Electric Railways: A Series of Papers and Discussions Presented at the International Electrical Congress in St. Louis, 1904 (Google eBook)

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McGraw Publishing Company, 1906 - Electric railroads - 447 pages
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Page 15 - Electric operation on tramways having become established, there naturally followed more ambitious attempts in limited applications of electricity to heavier work. In November, 1890, a line on South London road, which was originally designed for cable, was opened, the trains being pulled by electric locomotives equipped with a pair of gearless motors having armatures mounted on the axles of the drivers. In June, 1891, Sprague offered to install on the New. York...
Page 3 - ... the motor was carried longitudinally, motion being transmitted through spur and beveled gears to a central shaft from which connection was made to the wheels. The locomotive drew three small cars having a capacity of about 20 people, and attained the speed of about eight miles an hour.
Page 311 - ... protection of the pipes from power leakage by the shunting. I think this suggestion may throw some light on the subject, although I presume that this phase of the case has been taken into consideration by Mr. Sever and his associates. It has not been referred to in the discussion. Mr. BANCROFT GHERARDI: One of the functions of my department is taking precautions against electrolysis trouble on our cables, and in that connection the bulk of our work has been in Brooklyn, on account of our very...
Page 12 - The controlling system was at first by graded resistances affected by variation of the field coils from series to multiple relations, and series-parallel control of armatures by a separate switch. Motors were run in both directions with fixed brushes, at first laminated ones placed at an angle, and later solid metallic ones with radial bearing.
Page 99 - I believe one of the main advantages of the electric railway over the steam railroad will be lost, and this, therefore, is the feature which has to be kept in view. It means that whatever type of motor may be adopted in inter-urban or suburban service, etc., it must be able to carry the passengers through the cities over existing railways. The existing railways are directcurrent railways, and I believe will remain so. That means that the long-distance motor, at least the suburban and inter-urban...
Page 92 - States the synchronous converter was developed and became a standard piece of apparatus familiar to everybody standard as much as the direct-current generator and the alternating-current generator, and experience with such synchronous converters shows that for electric railway work, for the violently fluctuating loads on the railway system, the synchronous converter is superior even to the direct-current generator: the absence of armature reaction, the phase control of pressure feasible in the...
Page 325 - Nos. 2 and 3 are used occasionally to produce synchronous rotation without direct-current excitation, and of very great steadiness of the rate of rotation, where weight efficiency and power factor are of secondary importance. No. 4 is used to some extent as frequency converter. fore, not limited to a definite synchronous speed. This requires that the rotor when connected to the outside circuit is connected through a commutator, and when closed upon itself several closed circuits exist, displaced...
Page 93 - ... of our large cities, but it found a field of its own, a field which has gradually developed so as to be equal in importance if not superior to the field occupied by the direct current. Hence, to conclude these remarks, what I expect of the alternating-current railway motor is that it will find and develop a field of its own, that field which the directcurrent railway motor cannot reach suburban and inter-urban service, long-distance service, secondary railway service. When considering the...
Page 320 - ... of course, that all the ordinary means of general brake efficiency are contemplated in connection with the brake apparatus. In a paper presented to the American Institute of Electrical Engineers, and published in the January, 1903. volume of proceedings, the writer pointed out the more important features of the brake apparatus for attaining such high efficiency. They included efficient foundation brake-gear automatic slack adjuster, to maintain the minimum piston stroke in the brake cylinders,...
Page 107 - ... instance is purely force, and until the body moves, it does not require power at all. One of the great advantages which the steam-engine has over any electrical system up to the present time, is the fact that when...

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