Wire in Electrical Construction |
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Page 14
... less than 10 centimeters in diameter and from 4 to 5 centimeters in depth . The anode should be a plate of pure silver , some 30 square centi- meters in area and 2 or 3 millimeters in thickness . This is supported horizontally in the ...
... less than 10 centimeters in diameter and from 4 to 5 centimeters in depth . The anode should be a plate of pure silver , some 30 square centi- meters in area and 2 or 3 millimeters in thickness . This is supported horizontally in the ...
Page 15
... less than 10 ohms . 2. A committee , consisting of Messrs . Helmholtz , Ayrton and Car- hart , was appointed to prepare specifications for the Clark's cell . Their report has not yet been received . IN COPPER WIRE . IN THE following ...
... less than 10 ohms . 2. A committee , consisting of Messrs . Helmholtz , Ayrton and Car- hart , was appointed to prepare specifications for the Clark's cell . Their report has not yet been received . IN COPPER WIRE . IN THE following ...
Page 16
... less than that found in actual weights of drawn wire . In computing the weights , the specific gravity of copper is taken at 8.89 , water being at its greatest density 62.425 pounds per cubic foot . International ohms are used , unless ...
... less than that found in actual weights of drawn wire . In computing the weights , the specific gravity of copper is taken at 8.89 , water being at its greatest density 62.425 pounds per cubic foot . International ohms are used , unless ...
Page 36
... less strain than two and one- half times its weight in pounds per mile . " 3. Tests for ductility will be made as follows : The piece of wire will be gripped by two vises , 6 inches apart , and twisted . The full number of twists must ...
... less strain than two and one- half times its weight in pounds per mile . " 3. Tests for ductility will be made as follows : The piece of wire will be gripped by two vises , 6 inches apart , and twisted . The full number of twists must ...
Page 37
... less than Twists in six inches . Breaking weight . Not less than Twists in six inches . of standard size at Resistance per mile 60 ° F. Interna- tional ohms . N. B. S. G. Numbers , FUSING EFFECTS OF CURRENTS JOHN A. ROEBLING'S SONS CO ...
... less than Twists in six inches . Breaking weight . Not less than Twists in six inches . of standard size at Resistance per mile 60 ° F. Interna- tional ohms . N. B. S. G. Numbers , FUSING EFFECTS OF CURRENTS JOHN A. ROEBLING'S SONS CO ...
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Common terms and phrases
anode B. A. units Breaking weight British standard British thermal unit C. G. S. system Centigrade centum Circular mils coefficient conductor copper COPPER WIRE COPPER WIRE.-(Cont core Cubic centimeters cubic foot Deflections in decimal degree Centigrade Diameters in mils Diameters of wires electrical electro-motive force Fahrenheit feet in International Fluid ounce formulæ galvanized strand German silver grams HARD-DRAWN COPPER INSULATION RESISTANCE international ampere International ohms Joule Kilograms Legal ohms Long tons Magnet wire Matthiessen MEASURES mercury at 32 meter-gram metric system mil-foot Mile-ohm at 60 Names of units Numbers of wires Office wire Ounces avoirdupois Platinum Pounds on square pounds per square PROPERTIES OF COPPER resistance per mile rise in temperature rubber wire S. G. Insulated Sharpe gauge silver voltameter Spans in feet specific gravity square inch Square millimeters Square mils temperature coëfficient tional ohms triple braid watt weight per foot Weights per mile WIRE GAUGES wires in strands
Popular passages
Page 14 - As a unit of resistance, the international ohm, which is based upon the ohm equal to 10° 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 crosssectional area and of the length of 106.3 cmsAmpere.
Page 15 - As a unit of quantity, the international coulomb, which is the quantity of electricity transferred by a current of one international ampere in one second. As a unit of capacity, the international farad, which is the capacity of a condenser charged to a potential of one international volt by one international coulomb of electricity. As a unit of work, the joule, which is equal to 10...
Page 14 - As a unit of current, the international ampere, which is onetenth of the unit of current of the CGS system of electromagnetic units, and which is represented sufficiently well for practical use by the unvarying current which, when passed through a solution of nitrate of silver in water, and in accordance with accompanying specifications deposits silver at the rate of Q.001118 of a gram per second.
Page 15 - The liquid should consist of a neutral solution of pure silver nitrate, containing about 15 parts by weight of the nitrate to 85 parts of water. The resistance of the voltameter changes somewhat as the current passes. To prevent these changes having too great an effect on the current, some resistance besides that of the voltameter should be inserted in the circuit.
Page 15 - ... As a unit of electromotive force, the international volt, which is the electromotive force that, steadily applied to a conductor whose resistance is one international ohm, will produce a current of one international ampere, and which is represented sufficiently well for practical use by \\\% of the electromotive force between the poles or electrodes of the voltaic cell known as Clark's cell, at a temperature of 15° C., and prepared in the manner described in the accompanying specification...
Page 36 - Ibs. each. 7. The wire must be well galvanized and capable of standing the following test : The wire will be plunged into a saturated solution of sulphate of copper, and permitted to remain one minute, and then wiped clean. This process will be performed four times. If the wire appears black after the fourth immersion, it shows that the...
Page 15 - IOT units of work in the cgs system, and which is represented sufficiently well for practical use by the energy expended in one second by an international ampere in an international ohm. " As a unit of power, the watt, which is equal to 10...
Page 15 - As a unit of electromotive force, the international volt, which is the electromotive force that, steadily applied to a conductor whose resistance is one international ohm, will produce a current of one international ampere, and which is represented sufficiently well for practical use by ^2.
Page 14 - In the following specification the term silver voltameter means the arrangement of apparatus by means of which an electric current is passed through a solution of nitrate of silver in water. The silver voltameter measures the total electrical quantity which has passed during the time of the experiment, and by noting this time the time average of the current, or, if the current has been kept constant, the current itself can be deduced.
Page 15 - Henry, which is the induction in a circuit when the electro-motive force induced in this circuit is one international volt while the inducing current varies at the rate of one Ampere per second.