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:
Jun. 13, 1995
Filed:
Oct. 30, 1992
Gary W Scott, Mt. Vernon, IA (US);
Paul J Rustebakke, Cedar Rapids, IA (US);
Square D Company, Palatine, IL (US);
Abstract
The present invention provides a compact transformer with a magnetic core having at least two leg members and two side members. Each leg member has two ends and a peripheral surface therebetween. Each side member has a generally planar body with at least two notches corresponding in cross-sectional shape and size to the end of each leg member. The sides of each notch surround and abut a majority of the peripheral surface near each leg member end. The leg member end is secured to each notch. A magnetically coupled primary and secondary winding is arranged around each leg member. The transformer is particularly useful in sending current signals to an electronic trip unit of a circuit interrupter. The invention also includes a method of assembling a transformer which includes the steps of providing a magnetic core having at least two leg members with two ends and a peripheral surface therebetween and providing two side members of approximately the same shape having a generally planar body with at least two notches corresponding in cross-sectional shape and size to the end of each leg member. The method includes pressing and securing the peripheral surface near the end of each leg member against the sides of each notch so that the sides of each notch surround and abut a majority of the peripheral surface near each leg member end.