. Electric railway gazette . the present conditions. The motor wasbuilt for a normal speed of 560 revolutions per 76 STREET RAILWAY GAZETTE. August 35, 1894. niinute. but it is unable to maiutain more thanabout one-half of this speed, the car traveling atabout 50 mUes per hour : this may, in part, ac-count for the large expenditure of energy neces-sary to run the car. Indicator diagrams takenfrom the engine which the company had in 1S93(100- H. p. New York safety* show that the enginewas working at a very heavy load, but the actualelectrical output it was impossible to learn, the generator is
. Electric railway gazette . the present conditions. The motor wasbuilt for a normal speed of 560 revolutions per 76 STREET RAILWAY GAZETTE. August 35, 1894. niinute. but it is unable to maiutain more thanabout one-half of this speed, the car traveling atabout 50 mUes per hour : this may, in part, ac-count for the large expenditure of energy neces-sary to run the car. Indicator diagrams takenfrom the engine which the company had in 1S93(100- H. p. New York safety* show that the enginewas working at a very heavy load, but the actualelectrical output it was impossible to learn, the generator is operated under conditions similar tothose it is intended to meet in actual practice. Four or more sets of brushes, as may be requh-ed,according to the conditions, are used. Each brushis held in an independent holder ; hence any singlebrush can be raised from the commutator withoutdisturbing the others, and each, having its ownspring, may be perfectly adjusted. The diametri-cally opposite brushes are of the same polarity and. rigidly keyed to a metal spider or sleeve, whichcan be readily slipped on and keyed directly to theengine shaft. All washers used in the construc-tion of armatures are first treated to an annealingprocess peculiar to the company, with the resultthat the armatures when revolving in the mostintense magnetic field will only heat up to a fewdegrees above the surrounding temperature. The winding is of the simplest form. The sim-plicity is particularly noticeable at the end of thearmature, where the wires, instead of being overlapped and bunched together, stand out from thecore and from each other, allowing free circula-tion of air around every conductor. No wireshaving a large difference of potential are adjacentto one another. A feature peculiar to these direct-connectedgenerators is the employment of cast steel in thefield, which increases the efficiency of the gen-erator and is much preferable to cast iron, caststeel giving an extremely powerful magnetic fiel
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Keywords: ., bookcentury1800, bookdecade1890, bookpublishernewyo, bookyear1895
