USRE4204E - Improvement in pumps - Google Patents

Description

l llltitrh iate5 aan effet To all whom it may concern: l

Be it known that we, CHALKLE'Y Gnrsco1r,`Lnw1s Gmsconr, and J oHN P.\GRIsconr, of Mahanoy llane, in the county of Schuylkill and State of Pennsylvania, have invented certain new and useful Improvements in Pumps; and do hereby declzue the following to be a full, clear, and exact description thereof, reference being had tothe accompanying drawing and to the letters of reference marked thereon. 4

The vnature of our invention consists in the construction and arrangement of a pump, to be used for mining and other purposes; and

Its object is to throw a continuous stream, and to keep the water at an uninterrupted flow, so that. when the columnef' 'water isonce started it will continue to move so long as the pump is in motion.

In order to enable others skilled in the' art to which our invention appertaius to make and use the same we will now proceed to describe its construction and operation, referring to theannexed drawing which -lorlns a part of' this specification, and in which- Figure 1 is a longitudinal vertical section' of our improved pump.

Figure 2 is a plan or top view of the same. Figure 3 is an enlarged transverse vertical section of the same, taken on the plane vof the line zx, iig. 2.

Figure 4 is a' detail transverse vertical section of the same, taken on the plane of the line y y, iig. 2.

Figure 5 is an enlarged perspective View of the cross-head which connects the piston-rod with the plunger-rod. v

A B represent two steam-cylimlers, arranged in a horizontal or other position, parallel to each other, or otherwise, as may be desired.

C D are two pump-cylinders, arranged respectively opposite to and in line with the cylinders A B.

' Upon each pump-cylinder is set a clack-chamber, E, and the clash-chambers of the two pumps are connected with each other by the branched suction-pipe F, and by the branched discharge-pipe G, as is clearly shown iu fig. 3. It will be noticed that the partition which divides the upper end of the suction-pipe F has a point coming down in the center, and that the branches of said suction-pipe do not dividev at right angles, but are curved; hence, there is very little if any resistance and loss of force, as the water drawn up through the pipe F strikes the point of the parti-l tion and is gradually turned olf toward both sides into the clack-chambers. In like manner the blanches, at the lower end of the discharge-pipe G, are curved, so that, when or at the point where the two streams unite, they have already been diverted to nearly the direc- -CHALKLEY cmso'on, LEWIS caisson, AND JOHN i?. einsoon, or MA- HANOY PLANE,

PENNSYLVANIA.

Letters Patent No. 95,222, dated September 28, 1869; reissue No, 4,204, dated December 20, 1870.

IM'PRovEMENT IN PUMPS.

The Schedule referred to in these Letten Patent part of the same.

I-I H' are the piston-'rods of the cylinders A B.

l. I'I are the piston-rods ot' the pump-plungers J J that are moved back and forth in the cylinders C D.'

Each piston-rod His connected with its plungerrod l by means of an upright cross-head, K, into opposite sides of which both rods H and I are screwed or otherwise rigidly fastened.

'Ihese cross-heads llave'lips, a a, projecting from their outer sides, said lips .fitting over or around the upper and lower edges of stationary guide-plates, L, that are arranged on the bed of the machine, as iudicated in fig. 4.

'The lips a a project, as mentioned, not only from the outer side of the cross-head, but also for a. suitable distance on each side, 'that is, towardth'e engine'. and the cylinder,'for a purpose that will be presently described.

The inner faces ofthe cross-heads are grooved up and down, as in gs. l and 2..

Into these grooves lit the wrist-pins b of cranks c, formed 011 the opposite ends of a horizontal shaft, M.

As the piston-rods are drawn back andl forth they impart direct motion to the pump-plungers,'and, by means of the grooves in the cross-heads and by the wrist-pins, they also impart rotary mot-ion to the shaft M.

Thecross-heads K K, it'will be noticed, are solid, and grooved only sufficiently deep to ladmit the wristpins b l. By this construction we obtain a vastly iucreased strength to iresist the strain upon it, and, by the lips a a, projecting o'nboth sides, theyare lirmly held to the stationary. guide L, so as to slide on the same, but have no vibrating motion. When the Wrist-pin is at either end ol' the cross-head the tendency would naturally be to tip the cross-head; but the lips heilig longer than the width of the cross-head, this tendency is entirely obviated and the cross-head is made to move with the utmost steadiness.

By-meaus of this arrangement of the cross-heads K K the piston and pump-rods may be as short or as long as may be desired. For mining purposes this is very convenient, as the machine can be set up on a very contracted bed. Both engines' may be employed to work one pump when so desired.

The cranks cc on the shaft M stand at right'angles to each other, thereby forming an eifectual device for overcoming the dead-point, as one engine is at the middle of its stroke whenever the other. is at the end, and thus 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' columncof water in constant motion, as when one pump-plungerA is at the tion of said discharge-pipe.

end of its stroke the other plunger will be at the 'as shown in middle ofv its stroke, and the, column of water will,

The compartments g and i, which are between f and h, as shown, communicate respectively with the? suction and discharge-pipes. y

The partitions e e, between the four compartments f g h t, are provided with four valves, f', g', h', and i',

fig. l, all of these valves opening npward.` v I.

rlhe action of each part of our machine will now be easily understood.

If the plunger J moves in the direction of the arrow, shown in g. 1, it draws the valve g open by suction and draws the liquid from the suction or tailpipeF into the chambor g, thence into h, and finally into the pump-cylinder.

The same suction serves to keep the valve h on its seat. At the same time, the plunger will force the water in front of it into the chamber f, the water thus forced opening the valve i', and escaping into the discharge or column-pipe Gr, the valve f being closed.

From the position of the cranks c c on the shaftM, as above described, it is evident that, at jthe time when the plunger J is at the dead-point or end of the cylinder and commences its stroke, as indicated by the arrow, the other plunger, J', is at the middle of its stroke, and when the former plunger, J, has completed one-half of its stroke, or is at the center of its cylinder, then the plunger J will just pass the dead'- point and operate in the same manner. o

lVhen the motion of the plunger J- is reversed, the

I water drawn in by the previous stroke will be forced out through-the valve h', while the suction will opererate by opening the`valve f Then this movement of the plunger J commences, the other plunger, J', is

' 'at the middle of its stroke. Hence it will be seen by means, of two I,

.that the forceexerted upon the column of water is at all times thesarnp'e'under the same head of steam';`be cause when the force ot"one plunger increases the `other decreases, and vice rersaand when one plunger is at the height of its stroke the other is at the deadpoint,

. curved branches into the clack-chambers and cylinders,

andfromthcm through the curved branches into and outof tliecolumn-pipe Gr. y

Having thus fully described our invention,

What we claim as new, and desire' to secure by Letters Patent, is`

1. The cross-heads grooves on their inner faces, and with angular lips on their backs which extend beyond the sides of the cross-heads and over the edges of the stationary guides L, all arranged bet-weeuthe steam andA pumpcylinders of a double-acting steam-pump,.substantially as set forth.

2. The combination ofy the cross-heads K, constructed as described, the piston-rods H, plunger-rods I, stationary'. guides L, and the crank-.shaft M, with its armsc placed at right angles," all operating as set forth.

3. The combination of theA induction and ednction pipes F and G, each with twocurved branches, form- .ing a central'eone,arranged between and actingl with the two clack-cbambers E E, having X'- shaped partitions land valves, and the pump-cylinders C D, all substantially as and for the purposes herein Set forth.

4. The combination and arrangement of the steamcylinders A B, piston-rods H H', stationary guides L L, cross-heads K K, crank-shaft M, pump-cylinders C D, clack-ohambers E E, and the suction and dischargepipes F and G, all constructed to operate substantially as and for the purposes herein set forth.

In testimony that we claim the kforegoing we have hereunto set our hands this 24th d( y of October, 1870.' CHALKLEY GRISCOM.

LEWIS GRISOOM. JOHN P. GRISCOM.

Witnesses GEORGE W. DOWNING, Ross BULL.

K, made solid, with vertical

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