Nation projector carbons (1935)

Page scan 00094 from Nation projector carbons

Record Details:

Title:
Nation projector carbons
Date:
1935
Publisher:
Toronto : Canadian National Carbon Company Ltd.
Volume:
Nation projector carbons
Leaf #:
00094
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
Date Added:
May 15, 2025
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National Projector ( larbons to the trim, is much higher for these high intensity arcs than for the low intensity arc where the highest brilliancy is confined to the crater floor. This fact, together with the development of a projection lens, accepting a much wider cone of light than was formerly possible, has led to the use of reflectors having a larger angle of light pick-up than those used in the low intensity D.C. mirror arc lamps. From the foregoing facts, it is evident that the needs of the smaller theatres for projection light of higher intensity and better quality have been met effectively and efficiently by the A.C. high intensity and Suprex type arcs. Screen illumination 60 to 200 per cent greater than that obtainable from the low intensity arc has been provided. The increase in operating cost is so small that it is readily absorbed by the improved patronage which high intensity projection and a more comfortable level of general illumination attract. 90