US95222A - Improvement in pumps - Google Patents

Description

` UNrTnD STATES OHALKLEY GRISOOM, LEWIS Gli-ISCOM, AND J OHN l?. GRISOOI, OF MAHANOY PLANE, PENNSYLVANIA MPROVEMENT IIN PUMPS.

Specification forming part of Letters Patent No. 95,222, dated September 8, 156D.

To all whom t may con/cern;

Be it known that we, GHALKLEY Gniscoir, Lnwis Gnrscoir, and JOHN P. Gnrscoir, of Mahancy Plane, in the county of Schuylkill and Sta-te of Pennsylvania, have invented a new and Improved Pump; and we do hereby declare that the following is a full, clear, and exact description thereof, which will enable others skilled in the art to make and use the same, reference being had to the accompanying drawings, forming part of this specification;

Figure l represents a vertical longitudinal section of our improved pump` Fig. 2 is a plan or top View ofthe same. Fig. 3 is a vertical transverse section of the same, taken on the plane of the line a; x, Fig. 2. detail vertical transverse section of the same, taken on the plane of the line g/ y, Fig. 2.

Similar letters of reference indicate corresponding parts.

This invention relates to a new pump to be used for mining and other purposes; and its object isv to throw a continuous stream and-to keep the water at an uninterrupted flow, so that when the column of water is once started it will continue to move so long as the pump is in motion. object, besides a novel construction of pump, we connect the supply and discharge pipe with two double-acting reciprocating pumps, the cranks of which stand at right angles to eac-h other, so that when the piston of one pump arrives at the end of the stroke the other piston will be at full work and will keep the column of water in motion.

IVe are aware that two single-acting pumps have already been used jointly for throwing a steady stream, but they can never be made to throw a continuous stream, and there will be the jar and loss of power caused by the frequent starting of the column. One double` acting pump will also labor under the same difculty, and only where two double acting pumps are used will a steady continuous stream be produced. The friction saved by the employ ment of two pistons for working four sets of valves will alone amount to a considerable saving. l Our invention consists also in a novel arrangement of the clock-chamber and in a new mode of connecting the piston-rod of the oper riguar To more eifectually obtain this ating-cylinc'lcr with the pump rod or rods, all being so arranged as to produce the aforesaid steady stream with the least amount of power.

A Bin the drawings are two steam-cylinders, arranged in a horigiontal or other position parallel to eachother or otherwise, as may be desired.

C I) are two pump-cylinders, arranged, respectively, oppcsiteto and in line with the cylinders A B. Upon each pump-cylinder is set a clack-ohamber, E, and the clank-chambers of the two pumps are connected with each other by the branched suction-pipe F, and by the branched dischargepipe G, as is clearly shown in Fig. 3.

v H H are the piston-rods ofthe cylinders A B. I I are the pistonrods of the pump-plungers .l J, that are to be moved back and forth in the cylinders G D. Each piston-.rod His connected with its opposite plungersrod I by means of an upright yoke, K, into opposite sides of which-both rods H and I are screwed or otherwise rigidly fastened. These yokcs havelips a @projecting from their outer sides, said lips fitting over or around the upper and lower edges of stationary guideplates L, that are arranged on thebed of the machine, asindicated i in Fig. 4. The inner faces of the yokes are grooved up and down, as in Figs. l and 2. Into these grooves it the wrist-pins Z1 of cranks c, formed on the opposite ends of a horizontal shaft, M, on which thc iiy-wheel Nis mounted. As the piston-rods are drawn back and forth, they impart direct motion to the pump-plungers, and by means of the grooves in the yoke, and by the wrist-pins they also impart rotary motion to the iiy-wheel shaft M. By means of this arrangement of the yokes l, the piston and pump rodsmay be as short or as long as may be desired, no extension connecting-rod being employed. For mining purposes this is very convenient, as the machine can be set up on a very contracted bed. Moreover, by the connection of the shaft, one engine, whenthe other is not to be used, can be employed to operatc both pumps, or both enginesmay work one pump. In either case no other coupling will be employed. The cranks on the shaft M stand at right angles to each other. Thereby an effectual device for overcoming the dead-point is produced, as one engine is at the middle of its stroke whenever the other is at-the end, and the column of water in motion. In this manthus one engine always serves to overcome the dead-point of the other engine. Another advantage of having the cranks arranged at right angles is to keep the column of water in' constant motion, as when one pump-plunger is at the end of its stroke the other plunger will be at the middle of its stroke and the column of water will consequently be in constant motion, provided each pump is double-acting.

To prevent friction on the wrist-pins b,there are frictionu'ollers d d, arranged around them, as shown in Figs. l and 4. Each of the clack.- chambers E is, by means of two diagonal partitions, e e, divided into four compartments, f, g, h, andi, as shown in Fig. I. The two compartments f and h are respectively connected by means of channels j 7' with the ends of the pump-cylinder. rIhe compartments g and t', which are between f and h, as shown, communicate, respectively with the suction and discharge pipes. TheV partitions e, between the four compartments f g h t', are provided witli four valves, f', g', h', and. i, as shown in Fig. l, all of these valves opening upward.

The action of each pump will now be easily understood. If the plunger J moves in the direction of thearrow shown in Fig. l, it draws the valve g open by suction and draws the liquid from the suction-pipe into the chamber g,theneeinto 7i, and finally into the pump-cylinder. The same suction serves to keep the Valve 7i on its seat. At the same time the plunger will force the water in front of itinto the chamber f, the water thus forced opening the valve t" and escaping into the discharge-pipe, the valvef being closed. Vhen the motion of the plunger is reversed, the water drawn in by the previous stroke will be forced out through the valve 7L,while the suction will operate by opening the valve j". A doubleacting pump -is thus produced, which keeps a constant stream in motion, except when the plunger arrives at either end of its cylinder. At that time, however, the plunger of the other pump is, owing to the position of the cranks on the Shaft M, at the middle of its stroke, and keeps ner a column of water is kept constantly moving, as when one pumps stops the other will bewerking, and vice versa.` All the shocks and jars consequent upon the interruption of the column of water are thus avoided7 and so much friction is saved that the pumps can be worked much quicker than one single doubleacting pump, or two connected single-acting pumps could ever -be operated. By having the valves arranged diagonally,the corners in the clack-chamber are avoided and the water may move straight forward through the claekchamber, as indicated by arrows in Fig. 1.

We claim as new and desire to secure by Letters Patent l. The yoke K, -to which the steanrpiston rod and the pump-plunger rod I are secured, when provided with the lips a, fitting around the upper and lower edges of the stationary guide L, and adapted to receive the crank vpins 4of the ily-wheel shaft M, all arranged as described, for the purpose specified.

2. The arrangement and combination with each other of the iy; wheel shaft M, crankpins I), grooved sliding yokes K, stationary guides L, piston-rods H H, and plunger-rods I I, all arranged and operating substantially as herein shown and described, for the purpose specied.

3. A mining-pump consisting of two steamcylinders, A B, of two pump-cylinders, C D, which have clack-chambers E with X-shaped partitions, both clack-chambers communicating with the suction and discharge pipes, as set forth, the piston and plunger rods being connected by means of slidinggrooved yokes K, which drive the fly-wheel 'shaft M-, the cranks C' of which stand at right angles to cach other, substantially as described, for the purpose specified.

Vitnesses:

JAC/on SHELLEY, T. H. BEoHrnL.

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