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Journal of the Society of Motion Picture Engineers ( Volume: 17, Issue: 4, October 1931)
[ACTIVE]

A New 35-MM. Portable Projector

Metadata

Publisher
SMPTE — White Plains, NY, USA
Doc Type
Journal Article
Content Type
Original Research
Abbreviated Title
J SMPE
Volume
17, No. 4, pp. 623–631
Abstract
A new 35-mm. portable projector is described. The optical system consists of either the T-20, 900-watt or T-20, 1000-watt lamp, Bausch and Lomb Cinephor condensers, and the lens mounts are so constructed as to take full-size professional no. 2 or series II lenses. The projector is of the straight-through threading type. All the operating parts are directly connected to the motor, no belts being used. Framing is accomplished by the rotating-sprocket method. A new type of sound gate without tension shoes forms part of the equipment. The revolving shutter is placed between the projection lamp and the aperture, and functions also as an automatic fire shutter. The equipment is entirely enclosed within its own case and weighs approximately 100 lbs.
Publication Date
1931-10-01
DOI
10.5594/J05575
ISSN
Print: 0097-5834
Link
https://doi.org/10.5594/J05575
Author(s)
Herbert GriffinInternational Projector Corporation, New York, N. Y.
Copyright
© 1931 Society of Motion Picture and Television Engineers, Inc.
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Preview:
Herbert Griffin; A New 35-MM. Portable Projector, Journal of the Society of Motion Picture Engineers ( Volume: 17, Issue: 4, October 1931); SMPTE, 1931. Available at https://doi.org/10.5594/J05575
Snippet:
Herbert Griffin; A New 35-MM. Portable Projector, Journal of the Society of Motion Picture Engineers ( Volume: 17, Issue: 4, October 1931); SMPTE, 1931. Available at https://doi.org/10.5594/J05575

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Preview:
Herbert Griffin; A New 35-MM. Portable Projector, Journal of the Society of Motion Picture Engineers ( Volume: 17, Issue: 4, October 1931); SMPTE, 1931. Available at https://doi.org/10.5594/J05575
Snippet:
<span class="citation">Herbert Griffin; <cite>A New 35-MM. Portable Projector</cite>, Journal of the Society of Motion Picture Engineers ( Volume: 17, Issue: 4, October 1931); SMPTE, 1931. Available at <a href="https://doi.org/10.5594/J05575" target="_blank" rel="noopener">https://doi.org/10.5594/J05575</a></span>

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Preview:
Herbert Griffin; A New 35-MM. Portable Projector, Journal of the Society of Motion Picture Engineers ( Volume: 17, Issue: 4, October 1931); SMPTE, 1931
doi: 10.5594/J05575
url: https://doi.org/10.5594/J05575
Snippet:
<li>
Herbert Griffin; <cite id="bib-10-5594-j05575">A New 35-MM. Portable Projector</cite>, Journal of the Society of Motion Picture Engineers ( Volume: 17, Issue: 4, October 1931); SMPTE, 1931
<span class="doi">10.5594/J05575</span>
</li>

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