Journal of the Society of Motion Picture Engineers ( Volume: 57, Issue: 6, December 1951)

[ACTIVE]

The Radial-Tooth, Variable-Pitch Sprocket

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Publisher: SMPTE — White Plains, NY, USA
Doc Type: Journal Article
Content Type: Original Research
Abbreviated Title: J SMPTE
Volume: 57, No. 6, pp. 529–550
Abstract: A unique sprocket tooth whose driving face is a plane lying on a radius of the sprocket is used to improve longitudinal registration of the film over that obtained with conventionally shaped, curved-profile teeth. By supporting the film or films by means of an appropriately decentered drum while the films are in engagement with this sprocket, shrinkage accommodation is effected by virtue of the varying effective pitch of the sprocket. The variable-pitch effect also makes it possible to strip the film off the sprocket. — Calculated and measured flutter in sound prints and measured steadiness in picture prints made on a sprocket of this type in a 16-mm continuous contact printer are found to be substantially independent of film shrinkage and to be markedly better than in prints made on conventional printers.
Publication Date: 1951-12-01
DOI: 10.5594/J01217
ISSN: Print: 0898-042X
Link: https://doi.org/10.5594/J01217
Author(s): J. G. StreiffertJ. G. Streiffert, Eastman Kodak Co., Kodak Park Works, Rochester 4, N.Y.
Details: need to add references
Copyright: © 1951 Society of Motion Picture and Television Engineers, Inc.

Bibliographic Reference(s)

Some Theoretical Considerations in the Design of Sprockets for Continuous Film Movement [Active]
US1873778 — E. Mechau, March 1931 EXTERNAL
US2122458 — L. A. Elmer, June 1936 EXTERNAL
3. Chandler J. S. , “Some theoretical considerations in the design of sprockets for continuous film movement,” Jour. SMPE , vol. 37 , pp. 164 – 176 , Aug. 1941 . EXTERNAL

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J. G. Streiffert; The Radial-Tooth, Variable-Pitch Sprocket, Journal of the Society of Motion Picture Engineers ( Volume: 57, Issue: 6, December 1951); SMPTE, 1951. Available at https://doi.org/10.5594/J01217

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J. G. Streiffert; The Radial-Tooth, Variable-Pitch Sprocket, Journal of the Society of Motion Picture Engineers ( Volume: 57, Issue: 6, December 1951); SMPTE, 1951. Available at https://doi.org/10.5594/J01217

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<span class="citation">J. G. Streiffert; <cite>The Radial-Tooth, Variable-Pitch Sprocket</cite>, Journal of the Society of Motion Picture Engineers ( Volume: 57, Issue: 6, December 1951); SMPTE, 1951. Available at <a href="https://doi.org/10.5594/J01217" target="_blank" rel="noopener">https://doi.org/10.5594/J01217</a></span>

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J. G. Streiffert; The Radial-Tooth, Variable-Pitch Sprocket, Journal of the Society of Motion Picture Engineers ( Volume: 57, Issue: 6, December 1951); SMPTE, 1951
doi: 10.5594/J01217
url: https://doi.org/10.5594/J01217

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<li>
J. G. Streiffert; <cite id="bib-10-5594-j01217">The Radial-Tooth, Variable-Pitch Sprocket</cite>, Journal of the Society of Motion Picture Engineers ( Volume: 57, Issue: 6, December 1951); SMPTE, 1951
<span class="doi">10.5594/J01217</span>
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Referenced By

Second Installment: History of Sound Motion Pictures [Active]
Progress Committee Report [Active]
A Tutorial Paper: Motion-Picture Film — Its Size and Dimensional Characteristics [Active]
Standards and Recommended Practices [Active]
Coded Information within the Picture Area [Active]
SMPTE Standard for Television—Digital Representation and Bit-Parallel Interface—1125/60 High-Definition Production System [Active]
SMPTE Recommended Practice: 8-mm Type R (Regular 8) Sprocket Design [Active]
SMPTE RP 55:1997 [Active, Stabilized]
SMPTE RP 73:1992 [Active, Stabilized]
SMPTE RP 74:1992 [Active, Stabilized]