The Educational screen (c1922-c1956])

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RCA "400" Projector the thread-easy way to show sound films Thread-Easy film path makes threading a simple, understandable operation. You can thread it, and put a picture on the screen in seconds. (In tests at a trade show, 473 guests proved you can thread the RCA "400" in less than 30 seconds.) way to handle films In years to come, you'll appreciate the careful way your RCA "400" projector handles film. Slow-running sprockets— twice the size of ordinary sprockets— provide a long, gradual curve for film to follow. The thread-easy film path does away with sharp bends which tear or scuff film. It's designed to give you hundreds of first-run showings from every film. {In actual tests a film— run through the RCA "400" projector 700 times — shows no sign of wear. Splices fail to show any sign of parting after hundreds of passes through the projector.) For careful film handling, tell your RCA Dealer you want the RCA "400" 16mm sound projector. Check these 6 important adTantajes of the RCA "400" Projector 1. 2. 3. Thread-Easy film path for 30second threading Low-speed induction motor for quiet operation Floating sprockets for gentle (ilm handling 4. Husky motor, nylon gears for long-term dependability 5. Simplified design for 2-minute set-up, 3 minute pack-up O. RCA-engineered sound system for superb reproduction RADIO CORPORATION of AMERICA mOUCATtOMAL SBRVICKS, CAM D KM. M.J. March. 1953 EDUCATIONAL SERVICES, DEPT. 400 Radio Corporation of America, Camden, N. J. Please send me your new, free booklet, RCA "400" Senior and Junior Sound Film Projectors. Name SchooL Address. City -Zone JState_ 97