The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 30, 1981
Filed:
Mar. 30, 1976
Lyon Mandelcorn, Pittsburgh, PA (US);
Thomas W Dakin, Murrysville, PA (US);
Robert L Miller, Murrysville, PA (US);
Westinghouse Electric Corp., Pittsburgh, PA (US);
Abstract
Dielectric fluids are disclosed which comprise about 20 to 95% of a non-halogenated organic ester which is liquid between -20.degree. C. and 150.degree. C. and which has a dissipation factor of less than about 10% at 100.degree. C., and about 5% to 80% of a non-halogenated, aromatic hydrocarbon or ether, which is soluble in the ester, has 1 to 2 rings, and has a dissipation factor of less than about 10% at 100.degree. C. The preferred dielectric fluid is about 75 to 90% diisononyl phthalate and about 10 to 25% diphenyl oxide. An anti-oxidant and/or an additive to resist the effects of corona (partial discharges) are preferably included in the dielectric fluid. A capacitor containing a paper, film, or composite of these, impregnated with the dielectric fluid, is also disclosed.