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 #:
00084
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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534 HANDBOOK OF PROJECTION FOR treating whichever lamp you use as a separate unit, just as though the other lamp did not exist, projector table switch of idle lamp being, of course, open. WESTINGHOUSE SERIES ARC EQUIPMENT— This equipment consists of a motor generator wound for constant amperage and variable voltage, a control panel, a field rheostat motor starter, and a short circuiting switch for each projector lamp. The generator is marked 65/130 volts, which means that when carrying only one arc it will operate at approximately the lower voltage when arc is correctly adjusted, and when two arcs are operating in series the voltage will be the higher figure. THE SHORT CIRCUITING SWITCHES are single-pole single-throw knife switches. If mounted on the frame of the motion picture projector they must be enclosed in a suitable, approved protecting cover. If mounted on the switchboard panel, then no protecting cover is required. Type A Auto-Starter Figure 163 INSTALLATION— See General Instruction Nos. 1 and 2; also instructions for foundation, page 525. Control panel must be installed in the projection room, and in a place as convenient to the projectionists' working position as possible. The generator field rheostat is to be mounted on the control panel. The motor starting equipment should be either in the projection room, or in a room adjacent thereto.