. 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. ^yyA^yyyy^^^^^/^^^^^/////^ A rocker arm linked to the piston rod of each side of the pump oper-ates its opposite valve. 303. VALVE MOVEMENT. Single steam pump. Knowlestype. Freedom from a dead center is secured by the use of the. auxiliary piston A, which works in the
. 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. ^yyA^yyyy^^^^^/^^^^^/////^ A rocker arm linked to the piston rod of each side of the pump oper-ates its opposite valve. 303. VALVE MOVEMENT. Single steam pump. Knowlestype. Freedom from a dead center is secured by the use of the. auxiliary piston A, which works in the steam chest and drives the mainslide valve M. This main valve is of the B form and moves on a flatseat; it has on top a stem which fits into a recess in the chest piston addition to this it has on each end a small lip which alternatelycovers and uncovers a small fifth port S, which enters the cylinder at HYDRAULIC POWER AND APPLIANCES. 129 each end near the head. In operation, the steam piston runs over themain port, and this small fifth port being closed by the above lip,a cushion is obtained. When the main valve M is reversed the lipuncovers the port and admits steam, which starts the piston back easyuntil the main port is uncovered ; the pump thus changes its strokevery smoothly.
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Keywords: ., bookauthorhiscoxgardnerdexter18, bookcentury1900, bookdecade1910
