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:
Apr. 04, 2000
Filed:
Nov. 10, 1997
John A Ayres, Lapeer, MI (US);
David L Ehle, Attica, MI (US);
Michael E Salmon, Madison, AL (US);
Craig A Ayres, Lapeer, MI (US);
Nu-Tech & Engineering, Inc., Lapeer, MI (US);
Abstract
A miniature crossed coil gauge is provided having an oriented rare earth magnet fixedly mounted on a rotary shaft for supplying a magnetic flux directed transverse to the shaft axis. The gauge housing provided by an upper and lower bobbin surrounds the magnet and supports the rotary shaft. A first and second coil are wound about the gauge housing in a crossed coil orientation encircling the magnet. A flux ring is disposed around the first and second coils axially aligned with respect to the magnet. The magnet has sufficient strength and the flux ring is mounted in sufficiently close proximity to the first and second coils to redistribute the flux supplied by the magnet so that the magnetic flux measured at the surface of the coils is substantially increased relative to the magnetic flux density measured with the flux ring removed. This gauge construction facilitates the fabrication of gauges so small that they can be directly mounted on printed circuit boards using conventional electronic component mounting equipment.