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:
Oct. 13, 1992
Filed:
Jul. 25, 1991
David A Castor, Webster, NY (US);
Tom M Seamans, Corfu, NY (US);
J Kelly Lee, Rochester, NY (US);
David R Dowe, Holley, NY (US);
Eastman Kodak Company, Rochester, NY (US);
Abstract
A system for electromagnetically activating the shutter of a camera to provide different aperture openings by providing: an armature comprising a core and a coil, the core is capable of receiving current and the armature will produce a first magnetic field; a movable magnet that produces a second magnetic field, the magnet is positioned within the core in a manner that a first gap, a second gap, a third gap, a fourth gap, a fifth gap, a sixth gap, a seventh gap and a eighth gap will contiguously surround the magnet and be present between the core and the magnet so that the second magnetic field is coupled to the first magnetic field and the magnet is coupled to the shutter; and means coupled to the current means and the coil for setting the direction of current flow in the coil to a first direction or a second direction or for denying the presence of current flow in the coil so that when the coil receives no current a first magnetic field will not be present and the magnet will be at a first location and move the shutter to block the aperture and allow no light to enter the camera, and when current flow through the coil in a first direction the magnet will be attracted by the first magnetic field and move to a second location and move the shutter to form a first aperture size and if current flows through the coil in a second direction the magnet will be attracted by the first magnetic field and move to a third location and move the shutter to form a second aperture size.