New York [etc.] Simmons-Boardman Pub. Co. [etc.] · leaf 103
During a recent visit to one of the principal rail-road shops in the vicinity of Chicago, our attentionwas directed to the simple and ingenious labor sav-ing device shown in the accompanying cut. We re-fer to a continuous feed attachment to the ordinarybolt threading machine, whereby crown bar… … per day. The device illustrated turns out 200 perday very easily and uniformly. The cut almost ex-plains itself. The long feed screw engages with alarge gear wheel at the far end of the machine anda small gear on the main shaft, and the feed screw isrotated. The tabic or slide carrying the bolt…
Railroads · Railroad cars
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