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 #:
000195
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:
August 01, 2024
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MANAGERS AND PROTECTIONISTS 1119 B, Fig. 407, indicates the switch with which the change is made from projector No. 1 to projector No. 2, or vice versa. If you remember that only the heavy black lines are to be considered in this matter, and that each such line represents a 2-wire circuit, I believe you should have no difficulty in understanding the diagram. Figure 408. Fader with Cover Removed. A — Fader cut-out switch. B — Cut-out switch. C C C — Indicate parts which have no bearing upon the fader action. They are not in faders of latest types. D — Castiron frame which supplies a holding bearing for fader knob and parts which it operates. G — A metal disc electrically connected to one side of the circuit, the other side of which is connected to the round contacts surrounding the disc, to each of which a small resistance coil connects. H — Contact arm connecting with disc G through sliding contact L and with arm J which makes sliding contact with contact discs surrounding metal disc G. K K connection for rod extending from fader at one projector to fader at the other one.