(under subclass 198) Subject matter including means to project a light on the screen during frame change or to provide a border around the projected picture so as to
minimize the differences in screen illumination during periods of projection and picture change.
(1) Note. The light projected on the screen during frame change by the devices herein classified bears no image.
SEE OR SEARCH THIS CLASS, SUBCLASS:
68, for motion picture projectors which project a picture from a separate film during the frame change of the first film.
134, for plural projectors with a single light source.
SEE OR SEARCH CLASS 472, Amusement Devices, particularly
61, for special stage lighting operated other than by a projector.
