Servicing projection equipment (1932)

Page scan 00041 from Servicing projection equipment

Record Details:

Title:
Servicing projection equipment
Date:
1932
Publisher:
New York : Mancall Publishing Corp.
Volume:
Servicing projection equipment
Leaf #:
00041
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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LAMPHOUSE 25 LAMPHOUSE This section applies to the housing of the mechanism only. Troubles with Lamp, Carbons, etc., are listed under LIGHT SOURCE where they are actually observed. 1. Lamphouse is "Alive" It is charged with elect ri city and produces a shock, if touched. (a) — It may be an older type of lamphouse. See whether the lower jaw of the lamp, when it is tilted, touches the metal of the lamphouse. If so, insulate it with a sheet of non-conductive material such as asbestos between the jaw and the housing. (b) — In the newer model lamphouses when the metal is "alive," it is probably due to the following reasons : 1. The lamphouse is not grounded. 2. The ground connection to the lamphouse has been disconnected and a ground has allowed the current to escape from the carbon current-carrying jaws, arms or contacts. If the lamphouse is