. The Street railway journal . time. To appreciate the conditions of the art at that time, we wouldnote that Field and Edison, in 1883, were operating a locomo-tive with a shunt-wound motor, geared by bevel gearing andbelting, and taking current from an exposed third rail at 75volts. Leo Daft, upon his locomotive Morse, in 1885, on theBaltimore Union Passenger Railway Company, was using acompound-wound 8-hp motor at 125 volts, with exposed thirdrail for conductor. Frank J. Sprague, in 1885, was experi-menting with electric traction on the elevated railways in NewYork, and we would note again t
. The Street railway journal . time. To appreciate the conditions of the art at that time, we wouldnote that Field and Edison, in 1883, were operating a locomo-tive with a shunt-wound motor, geared by bevel gearing andbelting, and taking current from an exposed third rail at 75volts. Leo Daft, upon his locomotive Morse, in 1885, on theBaltimore Union Passenger Railway Company, was using acompound-wound 8-hp motor at 125 volts, with exposed thirdrail for conductor. Frank J. Sprague, in 1885, was experi-menting with electric traction on the elevated railways in NewYork, and we would note again that he was using a shunt-wound motor, with a compound coil at right angles to the field 552 STREET RAILWAY JOURNAL. [Vol. XXIV. No. 15. for neutralizing the armature reaction. Two permanent fea-tures, however, were introduced by Mr. Sprague in these ex-periments in 18S5. One was the flexible suspension of themotor, carrying the weight of the motor directly upon the axleon one side and spring suspended to the truck frame on the. FIG. 2.—SPRAGUE SHUNT-WOUND ELEVATED RAILWAYMOTOR—1885-86 other. The other permanent feature was the introduction ofspur gearing. As a matter of fact, the single-reduction spurgear used in these experiments, as well as upon the laterSprague No. 5, or Richmond motor, in 1888, was premature,and had later to be replaced by double-reduction gearing. To Sidney H. Short should probably be given the credit ofseeing that for motors of the speed common at that day, double-reduction spur gearing should be used. The motor shown inFig. 1 is a motor built by the Brush Electric Company in 1886for Mr. Shorts Denver road, and was in service at least asearly as March, 1887. In 1888 both the Sprague Company on the Richmond road,and the Bentley-Knight Company on the Observatory Hillroad, at Allegheny, are operating motors built especially forrailway work rather than adopting stationary motors for thisservice. While there are certain differences in the design ofthe moto
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
