. The street railway review . dired current motors and • ernators and irmers, known as the I . luring eled ilri\ ing ail i with the well-known Christenequipments on i nd we understand that more in highly satisfactory servicebout the v. built a large num i various capacil driving air compressors used in gen< motors for driv- ing machine tools and shafting in its own works. In order tomanufacture ipany has maintained an extensive equipment, particularly suited t the purpose, and some tin decided to greatly increase the companys manufacturingfacilities and to develop a complete lira ical machi
. The street railway review . dired current motors and • ernators and irmers, known as the I . luring eled ilri\ ing ail i with the well-known Christenequipments on i nd we understand that more in highly satisfactory servicebout the v. built a large num i various capacil driving air compressors used in gen< motors for driv- ing machine tools and shafting in its own works. In order tomanufacture ipany has maintained an extensive equipment, particularly suited t the purpose, and some tin decided to greatly increase the companys manufacturingfacilities and to develop a complete lira ical machinery of the highest grad l Ik policy of the Christensen company has always been not toplace any apparatus upon the market until the entire work oldevelopment Iki- Keen satisfactorily completed, andlion and success of the air brake apparatus are largely due tothis policy. Therefore the company lias made no announcementregarding its electrical apparatus until the various lines werecompletely develop I ted. Ilie company is now. I lie field poles are built of laminated sheet steel. The largermachines have four poles, and the smaller sizes arc built withtwo only, thus permitting tlic use of a commutator that can beinsulated fat mote satisfactorily than is possible in small ma-of the usual I- The poles arc bolted to the yoke so that a rigid construction is obtained, and the pole iseasily removable witi irbing the armature. field winding i machine formed curately wound by automatic machinery. Any field coil can beand quickly removed without disturbing the armature by•imply withdrawing the pole as explained above The armaturecore is built up of punched disks of soft sh otted around receive the armature winding. These disks arere annealed and it ftei being punched, before assembling. I lie shape of the punching is such, that when assembled on theSteel shaft openings arc provided for ventilation parallel to theshaft Additional ventilation is secured by the use of radial airducts. The
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Keywords: ., book, bookcentury1800, bookdecade1890, booksubjectstreetrailroads
