F. H. Richardson's bluebook of projection (1942)

Page scan 000388 from F. H. Richardson's bluebook of projection

Record Details:

Title:
F. H. Richardson's bluebook of projection
Date:
1942
Publisher:
New York : Quigley Publishing Company, Inc.
Volume:
F. H. Richardson's bluebook of projection
Leaf #:
000388
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:
July 11, 2024
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372 RICHARDSON'S BLUEBOOK OF PROJECTION A.C. LOW-INTENSITY SPOT AND FLOOD LAMPS AMP. VOLT. UPPER CARBON LOWER CARBON 30-60 35 H" x 12" W.F.A.C. Proj. 5/8" x 6" W.F.A.C. Proj. 60-80 35 3/4" x 12" W.F.A.C. Proj. %" x 6" W.F.A.C. Proj. D.C. HIGH-INTENSITY SPOT AND FLOOD LAMPS AMP. VOLT. POSITIVE CARBON NEGATIVE CARBON 85-95 58-62 11/mm x 20" H.I. Proj. 11/32" x 9" Orotip Cored 100-110 63-66 13.6/mm x 22" H.I. Proj. H" x 9" Orotip Cored 110-125 66-68 13.6/mm x 22" H.I. Proj. 7/16" x 9" Orotip Cored WHITE FLAME A.C. PROJECTOR CARBON COMBINATIONS UPPER LOWER AMP. VOLT. CARBON CARBON 25-40 25-28 Y2" x 12" y2" x 6" 40-60 28-32 Vs" x 12" y&" x 6" 60-75 32-35 V4" x 12" Va" x 6" 75-100 35-40 Vs" x 12" Vs" x 6" H.I. TRIMS USING ''VICTORY" CARBONS Brought out in 1942 for the wartime purpose of conserving copper, this series — called "Victory Carbons" — was given a thinner copper coating than the types they were designed to replace, requiring adjustment of arc current to conform to the ratings. Trim characteristics follow : TYPE OF LAMP ARC AMPERAGE "1 Ky" High Intensitv. A. C. 52-66 "1 Ky" High Intensity. D. C. 40-42 Simplified High Intensity, D. C. with adjustable feed ratio 42-45 Simplified High Intensity, D.C. with fixed feed ratio 42-45 Simplified High Intensity, D. C. 56-65 SIZE AND TYPE 7/mm x 9" H.I., A.C. Carbons in both holders 7/mm x 12" or 14" "Suprex" positive 6/mm x 9" "Orotip" X Negative 7/mm x 12" or 14" "Suprex" Positive 6 mm x 9" "Orotip" X Negative 7/mm x 12" or 14" "Suprex" Positive 7/mm x 9" "Orotip" C Negative 8 mm x 12" or 14" "Suprex" positive 7/mm x 9" "Orotip" C Negative Projection Lamps (44) Carbons are burned in a lamp mechanism which includes optical devices for concentrating the maximum possible light at the projector aperture. In most lamps, these devices are focussed upon the crater of the positive carbon. (45) Because it is necessary to keep the crater of the