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

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 #:
000416
Language:
English
Collection:
Books
Format:
Books
Contributor:
University of California Libraries
Sponsor:
MSN
Coordinator:
Media History Digital Library
Description:
Date Added:
July 19, 2022
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FOR MANAGERS AND OPERATORS 397 the alternating motor, 4, Plate 2, below, fan 5 above rotor 4, and armature 1 with commutator 2, above the fan, the upper end being supported laterally by a ball bearing, construction of which is shown in detail in Plate 3, Brush holders and brushes 17 are shown in Plate 2. Plate 3; Figure 191. The details of upper bearing 3, Plate 2, are shown in Plate 3, in which 4 and 5 are,, respectively, an exterior and interior ball race, separated by steel balls 6, part 5, the interior race being clamped rigidly to shaft 9, by means of nut 2. Part 4 is stationary and sets in a recess in the main frame casting, the whole being covered by cap 1. Part 7 consists of a casting which is clamped between interior ball race 5, and the shoulder, pf shaft 9, so that it must revolve with the shaft at armature speed. This part (7) extends down1 into oil well 10. The oiling action is as follows: Oil well 10 is filled with oil up tp approximately one-quarter inch of the top of the passage containing plug 13. Part 7 revolves at high speed, and, by the centrifugal action thus created the oil is forced up through passage 3-3, whence by gravity it returns again to the well through the bearing, thus flooding balls 6 with a continuous stream of oil. Thirteen, Plates !-•• 2 and 3, is a plug closing the passage