Servicing projection equipment (1932)

Page scan 00059 from Servicing projection equipment

Record Details:

Title:
Servicing projection equipment
Date:
1932
Publisher:
New York : Mancall Publishing Corp.
Volume:
Servicing projection equipment
Leaf #:
00059
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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LIGHT SOURCE 43 for the size and rating of the lamp and for the type of carbons employed. (b) — The carbons may not have been properly lined up with one another. Make a correct alignment, and if the trouble disappears, maintain the new alignment. (c) — The ventilation may be incorrect thereby permitting strong drafts to act on the crater. Improperly designed lamphouses can bring about this condition if the door is open or if the independent vents in the housing have been cut. (d) — The positive carbon may not have been set to project sufficiently out of the heat shield. Set the carbon forward slightly, and if the condition disappears the trouble can be avoided in the future. Warning: Do not set the carbon too far forward as this causes it to burn excessive! y and will reduce its life considerably. (e) — The connections and contacts may be just loose enough to make a good contact, but with a bit of vibration to decrease contact. Examine all current-carrying contacts, also the screws, nuts, and springs controlling them and correct the deficiencies in steadiness or in good contact. Note: In those types of H.I. lamp where part of the current passes through the negative carbon from the holder end and the balance of the current