. Railway mechanical engineer . s can be turned simultaneously. The swivel block is accurately graduated to facilitateangular .settings and clamped firmly in the selected position\iv two heavy T slot bolts. The feed is through a pair ofmiter gears to the feed rack. Aside from this swivel featurethe universal attachment and tool blocks are identical withthe plain attachment. Variations in feed for turning and facing slides are ob-tained by loose change gears applied to the feed bracket andworm box. The feeds read in thousandths per revolution ofspindle, and a simple, direct reading shows the ch
. Railway mechanical engineer . s can be turned simultaneously. The swivel block is accurately graduated to facilitateangular .settings and clamped firmly in the selected position\iv two heavy T slot bolts. The feed is through a pair ofmiter gears to the feed rack. Aside from this swivel featurethe universal attachment and tool blocks are identical withthe plain attachment. Variations in feed for turning and facing slides are ob-tained by loose change gears applied to the feed bracket andworm box. The feeds read in thousandths per revolution ofspindle, and a simple, direct reading shows the change gearcombinations and the resulting feeds. Tlie feeds of the front slide are fixed by the changegears used while the feeds of the facing slide may be furthervaried with relation to the feed of the turning slide by theangularity given the swivel guide bar. The feed worm and wheel are on fixed centers and en-lased in an oil tight gear box rigidly bolted to the bed. Thefeeds are tripped to a line by a sensitive acting positive. style B Headstock with Draw-in Attachment jaw clutch heat treated and hardened engaging a similarclutch mounted on the worm wheel. The feed drive is then through changeable gears and apinion and bull wheel to the rack on the carriage. The driveto the facing slide is through similar change gears throughtlie bed to the feed rack on the facing attachment slide onwhich the swivel guide bar is mounted. The feed rack for both carriage and facing attachment isplaced in the center of the slides imparting a feed withoutthe usual binding action occasioned by applying the poweroff the center of the guiding shears. The handwheel at the front of the worm box providesmeans of quickly returning the turning and facing slides tothe starting position after the completion of each cut. The w-orm wheel and clutch are running continuouslyin oil and the thrust of the worm is taken against ballthrust bearings. The taper turning attachment consists of a rigid bracketbolted to t
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
