(under the class definition) Subject matter including means to switch the lamp off and on or to otherwise modify the illumination intensity or means to adjustably position the lamp relative to other parts of the projector.
(1) Note. The projection light sources as here classified include a light source together with some picture-projector structure such as a slide changer or film gate. See Search Class note for illumination generally or where the picture projector is only nominally claimed.
(2) Note. Shutters or screens which merely block the light are provided for in subclass 88 below and are not in this subclass 85.
SEE OR SEARCH THIS CLASS, SUBCLASS:
43, for a battery-operated projector.
82, for a projector having a single light source and plural projection paths and which projector may have means to control its light source. SEE OR SEARCH CLASS
40, Card, Picture, or Sign Exhibiting,
541+, for illuminated signs, and subclasses 442+ for display devices with selective or intermittent illumination.
352, Optics: Motion Pictures, for illumination generally or where the picture projector is only nominally claimed;
198+, for motion-picture projection light sources.
355, Photocopying,
67+, for a projection printer having an illumination system or illumination details.
362, Illumination, especially
295, for light projectors with lamp control. See (1) Note above.
399, Electrophotography,
9+, for diagnostics, subclasses 38+ for controls, subclasses 130+ for image formation, subclasses 168+ for charging, and subclasses 177+ for exposure.
