. The carman's helper . ^►edr I*-ms^T*^ Fig. 3—Single Roller Body Side Bearing for Passenger Cars, iron, the rollers being introduced through the top ofthe casing, and are so constructed that the rollers,when free, gravitate to the center. r)y increasing thenumber of rollers, these bearings can be made forany capacity^required, and at the same time sufficienttravel allowed for ordinary working conditions. The xl side bearing illustrated in Fig. 2 is de- 245 THE CARMANS HELPER signed to afford unlimited travel where that is is attached to the truck bolster and has lateral play,which
. The carman's helper . ^►edr I*-ms^T*^ Fig. 3—Single Roller Body Side Bearing for Passenger Cars, iron, the rollers being introduced through the top ofthe casing, and are so constructed that the rollers,when free, gravitate to the center. r)y increasing thenumber of rollers, these bearings can be made forany capacity^required, and at the same time sufficienttravel allowed for ordinary working conditions. The xl side bearing illustrated in Fig. 2 is de- 245 THE CARMANS HELPER signed to afford unlimited travel where that is is attached to the truck bolster and has lateral play,which insures the alignment of the roller for its en-tire width with the opposite bearing. The rollers arehard iron with steel bushing revolving upon steel pins,the whole being carried in malleable iron casings asillustrated. Fig. 3 illustrates a single roller, body side bearingapplied to six wheel arch bar trucks under passenger. Fig, 4_Woods Anti-Friction Center Plates, Body and Truck. equipment, which has been standard upon this classof equipment in the United States and Canada for anumber of years. It is equally important to provide free turningmovement at the center plate, and for this purpose africtionless center bearing has been designed as illus-trated in Fig. 4. The important basic principle in-volved in this center bearing is the sustaining power,largely increased by the use of flat sided balls. The 246 MODERN CAR APPLIANCES AND EQUIPMENT flat sided ball was devised following- an investigationof the, physical properties of balls and plates underload, both below and above the elastic limit; it beingrecognized that stresses in excess of this limit must ul-timately result in impaired efificiency, due to flatteningof balls, indentation of plates or both. Fig 4 shows the Woods anti-friction center plates,both body and truck. The anti-friction elements shown
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectrailroa, bookyear1920
