F. H. Richardson's bluebook of projection (1935)

Record Details:

Title:
F. H. Richardson's bluebook of projection
Date:
1935
Publisher:
New York : Quigley Publishing Company, Inc.
Volume:
F. H. Richardson's bluebook of projection
Leaf #:
000703
Language:
English
Subjects:
Motion Pictures, Motion Picture Technology
Collection:
Books
Format:
Books
Contributor:
Media History Digital Library
Sponsor:
{"Media History Digital Library","Jeff Joseph"}
Coordinator:
Media History Digital Library
Description:
Date Added:
June 04, 2024
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DEFINITIONS 685 tween the placement of one frame of film over the projector aperture and the placement of the next succeeding frame. Potential Voltage or level of electric pressure in volts. Potential Difference The drop in pressure across current-using equipment that produces power. Projection Lens The compound lens by means of which the screen image is projected. Projection Room The enclosure housing the projector apparatus. The room from which motion pictures are projected. Polyphase Current Any current having more than two phases. Port In projection, an opening in the front wall of the projection room through which a light beam passes or the screen is observed. Positive Brush The d.c. dynamo or motor brush connected to the positive side of the circuit or system being served. Positive Carbon In projection, the d.c. arc lam]) carbon attached to the positive side. The carbon on which the crater forms. In an a.c. arc each carbon is alternately positive and negative many times a second, hence a crater forms on each carbon. Positive Pole Pole of dynamo, battery or motor to which positive