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Journal of the Society of Motion Picture Engineers ( Volume: 35, Issue: 8, August 1940)
[ACTIVE]

Filtering Factors of the Magnetic Drive

Metadata

Publisher
SMPTE
Doc Type
Journal Article
Article Type
research-article
Abstract
A laboratory model of a magnetic-drive film-phonograph was modified so that speed fluctuations of large and measurable magnitude and of frequencies ranging from 1/2 to 7 cycles could be introduced either into the sprocket rotation or the magnet rotation. The resulting speed variations at the drum were determined by means of a “wowmeter.” The large ratios of flutter reduction indicated by these measurements show in part why the magnetic drive gives unsurpassed film motion.
Publication Date
1940-08-01
DOI
10.5594/J10057
Link
https://doi.org/10.5594/J10057
Author(s)
R. O. Drew, E. W. Kellogg
Source Data (JSON)

Full registry record with provenance metadata. Open directly: /api/doc/10.5594-J10057.json

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R. O. Drew and E. W. Kellogg; Filtering Factors of the Magnetic Drive, Journal of the Society of Motion Picture Engineers ( Volume: 35, Issue: 8, August 1940); SMPTE, 1940. Available at https://doi.org/10.5594/J10057
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R. O. Drew and E. W. Kellogg; Filtering Factors of the Magnetic Drive, Journal of the Society of Motion Picture Engineers ( Volume: 35, Issue: 8, August 1940); SMPTE, 1940. Available at https://doi.org/10.5594/J10057

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R. O. Drew and E. W. Kellogg; Filtering Factors of the Magnetic Drive, Journal of the Society of Motion Picture Engineers ( Volume: 35, Issue: 8, August 1940); SMPTE, 1940. Available at https://doi.org/10.5594/J10057
Snippet:
<span class="citation">R. O. Drew and E. W. Kellogg; <cite>Filtering Factors of the Magnetic Drive</cite>, Journal of the Society of Motion Picture Engineers ( Volume: 35, Issue: 8, August 1940); SMPTE, 1940. Available at <a href="https://doi.org/10.5594/J10057" target="_blank" rel="noopener">https://doi.org/10.5594/J10057</a></span>

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Preview:
R. O. Drew and E. W. Kellogg; Filtering Factors of the Magnetic Drive, Journal of the Society of Motion Picture Engineers ( Volume: 35, Issue: 8, August 1940); SMPTE, 1940
doi: 10.5594/J10057
url: https://doi.org/10.5594/J10057
Snippet:
<li>
R. O. Drew and E. W. Kellogg; <cite id="bib-10-5594-j10057">Filtering Factors of the Magnetic Drive</cite>, Journal of the Society of Motion Picture Engineers ( Volume: 35, Issue: 8, August 1940); SMPTE, 1940
<span class="doi">10.5594/J10057</span>
</li>