Nation projector carbons (1935)

Record Details:

Title:
Nation projector carbons
Date:
1935
Publisher:
Toronto : Canadian National Carbon Company Ltd.
Volume:
Nation projector carbons
Leaf #:
00019
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:
May 30, 2024
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Manufacture of Projector Carbons Figure 7 View of Furnace Room are pointed and those that are oversize are ground to exact diameter. All National Projector Carbons are polished with the exception of High Intensity positive carbons. Since these must be rotated by the feeding mechanism of the high intensity lamp, they are thoroughly cleaned but not polished. After being stamped with the grade designation, each carbon passes through a thorough final inspection which includes x-ray examination of those types containing elements which are made visible by this method of inspection. Highly specialized equipment is required for the manufacture of projector carbons. At each stage of production, the greatest care is exercised to maintain the conditions which experience has proved essential to uniformity of product. Samples from every lot are tested by burning in the type of lamp for which they are intended. As a result of this extreme care and close technical control, the carbons reaching the user can be depended upon to give uniform quality and intensity of light as well as satisfactory performance in all other respects. 15