. 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. from leaving the seat and causing annoyance by rattling. 173. CONCENTRIC VALVES, CORLISS TYPE. This valve,although essentially of the Corliss class, differs from the ordinary in that the steam valve is inclosed in theexhaust valve, .making practically onlytwo valves,
. 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. from leaving the seat and causing annoyance by rattling. 173. CONCENTRIC VALVES, CORLISS TYPE. This valve,although essentially of the Corliss class, differs from the ordinary in that the steam valve is inclosed in theexhaust valve, .making practically onlytwo valves, which, however, perform thefunctions of four perfectly. A crosssection through the cylinder and valvesis presented, where E is the exhaustvalve and S the steam valve. Thesteam valve, of the double-ported bal-anced type, is held within the exhaustvalve E, but is not set exactly in the center of the latter valve, sothat it is held in position by steam pressure. The usual vacuum dash-pots are replaced by spring dashpots—that is, the tension of springs isreHed upon to close the valves, while the air cushioned in the dashpotcylinder prevents the shock which would be inevitable were it not used. 174. OSCILLATING STEAMAND EXHAUST VALVE, forhoisting engines. The valve isoperated by a direct rod from crank-pin arm to the valve a
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Keywords: ., bookauthorhiscoxgardnerdexter18, bookcentury1900, bookdecade1910
