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 #:
000161
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:
March 28, 2024
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MANAGERS AND PROJECTIONISTS 1085 generator, and after the generator had been operated for some time, a compound known as lead peroxide had formed on the surface of the plate connected to the positive terminal of the generator, which plate he very properly dubbed the "positive plate." He further found that the surface of the other plate, called the "negative plate/' had been changed into spongy or porous lead. Plante further discovered that when he disconnected the two plates from the generator and used them as a power source, not only was he able to get power from the "battery" thus formed, but also the lead peroxide formed on the positive, and the spongy lead of the negative plate reacted chemically with the sulphuric acidwater solution (electrolite) so that he had two plates completely covered with lead sulphate. A. Positive Plate B. Negative Plate Figure 402. C. Wood Separator When he again connected these sulphated plates to the generator, he found that in due time they returned again to their original condition, the positive being again coated with lead peroxide and the negative again pure, spongy lead. That is an explanation of how the thing works. It is the principle underlying all lead-acid storage batteries. It works precisely the same as it did when Plante discovered it over in France something like forty years ago.