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. 27, 1990
Filed:
Apr. 10, 1989
Applicant:
Inventor:
Hemant K Mody, Rochester, NY (US);
Assignee:
Eastman Kodak Company, Rochester, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03B / ; G02B / ; H01H / ;
U.S. Cl.
CPC ...
3541951 ; 350255 ; 361147 ;
Abstract
An axial magnet actuator is disclosed in which a member formed of a magnetic material is movable relative to a frame along an axis. Electromagnets are positioned along the axis at spaced locations. In order to keep the mass of the movable member as small as possible, no magnetic elements are located on the member. An annular permanent magnet is located along the axis between the electromagnets and functions with the electromagnets to move the member, keep the member suspended in an axial direction, and hold the member in a selected position when the electromagnets are not energized.