. American engineer . leges and railroads are much at fault; no doubt allof each are partly at fault. We cannot expect the youngstersto do their best unless we first do our best to give them themost complete opportunities to qualify for advancement; pro-vided, of course, that they are willing to do their best to qualify. Alex. C. Humphreys, President uf Stevens Institute of Technology. TURNING FOUR-BAR CROSSHEAD WRIST PINS St. P.\ul, Minn., October 6, 1913. To THE Editor : In the April, 1913, number of the American Engineer, page192, is shown an arrangement for turning a four-bar guidecrosshea
. American engineer . leges and railroads are much at fault; no doubt allof each are partly at fault. We cannot expect the youngstersto do their best unless we first do our best to give them themost complete opportunities to qualify for advancement; pro-vided, of course, that they are willing to do their best to qualify. Alex. C. Humphreys, President uf Stevens Institute of Technology. TURNING FOUR-BAR CROSSHEAD WRIST PINS St. P.\ul, Minn., October 6, 1913. To THE Editor : In the April, 1913, number of the American Engineer, page192, is shown an arrangement for turning a four-bar guidecrosshead wrist pin. We have an attachment on one of ourlathes in the Chicago, St. Paul, Minneapolis & Omaha shopswhich I believe to be original, and it is positive in its is shown in the illustration. An eccentric is screwed to theheadstock of the lathe which, together with the levers,gives the crosshead the necessary oscillation; the lathe runs asin any other work. In the one in use here the eccentric has a. Apparatus for Turning the Wrist Pins of Four-Bar Crossheads. travel of 8 in., the rest of the apparatus being made to suit thelathe. Our practice is to plane the top and bottom of the pinto size and slot it front and back; we then turn the pin aquarter of a revolution at a time. I have not shown the tools used, which, although they are notexactly the same as those shown in the April number, are sim-ilar and could be used in the same way. Jas. Findlay, Foreman, Construction Shop. New Alloy of Platinum.—A hew hard alloy of platinum issaid to have been produced by the addition of osmium. It isclaimed that this alloy, which contains from to per osmium, has physical and electrical properties fully equal tothe platinum alloy containing a much higher percentage ofiridiurn.—The Mechanical Engineer. Record-Breaking Monoplane Flight.—At Rheims, France,September 29, Maurice Prevost, flying over a circular course,in a monoplane, traversed a distance of 124.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroa, bookyear1912
