Industries, Inc.Inventor: Vandos Shedigian
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Patent number: 4521826Abstract: In a capacitor, a dielectric fluid including 0 to about 10 wt. % of an antioxidant, 0 to about 10 wt. % of an epoxide stabilizer, the remainder essentially a compound with more than two stearate groups. The presently preferred compound of the dielectric fluid is glyceryl tri(acetoxystearate). A primary function of the dielectric fluid is to help prevent air from contacting the capacitor body of the capacitor. The capacitor body includes as its dielectric a plastic film such as polypropylene and the above mentioned dielectric fluid. Air pockets in and around the capacitor body are impregnated with such fluid to minimize disruptive electrical or corona discharges without harmfully swelling the plastic film to thereby improve the operating efficiency of such capacitor.Type: GrantFiled: February 25, 1980Date of Patent: June 4, 1985Assignee: Emhart Industries, Inc.Inventors: Vandos Shedigian, Gerald A. Voyles
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Patent number: 4511949Abstract: A capacitor includes a dielectric separator that includes a polypropylene film, and a dielectric fluid that consists essentially of about 100% by volume of an alkylated biphenyl for enhancing swelling in said film of from about 5% to about 15% by volume dependent on temperature.Type: GrantFiled: December 19, 1983Date of Patent: April 16, 1985Assignee: Emhart Industries, Inc.Inventor: Vandos Shedigian
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Patent number: 4498117Abstract: A dielectric fluid for a capacitor includes a mixture of a phthalate ester and an alkylated napthalene.Type: GrantFiled: November 25, 1983Date of Patent: February 5, 1985Assignee: Emhart Industries, Inc.Inventors: Gerald A. Voyles, Vandos Shedigian
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Patent number: 4476516Abstract: Isopropyl biphenyl is used as a dielectric fluid for a-c electrical capacitors. An additive of an epoxide having the chemical name 3,4-epoxycyclohexylmethyl-3,4-epoxycyclohexane carboxylate in an amount of at least 30% by volume of the dielectric fluid increases its dielectric constant.Type: GrantFiled: October 24, 1983Date of Patent: October 9, 1984Assignee: Emhart Industries, Inc.Inventor: Vandos Shedigian
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Patent number: 4459637Abstract: In a capacitor, a dielectric provides zero to about 10 weight percent of an antioxidant and glyceryl triacetate. The capacitor body includes metallized polypropylene film forming the electrodes and a separating dielectric. Air is excluded from the capacitor body during construction and dielectric fluid is prevented from impregnating the body and from imbibing into the polypropylene film by the characteristics of the glyceryl triacetate. By means of this construction, disruptive electrical or corona discharges and their harmful effects are reduced.Type: GrantFiled: May 31, 1983Date of Patent: July 10, 1984Assignee: Emhart Industries, Inc.Inventor: Vandos Shedigian
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Patent number: 4456945Abstract: A capacitor of the type including a pair of rolled electrode sheets and dielectric spacer interleaved therebetween with the dielectric spacer including at least one sheet of polypropylene film, provides the dielectric spacer with at least one sheet of polyethylene teraphthalate film.Type: GrantFiled: July 1, 1982Date of Patent: June 26, 1984Assignee: Emhart Industries, Inc.Inventor: Vandos Shedigian
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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: 4381535Abstract: A dielectric fluid for a capacitor includes a mixture of phthalate ester, polychlorinated benzene and a linear alkylbenzene.Type: GrantFiled: March 5, 1981Date of Patent: April 26, 1983Assignee: Emhart Industries, Inc.Inventors: Vandos Shedigian, Gerald A. Voyles
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Patent number: 4117579Abstract: Between about 0.01 and 10.0% by weight of an antioxidant, and between about 0.1 and 10% by weight of an epoxide are added to a liquid aromatic ester prior to refining or purification of the ester and prior to the use of the ester to impregnate a capacitor.Type: GrantFiled: July 20, 1977Date of Patent: October 3, 1978Assignee: General Electric CompanyInventors: David G. Shaw, Vandos Shedigian