Servicing projection equipment (1932)

Record Details:

Title:
Servicing projection equipment
Date:
1932
Publisher:
New York : Mancall Publishing Corp.
Volume:
Servicing projection equipment
Leaf #:
000101
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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COMMUTATOR TROUBLES 85 COMMUTATOR TROUBLP^S 1. Commutator Bars Are Short-Circuited (a) — Failure to keep carbon dust cleared away and over-lubrication of the commutator which allow the space to fill with combined dust and oil, are a common cause of short-circuiting. Clean and avoid serious trouble through short-circuiting, overheating, arcing, sparking, etc. 2. Commutator Overheats (a) — This may be due to sparking. Look under section headed, Sparking. (b) — Constant overloading will also cause this, therefore it is necessary to reduce the overload. (c) — The brush pressure may be too great. Adjust the tension. 3. Commutator is Grooved (a) — The brushes are too hard. In this case it is best to follow the maker's recommendations for correction. (b) — The brushes may be of a cheap make and