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:
Jan. 06, 1998
Filed:
Apr. 24, 1996
Michael Joseph O'Brien, Rochester, NY (US);
Robert Cooper Bryant, Honeoye Falls, NY (US);
Richard Alexander Colleluori, Rochester, NY (US);
Eastman Kodak Company, Rochester, NY (US);
Abstract
A device for controlling an amount of light allowed to reach a photosensitive surface includes a movable light regulating member, an electrically conductive coil mounted to move with the member, a first permanent magnet having a north pole located adjacent a first side of the coil, and a second permanent magnet having a south pole located adjacent the first side of the coil. The invention is characterized by third and fourth permanent magnets located adjacent a second side of the coil. A north pole of the third magnet is located opposite the south pole of the second magnet and a south pole of the fourth magnet is located opposite the north pole of the first magnet. When electrical current is passed through the coil in one direction, the member is moved in a first direction, and when electrical current is passed through the coil in another direction, the member is moved in a second direction.