File:The street railway review (1891) (14781234263).jpg

Identifier: streetrailwayrev01amer (find matches)
Title: The street railway review
Year: 1891 (1890s)
Authors: American Street Railway Association Street Railway Accountants' Association of America American Railway, Mechanical, and Electrical Association
Subjects: Street-railroads
Publisher: Chicago : Street Railway Review Pub. Co
Contributing Library: Carnegie Library of Pittsburgh
Digitizing Sponsor: Lyrasis Members and Sloan Foundation

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erevolves at 94 revolutions per minute, turning a36-inch wheel. The equivalent speed of thesingle reduction motor is about 400 and of thedouble reduction 800 revolutions per minute. As a result of several thousand readings takenon Cleveland lines, the following average electricaloutput has been noted: Average volts, 480;amperes, 24; E. H. P., 15.44; passengers, 48. Figure 2 shows the Short Double Reductionor Geared Motor, which is already familiar toevery reader of the Review. This motor wasthe first put out by the Short Companj-, and in itwere developed the characteristics which are nowalwajs associated with Short electrical machinesFor instance, the ring armature, multiple fields,large size commutator and such an arrangementof parts as admits of their perfect ventilation. This andthe Water Tight are the only motors on the markethaving wooden web gearing, by means of which theperfect insulation of the motor from its frame and truckhave been secured. The pinions are of solid steel, of
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5IIOKT DOLLLt KUlLLllUN M HlK large diameter and with large teeth. The rim of thewooden web gear is of cast steel. The motor frame inthis, as in the other two forms of motor, is in one pieceand is held by flexible supports. The Short Company has made no mistake in callingthis motor its Standard motor, the advent of theGearless motor with its obvious improvements nothaving lessened in any way the popularit) of the Stan-dard equipment. The Single Reduction or Water Tight motor isshown in figure 3. One pinion and one gear have been 457 dispensed witli and arrangements made to run the remain-ing gear in oil. The machines are practically the same,and a series of efficiency tests show that in economy ofcurrent and output of power, there is little choice betweenthem. The W. T. motor, however, is smaller than the Standard motor and it is claimed is the lightest andsmallest street car motor thus far constructed. It weighssomething less than i,8oo pounds. It is encased in andentirely protected

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