Journal of the Society of Motion Picture and Television Engineers ( Volume: 54, Issue: 1, January 1950)

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New Projection Lamp and Carbon-Feed Mechanism

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Publisher: SMPTE — White Plains, NY, USA
Doc Type: Journal Article
Content Type: Original Research
Abbreviated Title: J SMPTE
Volume: 54, No. 1, pp. 87–94
Abstract: This paper describes a new carbon-arc projection lamp employing an electronic system to provide automatic control of the carbon positions. Each carbon-feed mechanism is separately driven by an alternating-current motor actuated by an electronic impulse generator. Feeding speed of the carbons is controlled by varying the resistances through the generator control circuits to adjust the number of impulses supplied per minute to the alternating-current motors according to the carbon-consumption rates. A polarized directional electromagnet controls the position and shape of the tail flame.
Publication Date: 1950-01-01
DOI: 10.5594/J06381
ISSN: Print: 0898-042X
Link: https://doi.org/10.5594/J06381
Author(s): J. K. ElderkinForest Electronic Company, Inc., Newark 2, N.J.
Copyright: © 1950 Society of Motion Picture and Television Engineers, Inc.

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J. K. Elderkin; New Projection Lamp and Carbon-Feed Mechanism, Journal of the Society of Motion Picture and Television Engineers ( Volume: 54, Issue: 1, January 1950); SMPTE, 1950. Available at https://doi.org/10.5594/J06381

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J. K. Elderkin; New Projection Lamp and Carbon-Feed Mechanism, Journal of the Society of Motion Picture and Television Engineers ( Volume: 54, Issue: 1, January 1950); SMPTE, 1950. Available at https://doi.org/10.5594/J06381

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<span class="citation">J. K. Elderkin; <cite>New Projection Lamp and Carbon-Feed Mechanism</cite>, Journal of the Society of Motion Picture and Television Engineers ( Volume: 54, Issue: 1, January 1950); SMPTE, 1950. Available at <a href="https://doi.org/10.5594/J06381" target="_blank" rel="noopener">https://doi.org/10.5594/J06381</a></span>

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<li>
J. K. Elderkin; <cite id="bib-10-5594-j06381">New Projection Lamp and Carbon-Feed Mechanism</cite>, Journal of the Society of Motion Picture and Television Engineers ( Volume: 54, Issue: 1, January 1950); SMPTE, 1950
<span class="doi">10.5594/J06381</span>
</li>