Transactions of the American Institute of Electrical Engineers, Band 28American Institute of Electrical Engineers., 1909 "Index of current electrical literature" Dec. 1887-1890 appended tov. 5-7. |
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Seite 19
... cent load and 35 per cent of full load in kilovolts , the latter point corresponding to the greatest separation of primary and secondary coils as provided for in the construction of the transformer tested . Even at short - circuit the ...
... cent load and 35 per cent of full load in kilovolts , the latter point corresponding to the greatest separation of primary and secondary coils as provided for in the construction of the transformer tested . Even at short - circuit the ...
Seite 20
... cent and the efficiency is about 90 per cent . Increase of the power - factor would probably result in instability of current . Before closing , the conditions governing the stability of an arc or arcs in branches from constant ...
... cent and the efficiency is about 90 per cent . Increase of the power - factor would probably result in instability of current . Before closing , the conditions governing the stability of an arc or arcs in branches from constant ...
Seite 30
... cent 11 ° cent 30 ° cent Material of pole shoe .... Cast iron Laminated Cast iron Closed copper band on fields . Yes No No Pounds of copper per kw . output . 53.7 29.5 26.2 Efficiency full load . 70.5 88.0 85.4 For stability of ...
... cent 11 ° cent 30 ° cent Material of pole shoe .... Cast iron Laminated Cast iron Closed copper band on fields . Yes No No Pounds of copper per kw . output . 53.7 29.5 26.2 Efficiency full load . 70.5 88.0 85.4 For stability of ...
Seite 32
... cent or 300 volts . I also conducted further experiments , displacing the pole shoes somewhat , about 2 in . , from the center of the magnet cores . I found on these machines that a change in the direction of rotation would give an ...
... cent or 300 volts . I also conducted further experiments , displacing the pole shoes somewhat , about 2 in . , from the center of the magnet cores . I found on these machines that a change in the direction of rotation would give an ...
Seite 43
... cent , 62 per cent and 88 per cent of synchronism respectively . Of these , the intermediate speed b , is unstable , and so is the entire range of the motor curve be- tween the points of contact n and m of the two tangents from p on ...
... cent , 62 per cent and 88 per cent of synchronism respectively . Of these , the intermediate speed b , is unstable , and so is the entire range of the motor curve be- tween the points of contact n and m of the two tangents from p on ...
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abwatts abwatts per cm alternating alternating current alternating-current amperes apparatus approximately armature brushes capacity Carnot cycle circuit coal coils commutator condenser connected constant copper copper loss core loss cost curve cycles cylinder degrees cent diagram diameter direct current direct-current effect efficiency electromotive force energy field flux density form-factor frequency give heat high-tension hysteresis increase induction motor industrial installed insulation invention inventor iron lamps leakage linear load machine manufacturing maximum mechanical method mill obtained operation outdoor output paper patent system phase plant power-factor practical pressure reactance regulation repulsion motor resistance rotor secondary short-circuit shown in Fig shows shunt single-phase station stator steam steel Steinmetz switches synchronous speed temperature terminal thermodynamic efficiency three-phase tion torque transformer transmission line unbalance unbalancing velocity voltage voltmeter volts water-power wattmeter winding wire Y Y axis
Beliebte Passagen
Seite 343 - As to the suggestion that competitors were excluded from the use of the new patent, we answer that such exclusion may be said to have been of the very essence of the right conferred by the patent, as it is the privilege of any owner of property to use or not to use it, without question of motive.
Seite 564 - The torque of an induction motor varies as the square of the applied voltage and of a synchronous reluctance motor as approximately the 2 1/2 power of the voltage.
Seite 318 - ... made of the sole working or making of any manner of new manufactures within this realm, to the true and first inventor and inventors of such manufactures, which others at the time of making such letters patent and grants shall not use, so as also they be not contrary to the law, nor mischievous to the State by raising of prices of commodities at home, or hurt of trade, or generally inconvenient...
Seite 317 - I will show you how the judges have heretofore allowed uf monopoly patents — which is that when any man by his own energy and industry or by his own charge and industry, or by his own wit or invention doth bring any new trade into the realm, or any engine tending to the furtherance of a trade . . . that never was used before, and that for the good of the realm...
Seite 175 - concurrent development of the streams and their sources for every useful purpose to which they may be put," as it is stated in the "declaration of principles" of the recent North American Conservation Conference, all engineers will agree that each stream should be studied with reference to its possibilities "for domestic and municipal supply, irrigation, navigation, and power, as interrelated public uses." But the development of a plan economically sound calls for unbiased consideration and fairly...
Seite 343 - And another fact may be mentioned. In some foreign countries the right granted to an inventor is affected by non-use. This policy, we must assume, Congress has not been ignorant of nor of its effects. It has, nevertheless, selected another policy; it has continued that policy through many years. We may assume that experience has demonstrated its wisdom and beneficial effect upon the arts and sciences. From the character of the right of the patentee we may judge of his remedies.
Seite 166 - Putnam, of New York, and the results set forth in an interesting paper on " Conservation of Power Resources,"* presented by him at the conference on the Conservation of Natural Resources, held at the White House, May 13-15, 1908.
Seite 173 - The paramount use should be that of water supply; next should follow navigation in humid regions and irrigation in arid regions. The development of power on the navigable and source streams should be kept subordinate to the primary and secondary uses of the waters; though other things equal, the development of power should be encouraged, not only to reduce the drain on other resources, but because properly designed reservoirs and power plants retard the run-off and so aid in the control of the streams...
Seite 319 - to promote the progress of science and the useful arts, by securing for limited times, to authors and inventors, the exclusive right to their respective writings and discoveries...
Seite 88 - Explain why the specific heat of a gas at constant pressure is greater than the specific heat at constant volume.