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Journal of the Society of Motion Picture Engineers ( Volume: 25, Issue: 5, November 1935)
[ACTIVE]

A Portable Flutter-Measuring Instrument

Metadata

Publisher
SMPTE
Doc Type
Journal Article
Article Type
research-article
Abstract
A portable flutter-measuring equipment is described which may be used to measure the uniformity of motion of recording and reproducing machinery. The instrument filters out noise components, magnifies the frequency modulation, converts it to amplitude modulation, and finally demodulates it to obtain an indication of the frequency variation present in the original signal. In flutter-correction work adjustments are made on the reproducer under the guidance of the measuring set. The cumulative effects of change of pressure or position of the guide shoes, alignment of sprockets or bearings, although individually small, are often considerable. To study flutter in recording machines 3000-cycle records are made, which are subsequently reproduced on known flutter-free machines and measured with the instrument.
Publication Date
1935-11-01
DOI
10.5594/J08743
Link
https://doi.org/10.5594/J08743
Author(s)
R. R. Scoville
Source Data (JSON)

Full registry record with provenance metadata. Open directly: /api/doc/10.5594-J08743.json

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R. R. Scoville; A Portable Flutter-Measuring Instrument, Journal of the Society of Motion Picture Engineers ( Volume: 25, Issue: 5, November 1935); SMPTE, 1935. Available at https://doi.org/10.5594/J08743
Snippet:
R. R. Scoville; A Portable Flutter-Measuring Instrument, Journal of the Society of Motion Picture Engineers ( Volume: 25, Issue: 5, November 1935); SMPTE, 1935. Available at https://doi.org/10.5594/J08743

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R. R. Scoville; A Portable Flutter-Measuring Instrument, Journal of the Society of Motion Picture Engineers ( Volume: 25, Issue: 5, November 1935); SMPTE, 1935. Available at https://doi.org/10.5594/J08743
Snippet:
<span class="citation">R. R. Scoville; <cite>A Portable Flutter-Measuring Instrument</cite>, Journal of the Society of Motion Picture Engineers ( Volume: 25, Issue: 5, November 1935); SMPTE, 1935. Available at <a href="https://doi.org/10.5594/J08743" target="_blank" rel="noopener">https://doi.org/10.5594/J08743</a></span>

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Preview:
R. R. Scoville; A Portable Flutter-Measuring Instrument, Journal of the Society of Motion Picture Engineers ( Volume: 25, Issue: 5, November 1935); SMPTE, 1935
doi: 10.5594/J08743
url: https://doi.org/10.5594/J08743
Snippet:
<li>
R. R. Scoville; <cite id="bib-10-5594-j08743">A Portable Flutter-Measuring Instrument</cite>, Journal of the Society of Motion Picture Engineers ( Volume: 25, Issue: 5, November 1935); SMPTE, 1935
<span class="doi">10.5594/J08743</span>
</li>