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:
Jul. 14, 1998
Filed:
Nov. 18, 1996
Edward P Furlani, Lancaster, NY (US);
Bijan Barzideh, Rush, NY (US);
Eastman Kodak Company, Rochester, NY (US);
Abstract
An hard stop is disclosed for use with an aperture mechanism that has at least one blade moveable along a path between a closed position and at least one open position, and at least one hard stop piston that is moveable between a first position, out of the blade path, and a second position, in the blade path, to position the blade in the open position when an edge of the blade contacts the hard stop piston. The hard stop includes a nonmagnetic piston; a ferromagnetic C-core, having first and second pole tips, a magnet attached to the piston and a coil wrapped around the midportion of the C-core. When current is applied in one direction through the coil it causes the magnet and attached piston to move in a first direction to the first position and held in such position by the attraction of the magnet to the first pole tip of the C-core and causes the magnet and attached piston to move to the second position when current is applied in an opposite direction to the coil where it is held in such position by the attraction of the magnet to the second pole tip of the C-core.