Modern Engineering Practice: A Reference Library..., Volume 9American School of Correspondence, 1906 - Engineering |
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angle arms bearing belt bending Bessemer process bevel blast blast furnace block bolts bottom brass calculation carbon cast iron cent clamped cope copper core box core prints cupola cylinder drag drawing edge Engineering equation face fiber stress finished flange flask force foundry friction furnace gear glue glued green sand heat holes illustrated in Fig inside joint ladle lathe load loam machine machinery manganese Mechanical melted metal method mold molding sand mould phosphorus piece pig iron pins pitch plane plate pounds pouring pressure proportions pulley rammed removed reverberatory furnace revolutions per minute runner screw shaft shape shearing shearing stress shellac shown in Fig shrinkage side silicon slag spur gears steam steel strength surface taper teeth tension thickness thin thread tool tooth turned vent width wood worm worm gear wrought iron zinc
Popular passages
Page 140 - ... it would be out of place here to enter into a discussion of the relative merits of the single curve, double curve, or other form of tooth.
Page 7 - WILLIAM JOHN MACQUORN RANKINE, LL. D., FRSS Civil Engineer; Late Regius Professor of Civil Engineering and Mechanics in University of Glasgow, etc. Author of "Applied Mechanics," "The Steam Engine.*' "Civil Engineering," "Useful Rules and Tables," "Machinery and Mill Work,
Page 159 - Whatever is invented has yet to be designed. An invention is of little value until it has been refined by the process of design. Original design is of an inventive nature, but is not strictly invention. Invention is usually considered as the result of genius, and is announced in a flash of brilliancy. We see only the flash, but behind the flash is a long course of the most concentrated brain effort. Inventions are not spontaneous, are not thrown off like sparks from the blacksmith's anvil, but are...
Page 246 - The intensity of crushing on the metal in front of the key, due to force P,, depends upon the thickness of the key, and is properly discussed later under "Keys." PRACTICAL MODIFICATION— Pulley Rim. The theoretical calculation for the thickness of the rim may give a thickness that could not be cast in the foundry, and the section in that case will have to be increased. As light a section as can be readily cast will usually be found abundantly strong for the forces it has to resist. A minimum thickness...
Page 166 - Design as the other three points which have been discussed. The mere act of putting the results of mechanical thinking on paper is one of the greatest helps to force thinking machinery to systematic and definite action. A designer never thinks very long without 'drawing something, and the student must bring himself to / -feel that a drawing in its first sense is a means of helping his own thought, and must freely use it as such. In its second and final sense, the drawing is an order and specification...
Page 242 - As far as the theory of the rim is concerned, its proportion probably depends more upon the calculation for centrifugal force than upon anything else. In order to separate this action from that of any other forces, let us suppose that the rim is entirely free from the arms and hub, and is rotating about its center. Every particle, by centrifugal force, tends to fly radially outward from the center. This condition is represented in Fig. 19. The tendency with which one-half of the rim tends to fly...
Page 7 - WILLIAM RIPPER. Professor of Mechanical Engineering in the Sheffield Technical School: Member of the Institute of Mechanical Engineers. Author of "Machine Drawing and Design," "Practical Chemistry," "Steam," etc. V* JOSHUA ROSE, ME Author of "Mechanical Drawing Self Taught," "Modern Steam Engineering,
Page 158 - Production. From this point of view, Machine Design is the practical, marketable development of mechanical ideas. Viewed thus, the theoretical, skeleton design must be so clothed and shaped that its production may be cheap, involving simple and efficient processes of manufacture. It must be judged by the latest shop methods for exact and maximum output. It must possess all the good points of its competitor, and, withal, some novel and valuable ones of its own. In these days of keen competition it...
Page 311 - ... more easily than a straight pin, it not being necessary to match the hole in hub and shaft so exactly in order that the pin may enter. The taper pin will draw the holes into line as it is driven, and can be backed out readily in removal. Keys of the rectangular form are either straight or tapered, but for different reasons from those just stated for pins. Straight keys have working bearing only at the sides, driving purely by shear...
Page 349 - ... converted" into steel. There are several forms of converters. Fig. 5 shows a concentric converter. It is round, with a detachable flat bottom. The outer casing is of sheet iron. It is filled and emptied at the nose A. The current of cold air enters through the pipe C, and passes through the trunnion T. It enters the converter from the wind-box B, passing through the tuyeres F. The tuyeres are of fire brick 24 to 28 inches long, and have 19 holes -^ inch in diameter, or 7 holes | inch in diameter.