Motion picture handbook; a guide for managers and operators of motion picture theatres ([c1916])

Page scan 000448 from Motion picture handbook; a guide for managers and operators of motion picture theatres

Record Details:

Title:
Motion picture handbook; a guide for managers and operators of motion picture theatres
Date:
[c1916]
Publisher:
New York City, The Moving Picture World
Volume:
Motion picture handbook; a guide for managers and operators of motion picture theatres
Leaf #:
000448
Language:
English
Collection:
Books
Format:
Books
Contributor:
University of California Libraries
Sponsor:
MSN
Coordinator:
Media History Digital Library
Date Added:
July 19, 2022
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FOR MANAGERS AND OPERATORS 429 favor of "understandableness." To tell exactly what happens inside of a rectifier tube would be a good deal like trying to explain what electricity is or to explain the reason for the force of gravity. Electrical engineers acquainted with the mercury arc rectifier have various opinions as to exactly what takes place inside the tube, and while I have every respect for the opinion of these eminent gentlemen I am advancing a theory which, while it may be entirely wrong, sounds to me like common sense. In fact I wrote it with two ends in view, viz.: first, to make the matter understandable to the ordinary operator; second, to set forth my view of what ought to take place, simply viewing the matter in the light of common sense. With this explanation the following is submitted: Principle of Operation. — The mercury arc rectifier consists essentially of a sealedglass bulb, from which the air has Figure 213. been exhausted, provided with four terminals, A, Al, B and C, Fig. 213. Within this tube is a quantity of mercury the purpose of which will be explained further on. The two upper terminals A, Al, Fig. 213, are of graphite or other suitable material, and the two lower ones B, C, Fig. 213, are of mercury, the smaller one of the two, C, Fig. 213, being