US384906A - Henry hall - Google Patents

Description

(No Model.)

H. HALL. STRAIGHT WAY STOP VALVE.

Nof 384,906. Patented June 19,` 1888.

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UNITED STATES PATENT OFFICE.

HENRY HALL, OF LANSINGBURG, NEW YORK, ASSIGNOR TO THE RENS'` SELAER MANUFACTURING COMPANY, OF SAME PLACE."

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SPECIFICATION forming part of Letters Patent No. 384,905, dated J une 19, 1888l `Application filed July '1, l887. Serial No. 243,683. (No model) To @ZZ wzmn, it 77mg/ concern:

Be it known that I, HENRY HALL, of Lansingburg, in the county of Rensselaer and State of New York, have invented vcertain new and useful Improvements in Straight-Way Stop-Valves; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, andto the letters of reference marked thereon,which form part of this specification, in which- Figure l represents a central vertical section through. my improved valve. Fig. 2 is a transverse vertical section of the same on line m x, Fig. 1. Fig. 3 is a view of one of the gates. Fig. 4 is a perspective view of one of the Wedge-arms.

This invention relates to improvements in valves provided with sliding gates; and it has for its objects to improve the valve shown and described in 4my Letters Patent` numbered 330,322, dated November 10, 1885, and its 0bjects are to strengthen the actuating parts of the valve, and also to cheapen its construction and better insure the closing of both gates. To these ends the invention consists in the improved construction and arrangement of parts hereinafter described, illustrated in the accompanying drawings, and particularly specified in the appended claims.

I will first briefly describe the general features of the valve, which are the same as those shown in my aforementioned patent,and therefore do not require a detailed description.

Referring to the drawings by letter, A designates the casing of the valve, T-shaped and provided with ports A A', and the guideways a, which stand at right angles to said ports and extend through the stem of the valve-casing.

B designates the valve-stem casing, fitted onto the stem of the valve proper, and in which is secured the valve-stem C in the usual manner, so that it can rotate freely, but not move in other direction therein. This stem C is provided outside its casing with the usual hand-wheel, c', as shown.

D designates a threaded sleeve or nut placed on the correspondinglythreaded end of the stem C, within the stem of the valvecasing proper, so that it is reeiprocated longitudinally within said casing when the valve stein C is turned. This nntD is provided on its lower end with a rectangular iange, d.

E E designate the gates, preferably circnlar in form and having the cutting-edges e e on their edge farthest from valve stem C. These gates areidressed on their outer faces to tit snugly against the inner dressed surface of the ports A A', as shown and described in my aforementioned patent. Th'ese gates E E are provided on their inner surfaces Withthe projection F, having the longitudinal semicireular groove j' and transverserecess f', and the groovesff of the oppositely-facing gates E E receive the lower end of nut D, and its annular Bange d is seated in the recesses f f ofthe gates, so that when properly arranged the recessesf f` of 4the gates prevent the rotation' of nut D, and the gates are in turn caused to reciprocate with said nut in casing A. The projections F F of each gate are beveled on their inner ends, forming inclined faces f2,

and on the other side of each of said projections, at the baseof said inclines f2, are formed the shoulders f ,hereinafter referred to.

All of the foregoing parts are formed simil lar to and operate like the corresponding parts l in my patent, numbered 330,322, referred to. I will now proceed to describe my improvements.

a designates a stop rib or lug formed in the bottom of casing A, opposite the stenreasing B, situated centrally between ports A and extending about half-way around the inner circumference of the casing A, as shown.

G G designate short independent but similar arms, which are employed to separate the Vgates E E, so as to keep them in proper working posit-ion. Each of these arms G is recessed, as shown at g, on its inner face, forming at their lower ends the shoulders or hooks g' g', which are adapted to engage withthe shouldersf3 of t-he gates E, the recessed portions g3 of the arms corresponding in length to the length of the sides of lugs F, below shoulders f3, as shown. The upper ends, g, of pieces G are thickened, as shown, to form secure seats for wedges H, hereinafter described.

In order to prevent the sidewise escape of arms G from between the gates when in use, I

form the narrow upstan'ding flanges e on the inner faces of each gate to the outside of the inclined portions f2 of projections F, which, when the parts areY in position, embrace the outer edges of arms G G and keep said arms in position, as evident. I also employ narrow outstanding flanges e, which are formed on the inner edges of inclines f2, as shown, the top edges of said tlanges'bein-g on a line with the faces of projections F, as shown, and which are hereinafter referred to.

When the gates and arms G are in proper working position, the arms G G lic between and are embraced by the flanges c and projections c2 of opposite gates, and'thelower portions of the arms G are adapted to engage against the stop a when the gates are down or closed.

H H designate triangular wedges, which are placed between the inclines fZ ot' opposite gates, and are held thereon by the flanges e2 and by the arms G, as shown. The gates when reciprocated move in the ways a, and are thus held in sufficiently close relation with each other to prevent the escape of the arms G or wedges H H. f

The operation of the device is as follows: The stem C being turned will cause the sleeve D, and through it gates E E and their attending` parts, to reciprocate. Vhen moving inward, the lower ends of arms G G will engage against the opposite end ot' lug aand keep the arms stationary, while the gates can be moved still farther inward. This movement of the gates causes the wedges H H to come into play. Said wedges, being held by abutting against the parts g' of arms G, ride upward on the opposite inclines f2 f'z of the opposite gates E E, and canse the forcible separation of the gates, causing the latter to seat themselves firmly and tightly against the inner faces of ports A", as is evident.

In practice I have found that it is very difeult to make the bar G ot' my patent sufficiently strong to be reliable in large valves, and it is also difficult and expensive to manufacture; but by employing the separate and independent arms G, as Yherein shown, and giving them both an independent bearing on a stop-lug in casing A, I not only cheapen the cost of the valve, but I insure its effective working and sufficient strength to stand the severest strains, and also lighten the valve, which is quite an advantage where verylarge valves are required, because this extra weight on the wedges causes the gates to abrade always against the ways a as well as the valve, which abrasion will not be sufficient to hinder the quick movement of the parts, yet in time wears out the surface of the gates and causes the valve to leak, necessitating the re-dressing of their faces. Another advantage of the present valve is that the bearing-points ofthe arms G when the valve is closed are not upon the central part of the casing A, which is obviously its weakest portion, butare transferred to the opposite sides thereof when being closed. rlhe arms G G being independent, should one side ofthe valve-ports be worn, so that the gates would bind on the opposite side first through one arm G, there will be suffi;Y cient play of the parts to allow the valve-stem to be turned until the opposite arm G is engaged, thus securely closing the valve-ports by reason of the independent action ot' the arms G and their wedges, which could not be done in my patent referred to for the reason that the arms being rigidly connected in said patent, the binding ot' one would similarly stop the action of the other, as is obvious.

In some cases the wedges H H may be cast integral with the arms G, with which they cooperate, their action not being effected thereby; but I prefer forming them separate, as described, when the valve is to be employed in an inverted position, or with the stem lowermost.

Having described my invention,what Ielaim 1s- In a straightway stop-valve, the easing A, its opposite ports, and stop-lug c between said ports, and the valve-stem casingB', valvestem,and angularly-flanged nutplaying on said stem, in combination with the oppositely-facA ing gates E, hung upon the angular flange of said nut, having pairs of oppositely-facing inclines]c2 on their inner faces, lianges e2 to the inside of said inelines, fianges e to the outside thereof, and shouldersf, the independent recessed arms G G, hung between gates E E on the shouldersf thereof, and lying between the flanges e and inelines f2, and the wedges H H, placed in the recesses of said arms and engaging the inelinesf2 of the opposite gates, all substantially as and for the purpose described.

In testimony that I claim the foregoing as my own I affix my signature in presence of two witnesses.

HENRY HALL.

Wi tn esses:

JAMES I. EDDY, ELLIS L. Bowls.

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