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Journal of the Society of Motion Picture Engineers ( Volume: 38, Issue: 3, March 1942)
[ACTIVE]

A Constant-Torque Friction Clutch for Film Take-Up

Metadata

Publisher
SMPTE
Doc Type
Journal Article
Article Type
research-article
Abstract
An analysis of fractional take-up devices in general use discloses the reasons for their failure or improper operation. An improved friction clutch is described and analyzed, which embodies means for canceling the effect of a varying coefficient of friction encountered at variable slip speeds, thus maintaining a constant torque at the take-up spindle. Automatic declutching occurs when the load exceeds the amount of torque transmitted, thus protecting the film from excessive tension, and eliminating declutching levers and ratchets when rewinding. The novel construction enables bidirectional operation, both in direction of rotation and in direction of transmission of torque.
Publication Date
1942-03-01
DOI
10.5594/J09918
Link
https://doi.org/10.5594/J09918
Author(s)
William Hotine
Source Data (JSON)

Full registry record with provenance metadata. Open directly: /api/doc/10.5594-J09918.json

Reference this Doc

Plain text (ISO 690 compliant)

Preview:
William Hotine; A Constant-Torque Friction Clutch for Film Take-Up, Journal of the Society of Motion Picture Engineers ( Volume: 38, Issue: 3, March 1942); SMPTE, 1942. Available at https://doi.org/10.5594/J09918
Snippet:
William Hotine; A Constant-Torque Friction Clutch for Film Take-Up, Journal of the Society of Motion Picture Engineers ( Volume: 38, Issue: 3, March 1942); SMPTE, 1942. Available at https://doi.org/10.5594/J09918

HTML (ISO 690 compliant)

Preview:
William Hotine; A Constant-Torque Friction Clutch for Film Take-Up, Journal of the Society of Motion Picture Engineers ( Volume: 38, Issue: 3, March 1942); SMPTE, 1942. Available at https://doi.org/10.5594/J09918
Snippet:
<span class="citation">William Hotine; <cite>A Constant-Torque Friction Clutch for Film Take-Up</cite>, Journal of the Society of Motion Picture Engineers ( Volume: 38, Issue: 3, March 1942); SMPTE, 1942. Available at <a href="https://doi.org/10.5594/J09918" target="_blank" rel="noopener">https://doi.org/10.5594/J09918</a></span>

SMPTE Icon SMPTE's HTML Pub

Preview:
William Hotine; A Constant-Torque Friction Clutch for Film Take-Up, Journal of the Society of Motion Picture Engineers ( Volume: 38, Issue: 3, March 1942); SMPTE, 1942
doi: 10.5594/J09918
url: https://doi.org/10.5594/J09918
Snippet:
<li>
William Hotine; <cite id="bib-10-5594-j09918">A Constant-Torque Friction Clutch for Film Take-Up</cite>, Journal of the Society of Motion Picture Engineers ( Volume: 38, Issue: 3, March 1942); SMPTE, 1942
<span class="doi">10.5594/J09918</span>
</li>