Richardson's handbook of projection (1927)

Page scan 000419 from Richardson's handbook of projection

Record Details:

Title:
Richardson's handbook of projection
Date:
1927
Publisher:
New York : Chalmers Publishing Company
Volume:
Richardson's handbook of projection
Leaf #:
000419
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:
August 01, 2024
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MANAGERS AND PROJECTIONISTS 867 KLABE. JWT Figure 315P mirror by means of adjusting screw G, figure 315P, so that the clamp, or carbon holder, is exactly centrally located in the hole in the mirror. It is essential to good results that this adjustment be made accurately, and you may best do it by making a small mark or point exactly in the center of the tip of an unburned carbon, clamping the carbon in the holder and so adjusting the carbon holder backward and forward, that the tip of the carbon is flush with the surface of the mirror. By using an ordinary carpenter's divider, or draughtman's compass, you may, by setting one point on the mark you have made in the center of the carbon tip, and scribing the edge of the hole in the mirror with the other, make the adjustment accurately. NOTE. — It will be well to retain the carbon you have used for this adjustment so that, with small trouble, you may make an occasional test of the centering. Next turn handle I, figure 315P, until the mirror is approximately in the center of the carriage casting. By means of handle K, figure 315P, raise or lower the entire lamp until the distance from the base upon which the projector mechanism rests, to the projector mechanism aperture, is the same as the