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).

  • Patent number: 4679119
    Abstract: 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: Grant
    Filed: June 13, 1986
    Date of Patent: July 7, 1987
    Assignee: Emhart Industries, Inc.
    Inventor: Vandos Shedigian
  • Patent number: 4642731
    Abstract: A metallized film capacitor having a dielectric fluid comprising glyceryl triacetate and about 30 to 90 vol. percent of epoxidized soybean oil.
    Type: Grant
    Filed: June 16, 1986
    Date of Patent: February 10, 1987
    Assignee: Emhart Industries, Inc.
    Inventor: Vandos Shedigian
  • Patent number: 4626959
    Abstract: 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: Grant
    Filed: September 4, 1984
    Date of Patent: December 2, 1986
    Assignee: Emhart Industries, Inc.
    Inventors: Vandos Shedigian, Gerald A. Voyles
  • Patent number: 4621301
    Abstract: 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: Grant
    Filed: October 31, 1985
    Date of Patent: November 4, 1986
    Assignee: Emhart Industries, Inc.
    Inventor: Vandos Shedigian
  • Patent number: 4609969
    Abstract: A dielectric fluid for a metallized polypropylene film capacitor consisting essentially of Glyceryl Tri(acetoxystearate).
    Type: Grant
    Filed: October 22, 1984
    Date of Patent: September 2, 1986
    Assignee: Emhart Industries, Inc.
    Inventor: Vandos Shedigian
  • Patent number: 4609967
    Abstract: 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: Grant
    Filed: October 15, 1985
    Date of Patent: September 2, 1986
    Assignee: Emhart Industries, Inc.
    Inventor: Vandos Shedigian
  • Patent number: 4538206
    Abstract: Capacitance loss is reduced in metallized film capacitors by using a cycloaliphatic epoxide as a dielectric impregnant.
    Type: Grant
    Filed: May 31, 1984
    Date of Patent: August 27, 1985
    Assignee: Emhart Industries, Inc.
    Inventor: Vandos Shedigian
  • Patent number: 4538208
    Abstract: 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: Grant
    Filed: May 21, 1984
    Date of Patent: August 27, 1985
    Assignee: Emhart Industries, Inc.
    Inventor: Vandos Shedigian
  • Patent number: 4538207
    Abstract: 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: Grant
    Filed: March 29, 1984
    Date of Patent: August 27, 1985
    Assignee: Emhart Industries, Inc.
    Inventor: Vandos Shedigian
  • Patent number: 4536331
    Abstract: 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: Grant
    Filed: October 27, 1983
    Date of Patent: August 20, 1985
    Assignee: Emhart Industries, Inc.
    Inventor: Vandos Shedigian
  • Patent number: 4521826
    Abstract: 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: Grant
    Filed: February 25, 1980
    Date of Patent: June 4, 1985
    Assignee: Emhart Industries, Inc.
    Inventors: Vandos Shedigian, Gerald A. Voyles
  • Patent number: 4511949
    Abstract: 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: Grant
    Filed: December 19, 1983
    Date of Patent: April 16, 1985
    Assignee: Emhart Industries, Inc.
    Inventor: Vandos Shedigian
  • Patent number: 4498117
    Abstract: A dielectric fluid for a capacitor includes a mixture of a phthalate ester and an alkylated napthalene.
    Type: Grant
    Filed: November 25, 1983
    Date of Patent: February 5, 1985
    Assignee: Emhart Industries, Inc.
    Inventors: Gerald A. Voyles, Vandos Shedigian
  • Patent number: 4476516
    Abstract: 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: Grant
    Filed: October 24, 1983
    Date of Patent: October 9, 1984
    Assignee: Emhart Industries, Inc.
    Inventor: Vandos Shedigian
  • Patent number: 4459637
    Abstract: 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: Grant
    Filed: May 31, 1983
    Date of Patent: July 10, 1984
    Assignee: Emhart Industries, Inc.
    Inventor: Vandos Shedigian
  • Patent number: 4456945
    Abstract: 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: Grant
    Filed: July 1, 1982
    Date of Patent: June 26, 1984
    Assignee: Emhart Industries, Inc.
    Inventor: Vandos Shedigian
  • Patent number: 4420791
    Abstract: A dielectric fluid provides a mixture of a diarylethane compound and 10% to 80% by volume of an epoxide additive.
    Type: Grant
    Filed: December 28, 1981
    Date of Patent: December 13, 1983
    Assignee: Emhart Industries, Inc.
    Inventor: Vandos Shedigian
  • Patent number: 4381535
    Abstract: A dielectric fluid for a capacitor includes a mixture of phthalate ester, polychlorinated benzene and a linear alkylbenzene.
    Type: Grant
    Filed: March 5, 1981
    Date of Patent: April 26, 1983
    Assignee: Emhart Industries, Inc.
    Inventors: Vandos Shedigian, Gerald A. Voyles
  • Patent number: 4117579
    Abstract: 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: Grant
    Filed: July 20, 1977
    Date of Patent: October 3, 1978
    Assignee: General Electric Company
    Inventors: David G. Shaw, Vandos Shedigian