. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . A very efficient adjunct which may beapplied to belt or electrically drivenplaners in railroad repair shops has re-cently, been put on the market by theAmerican Tool Works Company of Cin-cinnati, Ohio. It has been called a speedvariator and our illustration, Fig. 1,shows the machine fully equipped, whileFig. 2 shows the top view of the variator. Four speeds are obtained by the use ofa pair of opposed four-step cone pulleysoperated by an endless belt betweenthem, the whole being mounted upon a
. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . A very efficient adjunct which may beapplied to belt or electrically drivenplaners in railroad repair shops has re-cently, been put on the market by theAmerican Tool Works Company of Cin-cinnati, Ohio. It has been called a speedvariator and our illustration, Fig. 1,shows the machine fully equipped, whileFig. 2 shows the top view of the variator. Four speeds are obtained by the use ofa pair of opposed four-step cone pulleysoperated by an endless belt betweenthem, the whole being mounted upon a STEAM-OPERATED CYLINDER FOR SHAKING GRATE. C. & N. W. RY. March, 1911. k\ll.\\ \N WD LOCOMOTIVE ENGINEERING. lib substantial platform on top of the hous-ings. The belt is shifted from step tostep and provides a range of speeds in-tended to fully cover all requiremi tilThis form of drive has two advantages I he I n i i .mi i ve as levi rs to lidithe driven con- towards the driver,thus slackening the belt. This feature,together with the mechanical belt shiftingand the fact that the steps of the. ping, with this drive it is easier tomake the changes while in motion thannot. liming pulleys have flywheel rims, liimi of which reducesminimum all shocks to the driving mcch-due t< i intermitti nt cutting and at11 ring a steady, evenpull at the cutting. can be arranged suita-ble to individual requirements, but areirly furnished to provide 20 ft., 30ft., 40 ft. and 50 ft., with a constant re-turn speed of about 80 ft. Bell drive isregularly furnished by the makers withthis variator, the tight and loose pulleysbeing applied to the rear cone shaft. Thedrive can be obtained direct from a lineshaft, provided it has a sufficient speed,but, slow shafts of about ISO r. p. m.,require an intermediate or jack this construction it is a simple mat-ter to convert the belt drive into a motordrive at any time after the machine isinstalled. FIG. 1. PLANER EQUIPPED WITH THE NEW SPEED i
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