Cinematographic annual : 1930 (1930)

Record Details:

Title:
Cinematographic annual : 1930
Date:
1930
Publisher:
Hollywood : The American Society of Cinematographers, Inc.
Volume:
Cinematographic annual : 1930
Leaf #:
00094
Language:
English
Subjects:
Motion Pictures, Motion Picture Technology
Collection:
Books
Format:
Books
Contributor:
Media History Digital Library
Sponsor:
{"Media History Digital Library","Richard Koszarski","Jeff Joseph"}
Coordinator:
Media History Digital Library
Description:
Date Added:
March 21, 2024
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76 CINEMATOGRAPHIC ANNUAL Fig. 22 Mitchell Automatic Belt Tension Equalizer. This is an outgrowth of sound pictures, which simultaneously demanded the use of 1000 ft. rolls of Him, and precluded the use of the spring-belt of former days. In this case a leather belt is used, the springtension pulley arrangement automatically providing the correct tension as the diameter of the roll of exposed film in the magazine increases. Fig. 23 Bell H Howell Belt Tension Equalizer. A — Magazine Pulley. B — Endless Fabric Belt. C — Belt Tension Equalizing Spring. This tension equalizer can be used for magazines of either 1000 ft. or 400 ft. capacity. The belt is threaded differently oyer the pulleys of the equalizer when using 4 00 ft. magazines, in order that the slack in the belt may be completely compensated for.