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:
Feb. 26, 2008
Filed:
Apr. 05, 2005
Todd M. Lathrop, Oakdale, PA (US);
Derrick G. Berad, Pittsburgh, PA (US);
Todd M. Lathrop, Oakdale, PA (US);
Derrick G. Berad, Pittsburgh, PA (US);
Eaton Corporation, Cleveland, OH (US);
Abstract
A transfer switch includes first terminals adapted to input power from a first power source, second terminals adapted to input power from a second power source, third terminals adapted to output power to a first load, and a transfer mechanism adapted to selectively electrically connect the one of the first or second terminals to the third terminals. A control mechanism cooperates with the first and second terminals and the transfer mechanism to electrically connect one of the first and third terminals or the second and third terminals. A control circuit and a relay include normally closed contacts and normally open contacts. The relay is de-energized responsive to the first and third terminals being electrically connected, and energized responsive to the second and third terminals being electrically connected. The normally closed contacts shed corresponding second loads and the normally open contacts enable corresponding third loads when the relay is energized.