. Science of railways . The Presto Coupling Nut. This cut shows the Presto Nut with spring and sectionalring removed, ready to be slipped over collar of union sleeve,without having to take down the pipe, melt off the sleeve ornipple, and braze it on again, as has to be done with ordinarynuts. With this nut there is no necessity of an engine havingto be laid off its run, on account of failure of injector couplingsoccurring at a critical time, as with the Presto Nut a newnut can be applied in a moment without the aid of eitherpipeman or coppersmith, and at any place on the road. LOCOMOTIVE APPLI
. Science of railways . The Presto Coupling Nut. This cut shows the Presto Nut with spring and sectionalring removed, ready to be slipped over collar of union sleeve,without having to take down the pipe, melt off the sleeve ornipple, and braze it on again, as has to be done with ordinarynuts. With this nut there is no necessity of an engine havingto be laid off its run, on account of failure of injector couplingsoccurring at a critical time, as with the Presto Nut a newnut can be applied in a moment without the aid of eitherpipeman or coppersmith, and at any place on the road. LOCOMOTIVE APPLIANCES. 637 To put the Presto Nut on piiDe, first remove spring andsectional ring,4Dut nut on backwards over shoulder and sleeveonto pipe; hold bottom of nut up against bottom of pipe whileyou insert one of the sections with square end into groove innut, then slide that section around in groove until it is lyingin bottom of nut. Then hold bottom of nut up against bot-. tom of pipe and insert the other section with square end sothat the two will come together. Slide the second sectionaround in the groove until the two square ends come togetherabout the center of the bottom of the pipe, then hold thebottom of the nut up against the bottom of the pipe, and in-sert the section having both ends beveled and hold it up ingroove of nut while you slip the spring into the groove inring, so that ends of spring will project through notch cutin last section of ring inserted, then slip nut up on sleeve andinto position for coupling, .To take off a Presto Nut over collar or flange of unionsleeve on a pipe, without taking down pipe or having to meltthe sleeve off, back the nut off from sleeve on to pipe, thenturn nut until section of ring having both ends beveled is intop of pipe, press ends of spring together with finger andthumb, and take spring out. Hold bottom of nut up againstbottom of pipe, and then take out the section of ring whichhas both ends beveled, tur
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Keywords: ., bo, bookcentury1900, bookdecade1910, bookidscienceofrailway14kirk
