Richardson's handbook of projection (1930)

Record Details:

Title:
Richardson's handbook of projection
Date:
1930
Publisher:
New York : Chalmers Publishing Company
Volume:
Richardson's handbook of projection
Leaf #:
000221
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 01, 2024
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MANAGERS AND PROJECTIONISTS 1145 KEEP EVERYTHING CLEAN. Projectionists are warned that oil, dirt and sound reproduction arc implacable enemies. Everything in the exciting lamp and sound gate compartments must be kept scrupulously clean. Oil, dust or dirt in these compartments, or anywhere else about sound reproducing equipment, literally shout to Heaven of a careless, and therefore to that extent, inefficient projectionist. See page 1003. PHOTO-ELECTRIC CELL.— After passing through the film sound track, the light beam passes on and into the photo-electric cell, the action of which is described IZ to I ZooV.DC — o o TO FADER. PRI. S£Q Figure 415. Showing the General Hook-up of Photo-Electric Cell. in detail under the title "Photo-Electric Cell," page 1013. There is, however, some slight difference in the interior light-sensitive coating of the one there described and the one used by RCA Photophone. Results are, however, generally speaking, identical. The interior coating of the one used with RCA is caesium upon silver, instead of metal potassium upon silver as in the other tube. In the