Servicing projection equipment (1932)

Record Details:

Title:
Servicing projection equipment
Date:
1932
Publisher:
New York : Mancall Publishing Corp.
Volume:
Servicing projection equipment
Leaf #:
000168
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:
August 15, 2024
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152 FORMULAS National Cored and Orotip Projector Combinations (This and subsequent carbon combination tables used through the courtesy of National Carbon Co.) For Direct Current Arc Amperage Size Inches Kind 25 50 Positive 5^x12 National Cored Projector Negative •h x 6 National Orotip Solid or Cored Projector 50 65 Positive 24x12 National Cored Projector Negative iix 6 National Orotip Solid or Cored Projector 65 70 Positive ^xl2 National Cored Projector Negative iix 6 National Orotip Solid or Cored Projector 70-85 Positive Hk12 National Cored Projector Negative ^x 6 National Orotip Solid or Cored Projector 85-120 Positive 1 xl2 National Cored Projector Negative &x 6 National Orotip Cored Projector 120-140 Positive 1^x12 National Cored Projector Negative y2x 6 National Orotip Cored Projector National White Flame A.C. Projector Combinations For Alternating Current Arc Amperage Arc Voltage Diameter Inches Kind 25 40 40 60 60 75 75-100 25-28 28-32 32-35 35-40 H Combination Combination Combination Combination