. Mechanical appliances, mechanical movements and novelties of construction; a complete work and a continuation, as a second volume, of the author's book entitled "Mechanical movements, powers and devices" ... including an explanatory chapter on the leading conceptions of perpetual motion existing during the past three centuries. ar. Itwill be seen that the crosshead bar imparts a hori-zontal movement to the valve stem, which move-ment is equal to the lap and lead of the valve. 205. FLOATING VALVE GEAR or reversing ram for marineengines. The floating lever g is here connected to the crosshead
. Mechanical appliances, mechanical movements and novelties of construction; a complete work and a continuation, as a second volume, of the author's book entitled "Mechanical movements, powers and devices" ... including an explanatory chapter on the leading conceptions of perpetual motion existing during the past three centuries. ar. Itwill be seen that the crosshead bar imparts a hori-zontal movement to the valve stem, which move-ment is equal to the lap and lead of the valve. 205. FLOATING VALVE GEAR or reversing ram for marineengines. The floating lever g is here connected to the crosshead at k. The rod / is hinged at /i tothe floating lever, and con-nects it with the valve rod e is hinged at i tothe floating lever, and con-nects it with the reverse leverd. Then, the piston beingstationary, the floating leverswings around k as a. fulcrum,and the valve is forced to theleft. This valve is an indirectvalve, that is, it takes steam atthe center and exhausts pastits outside edges—just the reverse of the ordinary D slide valve. Thelower end of the floating lever moving with the crosshead, it tends toswing around / and thus return the valve to its mid-position. Shouldthe piston creep in either direction, the valve gear will automaticallyreturn it to its proper position. To prevent shocks due to a sudden. 94 STEAM POWER APPLIANCES. movement of the reverse lever, buffer springs /, / are provided, whichgradually bring the moving parts to rest. In both gears shown, suitable stops in the valve chest prevent thevalve from being moved beyond the positions required for a full open-ing of the ports. 206. Shows valve on center for stop motion.
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Keywords: ., bookauthorhiscoxga, bookcentury1900, bookdecade1910, bookyear1910
