. American engineer and railroad journal . ofgears or mechanism by careless handling of the heads. The machine is most thoroughly provided with informationreadings for the operator. An accurately graduated scale isattached to the main turret slide, and a similar scale is madepart of the cross rail face. A seal; is also attached 10 the toolslide of the side head; these scales proving of material as-sstance in the setting of tools. Index dials accuratelv gradu- 233 AMERICAN ENGINEER AND RAILROAD JOURNAL June, 1911. ated in thoiisancltli? of an inch pre mounted on the feed rods ofboth main and si
. American engineer and railroad journal . ofgears or mechanism by careless handling of the heads. The machine is most thoroughly provided with informationreadings for the operator. An accurately graduated scale isattached to the main turret slide, and a similar scale is madepart of the cross rail face. A seal; is also attached 10 the toolslide of the side head; these scales proving of material as-sstance in the setting of tools. Index dials accuratelv gradu- 233 AMERICAN ENGINEER AND RAILROAD JOURNAL June, 1911. ated in thoiisancltli? of an inch pre mounted on the feed rods ofboth main and side heads. These dials, being of large diame-ter, have the graduations widely spaced and hence arc excep-tionally distinct and readable. Observation stops, bearing numbers to correspond witli thoseon the faces of the turrets, are adjustably mounted on gradu-ated scales and micrometer dials, and are invaluable m the du-plication of various sizes. They do not present the limitationsand objectionable feature?, mechanicrl and otherwise, of the. IIICROMEIER DI.^LS .\.ND ODSEKV.\TI0N STOPS. automatic feed trip, which can be set for one dimension only,and is undependable for accurate reproduction. An original conception which has been worked out in a thoroughly practical manner may be found in the sulistitution ofhand wheels for crank handles on the rod and screw of themain head. These parts of course, revolve rapidly when poweitraverse mechanism is engaged, and crank handles would bedangerous. The hand wheels which are mounted on sleevessecured to the rod and screw are free to make a partial revo-lution on the sleeves before becoming engaged therewith, theengagement imparting a hammer action similar to a hand tap onthe end of a crank handle. The arrangement of this part per-mits of the very finest tool adjustment. The particularly appealing feature in this design is the con-tinuous flow system of lubrication which is incorporated in theBullard vertical turret lathes. Through it the po
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
