Patent ID: 9671676
Date: 2017-06-06
CPC Classifications: G03B

Claim:
1. A shutter assembly, comprising: a plurality of shutter blades movable between an open position and a closed position; a plurality of drive mechanisms arranged circumferentially about the plurality of shutter blades for moving the plurality of shutter blades; wherein each of said drive mechanisms is stable in at least a first position and a second position; wherein each drive mechanism is a linear drive mechanism that comprises: a solenoid with a solenoid frame with coils wound on a portion of the frame, the solenoid having a first axis about which the coils are azimuthally wound; and a permanent magnet armature movable linearly within the solenoid frame along the first axis; wherein the first position of the drive mechanism has the permanent magnet armature substantially encased within the solenoid frame and the second position of the drive mechanism has the permanent magnet armature extended relative to the solenoid frame.