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 #:
000211
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 1135 continue in action, however, and the fourth or amplifier tube instead of being operated from the tuned circuit, is controlled by means of a resistance connected to the control knob, which therefore regulates the speed as desired when it is turned. Further refinements are introduced into the motor control box circuits to sharpen the speed regulation and eliminate any tendency to momentary unsteadiness of speed, but these do not affect the main principles which have just been outlined.