. American engineer and railroad journal . - ■. -> BV-PASS VALVE ARRANGEMENT. their operating mechanism being secured to the locomotiveframes, and deflector plates, forming the upper part of the secured to the mudring and extending down inside ofthe hopper section. There is an air inlet space 7 in. wide, in ahorizontal direction, between the two sections. The arrange-ment and shape of this air space is well shown in the cross sec-tion of the pan. While the weight of the two parts is princi-pally held by the frames and boiler respectively they are securedtogether and stiffened b
. American engineer and railroad journal . - ■. -> BV-PASS VALVE ARRANGEMENT. their operating mechanism being secured to the locomotiveframes, and deflector plates, forming the upper part of the secured to the mudring and extending down inside ofthe hopper section. There is an air inlet space 7 in. wide, in ahorizontal direction, between the two sections. The arrange-ment and shape of this air space is well shown in the cross sec-tion of the pan. While the weight of the two parts is princi-pally held by the frames and boiler respectively they are securedtogether and stiffened by the plates forming the end of the panand by two intermediate J4-in. stiffening plates secured to eachthrough the medium of angles. The doors closing the hopper openings are of the swinginglink type, being arranged to fit over and seat upon an extension. FRAME CROSS-TIE AT CYLINDERS. of the hopper frame. The swinging link is so designed that thefirst movement of the doors is directly outward to clear thisflange and then swing upward, as is shown by the dotted linesin the illustration. The operating mechanism is arranged sothat the doors may be securely locked or held open at any de-sired point. This design of pan gives unusually large openingsfor air, which is well diffused before reaching the grates, andat the same time it acts as a perfect protection against fire beingblown out of the pan or otherwise escaping. Cylinders.—In the design of the cylinders every opportunityhas been taken for the reduction of weight where it could bedone without sacrificing strength or steam economy. The chambers have been set inside of the cylinders almost di-rectly over the frames and in the line of the steam passage tothe cylinders. This location of the valve has made necessary an alteration of the design of Walschaert valve gear previou
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
