Servicing projection equipment (1932)

Page scan 00070 from Servicing projection equipment

Record Details:

Title:
Servicing projection equipment
Date:
1932
Publisher:
New York : Mancall Publishing Corp.
Volume:
Servicing projection equipment
Leaf #:
00070
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
Date Added:
May 15, 2025
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54 LENSES LENSES Optical Train 1. Condenser Breakage Excessive (a) — This trouble may be due to the fact that the mount clutches the edge of the lens too tightly or to the fact that the mount does not expand with but contracts faster than the glass. This can be remedied only by obtaining a more modern type of condenser mount or one made by a reputable maker. (b) — The condenser is placed too close to the arc, thereby overheating it and then straining it in cooling. Locate the arc further from the condenser. (c) — The flaming of the arc overheats the lamphouse. Keep the ventilating flue and its screen clean and free for the passage of air. (d) — Poor ventilation with an excessive arc heat will bring the lamphouse temperature to a point where the condenser breakage will be very high. If good ventilation is provided, clean the flue regularly and prevent trouble. (e) — Too sudden cooling of hot condensers will also cause this trouble. Cool air on a hot mount