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:
Sep. 21, 2010
Filed:
Jun. 06, 2007
Applicants:
Lihua HU, Derby, GB;
David R Trainer, Derby, GB;
Michael P Hirst, Derby, GB;
Stuart Galloway, Edinburgh, GB;
Inventors:
Lihua Hu, Derby, GB;
David R Trainer, Derby, GB;
Michael P Hirst, Derby, GB;
Stuart Galloway, Edinburgh, GB;
Assignee:
Rolls-Royce plc, London, GB;
Primary Examiner:
Int. Cl.
CPC ...
H02H 3/22 (2006.01); H02H 1/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
In a DC electrical power system used in an aircraft, an earthing arrangement is provided between electrical power supply rails in the form of a pair of capacitors with a mid electrical voltage earthing point, having an earthing path, in which electrical resistance is provided to limit electrical current flow and therefore allow continued operation despite the earth fault.