We use Optical Character Recognition (OCR) during our scanning and processing workflow to make the content of each page searchable. You can view the automatically generated text below as well as copy and paste individual pieces of text to quote in your own work.
Text recognition is never 100% accurate. Many parts of the scanned page may not be reflected in the OCR text output, including: images, page layout, certain fonts or handwriting.
398 MOTION PICTURE HANDBOOK
through which oil well 10 is filled. It is essential that this plug be in place and screwed tightly home, else the centrifugal action before named will force the oil out and empty the zvell. Plug 12, Plates 1, 2 and 3; is for the purpose of draining oil well 10, and this should be done at regular intervals every thirty days. After draining the oil well, insert plug 12 and fill the well with kerosense, start the machine and let it run for say two minutes, after which drain all the kerosense out, replace plug 12 and fill the well up to within one-quarter inch of the top of the passage stopped by plug 13.
As the quality of oil to be used, see General Instruction No. 3, but:
Caution. — Never, under any circumstances, use the much advertised patent oils, as they almost without exception are worthless for the lubrication of heavy or high speed machinery. The use of such oils will invalidate the manufacturer's guarantee.
On the other, or lower end of the armature shaft, is ball bearing 6, Plate 2, lubrication for which is furnished by grease cup 21, Plates 1 and 2. This grease cup should be kept filled with Alco Grease.
Caution. — It is important that either Alco Grease or a high grade vaseline be used, because of the fact that if a grease containing any acid is used in cup 21, the acid will attack the steel balls, and in course of time destroy their accuracy, thus compelling an unnecessary and somewhat expensive renewal of the bearing.
Armature. — The armature or revolving member of the machine is completely assembled into one solid part, 1 to 6, Plate 2, in which 3 is the upper and 6 the lower bearing. The alternating current rotor, or revolving member, 4, is built up of reannealed electrical sheet steel, properly punched and assembled on armature shaft 9. The rotor bars are driven through the slots a tight fit, the ends electrically welded together into a solid mass of pure copper, which insures perfect contact, low resistance and a uniform torque, or pulling force. Directly above the rotor is fan 5, Plate 2, made of sheet steel blades and a solid ring, the blades riveted and welded together, and finally attached to shaft 9 by means of two heavy set screws. This fan produces a suction through the ventilating openings in castings 18 and 20, drawing cold air over the windings of the A. C. motor. This air is then forced up over this D. C. armature, and out through openings 23, Plate 1.
Part 1, Plate 2, is the D. C. armature, which is mounted directly above fan 5. Armature coils are fixed in place with