. Railway mechanical engineer . oughly to consume the oil. The flow of the air throughthe by-pass is controlled by a valve, as is the air and oilmixture. The atomizing valve also is of a distinctive de-sign. It is constructed on the piston valve principle andpermits passing the impurities in the oil through to the com- bustion chamber without danger of clogging the small portable forge is also shown, using tlie same princi-ples of operation as the outfit described above. It is conveni-ently mounted on a strong, wrought iron stand provided withtwo trays; the bottom one may be used as a
. Railway mechanical engineer . oughly to consume the oil. The flow of the air throughthe by-pass is controlled by a valve, as is the air and oilmixture. The atomizing valve also is of a distinctive de-sign. It is constructed on the piston valve principle andpermits passing the impurities in the oil through to the com- bustion chamber without danger of clogging the small portable forge is also shown, using tlie same princi-ples of operation as the outfit described above. It is conveni-ently mounted on a strong, wrought iron stand provided withtwo trays; the bottom one may be used as a cold rivet bin, theupper one for tools. MULTIPLE PUNCH FOR CAR UNDERFRAMES BY GEORGE P. THOMAS Prt-sident, Thomas Spacing Machine Company, Pittsburgh, Pa. THE NECESSITY of reducing manufacturing cost, withlabor cost tending to stay , makes standardiza-tion of design a most important consideration in plantsengaged in steel construction, such as steel car shops. Onlyon the basis of standardized design is it possible to take. Fig. 1—Car Underframe Type Multiple Punch with Interchange-able Special Tools advantage of the possibilities offered by special tools whichwill increase output and cheapen unit costs through quantityproduction. The demand for a punching machine with a wide rangeof application, such as is found in the steel car shops, wasresponsible for the design, or perhaps it may better besaid, the development, of the machine here described. Thepunch with several of the interchangeable punching andblanking-out tools and dies is shown in Fig. 1. This ma-chine was built for one of the large tank car utility and capacity are greatly increased when it isoperated in conjunction with a spacing table, as describedin subsequent paragraphs. Steel car underframe work requires punching, shearingand sometimes coping and blanking-out of plates or struc-tural sections. In some cases the structural sections are madeby flanging flat plates, which are punched most read
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
