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. 23, 2020
Filed:
Mar. 15, 2018
Applicant:
Gmw Associates Incorporated, San Carlos, CA (US);
Inventors:
Ian James Walker, Woodside, CA (US);
Karron Louis Law, Cheney, WA (US);
Assignee:
GMW ASSOCIATES INCORPORATED, San Carlos, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01R 15/20 (2006.01); G01R 19/00 (2006.01);
U.S. Cl.
CPC ...
G01R 15/202 (2013.01); G01R 19/0092 (2013.01); G01R 15/207 (2013.01);
Abstract
A coreless current probe has a body defining an opening. A conductor carrying a current to be measured can be accommodated in the opening. At least three coreless single point magnetic field sensors are distributed in or on the body around the opening. The sensors are arranged so that the sum of the outputs each with appropriate weighting is zero in any homogenous field and with no enclosed current. The sensors outputs have differing weightings so as to maximize rejection by the probe of external magnetic fields.