Richardson's handbook of projection (1927)

Page scan 000422 from Richardson's handbook of projection

Record Details:

Title:
Richardson's handbook of projection
Date:
1927
Publisher:
New York : Chalmers Publishing Company
Volume:
Richardson's handbook of projection
Leaf #:
000422
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
Date Added:
August 01, 2024
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326 HANDBOOK OF PROJECTION FOR key way will ever wear out, and that is one of the weak points in all old style reels; in fact it might be truthfully said that the weakest point of the many weak points in old style reels was the key way. (F) In its center, within the hub, the reel contains an automatic dissolving signal, as will be explained further along. IN THREADING the reel the projectionist passes the end of the film under either one of studs A A, Fig. 90c, both of which are bright nickeled, being certain the end of the film is underneath, as per Fig. 90c. //■ I x# ■/ if M \\ '"$ m ■ "W^^^r"5 [ . ' ^^ ^Ny ^^Si>^*. ^^ \$n TBKS^Bm^\ A ;|I '4 \ \ A l ■Pjr ^ d ■ A 1S3 y?J jm$J 'jBBsSir 1 \ ^l j ; Figure 90d. IMPORTANT. — The time you will have for making the dissolve after the signal is given, depends, within reasonable limits, upon the length of the end of the film pulled under stud A. The longer this end the more time there will be after the signal sounds before the screen goes white. When you have end E as long as you wish, you must give the reel at least one full turn in the direction it normally runs, which not only locks the film by friction upon itself