. American engineer and railroad journal . s are stalled by these cuts. The motors used mustbe more powerful than required by the rules which weresufBcient only a year or so ago. The re-cently developed methods of hardening steelmake it necessary to begin anew in these e/y/M:/yMM,VM/. .■-/^/^^!^^;^^W\K\^^V^^\V^^^^^ PNEUMATIC FLUE WELDING MACHINE. This interesting machine was developed and patented by A. Fergusson, assistant superintendent of motive power ofthe Chicago Great Western, and is in use at the Oelwein shopsot that road, where it is attracting a great deal of attentionbecause of
. American engineer and railroad journal . s are stalled by these cuts. The motors used mustbe more powerful than required by the rules which weresufBcient only a year or so ago. The re-cently developed methods of hardening steelmake it necessary to begin anew in these e/y/M:/yMM,VM/. .■-/^/^^!^^;^^W\K\^^V^^\V^^^^^ PNEUMATIC FLUE WELDING MACHINE. This interesting machine was developed and patented by A. Fergusson, assistant superintendent of motive power ofthe Chicago Great Western, and is in use at the Oelwein shopsot that road, where it is attracting a great deal of attentionbecause of its remarkable work. The rotating spindle and the large roller are belt-driven,the mechanism being clearly shown in the engraving. Whenthe tube with the safe end upon it is in position for welding,the foot lever is pressed and the upper roller, which is on aroller bearing, is forced downward with a pressure of about1,200 lbs., by means of the air cylinder; the levers, actingthrough the spiral springs, raise the lower and longer rollers. .^KKTCH OF THE MANDREL TJEVICE. FERGUSSONS PNEUMATIC FLUE WELDING MACHINE. three important directions: To increase cutting speeds, pro-vide geater strength and rigidity in machines and supplygreater power to drive them. Blue chips are now found at the large machines in everyshop pretending to be at all up to date, and in a tour ofmany shops recently made by a representative of this jour-nal, Novo steel (Hermann Boker & Co., 101 Duane York) was frequently found and as frequently praisedby those who are using it. The remarks in the first para-graph on page 378 of our December number referred to thissteel, and attempts will be made to secure more reliable datawith regard to it. That paragraph has brought a largeamount of correspondence indicating the vital interest whichis taken in the subject. Additional reports of this steel indi-cate the possibility of speeds of 91 ft. per minute in boringIVIidvale tires with %-in. cuts and %-in. f
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
