(under the class definition) Subject matter including means to cyclically interrupt the light from the illuminator in the projector or to the sensitized carrier in the camera.
(1) Note. The light interruption is generally timed so as to occur during the movement of the picture carrier; although in projectors there are frequently light interruptions of integrally higher rate than the carrier movement rate to reduce flicker.
SEE OR SEARCH THIS CLASS, SUBCLASS:
76, for removable magazine type cameras with shutter type light traps.
149, for motion picture apparatus with auxiliary fire shutters.
164, for framing and/or travel ghost elimination with shutter synchronization; and subclass 165, for framing or ghost elimination structure involving shutter adjustment. 177, for drive mechanisms with shutter operated starting and/or stopping.
198, for projection light sources synchronized with the shutter.
SEE OR SEARCH CLASS
359, Optics: Systems (Including Communication) and Elements,
