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. 28, 1996
Filed:
Nov. 30, 1994
Donald S Foreman, Fridley, MN (US);
Honeywell Inc., Minneapolis, MN (US);
Abstract
A device for transferring electrical power from a stationary member to a rotatable member is provided by incorporating an air core transformer of which a first coil is rigidly attached to the stationary member and a second coil is rigidly attached to the rotatable member. A power converter is provided to convert input power from a first frequency to a second frequency. The first frequency can be that of a wall service within a family residence and the second frequency can be approximately 30 thousand hertz. The second frequency is provided to the electrical conductor of a first coil. The first and second coil of an air core transformer are used to transfer power across an air gap to the second coil. The transferred electrical power is then rectified to provide DC power to a plurality of electrical components that are rigidly attached to the rotatable member.