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:
Mar. 29, 2011
Filed:
Dec. 19, 2008
Applicant:
Roger J. Peirce, Bensalem, PA (US);
Inventor:
Roger J. Peirce, Bensalem, PA (US);
Assignee:
Illinois Tool Works Inc., Glenview, IL (US);
Primary Examiner:
Int. Cl.
CPC ...
G01R 29/12 (2006.01);
U.S. Cl.
CPC ...
Abstract
An apparatus for detecting a static field includes two surfaces of conductive material that are (i) electrically coupled to each other, and adjacent to each other. The two surfaces repel each other in the presence of a static field. The conductive material has a deformation property such that stress caused by repulsion of the two surfaces from each other by at least a predetermined distance causes at least one of the surfaces to permanently deform.