US PATENT SUBCLASS 352 / 180
.~ With speed regulation or selection

Current as of: June, 1999
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352 /   HD   OPTICS: MOTION PICTURES

166  DF  CAMERA AND/OR PROJECTOR DRIVE MECHANISMS {14}
180.~ With speed regulation or selection {2}
181  DF  .~.~> By escapement
182  DF  .~.~> By braking

DEFINITION

Classification: 352/180

(under subclass 166) Subject matter including means to prevent variations in the speed of operation of the drive mechanism or to regulate to a predetermined speed of operation of the mechanism.

SEE OR SEARCH THIS CLASS, SUBCLASS:

21, for motion pictures with sound synchronizing by speed regulation.