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. 29, 2010
Filed:
May. 25, 2005
James Stephen Mahon, Newton-le-Willows, GB;
James Stephen Mahon, Newton-le-Willows, GB;
Lem Heme Limited, Skelmersdale, Lancashire, GB;
Abstract
Current testing/measuring apparatuscomprises a flexible memberhaving a first endand a second end. In use, the flexible memberis arranged to locate around a conductorcarrying a current to be measured. In particular, the current measuring apparatuscomprises a Rogowski coil. The ends of the flexible memberare coupled together in use but a gap is created between the ends. This distance can generate errors in the current measurement and the present invention provides compensation meansin the form of a compensation windings. The compensation windings comprise a planar spiral conductor provided on a printed circuit board to compensate for the separation distance between the first end and the second end.