Journal of the Society of Motion Picture Engineers ( Volume: 35, Issue: 8, August 1940)
[ACTIVE]
Filtering Factors of the Magnetic Drive
Metadata
- Publisher
- SMPTE — White Plains, NY, USA
- Doc Type
- Journal Article
- Content Type
- Original Research
- Abbreviated Title
- J SMPE
- Volume
- 35, No. 8, pp. 138–164
- 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- ISSN
- Print:
0097-5834 - Link
- https://doi.org/10.5594/J10057
- Author(s)
- R. O. DrewE. W. KelloggRCA Manufacturing Co., Camden, N. J.
- Copyright
- © 1940 Society of Motion Picture and Television Engineers, Inc.
Bibliographic Reference(s)
- 1 . ellogg K W. E. : “A New Recorder for Variable-Area Recording,” J. Soc. Mot. Pict. Eng. , XV (Nov., 1930 ), p. 653 . EXTERNAL
- 2 . ellogg K W. E. : “A Review of the Quest for Constant Speed,” J. Soc. Mot. Pict. Eng. , XXVIII (April, 1937 ), p. 337 . EXTERNAL
- 3 . ellogg K W. E. : U. S. Pat., Nos. 1,892,554; 1,899,571; and Re. 19,270. EXTERNAL
- 4 . ook C D. E. : “The Technical Aspects of the High-Fidelity Sound Head,” J. Soc. Mot. Pict. Eng. , XXV (Oct., 1935 ), p. 289 . EXTERNAL
- 5 . Morgan A. R. ellogg K W. E. : “Measurement of Speed Fluctuations in Sound Recording and Reproducing Equipment,” J. Acoust. Soc. Amer. , 7 (April, 1936 ). EXTERNAL
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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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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
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>