Automobile Engineering: A General Reference Work, Volume 5

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American Technical Society, 1920 - Automobiles
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Page 116 - These may be checkered to provide a firm grip for heavy work, or may be smooth to avoid marking the surface of the plate operated upon. When holding soft metal, even the smooth steel jaws would mar the surface; and in such cases it is customary to use false jaws of brass or Babbitt metal, or to fasten leather or paper directly to the steel jaws. The screw and handle are made from steel and the nut from malleable iron. The common method of fastening a vise to the bench is by means of the fixed base...
Page 4 - ROBERT H. THURSTON, CE, Ph. B., AM, LL. D. Director of Sibley College. Cornell University. Author of "Manual of the Steam Engine.
Page 166 - ... difference. Hardening Baths. Various baths are used for cooling steel when hardening, on account of the different rates at which they cool the heated metal. An oil bath is used when the steel is wanted tougher and not excessively hard, as the oil cools the steel slower than water. Brine or an acid bath are used when the steel is wanted very hard, as they absorb heat more rapidly than water. For excessively hard work mercury or quicksilver, is sometimes used, as it absorbs the heat very rapidly.
Page 362 - ... is the effect of the clearance volume (ie, the volume occupied by the refrigerant within the compressor that is not displaced by the moving member). This effect is illustrated in the case of the...
Page 355 - A convenient unit of work is the "footpound", which is the work done in lifting a weight of one pound...
Page 139 - ... called the barrel. The measuring screw consists of a fine-pitched screw to fit the nut, combined with a measuring point C, having a face parallel with that of the anvil. Firmly attached to the outer end of this screw, is a thimble D, fitting closely over the barrel; the edge of this thimble is beveled so that graduations placed on the edge come very close to the barrel. A reference line is drawn on the barrel parallel to its axis and graduated to represent the pitch of the screw.
Page 37 - The head of the blowpipe should be inclined at an angle of about 60 degrees to the plane of the weld. The inclination of the head should not be too great, Fig. 20, because the molten metal will be blown ahead of the welding zone and will adhere to the comparatively cold sides of the weld. On the other hand, the welding head...
Page 4 - College, Cornell University Author of "Manual of the Steam Engine," "Manual of Steam Boilers." etc MAX PEMBERTON Motoring Editor. The London Sphere Author of "The Amateur Motorist" HERMAN WL MOEDEBECK Major and Battalions Kommandeur in Badischen Fussartillerie Author of "Pocket-book of Aeronautics" EDWARD F. MILLER Professor of Steam Engineering. Massachusetts Institute of Technology Author of "Steam Boilers
Page 39 - ... of fusion to receive it. If the metal is not hot enough, the added material will simply adhere to the sides, resulting in 'adhesion only, not a true weld. It is, therefore, necessary to produce equal fusion at the edges of the weld with that of the welding rod by the correct motion of the blowpipe. How to Add Welding Rod. When the proper time arrives to add the filling material, the welding rod is lowered into the weld until it is in contact with the molten metal of the edges. When in this position...
Page 38 - ... series of overlapping circles, as shown in Fig. 23. This overlapping extends in the direction of the welding. This motion must be constant and regular in its advance so that the finished weld will have a good appearance. The speed of progress should be such that complete fusion of the three members referred to is secured. The width of this motion is dependent upon the size of the material being welded and varies accordingly with the nature of the work. It does not take much experience to establish...

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