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:
Oct. 13, 1998
Filed:
Aug. 23, 1996
James Arthur Heise, Cedar Falls, IA (US);
Duane Lee Turner, Cedar Rapids, IA (US);
Dennis William Fleege, Cedar Rapids, IA (US);
Eugene Walter Wehr, Cedar Rapids, IA (US);
Square D Company, Palatine, IL (US);
Abstract
A circuit breaker device for interrupting current in a circuit path between a source and a load includes a first contact and a second contact cooperatively arranged in the circuit path so as to provide current from a source to a load. A trip mechanism assembly, which includes an armature, a bimetal and a yoke, is provided for interrupting the current. The armature includes an aperture in which a latch point is provided to engage a latching surface of a trip lever for latching the trip lever thereon. The amount of current that is required to cause the trip mechanism to interrupt the circuit path is determined by the amount of overlap between the latching surface and the latch point. This overlap is adjusted by bending a calibration plate by tightening a calibration screw which extends through an aperture in a circuit breaker housing and a slotted aperture in the calibration plate. A substantially square shaped nut secures the calibration screw tightly against the housing. The calibration plate includes a leg portion bent substantially perpendicular thereto which has a rounded end supported in a v-block formed in the housing. The rounded end provides a pivot for which the calibration plate rotates thereabout. The slotted aperture allows the calibration plate to slide horizontally and bend as the calibration screw is tightened into the square nut.