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Journal of the Society of Motion Picture Engineers ( Volume: 49, Issue: 4, October 1947)
[ACTIVE]

A Photoelectric Film Cuing System

Metadata

Publisher
SMPTE
Doc Type
Journal Article
Article Type
research-article
Abstract
A photoelectrically operated cuing system has been developed which avoids the difficulties associated with lack of standardization on edge-notching of film, increases the ease of changing the cuing marks, and also makes feasible concurrent cuing of both light change and special effects. This system has been applied successfully to a standard Bell and Howell Model J printer. However, the features discussed are general and applicable to any type of film-moving system. Spots of white lacquer between the sprocket holes are illuminated by a small beam of light. The reflected light causes a discontinuity in the photoelectric-tube current which is amplified to operate a relay. The printer exposure channel actuates the normal light-change solenoid while the relay in the effect channel is used to initiate fade-in, fade-out cycles through the medium of a magnetic clutch which engages a rheostat in the lamp circuit. Practical operating experience and detailed mechanical features are described.
Publication Date
1947-10-01
DOI
10.5594/J11802
Link
https://doi.org/10.5594/J11802
Author(s)
Irwin A. Moon
Source Data (JSON)

Full registry record with provenance metadata. Open directly: /api/doc/10.5594-J11802.json

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Irwin A. Moon; A Photoelectric Film Cuing System, Journal of the Society of Motion Picture Engineers ( Volume: 49, Issue: 4, October 1947); SMPTE, 1947. Available at https://doi.org/10.5594/J11802
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Irwin A. Moon; A Photoelectric Film Cuing System, Journal of the Society of Motion Picture Engineers ( Volume: 49, Issue: 4, October 1947); SMPTE, 1947. Available at https://doi.org/10.5594/J11802

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Irwin A. Moon; A Photoelectric Film Cuing System, Journal of the Society of Motion Picture Engineers ( Volume: 49, Issue: 4, October 1947); SMPTE, 1947. Available at https://doi.org/10.5594/J11802
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<span class="citation">Irwin A. Moon; <cite>A Photoelectric Film Cuing System</cite>, Journal of the Society of Motion Picture Engineers ( Volume: 49, Issue: 4, October 1947); SMPTE, 1947. Available at <a href="https://doi.org/10.5594/J11802" target="_blank" rel="noopener">https://doi.org/10.5594/J11802</a></span>

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Preview:
Irwin A. Moon; A Photoelectric Film Cuing System, Journal of the Society of Motion Picture Engineers ( Volume: 49, Issue: 4, October 1947); SMPTE, 1947
doi: 10.5594/J11802
url: https://doi.org/10.5594/J11802
Snippet:
<li>
Irwin A. Moon; <cite id="bib-10-5594-j11802">A Photoelectric Film Cuing System</cite>, Journal of the Society of Motion Picture Engineers ( Volume: 49, Issue: 4, October 1947); SMPTE, 1947
<span class="doi">10.5594/J11802</span>
</li>