Science and Industry, Հատոր 7Colliery Engineer Company, 1902 |
From inside the book
Արդյունքներ 100–ի 1-ից 5-ը:
Էջ 25
... space , with a clear space over head , not obstrueing the light , and allowing the use of cranes for handling the work , it will be found preferable to any other means of apply- ing a motor . If the conditions will not permit the motor ...
... space , with a clear space over head , not obstrueing the light , and allowing the use of cranes for handling the work , it will be found preferable to any other means of apply- ing a motor . If the conditions will not permit the motor ...
Էջ 48
... space with iron rust . There are several formulas for the cement , all of which have given good service . The following is one of the simplest and best of these : Mix 2 ounces of sal amoniac with 5 lb. of cast - iron borings , and make ...
... space with iron rust . There are several formulas for the cement , all of which have given good service . The following is one of the simplest and best of these : Mix 2 ounces of sal amoniac with 5 lb. of cast - iron borings , and make ...
Էջ 52
... space than we can spare in these columns , but you will find a good description in " Thomson's Elementary Les- sons in Electricity and Magnetism , " which you can obtain in almost any public library . ( b ) We have not seen any ...
... space than we can spare in these columns , but you will find a good description in " Thomson's Elementary Les- sons in Electricity and Magnetism , " which you can obtain in almost any public library . ( b ) We have not seen any ...
Էջ 64
... space here . A cer- tain amount of experience is necessary in any case , but it is hoped that these statements regarding engine testing have brought some new ideas to the student , and have reminded the steam engineer of a few things he ...
... space here . A cer- tain amount of experience is necessary in any case , but it is hoped that these statements regarding engine testing have brought some new ideas to the student , and have reminded the steam engineer of a few things he ...
Էջ 66
... space , any such attempt would be likely to result in a waste of fuel and the delivery of steam loaded to a greater ... space for the cir- culation of the water next to the shell of the boiler with a 2 - inch vertical space between the ...
... space , any such attempt would be likely to result in a waste of fuel and the delivery of steam loaded to a greater ... space for the cir- culation of the water next to the shell of the boiler with a 2 - inch vertical space between the ...
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Common terms and phrases
alternating current amount ampere-turns amperes angle armature battery belt binding post boiler brass carbon cent circuit circular mils coal coil condenser connected copper crosshead cut-off cylinder diagram diameter direct current direction distance dynamo efficiency electric electromotive force engine equal feedwater feet field fire flow force formula friction fuel furnace give given grate heater heating surface holes horsepower increase iron joint lamp length load machine machinery magnetic mean effective pressure means mechanical metal method motor necessary number of turns obtained ohms operation pipe piston plant plates pounds practical pressure pulley pump resistance revolutions per minute rheostat SCIENCE AND INDUSTRY Scranton shaft shown in Fig shunt side speed square inch steam steam engine steel stroke superheated switch tank temperature tion tubes turbine valve voltage voltmeter volts weight wheel winding wire
Սիրված հատվածներ
Էջ 632 - AH a unit of resistance, the international ohm, which is based upon the ohm equal to 109 units of resistance of the CGS system of electromagnetic units, and is represented by the resistance offered to an unvarying electric current by a column of mercury at the temperature of melting ice, 14.4521 grams in mass, of a constant cross-sectional area and of the length of 106.3 centimetres.
Էջ 455 - Every body continues in its state of rest or of uniform motion in a straight line, except in so far as it is compelled by force to change that state.
Էջ 512 - Every body continues in its state of rest, or of uniform motion in a straight line, unless it is compelled to change that state by forces impressed upon it.
Էջ 258 - Bushings must be long enough to bush the entire length of the hole in one continuous piece, or else the hole must first be bushed by a continuous waterproof tube.
Էջ 240 - In the history of mechanical art two modes of progress may be distinguished — the empirical and the scientific. Not the practical and the theoretic, for that distinction is fallacious : all real progress in mechanical art, whether theoretical or not, must be practical. The true distinction is this : that the empirical mode of progress is purely and simply practical ; the scientific mode of progress ia at once practical and theoretic.
Էջ 258 - Must be placed on all service wires, either overhead or underground, as near as possible to the point where they enter the building and inside the walls, and arranged to cut off the entire current from the building.
Էջ 141 - L = length of stroke, in feet; A = area of piston, in square inches; N = number of strokes per minute = number of revolutions x 2. PLAN " " " 33,000 ' The derivation of this formula is explained, as follows: The area of the piston, in square inches, multiplied by the mean effective pressure, in pounds per square inch, gives the total force acting on the piston, in pounds.
Էջ 258 - No. 51.) a. Must be placed on all service wires, either overhead or underground in a readily accessible place, as near as possible to the point where the wires enter the building, and arranged to cut off the entire current.
Էջ 258 - In all wiring special attention must be paid to the mechanical execution of the work. Careful and neat running, connecting, soldering, taping of conductors and securing and attaching of fittings, are specially conducive to security and efficiency, and will be strongly insisted on.