Practical cinematography and its applications (1913)

Page scan 000270 from Practical cinematography and its applications

Record Details:

Title:
Practical cinematography and its applications
Date:
1913
Publisher:
Philadelphia, Lippincott
Volume:
Practical cinematography and its applications
Leaf #:
000270
Language:
English
Collection:
Books
Format:
Books
Contributor:
Gerstein - University of Toronto
Sponsor:
MSN
Coordinator:
Media History Digital Library
Description:
14
Date Added:
July 19, 2022
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MILITARY VALUE 205 sheets disturbs the line of holes caused by the shot, and through which the back light was shining, so that the spot of light is extinguished, and an opaque screen is presented. The inclusion of the third or back paper not only serves as a stiffener, but also acts as a means of lessening the possibility of a repeat, especially as it is moved gradually and at long intervals in a transverse direction. The movement of the travelling surfaces of paper is extremely small, approximately the diameter of a shot-hole, so that the consumption of paper is very low. When the first roller has been exhausted it is only necessary to replace it by the roller on which the paper has been rewound, and the paper can be used over again. The possibility of three old shot-holes coming once more into line without a shot being fired is so extremely remote as not to be worth consideration. From this it will be seen that the final stage in the cycle of movements arising from the action of the rifle report upon the microphone, and the relay, is the movement of the paper forming the screen or target. The time during which the pic- ture remains stationary may be varied within certain limits, but normally it is about a couple of seconds. When the paper has moved, obliterating the shot-hole, the brake on the projector is released, the magnetic clutch re-engages, and the film