Richardson's handbook of projection (1927)

Record Details:

Title:
Richardson's handbook of projection
Date:
1927
Publisher:
New York : Chalmers Publishing Company
Volume:
Richardson's handbook of projection
Leaf #:
000507
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:
September 28, 2023
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MANAGERS AND PROJECTIONISTS 955 Figure 375 Weaver Curtain Control ing circuit is the other side, of line run through, first a threeway, and all other switches in this circuit four-ways ; from one corner of the last four-way to one breaker switch and from breaker switch to motor terminal No. 2; from opposite corner of last four-way to other breaker switch and from breaker to motor terminal No. 3; leads to motor terminals No. 2 and 3 may be reversed to cause motor to run in proper direction. As many switches may be installed as desired. We recommend at least one station back stage and one station at each position in projection room from which the projectionist is required to operate curtains. Breaker switches are of a standard make of switch, mounted with special bracket, in such a manner that the curtain itself causes them to operate, one for closed and one for open position, thus making it impossible to get curtain out of time with control device. It is a general practice also to wire in pilot lights which indicate position of curtains, for instance many theatres use two and three curtains and it is impossible for the projectionist to see what position the back curtains are in unless there