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:
May. 09, 1989
Filed:
Apr. 15, 1988
Norman E Hoffman, Harrisburg, PA (US);
AMP Incorporated, Harrisburg, PA (US);
Abstract
A rotor (100,200,300l ) for a stator (50) of a rotary switch (10) includes a substrate (106,216,302) having a continuous conductive surface over which a profiled dielectric layer (110,218,316) is molded which includes arcuate groove segments (118) along concentric circles which expose portions of the continuous conductive surface and define switch-encoding circuit paths (120,222,322) for brush contact portions (66) of the stator (50). The dielectric material at the ends (122) of each groove segment (118) deflect the brush contact portions (66) away from the conductive surface during rotation of the rotor (100,200,300), and the brush contact portions thus do not engage corner edges of discrete circuit paths. Each layer (110,218,316) can have an annular detent surface (132,234,324) of a plurality of pointed embossments (130,230,326) defining radial grooves (136,232,328) therebetween at switch locations, cooperable with detent (74) of the stator (50) to accurately position the rotor (100,200,300) upon rotation. A method for making the rotor (100,200,300) includes variations for the conductive surface of the substrate to have electrically isolated inner (212,310) and outer (214,312) segments, where the inner segment (212,310) comprises the switch-encoding circuit paths (222,322) and the outer segment (214,312) underlies the detent surface (234,324) and enables electrical verification of the rotor attaining a switch position.