Motion picture projection : an elementary text book (1928)

Record Details:

Title:
Motion picture projection : an elementary text book
Date:
1928
Publisher:
New York : Technical Book Company
Volume:
Motion picture projection : an elementary text book
Leaf #:
000621
Language:
English
Subjects:
Motion Pictures, Motion Picture Technology
Collection:
Books
Format:
Books
Contributor:
Niles Essanay Silent Film Museum
Sponsor:
Media History Digital Library
Coordinator:
Media History Digital Library
Description:
Date Added:
September 21, 2023
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MOTION PICTURE PROJECTION 615 POWER'S "6B" STAND The stand, which is exactly the same for all "6B" models, is exceptionally substantial and entirely original in design. The "6B" base is made in two sections, the lower part with its four legs of solid construction setting in sockets which can be attached to the floor. The motor drive is solidly bolted to the underside of the lower section and remains horizontal. The upper section carries the mechanism, magazines and lamphouse, and this section is designed to permit tilting in a vertical plane to get the necessary angle from the projection room to screen. By means of heavy bolts passing throughslots, both sections are securely held to give positive rigidity once the proper angle is secured. A very fine and accurate angular adjustment is obtained by means of a worm thread. The adjustment is also very accessible and permits centering of the picture on the screen during operations. This is a highly important feature of "6B" models. The upper magazine is equipped with a newly designed revolving spindle upon which the reel is held by a key. A simple friction device prevents the reel from revolving through its own momentum, thus maintaining an even tension on the film at all times. The double switch box supplied on earlier models of Power's projector has been discontinued. In its place a separate motor switch has been installed which may be controlled from either