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. 19, 1988
Filed:
Jul. 14, 1987
John E Opie, Stony Creek, CT (US);
Echlin Inc., Branford, CT (US);
Abstract
A pulse generator employs a Wiegand wire module within two soft iron ferro-magnetic elements. Four magnets having appropriate polarities are positioned on faces of the ferro-magnetic elements to provide first and second magnetic circuits. The flux in these two magnetic circuits is collected, conducted and guided by the ferro-magnetic elements toward an air gap between the two guide elements. The center portion of the Wiegand wire is at the air gap. Cylindrical cavities in these two guide elements shield the ends of the Wiegand wire to minimize the incidence of external flux from the Wiegand wire. Saturation of the flux at the air gap between the two guide elements causes leakage flux to be incident on the Wiegand wire. The two magnetic circuits created by the magnets are approximately equal in magnitude and opposite in direction at the Wiegand wire. As a consequence, in the normal state, these two magnetic circuits do not affect the state of the Wiegand wire. When a soft iron ferro-magnetic shunt is brought adjacent to the two magnets which determine a first one of the magnetic circuits, an increase of flux in that first magnetic circuit switches the state of the Wiegand wire to a first switched state. When the shunt element is moved adjacent to the other two magnets, the flux from the second circuit increases to switch the Wiegand wire to a second switched state opposite to the first switched state.