Motion picture handbook; a guide for managers and operators of motion picture theatres ([c1916])

Page scan 000534 from Motion picture handbook; a guide for managers and operators of motion picture theatres

Record Details:

Title:
Motion picture handbook; a guide for managers and operators of motion picture theatres
Date:
[c1916]
Publisher:
New York City, The Moving Picture World
Volume:
Motion picture handbook; a guide for managers and operators of motion picture theatres
Leaf #:
000534
Language:
English
Collection:
Books
Format:
Books
Contributor:
University of California Libraries
Sponsor:
MSN
Coordinator:
Media History Digital Library
Date Added:
July 19, 2022
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FOR MANAGERS AND OPERATORS 515 No. 5.) When the sprocket teeth become undercut, that is to say, having a groove worn in the surface presented to the film, the sprocket should be removed and a new one installed, (it is a good plan to have an eccentric bushing, B-132-B, P. 4 and 5, star and spindle, S-299-B, P. 5, and intermittent sprocket, W-131-B, P. 1, already assembled, ready to place in the machine when required) this being done as follows: Loosen the two screws, S-125-B, P. 4, and, grasping intermittent sprocket, pull straight out, thus removing bushing, star, spindle and sprocket from the casing. Next carefully remove sprocket from spindle. To do this first remove taper pin which holds Figure 253. Showing the relation of the parts of the Intermittent movement, a portion of the casing being cut away to show you the parts in place. the sprocket to the shaft, and with a cloth in the left hand grasp star and bushing firmly, while with the right hand you pull the sprocket from its spindle with a twisting motion. Should the sprocket stick you may lay the edges on a vise and with a brass or copper punch gently drive the spindle out. Be very careful, if the sprocket is good, that you do not ruin it in the process, as its rim is thin and easily battered or bent. In installing the new sprocket be very sure that the large diameter of the pinholes in shaft and sprocket are together. To replace parts in the machine, first wipe the bushing and its bearing parts perfectly clean and lubricate with good clean oil. Push the bushing into its bearings until the star is against the cam; turn the fly wheel slowly, at the same time pushing in on the sprocket until pin, P-177-B, P. 5, on cam, C-178-B, P. 5, engages with star slot, when bushing may be pushed home; after which adjust