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:
May. 14, 2013
Filed:
Nov. 05, 2010
Applicants:
Klaus Bohnert, Oberrohrdorf, CH;
Stephan Wildermuth, Muelligen, CH;
Hubert Braendle, Oberengstringen, CH;
Inventors:
Klaus Bohnert, Oberrohrdorf, CH;
Stephan Wildermuth, Muelligen, CH;
Hubert Braendle, Oberengstringen, CH;
Assignee:
ABB Research Ltd, Zürich, CH;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01R 33/02 (2006.01);
U.S. Cl.
CPC ...
Abstract
Two transversely poled fibers are disclosed which can be wound around a holder with their poling directions being anti-parallel. A coupling exchanges the polarization directions of the modes of the fibers. Thermally and mechanically caused birefringence changes can thereby be substantially cancelled, while electrical field induced birefringence changes can be added, to provide a more robust high voltage measuring device.