84 TuAXSACTioys of the Amebic ax Institute. 



readily faced by the simple process of filing. For mining or wreck- 

 ing purposes, rnbber valves of like form and construction may be 

 used by simply inserting a metal bar througli their center to keep 

 the surface in position ; tlie valves have just sufficient lift to pass the 

 "water, and are fitted with au elliptic removable spring on each valve, 

 which spring, in case of rapid motion, insures the valve being closed 

 at the proper moment. Another advantage in this form of valve is, 

 that in case of accident, or, by any reason, a valve should be lost, or 

 become unserviceable, its place may be temporarily supplied by a 

 hard block of wood of like form aiid faced surface, and the pump 

 vrill work right on in the discharge of its duty with equal facility as 

 if the proper metal valves were in operation, thereby rendering the 

 user in his emergency, independent of contiguity to machine shops." 

 " Secondly. For its arrangement of steam valve, whereby this 

 pump Avill start at any point of stroke ; it is further claimed that by 

 this arrangement of steam valve that the pump will work, as has 

 been practically demonstrated, submerged thirty feet under water, 

 and, for this reason, is equally adapted to mining as for other pur- 

 poses ; it (the steam valve) being a cylinder, formed with or attached 

 to an ordinary slide valve, with a stationary piston in the inside of 

 said valve cylinder, the piston rod extending through covers at each 

 end, and fitting steam chest so it cannot move, said covers being so 

 arranged as to act as cushions for steam valve, steam being admitted 

 to main valve by a small auxiliary valve through ports on same face 

 or seat, connected with main valve, and which auxiliary valve is 

 .operated by the rock shaft connected to crosshead on side of pump ; 

 the under side of main valve being faced to correspond with valve 

 Beat on steam cylinder, by which, in case of wear, the valve and seat 

 may readily be refaced. 



" Thirdly, In importance, is the fact, as a matter of economy to 

 those who use steam pumps, that this pump is cast, as far as possil)le, 

 in separate parts ; while, at the same time, it retains the utmost 

 simplicity and durability of construction. It frequently occurs, by 

 reason of accident and especially in cold climates by the action of 

 fi-ost, some part of a steam pump will crack, or otherwise become 

 worthless, when, by reason of this pump, being cast in separate parts, 

 to such an extent that the immediate part aftectcd only becomes 

 worthless, and can be replaced at much less expense than if there 

 ■were a less number of pieces, it becomes a matter of saving, and con- 

 sequently of very great importance to the purchaser." 



