F. H. Richardson's bluebook of projection (1935)

Record Details:

Title:
F. H. Richardson's bluebook of projection
Date:
1935
Publisher:
New York : Quigley Publishing Company, Inc.
Volume:
F. H. Richardson's bluebook of projection
Leaf #:
000286
Language:
English
Subjects:
Motion Pictures, Motion Picture Technology
Collection:
Books
Format:
Books
Contributor:
Media History Digital Library
Sponsor:
{"Media History Digital Library","Jeff Joseph"}
Coordinator:
Media History Digital Library
Description:
Date Added:
June 04, 2024
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CURRENT RECTIFICATION 1. Of what does current rectification consist? 2. What is the prevailing current served to theatres here and in Canada? 3. By what means is current rectified? 4. What purposes do current rectifying devices serve? 5. What is ballast resistance? 6. How much more can generator voltage exceed arc voltage . $* 7. What theatres can use the newer a.c. arcs? ^u/>TV. The Mehcukv Akc REctIFIER, page 277 8. Is the mercury arc rectifier still in use t ^-7 8. is tne mercury are lauuci 3uu m u„. ^-— 9. Name the objections to mercury arc rectifiers^ 10. Name the points in favor of mercury arc rectifiers. 11. Describe the vacuum tube contacts and seals. 12. Through what does the mercury arc rectifier receive its current ? 13. Is it possible to regulate the current flow? 14. How is a mercury arc rectifier put into action U 15 What happens inside the vacuum tube when an electric spark is generated? 16. What do contacts A and Al in Fig. 73 represent? 17. By what process between contacts A and Al in Fig. 73, is direct current produced? 18. Why should mercury arc rectifiers not be placed in the main projection room? 19. Should a spare tube always be carried in stock? 20. What is the regulating reactance? 21. Is it possible to operate two arcs off one recti 22. Are vacuum tubes used to rectify a.c. into d.c. : Vacuum Tube Rectifiers, page 281 23. Are vacuum tubes used to rectify current for projector light sources? 268