Improvement in double force-pumps
US 183500 A
Description (OCR text may contain errors)
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MISTER, FHOT0 UTHDGRIFHER WASHINGTON. D. C.
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PATENT HIRAM HULBERT, BENJAMN F. NASH, AND HARVEY W. NASH, OF.
IMPROVEMENT IN DOUBLE FORCE-PUMPS.
Specification forming part of Letters Patent No. 183,500, dated October 24, 1876; application filed July 11, 1876.
To all whom it may concern:
Be it known that we, HIRAM HULBERT, BENJ. F.NAsH, and HARVEY W. NASH, all of the town of Plymouth, in the county of Sheboygan and State of Wisconsin, have invented certain Improvements in Double-Acting Force-Pumps, of which the following is a specication:
Our invention relates to any pumps where force is used to raise or inject air or water.
The invention consists in an outside perforated valved cylinder, into which a piston works, as shown. An inner cylinder or piston-head works within the outer or main cylinder, and it is operated by a piston-rod, connected to a steam-engine or other motive power. The inner cylinder is provided with suitable perforations, each governed by an independent valve opening inward. The piston-rod is hollow, and is perforatedmore or less, within the chamber ofthe inner cylinder. These perforations may, as is obvious, be controlled by the exigencies of the purpose to which the invention may be diverted.
We are aware of the patent of H. M. Stoker, No. 48,219, of June 13, 1865, and also of the patent to O. A., Clarke, No. 32,048,
April 16, 1861; and the present invention is.
an improvement thereon.
We have discovered that in many cases it is necessary to use a double-acting pump in places where the shallowness of the water will not admit of the reciprocation of a cylinder, whether it be large or comparatively small. We have also discovered that it is desirable to reduce the size of the cylinder as much as possible, in order to make the invention especially effective in shallow water without disturbing the walls of the cistern, well, &c., and without muddying the water from excessive irritation, agitation, Snc.
We will now describe what we consider the best means of carrying out our invention.
The outer cylinder in our invention may be made as small as ten (l0) inches in height. It is apparent that such a construction would be especially effective in certain cases,
The drawing represents a vertical section of our invention. .Referring thereto, A is the cylinder, cast in one or more pieces, or made A of boiler-iron, made water-tight in any suitable manner. The'upper and lower surfaces are perforated at a a', and opening inward from such perforations are valves, so hinged as to be susceptible to `the action of the slightest pressure. B is an inner cylinder or piston-head, having a chamber inside, perforated in two or more places, b b', upon both upper and under surfaces thereof, each perforation of which is controlled by an independent valve opening inward. C is a hollow piston-rod, passing through suitable packing into the cylinder A, and into the inner cylinder B. It may extend entirely through the same into the lower plate thereof, and be perforated, as desired, between the upper and lower plates, or it may terminate at the upper plate, opening into the inner chamber. c 0 are the perforations, as shown.
The upper and lower plates of the inner cylinder approach nearly to the inner surface of the outer cylinder, and between these two suitable packing may be introduced.
It being understood that the entire outer cylinder is submerged, lthe operation of our invention isas follows: The descent of the piston-rod (l creates a partial vacuum in the upper portion of the outer cylinder A, and consequently opens the valve at a, through which the water enters. The return movement'of the piston-rod closes the valve at a and opens .the valve b in the inner cylinder B,.from whence the water passes through c into the hollow piston-rod C, and is ejected, as desired. The operation thereafter is ob- .vious.
We are aware that a reciprocating perforated valved cylinder has been before used in connection with a stationary hollow piston and a solid annular valve, but such a construction requires great depth vof water, tends to muddy the water, and is inoperative in general low-water wells and cisterns..
Our invention is adapted for use in shallow water without material disturbance, and is constructed at little cost, and operates efciently.
We are also aware that annular valves, made in one piecelto cover several apertures, have been before used, but these fail in practiee to operate eoientlyyas. the friction upon as ourown invention we y,ax our `signatures `either side binds the annular valve, and allows in presence of two `Witnesses. i
some of the apertures to become inoperative. HIRAM HULERT We `olaim i The stationary cylinder A, having the valves a a', in combination with the recipro-` Witnessesh y eating inner `cylinder B,` having Vinlet-aper-l H N KILLSON tures, each aperture being providedNwith-a Y 'A"POOL separate @lack-valve, b b', and with the hollow perforated vpiston-rod G @,as and for the purf; Witnesses forH. NASH: poses specified. 1 H. CLAY SMITH,
In testimony that We claim" the foregoing THOMAS G. GONNOLLY.