. Railway mechanical engineer . tted by a belt running directly around the face-plate. A tightener pulley issupplied for this belt and is held up to engagement with thebelt through the medium of a compression spring. Thisdouble belt drive as described performs a valuable functionin tending to eliminate chatter and tool marks on the turnedjournals. Suitable sheet iron or woven guards protect thebelt leading from the motor to the jackshaft, as well as thebelt leading from the jackshaft to the face-plate. A is used to drive from the motor to the jackshaft and a6-in. belt from the jacksh
. Railway mechanical engineer . tted by a belt running directly around the face-plate. A tightener pulley issupplied for this belt and is held up to engagement with thebelt through the medium of a compression spring. Thisdouble belt drive as described performs a valuable functionin tending to eliminate chatter and tool marks on the turnedjournals. Suitable sheet iron or woven guards protect thebelt leading from the motor to the jackshaft, as well as thebelt leading from the jackshaft to the face-plate. A is used to drive from the motor to the jackshaft and a6-in. belt from the jackshaft to the face-plate. The face-plate speeds obtainable are from 20 to 60 The levers for controlling the friction clutch and speedchanges are brought to the front of the machine within easyreach of the operator. The face-plate revolves on a stationaryspindle member, and with this construction the headstockcenter is a dead center. The tailstock is of the type usuallyfurnished on large engine lathes and merely supports the. Rear View Showing Method of Driving work on an adjustable spindle which is arranged to beclamped. The carriage details consist of a large base, located in afixed position between the driving wheels. On this base aremounted two sets of carriage rests and tool slides for turningsimultaneously two inside journals, up to 22 in. long. Thetool rests have power longitudinal feeds and power crossfeed for facing hub liners. For turning outside journals a 591 592 RAILWAY MECHANICAL ENGINEER Vol. 95, No. 9 separate rest is provided which is mounted on a base adjacentto the tailstock. The feed is driven from a gear whose teeth are cut di-rectly in a steel bushing member carried in the gear engages a gear carried on a shaft brought up tothe front of the headstock, and from this shaft, through amedium of bevel gears and a diagonal shaft, feed is trans-mitted through a feed box where feed variation is obtainable,and from the head through a spline shaft
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
