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:
Apr. 08, 1997
Filed:
May. 30, 1996
Edward P Furlani, Lancaster, NY (US);
Paul L Taillie, Rochester, NY (US);
Thomas M Stephany, Churchville, NY (US);
Eastman Kodak Company, Rochester, NY (US);
Abstract
An improved hard stop for use with an aperture mechanism is comprised of at least one blade moveable along a path between a closed position and at least one open position, and at least one hard stop 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 a hard stop piston. The improved hard stop is comprised of a magnetic piston, an electromagnet that is positioned proximate the magnetic piston for causing the magnetic piston to move to the first position when current is applied to the electromagnet in a first direction and for causing the magnetic piston to move to the second position when current is applied to the electromagnet in a second direction. A first ferromagnet is positioned at the first position to maintain the magnetic piston at the first position when current ceases to be applied to the electromagnet in the first direction. A second ferromagnetic is positioned at the second position to maintain the magnetic piston at the second position when current ceases to be applied to the electromagnet in the second direction.