. American engineer and railroad journal . UNIUUE MOTOR APPLICATION TO HIGH-SPEED LATHE. stant speed motor having about 1200 , and of either thedirect or alternating current type, is therefore recommended. Byusing a variable speed motor a great number of speed changesmay be furnished, but ordinarily these are not needed. Where a constant speed motor is applied, as shown in thephotos, the lathe spindle may be started, stopped or reversed,without stopping the motor, by the handle on the spline shaftat the lower right hand corner of the carriage. Time and powerare thus saved over the method
. American engineer and railroad journal . UNIUUE MOTOR APPLICATION TO HIGH-SPEED LATHE. stant speed motor having about 1200 , and of either thedirect or alternating current type, is therefore recommended. Byusing a variable speed motor a great number of speed changesmay be furnished, but ordinarily these are not needed. Where a constant speed motor is applied, as shown in thephotos, the lathe spindle may be started, stopped or reversed,without stopping the motor, by the handle on the spline shaftat the lower right hand corner of the carriage. Time and powerare thus saved over the method commonly used of reversing themotor. Motion is transmitted from the motor to the headstock through. -MOTOR APPLICATION TO HIGH-SPEED LATHE, REAR VIEW. the train of spur gearing and the bevel gears at the top and bot-tom of the vertical shaft at the rear. The direction of the verticalshaft is stopped, or changed, by shifting the two bevel gears onthe horizontal shaft, which engage with the one at the lowerend of the vertical shaft. These gears are controlled from thehandle on the spline shaft at the front of the machine. In cutting threads it is much easier to cut to a shoulder withthis arrangement, as the controlling lever needs to be movedonly two or three inches and works more easily than the reversi-ble controller on a motor. FORGED STEEL HYDRAULIC JACKS. i lie latest development in the hydraulic jack field is a designforged entirely out of open hearth, fluid compressed steel whichis being put on the market by the Duff Manufacturing Company,Pittsburgh. The patents covering the special features and con-struction are held by the Bethlehem Steel Co. who designed andperfected it and
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
