US188977A - Improvement in force-pumps - Google Patents

Description

W. N. STARR.

FORCE-PUMP.

N0,188,977, Patented March 27,1877.

INVENTOR @MW M4 ATTORN EY/,

WRTNESSES N.PYERS, PHOT0LITHOGRAPHER. WASHINGTON. D C.

UNITED STATES PATEN WILLIAM N. STARR, OF ASHLAND, OHIO.

IMPROVEMENT IN FORCE-PUMPS.

Speciiicationforming part of Letters Patent No. l88,977, dated March :17, 1877; application tiled February 24, 1877.

To all whom it may concern Be it known that I, WILLIAM N. STARR, of Ashland, in the county of Ashland and State of Ohio, have invented a new and valuable Improvement in Force-Pumps; and I do hereby declare that the following is a full, clear, and exact description of the construction and operation of the same, reference being had to the annexed drawings, making a part of this specitication, and to the letters and figures of reference marked thereon.

Figure l of the drawings is a representation of a central vertical section of my force pump; and Fig. 2 is a side elevation of the same.

This invention relates to force-pumps.

The nature of said invention consists in certain improvements in pumps, as will be hereinafter more fully set forth.

In the accompanying drawings, A designates the hollow upper casing or pump-post of a force-pump; andBdesignates an operating-lever or pump-handle, pivoted in a slot, a, at the top of said casing. The inner end of said lever or handle B gives vertical reciprocating motion to a piston-rod, C, within said casing or hollow pump-post A. The lower part of said piston-rod works in a pump-cylinder, consisting of a larger lower cylinder, D, and a smaller upper cylinder, E. The contiguous ends of said parts D and E are provided with annular flanges d and e, between which sets a packing-ring, F, of leather, rubber, or other suitable material.

In the smaller upper cylinder E works a rubber pist-on, G, having the form of an inverted flat-bottomed cup, the bottom thereof being braced by upper and lower metal strengthening-plates G1 G2. Said piston is heldin place by upper and lower nuts Gr3 G4, which engage with screw-threads formed on said piston -rod C.

H designates a similar .but larger cup-shaped piston, facing the one above described, and provided with a metal stiffenin g base-plate, H1, and with a iiexible valve-disk, H2. Said parts H H1 H2 are heldin place by nuts H3 H4, which work on screw-threads formed in piston-rod C at or near its lower end. The bottom of piston H is provided with perforations h, which are extended through plate H1.

It will be observed that, by the above-described construction, the cupshaped pistons G and H can be adjusted on the pistonrod, so that they may be made to approach or recede from each other, thereby varying the amount of water raised.

Cylinders D and E are held together by small bolts passing through flanges d and e. Cylinder D is also provided with a flange, D1, which sets into grooves or recesses on the inside of casing A, and serves to hold the said parts D and A together. This object is further secured by an outlet-tube, I, which extends from the upper part of the cylinder D outward through said casing A. Said outlettube leads to a small reservoir, J, one side of which opens into an air-chamber, K. From the top of said reservoir J a vertical tube leads to a valve-chamber, L, the top of which is provided with a raised bent discharge-pipe, M.

In the outer side of cylindrical valve-chamber L is formed an inwardly-extending V- shaped valve-seat, L', inclosing a triangular space, l. The outer wall of said valve-chamber has a perforation, l1, communicating with space l, and the upper incline of said valveseat L is provided with a similar perforation, I?, which is adapted to be be closed by an inclined drip-valve, M. Said valve is pivoted to the upper part of said V-shaped valve-seat, and provided with a short extension, m, which overhangs the ridge or vertex thereof.

The casing of chamber or reservoir J is provided with side plates or lugs J1 J1, which form, with a bent rod, J2, screw-threaded at each end and suitable nuts, a clip for holding said reservoir and its attachments to casing A. Discharge-pipe M is held to said casing, and braced by a bent fastening-plate,M2. Additional clips may be used, if desired, to hold the various parts ofthe apparatus together.

The operation of the above-described devices is as follows: When rod G descends, water is forced up through piston H (raising valve H2) into the space between pistons G and H, while at the same time the said piston G operates to force water out of said space through tube I. On raising rod C valve H2 closes and the water in the said space is raised by piston H and partly forced thereby through said tube I, The pump is thus double-acting.

While the upward flow continues the dripvalve M1 is kept closed by the pressure of the water against the under side of extension m. But when the said How ceases the said valve opens, by the pressure of thedownward-tlowing water on the top ot' said extension and by its own weight, and it allows the water remaining above it to drip down through perforations l1 l2, and thus escape from the pump. This prevents all injury arising from freezing, and especially keeps the discharge-tube of the pump unclogged by ice in winter-time.

By constructing my pistons G and H of rubber I insure a [it between them and the cylinders in which they work, irrespective of atmospherie changes, which so often impair the usefulness of wooden pistons. I may, however, substitute leather or other flexible material for rubber in said pistons. I may also curve their bottoms instead of making,r them dat, as shown, in which ease the metal stil'eningplates must be curved also. Various other changes of form and arrangement may be made Without departing from the spirit of my invention.

What I claim as new, and desire to obtain by Letters Patent, is

1. The ilexible cup-shaped piston G, provided with metallic plates GI GrZ and nuts Gra G4, in combination with the flexible cup-shaped piston H, provided with the perforated metal plate H1, valve-disk H2, nuts H3 H, and screw-threaded pistonrod C, whereby the pistons can be adjusted on the rod relatively to each other, substantially as described.

2. Drip-valve M1, provided with extension m, in combination with valve-seat L and valve-chamber L perforated at l1, substantial- Iy as and for the purpose set forth.

In testimony that I claim the above I have hereunto subscribed my name in the presence of two witnesses.

WILLIAM N. STARR.

Witnesses WILLIAM OsBoRN, P. S. GRossoU'r.

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