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BS 5550-3.10.1:1980
M00000105
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BS 5550-3.10.1:1980 Cinematography. 35 mm film. Sprockets. Specification for broad tooth sprockets for 35 mm perforated film
standard by BSI Group, 11/29/1965
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16-tooth intermittent, and 16-tooth, 24-tooth, 32-tooth feed, sound head and hold-back sprockets for use with cellulose nitrate film and cellulose acetate film. Dimensions for accurate engagement with film, minimize film wear, visual performance; dimensions for form of teeth. For motion picture techniques this type of sprockets is obsolescent.Cross References:
BS 5550:Subsection 3.1.1
BS 5550:Subsection 3.10.2