Servicing projection equipment (1932)

Page scan 00078 from Servicing projection equipment

Record Details:

Title:
Servicing projection equipment
Date:
1932
Publisher:
New York : Mancall Publishing Corp.
Volume:
Servicing projection equipment
Leaf #:
00078
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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62 MERCURY ARC RECTIFIER (b) — A magnetic action may be setting np between the transformer of the device and some nearby sheet metal. (c) — The cover of the mechanism may be loose or vibrating. Close the cover and tighten it. (d) — The reactance coil may be loose on the frame. Adjust it more solidly. (e) — The reactance coil airgap may not be wedged tightly. Note this and remedy it if necessary. Warning: When first putting the mercury arc rectifier into operation be sure the potential relay operates or else the limiting resistance will overheat and may damage the insulation on the wires and injure itself, even though it is not apt to burn out. Emergency Measure : If no replacement tube is on hand or if the rectifier fails to work entirely, cut it out of the circuit and shift to A.C. Caution : Do Not Fail to disconnect the D.C. arc controller motors when shifting over to A.C. For Screen Trouble when shifting to A.C, look under heading Picture.