. Railway and Locomotive Engineering . linders allowing the springs to seatthe valves shutting off the steam whileat the same time the air has been re-leased from the train line allowing thebrakes to set just as if the train hadbroken apart and the locomotive isbrought to a stop without the help ofthe engineer. To start again it will beonly necessary to close the releasingvalve and the air pressure will immedi-ately build up and open the valves andallow the brakes to be released. I have no doubt but that a perfectedmachine will be much better than theone that I have outlined and there doesnot
. Railway and Locomotive Engineering . linders allowing the springs to seatthe valves shutting off the steam whileat the same time the air has been re-leased from the train line allowing thebrakes to set just as if the train hadbroken apart and the locomotive isbrought to a stop without the help ofthe engineer. To start again it will beonly necessary to close the releasingvalve and the air pressure will immedi-ately build up and open the valves andallow the brakes to be released. I have no doubt but that a perfectedmachine will be much better than theone that I have outlined and there doesnot seem to be any weighty reason whysuch a one cannot be designed that willanswer all of the requirements. H. W. Dedham, Mass. Tire Heater, Forge, and Wheel Pit Jack. Editor: Enclosed find four sketches of gooddevices for use in locomotive repairwork in roundhouses. Fig. A shows ahome-made wheel flange heater forwarming the tires of locomotive wheelsand which may be readily constructedin any repair shop at a limited FIG. B. GASOLINE FORGE. Fig. B shows a typical gasolene forgefor forging copper pipes, flanges, unionson copper pipes, and other similar workin the constant requirements of gen-eral roundhouse work. Fig. C shows a common wheel pitfitted with air lifting cylinders forchanging the driving wheels, when nec-essary, of the running engines, as alsowhen changing the wheels on front ortender trucks. Figs. D and E show the jack headadapted to receive the axles of the March, 1913. RAILWAY AND LOCOMOTIVE ENGINEERING. 89 wheels from which the wheels may bereadily transferred preparatory to re-moval; the jack head, together with thepin, E, may be withdrawn from thejack cylinder when the apparatus is notin use. J- G. Montreal, Canada. The Misuse of Sand. Editor: Mr. Smoots letter on sand pipes inthe February issue of and Loco- north west wind singing a melancholytune, but no kind of wind gets throughthe sand pipes until an exhaustiveseries of
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