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:
Sep. 23, 1980
Filed:
Sep. 14, 1978
Douglas J Harvey, Sterling Heights, MI (US);
General Motors Corporation, Detroit, MI (US);
Abstract
This invention relates to an improved method of making a distributor rotor electrode wherein dielectric particles are dispersed in an electrically conductive metal matrix for suppressing radio frequency intereference. More particularly, the invention relates to a method of making such electrodes wherein a mixture comprised of silica and copper oxide is fused into a solid material which is then comminuted into powder particles 50 microns in size, or less, and having irregular shapes. The powder particles themselves are comprised of a microscopic interspersion of a silica based phase and a copper oxide based phase. These powder particles are thereafter combined with a powder of an electrically conductive metal to form a uniform second mixture comprising about 0.5 to 15 weight percent silica. The second mixture is then pressed in a compact for a rotor electrode body and sintered to form a wear resistant densified rotor electrode.