Servicing projection equipment (1932)

Page scan 00074 from Servicing projection equipment

Record Details:

Title:
Servicing projection equipment
Date:
1932
Publisher:
New York : Mancall Publishing Corp.
Volume:
Servicing projection equipment
Leaf #:
00074
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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58 MERCURY ARC RECTIFIER (e) — The tube does not tilt. Electrical rectification is not established. Look under the following heading. 2. Tube Does Not Tilt (a) — Friction is binding the tube. Test it bytilting it with the hand. If the tube binds, tilt it carefully and eliminate friction in the device. (b) — The tilting relay may not be making a contact. In this case look for the following : 1. Friction in the tilting relay. Find the friction and eliminate it. 2. Dirt, or some other obstruction prevents a contact. Remove the obstructions. 3. A bent stud may be the cause. Correct it if found. 4. The contact arm may be jammed. Straight en or loosen it. 5. The wire or the contact may be loose or broken. 6. The secondary coil of the magnet may be short-circuited. Test, repair, and replace it. 3. When Tilted By Hand, Tube Does Not Start; When Tilted By Shaking Magnet, Tube Does Not Tilt (a) — There probably is no current at the tube