6 



WarcTs Patent for Iinproveme?its 



piston-rod, d, d, pipes leading to the air-tight boxes, e, 

 and E, covering the inlet valves, and f, which valves are 

 moved by rods g, connected by pins, h, h, vt^ith the said 

 inlet valves. The rods, g, g, are moveable in their re- 

 spective air-tight stuffing-boxes, i, i, and are moved by 

 the combination of levers, k, k, and K, k, attached to the 

 rods, G, G, at L, and l, and moving on centres, or joints, 

 fixed to the top of the valve-boxes, or other firm support, 

 at M, M. Such system of levers and valve-rods are actu- 

 ated by the bars, n, n, and the lever, o, connected to an 

 eccentric, as hereinafter described, or other suitable move- 

 ment. 



The pipes, p, p, lead to air-tight boxes, e^, and e% 

 covering the outlet valves, f^, and f^, moving in suitable 

 guides (not shown in the drawing), and to which the rods, 

 G^, and G^j are adapted, so as to close such outlet valves, 

 but not to open them. The rods, g^, and g^, move in the 

 air-tight stuffing-boxes, and i^, and are respectively 

 moved by the levers, k^, k^, and k^, k^, the set belonging 

 to the upper outlet valve being actuated by the rod, r, 

 and the lever, s, s, and the set belonging to the lower 

 outlet valve being actuated by the rod, t, and the lever, 

 u, u, and which levers, s, s, and u, u, are moved, at the 

 proper period of the stroke of the piston, by the eccentric, 

 as hereinafter described, or other suitable movements, w, 

 represents a counterpoise, or weight, for raising the upper 

 outlet valve. 



Although, for the sake of facility of description, I have 

 only drawn and described four valves in the pump, yet 1 

 prefer that twelve valves should be used, namely, three 

 inlet and three outlet valves in the top of the cylinder, and 

 three inlet and three outlet valves in the bottom of the 

 cylinder, each of such valves having apparatus communi- 

 cating such movement as herein described. 



The upper outlet valves are to be counterpoised by 

 weights, or springs, as hereinbefore described, with regard 

 to the pump hereinbefore firstly described; but as, in the 

 pump now under description, the outlet valves work within 

 air-tight boxes, the counterpoises, or springs, for such 

 upper outlet valves are to be placed within such boxes, or 

 so as to communicate with such valves through air-tight 

 stuffing-boxes. 



I prefer working the inlet and outlet valves by the 

 movement by extension^ which is produced at the end of 



