. Railway mechanical engineer . asured August, 1920 RAILWAY MECHANICAL ENGINEER 553 corre-^pond> uith tlie differenct- between the lengths of thetwo measuring axis. If it varies, the compound slide canbe adjusted until the hair lines cover the second point thatshould have come immediatelv under them if the part hadbeen correct. The micrometer on the compound slideregisters the error. For the checking of gages, master templates, pitch, depthand shape of screw threads the machine illustrated is ex-ceedins^ly accurate. All angles are checked by angularadjustment of the hair lines and irregular
. Railway mechanical engineer . asured August, 1920 RAILWAY MECHANICAL ENGINEER 553 corre-^pond> uith tlie differenct- between the lengths of thetwo measuring axis. If it varies, the compound slide canbe adjusted until the hair lines cover the second point thatshould have come immediatelv under them if the part hadbeen correct. The micrometer on the compound slideregisters the error. For the checking of gages, master templates, pitch, depthand shape of screw threads the machine illustrated is ex-ceedins^ly accurate. All angles are checked by angularadjustment of the hair lines and irregular shapes are checkedl)\ a series of straight line measurements combined whennecessary with adjustments of the hair lines. Turret Tool Post for Engine Lathe ArLRRKl tool post, designed to be used on en-■Jine lathes, has been produced recently by the Love-Jov Tool Company, Inc., Springfield, Vt. It is rigidlyconstructed, convenient in operation and compact enough to on anv lathe having a center height above the tool rest. Lovejoy Turret Tool Post of over 1-j^-in. A positive lock is incorporated in the tur-ret. The turning and facing cutters are adjustable for height asthev l)ecome worn; this feature permits of keeping the cuttingedge on center without sacrificing strength and rigidity. Thetool overhang has been reduced to a minimum. By one movement of the binding lever the operator re-leases, accurately indexes to the next tool post, and againrii;idly clamps the turret to its base, an operation quicklyareomplished by one hand. The turret rings are approxi-mately 4% in. square, made of hardened steel and are in-terchangeable on any base. This feature permits the useof additional rings, carrjing a variety of tool combinationsfor various jobs. One of the rings is provided with boringliars one inch in diameter as shown in the illustration. Theseare entirely free from projections to interfere with chipclearance and will cut to the bottom of a hole slightly largerthan the bar
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
