Nation projector carbons (1935)

Record Details:

Title:
Nation projector carbons
Date:
1935
Publisher:
Toronto : Canadian National Carbon Company Ltd.
Volume:
Nation projector carbons
Leaf #:
00029
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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The Carbon Arc physical fact, but it aids the imagination in visualizing a reason for the remarkably high intrinsic brilliancy, of the high intensity carbon arc as compared Figure 21 High Intensity Arc — D.C. TAIL FLAME CRATER with other artificial sources of illumination. The fact that the quantity and quality of light from the high intensity arc, operated at a given current, varies greatly with the manner in which the arc stream from the negative carbon impinges upon the flame of the positive, indicates that some condition obtains which is in a measure equivalent to that described. Instructions for adjusting the high intensity arc so as to obtain best results are given in Chapter VIII. The large high intensity projection lamps, developed to meet the needs of the larger theatres, cannot be used with economy in theatres of small and intermediate size. There is evident need, however, in theatres of the latter class, for a projection light of better quality, higher intrinsic brilliancy and greater volume than the low intensity D.C. arc is capable of providing. To meet this need, the principle 25