A New 35-mm. Portable Projector
A new 35-mm. portable projector is described. The optical system consists of either the T-20, 900-watt or T-20, 1000-watt lamp, Bausch and Lomb Cinephor condensers, and the lens mounts are so constructed as to take full-size professional no. 2 or series II lenses. The projector is of the straight-through threading type. All the operating parts are directly connected to the motor, no belts being used. Framing is accomplished by the rotating-sprocket method. — A new type of sound gate without tension shoes forms part of the equipment. The revolving shutter is placed between the projection lamp and the aperture, and functions also as an automatic fire shutter. The equipment is entirely enclosed within its own case and weighs approximately 100 lbs.
- Print ISSN
- 0097-5834
- Published
- 1931-10
- Content type
- Original Research
- DOI
- 10.5594/J05575