Appeal No. 1997-0907
Application 08/291,642
Representative claim 1 is reproduced below:
1. A magnetically biased electromagnetic shuttering
device for controlling the shutter blades of a camera, said
device characterized by:
a yoke comprising a core and a coil, said coil being
capable of receiving current produces a first magnetic field
existing inside and outside said core;
a movable magnet that is coupled to the shutter blades,
said magnet having a second magnetic field and being
positioned adjacent said core so that said second magnetic
field interacts with said first magnetic field; and
biasing means, separate from said yoke, for producing a
third magnetic field, said biasing means is positioned
adjacent said movable magnet in order to influence the motion
of said movable magnet and to provide controllable detents for
said movable magnet.
The following references are relied on by the examiner:
Shimada et al. (Shimada) 4,338,013 July
6, 1982
Wang 4,973,866 Nov.
27, 1990
Castor et al. (Castor) 5,155,522 Oct. 13,
1992
Claims 1 through 6 stand rejected under 35 U.S.C. § 103.
As evidence of obviousness, the examiner relies upon Castor,
further in view of Wang and Shimada.
2
Page: Previous 1 2 3 4 5 6 7 8 9 10 11 12 Next
Last modified: November 3, 2007