F. H. Richardson's bluebook of projection (1935)

Record Details:

Title:
F. H. Richardson's bluebook of projection
Date:
1935
Publisher:
New York : Quigley Publishing Company, Inc.
Volume:
F. H. Richardson's bluebook of projection
Leaf #:
000620
Language:
English
Subjects:
Motion Pictures, Motion Picture Technology
Collection:
Books
Format:
Books
Contributor:
Media History Digital Library
Sponsor:
{"Media History Digital Library","Jeff Joseph"}
Coordinator:
Media History Digital Library
Description:
Date Added:
August 01, 2024
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602 RICHARDSON'S BLUEBOOK OF PROJECTION d. c. and a. c. motors; and motor control circuits not involving vacuum tubes that are used with a. c. motors only. Fig. 145. — Drive using centrifugal cpced control. (9) Figure 145 is a picture of a d. c. motor equipped with centrifugal speed control. Figure 146 is a schematic diagram showing the working of this apparatus, and Figure 147 is a detailed drawing of its mechanical construction. The operation of this system is explained very clearly by Figure 146. The mechanical action is best studied in Figure 147. The centrifugal force of the motor's rotation (the same force that causes a revolving wheel to throw mud) drives the flyweights of the centrifugal device outward in opposition to the tension of a retaining spring, and compels the center on which they are pivoted