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 #:
000111
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 1035 In Fig. 389 we see the diagrammatic representation of a vacuum tube, with a battery to heat its filament. Also one lead of a 110-volt 60-cycle A. C. power circuit connecting to the same filament. The other power lead connects, through the load, to the plate. Each lead of the A. C. circuit will of course be alternately positive and negative as the current reverses. *iLAMt*K SLOW TV f &tO AA& PLAT£ W/f£# r#CS£ &Am*y 6W.0 1 TO HOV ec cvcce I C* SUPPLY Figure 389. There is a grid in the tube here shown, it being really an amplifying tube, but you will observe that the grid and plate are joined, and the A. C. lead connected to both. It is not necessary that there be any grid at all in a rectifying tube, but if there is one it must be thus