Photography – Camera detail – Shutter
Patent
1994-08-17
2000-09-26
Gray, David M.
Photography
Camera detail
Shutter
310 36, G03B 908
Patent
active
061234680
ABSTRACT:
A magnetically biased electromagnetic shuttering device for controlling the shutter blades of a camera. The device includes a yoke having a core and a coil, the coil being capable of receiving current which produces a first magnetic field existing inside and outside the core. A movable magnet is coupled to the shutter blades, has a second magnetic field and is positioned adjacent to the core so that the second magnetic field interacts with the first magnetic field. A magnet, separate from the yoke, produces a third magnetic field and is positioned adjacent to the movable magnet in order to influence the motion of the movable magnet and to provide controllable detents for the movable magnet.
REFERENCES:
patent: 3517599 (1970-06-01), Sapp, Jr. et al.
patent: 3635141 (1972-01-01), Starp et al.
patent: 4088405 (1978-05-01), Pustka et al.
patent: 4338013 (1982-07-01), Shimada et al.
patent: 4497557 (1985-02-01), Petersen
patent: 4564278 (1986-01-01), Ohmura
patent: 4702583 (1987-10-01), Yoshino et al.
patent: 4973866 (1990-11-01), Wang
patent: 5126605 (1992-06-01), Palmero
patent: 5155522 (1992-10-01), Castor et al.
Clemens Hopfner, Photographic Shutter Oct. 1980 Research Disclosure No. 19844.
Furlani Edward P.
Lee J. Kelly
Eastman Kodak Company
Gray David M.
Howley David A.
Novais David A.
LandOfFree
Magnetically biased electromagnetic shuttering device for contro does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Magnetically biased electromagnetic shuttering device for contro, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Magnetically biased electromagnetic shuttering device for contro will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2094589