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 #:
000699
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 681 Negative Film developed after exposure in a camera. Its lights are dark and its darks light, as compared with the positive. Negative Carbon In d.c. lamps the carbon connected to the negative side of the circuit. In a.c. lamps each carbon is alternately negative and positive. Negative Wire Wire attached to negative side of the power source. Neutral Wire The central wire in a 3-wire system. It is negative to one outside wire — the true positive; and positive to the other — the true negative. Neutral Ammeter An ammeter connected into the neutral wire to enable those in charge to know how nearly the load is in balance. Nickel Steel Ordinary soft steel to which' a small percentage of nickel has been added. About 3.25 percent of nickel gives best results. Observation Port Opening in wall through which the projectionist observes the screen. Ohm The unit of electrical resistance. Oil Well In a projector, an oil tight casing containing the intermittent movement, together with sufficient oil for its adequate lubrication. In a motor or generator, a depression in the metal immediately under each bearing,