. Locomotive engineering : a practical journal of railway motive power and rolling stock . * Lacomotive Ej\jineeritig QUICK RELEASE VALVE FOR SWITCH ENGINES. broken loose. This breaking loose de-pends on the degree with which the pis-ton sticks to its cylinder, which may re-quire only I or 2 pounds to jerk it loose,or may require 10 or 15. But by watchingthe gage alone a man cannot tell which ofthese three irregularities causes the unduequick-action application. One is easilymistaken for the other, and under certainconditions one defective part may do justwhat another was expected to, and vice


. Locomotive engineering : a practical journal of railway motive power and rolling stock . * Lacomotive Ej\jineeritig QUICK RELEASE VALVE FOR SWITCH ENGINES. broken loose. This breaking loose de-pends on the degree with which the pis-ton sticks to its cylinder, which may re-quire only I or 2 pounds to jerk it loose,or may require 10 or 15. But by watchingthe gage alone a man cannot tell which ofthese three irregularities causes the unduequick-action application. One is easilymistaken for the other, and under certainconditions one defective part may do justwhat another was expected to, and viceversa. So Sling for Lifting Air Pumps. Editor: The enclosed drawing shows a slingfor 8-inch air pumps which has been inuse in the Vandalia roundhouse for over ==3^. LOCOMOTIVE ENGINEERING Four Thousand Pound Driver Brakes. Editor: On page 53 of your January journalyou say it is wretched engineering tobuild driver brakes that weigh 4,000pounds. Maybe it is, and maybe it have got to make brakes strongenough to hold the engine. A heavy en-gine must have a heavy brake. Some ofthe battleships, called engines to-day, pullany train that is loose at both ends, andyou have to use a spyglass to see thecaboose. These royal hogs must havestrong driver brakes to hold them. Youcant do it with broom straws or is fco expensive nowadays thatladies will soon be wearing iron jewelryif it keeps up. No brake company is goingto squander iron in driver brakes. TheAmerican Brake Company has made lib-eral use of iron in making good, strongbrakes. If they hadnt, their outsideequalized brake would not be the standardof the country to-day. But they are notsuch poor engineers to pile on a big heapof iron just to see it hang. None of thebrakes on the Cha


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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroa, bookyear1892