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:
Nov. 20, 1984
Filed:
Jan. 04, 1982
John R Wiegand, Valley Stream, NY (US);
John E Opie, Stony Creek, CT (US);
Echlin Manufacturing Company, Branford, CT (US);
Abstract
A Wiegand wire module is excited by a non-uniform field, which may vary in time either symmetrically or asymmetrically, to provide a switch in state of the Wiegand wire thereby inducing a pulse in the pickup coil of the module. The non-uniform field has a maximum value in an axial direction at a center portion of the wire and a minimum value in an axial direction at end portions of the wire. As the amplitude of the field is varied to switch the wire, the end portions of the wire remain in a field having a low axial magnitude. The result is an output pulse substantially greater than obtained through symmetric exitation using a uniform field.