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. 08, 1992
Filed:
Sep. 26, 1989
Altenhof, Jr James N., West Bridgewater Boro., PA (US);
Ronald W Crookston, Trafford, PA (US);
Walter V Bratkowski, McKeesport, PA (US);
James W Barkell, Jr, Harrison City, PA (US);
Marvin D Fisher, Export, PA (US);
Westinghouse Electric Corp., Pittsburgh, PA (US);
Abstract
A molded case circuit breaker is provided with a pivotally mounted contact arm assembly, formed as a clinch joint. The contact arm assembly is a bifurcated assembly formed from two coextensive members fastened together at one end defining a surface for carrying a movable main contact. The other end of the members is bent outwardly defining spaced apart arm portions for receiving a pivot bracket. The pivot bracket is provided with an aperture and aligned with apertures in the spaced apart portions for receiving a pivot pin and defining a pivot axis. The pivot bracket is rigidly connected to a load conductor. The current that flows through the contact arm is transferred to bosses integrally formed adjacent the apertures in the pivot bracket. Screw adjustable spring members are provided for adjusting the friction and the electrical resistance between the contact surfaces of the contact arm assembly and the bosses.