McAulay Fisher Nissen Goldberg & Kiel, LLP
Electromagnetic lens shutter apparatus
 Disclosed is an electromagnetic lens shutter apparatus of simple construction which can be applied to a camera having an automatic exposure control function and an automatic focus control function. The electromagnetic lens shutter apparatus comprises a lens mount; at least two sheet-like lens shutter blades; an exposure adjustment ring; opening means for opening and closing the shutter blades; and a central processing unit to control the rotation of a linear pulse motor. The linear pulse motor includes a circular rotor mounted around the cylindrical portion and a plurality of stators placed around the rotor, each stator has two armatures mounted on an inner circumference thereof with a predetermined distance from the rotor. The rotor has a plurality of projections on the outer circumference thereof projected radially outwardly at regular intervals. A permanent magnet is provided between the stators. 
Samsung Aerospace Industries, Ltd.
G G G
G03B G03B G03B
inventional inventional inventional
Jae-kyeong Deog-ho Seon-ho
Seo Choi Lee