Servicing projection equipment (1932)

Record Details:

Title:
Servicing projection equipment
Date:
1932
Publisher:
New York : Mancall Publishing Corp.
Volume:
Servicing projection equipment
Leaf #:
000128
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:
March 28, 2024
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112 LIGHT CONDITIONS 9. Poor Light With High Intensity Arc (a) — An incorrect amperage, to which the high intensity is extremely sensitive, may be the cause of this trouble. To remedy this follow the maker's instructions. (b) — Dirty, carelessly cleaned, ash-dulled mirrors may also cause this trouble. These should be cleaned or replaced. (c) — The positive contact shoe surfaces are corroded, or the ground may have become too large due to constant cleaning. 10. Uneven, Unsteady High Intensity Light (a) — This may be due to excessive current. Check the current, and if the meter reads normal, check the meter. Be sure to use a rated current for the carbons and the lamp. Also, be sure to use the proper carbon sizes and types for the current used. (b) — The arc length may be excessive and is therefore causing this trouble. Adjust the arc length by hand to better it slightly and adjust the controller to feed for a slightly shorter carbon separation. (c) — Occasionally this trouble is due to a bad carbon and it often occurs with poor, cheap carbons to which this arc is very sensitive. The best results