. American engineer and railroad journal . ings, the maximum distance from the cen-ter of spindle to the cross table being 23 ins. and to the longtable 30 ins. This type of machine furnishes the best knownmeans of quickly and accurately boring a number of parallelholes in work without loosening the clamp-bolts from the table. The gap lathe illustrated below is the 28-48-in. exten-sion gap lathe (tool No. 35) built by Edwin Harrington, Son &Co., Philadelphia, Pa., and is driven by a multiple-voltage Crocker-Wheeler motor. The drive is, on this tool ason the boring machine, through two
. American engineer and railroad journal . ings, the maximum distance from the cen-ter of spindle to the cross table being 23 ins. and to the longtable 30 ins. This type of machine furnishes the best knownmeans of quickly and accurately boring a number of parallelholes in work without loosening the clamp-bolts from the table. The gap lathe illustrated below is the 28-48-in. exten-sion gap lathe (tool No. 35) built by Edwin Harrington, Son &Co., Philadelphia, Pa., and is driven by a multiple-voltage Crocker-Wheeler motor. The drive is, on this tool ason the boring machine, through two reductions of gearingwhich has two speed changes by means of slip gears; in thisway the wide range of speed is secured. This gap lathe hasparticular advantages for the repair shop. As an improvementon the ordinary gap lathe, the extension feature permits mak-ing the gap wide or narrow to suit the work; also allows turn-ing a much longer shaft, as the distance between centers maybe doubled by extension of top portion of bed. With ample. 1-;.\)N ^AV LATHE. EDW. HAI!KlNGTO.\, SO.\ & CO. DRIVEN BY A 7^ MULTIPLE-VOLTAGE CROCKER-WHEELER MOTOR. COLLINWOOD SHOPS.—LAKE SHORE ft MICHIGAN SOUTHERN RAILWAY. and rack mounted in bearings and from a crossed belt forthe cutting and an open belt for the return motion by meansof a shaft driven by an electric motor on the arch. The belt-shifter guidete one belt entirely off the pulley before startingthe other on. permits stopping the table instantly from eitherside without stopping the belts, and is arranged to clear thereversing dog, allowing the work to be run from under thetool for inspection. The upper engraving on page 104 illustrates the double-headlocomotive-frame slotting machine (tool No. 14), built byBement, Niles & Co. This tool is driven by a multiple-voltage motor. The drive is a direct-geared reduction drive power to turn up to the full diameter of swing over lower bed,it has capacity for a w
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
