New Projection Lamp and Carbon-Feed Mechanism

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.

Print ISSN

0898-042X

Published

1950-01

Content type

Original Research

DOI

10.5594/J06381