. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . heir uses explained. Such toolsas the modern ones used on engine lathes,tap dies, hand driving and power drivingthread cutting machines, grinding. Hard-ening and tempering will also be dealtwith—in short all that pertains to threadsand thread cutting. (To be continued.) Automatically Held Belt Shifter, andDouble Socket Wrench By W. C. Clark, Pittsburgh, Pa. As is well known, machines frequentlystart of their own volition, thereby spoil-ing work, and sometimes causing acci-dents. In the device
. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . heir uses explained. Such toolsas the modern ones used on engine lathes,tap dies, hand driving and power drivingthread cutting machines, grinding. Hard-ening and tempering will also be dealtwith—in short all that pertains to threadsand thread cutting. (To be continued.) Automatically Held Belt Shifter, andDouble Socket Wrench By W. C. Clark, Pittsburgh, Pa. As is well known, machines frequentlystart of their own volition, thereby spoil-ing work, and sometimes causing acci-dents. In the device shown in the ac-companying illustration it will be observedthat there is a space cut in the rod onwhich the forks are fastened. The lengthof the space is equal to, or a trifle greater. For the most common use it is well tomake the large end to suit a nut the sec-ond size larger than that adapted for thesmall end. For example the 1 in. nut inthe small end would be arranged for \%in. nut in the large end. Thus by makingtwo thin hexagonal shaped liners whichcan be easily inserted in the wrench, we. DETAILS OF AUTOMATICALLY HELD BELT SHIFTER. than the distance the rod moves in shiftingthe belt from the tight to the loose pul-ley. Notches are filed at the end of thiscut out position, and also in the center ifdesired, depending, of course, on the typeof pulley used—reversing or two speedsone way, as the case may be. The arm isfastened to a bracket which supports thepulley and there is enough spring in itthat the point engages the notch when soplaced, thereby preventing the machinefrom starting second reproduced print shows a have a socket wrench that can be used for1% in. nut without using a liner, and 1%in. nut when using the liner on the largeend; while on the small end a 1 in. nutwithout liner would be suitable for a %in nut when using liner. Any similar combination can be workedout, but it is best to skip a size betweenthe different sized ends; for instance,
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectrailroa, bookyear1901
