US PATENT SUBCLASS 352 / 176
.~.~ Responsive to camera or projector elements

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

166  DF  CAMERA AND/OR PROJECTOR DRIVE MECHANISMS {14}
174  DF  .~ With starting and/or stopping means {3}
176.~.~ Responsive to camera or projector elements {1}
177  DF  .~.~.~> Shutter responsive

DEFINITION

Classification: 352/176

(under subclass 174) Subject matter including means to operate the starting or stopping means in response to a predetermined condition (e.g., position, speed, etc.) of other elements of the camera or projector.

SEE OR SEARCH THIS CLASS, SUBCLASS:

143+, for fire prevention devices which stop the operation of a motion picture projector in response to film position or speed to prevent fire.