. The street railway review . gaging in var-ious mercantile enterprises removed to Marion in 18S9 andsoon organized the street raihvav which has been in everyway a success. THE GENERAL ELECTRIC 57 MOTOR. The new G. E. 57 street railway motor has been intro-duced by the company in response to the demand for amotor of greater capacity. It is similar in design to theG. E. 1,000; while still as compact, it has an output of 50h. p. at 500 volts. The frame is dust and waterproof andis of steel, cast in two bowl-shaped pieces with a hand holein the lower half for cleaning. There are four laminatedpol
. The street railway review . gaging in var-ious mercantile enterprises removed to Marion in 18S9 andsoon organized the street raihvav which has been in everyway a success. THE GENERAL ELECTRIC 57 MOTOR. The new G. E. 57 street railway motor has been intro-duced by the company in response to the demand for amotor of greater capacity. It is similar in design to theG. E. 1,000; while still as compact, it has an output of 50h. p. at 500 volts. The frame is dust and waterproof andis of steel, cast in two bowl-shaped pieces with a hand holein the lower half for cleaning. There are four laminatedpoles, each having a separate coil which is wound on a castspool, thoroughly insulated with asbestos. There is a cover- ing of heavy duck drawn over the spool to protect the wind-ing from injury. The armature is similar to that of the G. E. 52 and is 14in. in diameter with a spread of 12 in. It is iron clad, thecore being Iniilt up of annealed laminated disks, and inassemliling tliese, three sets of spacing blocks are used, pro-. GENERAL ELECTRIC 57 RAILWAY MOTOR. viding three ventilating ducts. There are 33 triple coils,each composed of three separate coils, and these are woundwith either two or three turns per coil. The three-turnwinding is the standard for ordinary service. This methodof winding insures few repairs and admits of thoroughinsulation. The armature is as light as possible. The commutator has 99 segments of hard drawn copper2 in. deep, giving a wearing depth of I in. The brush-holders are staggered to prevent the wearing of ridges onthe commutator, and each holder contains two radial brushes,2 ^{ in. long, I 3y{ in. wide and 5/^ in. thick. The bearings are of ample size, the pinion end being
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Keywords: ., book, bookcentury1800, bookdecade1890, booksubjectstreetrailroads
