Richardson's handbook of projection (1930)

Record Details:

Title:
Richardson's handbook of projection
Date:
1930
Publisher:
New York : Chalmers Publishing Company
Volume:
Richardson's handbook of projection
Leaf #:
000455
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:
March 28, 2024
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MANAGERS AND PROJECTIONISTS 1379 will give sound except the one attached to the fault} circuit. Trouble occurring in the circuits going to the fields of the units are the same as would occur to any line carrying D. C. They therefore should need little discussion. The trouble probably most frequently encountered would be low H batteries and blown fuses in the B box. Occasionally, in vaudeville theatres where the circuits to the horns are disconnected and plugged in again after acts, some careless one will neglect to re-connect the circuit by "plugging in." No sound from one or more of the horns will, of course, be the result, which is a matter up to the Manager or Stage Manager to deal with— and drastically, since the fault is utterly without any possible excuse. When the unit itself goes bad, there is nothing else to do except install a new one. A dead unit is almost always caused by a burned-out voice coil, which the projectionist certainly would have a hard time making the repair ; also such repair is strictly against ERPI orders. Do not attempt it. There are a few other troubles with which units are afflicted from time to time, such as rattling and a unit which is quite all right except on a certain portion of the frequency range. Again, in such cases the only thing to be done is install a new unit.