. 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. 236. DIFFERENTIAL EXHAUSTVALVE. For regulating the back pressureon the engine in exhaust steam-heatingsystems. The two-winged valves are nearly bal-anced, requiring only a small weight to bal-ance them and prevent chatter of the valves. STEAM POWER APPLIANCES. lOI 237
. 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. 236. DIFFERENTIAL EXHAUSTVALVE. For regulating the back pressureon the engine in exhaust steam-heatingsystems. The two-winged valves are nearly bal-anced, requiring only a small weight to bal-ance them and prevent chatter of the valves. STEAM POWER APPLIANCES. lOI 237. AUTOMATIC QUICK-CLOSING VALVE. The bonnetpiston C has a larger area than the valve disk and communicateswith the steam pressure in the main pipe through its hollow leakage of steam around the loose-fitting sleeve of the piston at Gequalizes the pressure on both sides when the relief pipe is 238. The automatic electric controller, shown at the right, has a mag-netic dog that disengages a weight which falls against a lever and opensthe relief valve and quickly closes the valve by the greater pressure onthe rear of the piston. The screw spindle S closes the valve as an ordinary stop electric push buttons are placed where needed for emergencies. 239- REVERSIBLE THROTTLE VALVE. In this design an angle or straight way valve may bemade convertible by rotating theflange connection of the two partsof the body. A most convenient design forfacilitating repairs. The valvespindle carries a bevel pinionmeshing in a sector gear on thevalve disk, which opens or closesby a 90° revolution on its face. 240. Plan of valve disk. 241. Sector gear on disk.
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Keywords: ., bookauthorhiscoxgardnerdexter18, bookcentury1900, bookdecade1910
