Servicing projection equipment (1932)

Page scan 000160 from Servicing projection equipment

Record Details:

Title:
Servicing projection equipment
Date:
1932
Publisher:
New York : Mancall Publishing Corp.
Volume:
Servicing projection equipment
Leaf #:
000160
Language:
English
Subjects:
Motion Pictures, Motion Picture Technology
Collection:
Books
Format:
Books
Contributor:
Media History Digital Library
Sponsor:
Media History Digital Library
Coordinator:
Media History Digital Library
Description:
Date Added:
August 15, 2024
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144 SPOTLIGHT 3. Rings and Shadows Show in Spotlight Beam (a) — Improper setting of carbons. Adjust and test. (b) — Wrong style, grade, or size of carbons — especially with A.C. An A.C. spotlight requires much care in choice of carbons and is likely to be hard to handle. Be sure that the carbons are not at fault. 4, Poor Lighting With Spot (a) — In ordinary arcs lack of brilliancy is due to improper choice of carbons. (b) — With A.C. the amperage materially affects the quality of the light, as also does the type of carbons used. Correct amperage and carbon grade and size and type should be chosen for the best conditions.