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:
Jul. 03, 2001
Filed:
Feb. 18, 2000
Bernard DiMarco, Lilburn, GA (US);
Charles D. Garnto, Buford, GA (US);
Siemens Energy & Automation, Inc., Alpharetta, GA (US);
Abstract
An adjustable thermal-magnetic trip unit for a molded case circuit breaker,is disclosed, with the circuit breaker,including a housing,having an operating mechanism,including an intermediate latch,a line terminal,a load terminal,and a cover,The adjustable thermal-magnetic trip unit includes a magnetic yoke,mounted in the housing,and a bimetal member mounted in the magnetic yoke,with the bimetal member having a fixed end and a movable end. The fixed end is coupled to a load bus,of the load terminal,, and the movable end is coupled to a movable contact of the operating mechanism,The trip unit,also includes a horizontal trip bar rotatably mounted in the housing,with the trip bar,having an actuating arm gapped from the movable end of the bimetal member and with the actuating arm aligned to selectively engage the movable end of the bimetal member. The trip unit,also includes a latch pawl mounted on the trip bar,and having an inclined latching surface aligned with and engaging an inclined latch surface of the intermediate latch; and an adjustment knob associated with the trip bar, wherein rotation of the adjustment knob moves the trip bar horizontally and thereby moves the latch pawl along the inclined latching surface to change the gap between the actuating arm and the movable end of the bimetal member.