Machinery's Reference Series ..., Volumes 31-39Industrial Press, 1910 |
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Common terms and phrases
addendum amount armature bars bevel gears blank blister steel blue-print bolts brushes calculations carbon cast iron cent center angle change gears chromium clamp coil commutator crown gear crucible degrees Design dimensions disk Drafting-Room drawing Drill edge feet per minute finish fixture furnace gage given grinder grinding machine grinding wheel hardening heat high-speed steel holder holes ingot insulation Jigs lathe lead lead-screw MACHINERY manufacture metal method micrometer milling milling cutter milling machine molybdenum motor N. Y. Fig nickel nickel-steel number of teeth number of threads obtained operation piece pig iron pinion pipe pitch cone angle pitch cone radius pitch diameter pitch line placed plane plate rolled Rules and Formulas Screw Thread set-over shaft shape short circuit shown in Fig side slots small end spark speed spur gear surface temperature templet thickness Thread Tools threads per inch tool steel vertex width of face wire wrought iron
Popular passages
Page 9 - Gray Pig Iron and Gray Cast Iron. — Pig iron and cast iron in the fracture of which the iron itself is nearly or quite concealed by graphite, so that the fracture has the gray color of graphite.
Page 4 - This type of fan is light in construction, requires but little power at low speeds, and is easily erected. It may be conveniently placed in the attic or upper story of a building, where it may be driven either by a direct or belt-connected electric motor. Fig.
Page 9 - Refined cast iron: Cast iron which has had most of its silicon removed in the refinery furnace, but still contains so much carbon as to be distinctly cast iron.
Page 34 - ... but when tried on harder materials the results obtained were not so efficient. With an increased content of chromium the nature of the steel becomes much harder, and greater cutting efficiency is obtained on hard materials. It was observed that with an increase of chromium there must be a decrease in carbon to obtain the best results for such percentage of chromium. Mention may here be made of an interesting experiment to ascertain what effect would be produced in a rapid steel by substituting...
Page 9 - Ingots and pigs are in a sense castings; the term "steel castings" is used in a more restricted sense, excluding ingots and pigs and including only specially shaped castings, such as are generally used without forging or rolling. They may, however, later be forged...
Page 5 - Circular pitch is the distance from the center of one tooth to the center of the next, measured along the pitch line.
Page 31 - In this table it is assumed that the air enters the heater at a temperature of 10 degrees below zero and passes between the pipes with a velocity of 800 feet per minute. Column 1 gives the number of rows of pipe in the heater and columns 2, 3 and 4 the final temperature of the air for different steam pressures. Columns 5, 6 and 7 give the corresponding efficiency of the heater.
Page 8 - Sometimes the lead of the thread is expressed by a fraction of an inch instead of stating the number of threads per inch. For instance, a thread may be required to be cut having a three-eighths-inch lead. In such a case the expression "three-eighths lead" should first be transformed to "number of threads per inch," after which we can proceed in the same way as has already been explained. To find how many threads per inch there is when the lead is stated, we simply find how many times the lead is...
Page 28 - Tiie efficiency of the heaters used in connection with forced blast varies greatly, depending upon the temperature of the entering air, its velocity between the pipes, the temperature to which it is raised and the steam pressure carried in the heater. The general method in which the heater is made up is also an important factor. In designing a heater of this kind, care must be taken that the free area between the pipes is not contracted to such an extent that an excessive velocity will be required...
Page 3 - Conoidal" fan, is shown in Fig. 143; and a type of "multivane" fan, direct-connected to a steam turbine, is shown in Fig. 144. The discharge opening can be located in any position desired, either up, down, top horizontal, bottom horizontal, or at any angle. Where the height of the fan room is limited, a form called the three-quarter housing may be used, in which the lower part of the casing is replaced by a brick or cemented pit extending below the floorlevel as shown in Fig.