US266566A - peters - Google Patents

Description

`(No Model.) 2 Sheets-Sheet 1. T. H. WARD.

PUMP. No. 266,566. Patented 0011.24, 1882.

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(No Model.) 2 Sheets-Sheet 2:.

T. H. WARD.

PUMP.

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Usare STATES THOMAS H. \VARD, OF TIPTON, COUNTY OF STAFFORD, ENGLAND.

PUMP.

SPECIFICATION forming' part of Letters Patent No. 266,566, dated October 24, 1882.

Application lcd November lll, 1981.'I (No model.) Patented in England April 14, 188i, No. 1,650.

To all whom it may concern Beit known that I, THOMAS HENRY WARD, ofthe firm of Howl, Vard & Howl, a subject ofthe Queen of Great Britain, and a resident of Tipton, in the county of Stafford, England, have invented certain Improvements in Pumps, (for which I have obtained British Letters Patent No. 1,650, dated April 14, 1881,) of which the following is a specification.

My invention relates to improvements in the valves and valve-boxes of pump-cylinders, more especially ofthe water-cylinders of steampumps; and my invention consists in certain improvements in the construction of these valves and boxes, as more fully described hereinafter.

In the accompanying drawings, Figure l is a longitudinal section ot' a steam-pump containing my improvements; Figs. 2, 3, 4, 5, and 6, transverse sections on the lines l 2, 3 4., 5 6, 7 S, and 9 l0, respectively, Fig. l; and Fig. 7, Sheet 2, an enlarged sectional View of my improvedvalve.

The valve-box F, which is preferably cylindrical, contains all the valves common to the pump-*for example, two suction-valves, I I, and two delivery-valves, K K, in a doubleaction pump. This box is open at both ends. The valves are of the type known as pistonvalves,7 allowing the water to iiow round their peripheries when open. Annular projections m are cast in this box and bored out, so that when its valves are closed they tit inside the same. At each end of this valve-box a lid, n, is provided, by preference situate and bedded in a recess. These two lids are tied together by means of a central bolt, 0, which bolt serves also as a guide to the several piston-valves I I K K. All four of these valves, when in their normal positions, bear against nuts or collars '1), tixed on the central bolt, preferably provided with intervening cushions, g, ofrubber or other suitable material, and the pressure of the water on these valves is thereby transmitted to and carried by the outer covers, n, which are tied together by the bolt o. India-rubber or other suitable cushions, r, may also be provided between these covers and the nuts on the opposite ends of the bolt. In the pump shown in the drawings the collars p are tixed on the bolt 0 by means of intervening tubes, 6, and springs rv are provided for returning the valves to their normal positions. Flaps s, of leather, rubber, or other suitable material, are secured to the back of these valves, so as to overlap thejoints between the valves and their annular projections, as shown in Fig. 7, in order to prevent excessive leakage, so that the valves and the openings through which they pass may tit easily and need not touch, and consequently facing or grinding of the valves and seats is dispensed with, since the leathers complete the closure and are comparatively noiseless in work.

The valve-box is, by preference, cast, together with the ports and cylinder, in one neat and symmetrical casting, as shown in Figs. l, et, 5, and 6, in which case the distance between the outer casing or walls, t, and the walls u ot' the cylinder Gr and ports serves as a suctionchamber. Through this chamber the water is drawn from the passage V into the valve-box F,vpassing through the suction-valves I I alternately into the cylinder, and at the returnstroke out of the cylinder again through the delivery-valves K K alternately into the rising or delivery main IV.

The valve-boxes may be cast separate from the piston or plunger pumps, whether single or double action, and may be cast open at one end only, instead ot' at both ends, it' desired.

By means oi' the arrangement hereinbefore described the central bolt serves as a guide to the valves, as a tie-rod to the cover or covers, and as a tension-rod carrying the loads of all four of the valves.

Any desired construction of steam cylinder, engine, or other mechanism may be employed to operate the piston of the water-cylinder. In Figs. 1,2, and 3 I have illustrated one form which may be used, and which may be briefly described as follows:

A is an ordinary slide-valve, which is actuated by the piston B at each end ot' its stroke in the cylinder E in the following manner, viz: From the slide-valve A extend slide-bolts C C at opposite ends to the respective ends ot' the cylinder. The ext-renie ends of these bolts are beveled oft on the inside, as shown at et a, and at each ot' these ends a small sliding bolt, D, is arranged at or about right angles to the bolt C, and consequently to the path of the piston, the said bolts D having corresponding bevels, b c, at their opposite ends, and also be- IOO bolt, which carries the valve A with it, the

valve in its turn impelling the otherrbolt (.f

and forcing down the corresponding small bolt D at the other end, ready for its being acted on by the piston at the return-stroke. I wish it to be understood, however, that I d'0 not desire to claim this steam-cylinder valvegear, as it will form the subject of a separate application, as will also the construction of stufng-boxes shown in Fig. l, and which therefore need not now be described.

I claim as my inventionl. The combination of the valve-box, covers, and set of piston-valves having overlapping aps s, with annular projections m and a 1ongitudinal rodconnecting said covers and guiding the valves, substantially as described.

2. The combination of the valve-box, covers, and set of piston-valves with rod o, tubes 6, and collars p.

3. The combination of the valve-box, covers, and set of piston-valves with valve-seats, a longitudinal rod connecting said covers and guiding the valves, and springs for the valves and cushions 1", substantially as described.

.In testimony whereot'I have signed myname to this specification in the presence of two subscribing Witnesses.

THOMAS HENRY WARD.

Witnesses:

J onN M. DIcKINsoN,

Park Road, Sutton Ooldjelcl. EDMUND HowL,

The Quarries, Nr. Dudley.

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