Film conversion sprocket

Optics: motion pictures – With plural picture sizes and types

Patent

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Details

352168, 226 76, G03B 100, G03B 124

Patent

active

054792231

ABSTRACT:
A sprocket assembly is provided which allows a film projector or any other film handling device to be readily converted to run film having different perforation-to-frame ratios. The sprocket assembly includes an outer cylindrical sleeve having teeth for engaging the film perforations when the film is run, and an inner cylindrical sleeve adapted to fit within and anti-rotationally mate with the outer cylindrical sleeve. The inner sleeve also has teeth for engaging the film perforations. The inner sleeve is mounted on a rotatable shaft of the projector, and the outer sleeve can be added or removed.

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"Three-perforation at Clarimont," American Cinematographer, Dec. 1988.
"Trilent 35 System," Image Technology, Jul. 1988.
"Kodak's Coleman on HDTV and the Future of Film," International Photographer, Oct. 1988, pp. 16-19.
"Study Group on 30 Frame Film Rate," International Photographer, Dec. 1988, at p. 20.
"Television--Merging Multiple Technologies", presented at The 24th Annual SMPTE Television Conference, Jan. 26-27, 1990, Disney Contemporary Resort, Lake Buena Vista, Fla.
"35 mm--The Next 100 Years--3 or 4 PERF, 24 or 30 FPS--An Available Solution For The Dilemma," presented at The 24th Annual SMPTE Television Conference, Jan. 26-27, 1990, Disney Contemporary Resort, Lake Buena Vista, Fla.

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