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, 2007
Filed:
Apr. 13, 2006
Kevin Woolsey, Snohomish, WA (US);
L. Mark Marion, Woodinville, WA (US);
Steven Knudson, Seattle, WA (US);
Kevin Woolsey, Snohomish, WA (US);
L. Mark Marion, Woodinville, WA (US);
Steven Knudson, Seattle, WA (US);
Crane Co., Lynnwood, WA (US);
Abstract
A Hall effect generator chip is mounted between adjacent ends of an annular, horseshoe spacer of nonmagnetic material. The generator is sensitive to the flux density (B field) tangential to its top and bottom surfaces. The spacer and generator are sandwiched between ferromagnetic rings, each having a small air gap overlying/underlying the generator. A circuit including the generator supplies an output linearly proportional to the current of an adjacent conductor with reduced hysteresis and small variability over a temperature range.