US534004A - Straightway valve - Google Patents

Description

(No Model.)

n J. PUWBLL. STRAIGHTWAY VALVE.

No. 534,004. Patented Peb. l2, 1895.

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JAMES POWELL, OF AVONDALE, OHIO.

sTRAiGl-ITWAY VALVE.

SPECIFICATION forming part of Letters Patent No. 534,004, dated February 12, 189.5.

Application filed May 21, 1894. Serial No. 511,923. (No model.)

To @ZZ whom, it may concern.-

Be it known that I, JAMES POWELL, a citizen of the United States, residing at Avondale, in the county of Hamilton Vand State of Ohio, have invented certain new and useful Improvements in Straightway Valves; -and I do hereby declare the'follovvingy to be a full, clear, and exact description of the invention, reference being had to the annexed drawings, which form part of this specification.

This invention relates to those straightway valves which include a pair of disks loosely coupled to a vibrating lever operated by a rock-shaft having an external handle,and my improvement comprises a novel combination of devices which compels such disks to be held very firmly against their seats when the valve is closed.

It has been customary, heretofore, in valves having disks operated by a swinging lever and rock-shaft, to construct the sides or walls of the shell or casing with a curve or bulge, corresponding to the radial sweep of the lever and its accompanying valve-disks, in the act of opening or closing the valve, said curvature being determined by the length of traverse andthe distance between the axis of the vrock shaft and the opposite edges of the valve disk. This construction necessitates considerable space Within the shell or casing, thereby rendering it bulky and unsightly, and adding materially to the cost of manufacture. l

In my improved construction, Idispense` entirely with this objectionable bulge or curve,

and makethe Walls parallel with each other, thus reducing the sizeand Weight of the valve-body, or shell, and adding very much to the appearance of the same. Furthermore, this improved construction compels the Valve disks to be held firmly against the shell, when closed, While, at the same time, they can be readily moved from a closed to a wide-open position with very little friction. This result is attained by an improved and I'novel construction of the actuating lever which carries the valve disks; said improvement consisting of a longitudinal slot or groove inthe lever which groove receives the studs or pivots of the valve-disks, in order that said pivots may traverse said groovein the actof opening and closing the valve. f

Another important feature of my improved construction is the rotating eect produced,

on the valve-disks inl the actl of opening and disks' and their respective seats and insuring Va perfectly tight joint.

In Letters PatentfNo. 409,334, issued August 20, 1889, I have shown and described a peculiar form of expansionplate for closing a pair of disk-valves carried by a verticallyacting stem; but by a slight modification ot this plate l enable it to operate with a pair of valves loosely coupled to a vibrating lever.' Consequently, the utility of said device is greatly enhanced, without deviating from the spirit of my invention, as hereinafter more fully described. v

In the annexed drawings, Figure l is a vertical sectionof astraight-Way valve embodying my present improvements, said section being taken in the plane ofthe vibrating lever, andthe water-Way closed. Fig. 2 is a horizontal section of the valve taken at the line Z-Z of the preceding illustration. Fig. 3 is a plan of the valve, the cap being detached from the shellor casing. Fig. 4 is an illustration including YVa vertical section, a

side elevation, and ahorizontal section ofthe expansion plate.

of a modification of the invention,

The shell or casing A of the cock 'may be `of any desired size, shape and material, and

is provided with the customary pipe-ends B, B', traversed by straight Water-Ways b, b', which latter `are axially in line Witheach other. Situated betweenthe'sepipe connections isa Valve chamber Celos/ed at top by a readily-detachable cap D, from whose under vvside a stop d projects, for a purpose that will presently appear.

E, E', are annular seats near the bottom of chamber C, and F, F', are the' disk-valves adapted to close against said seats, the inner, or non-eective vfaces of said valves, being provided with short pivots f,f, adapted to travel freclywithin a longitudinal slot g of lever G. The free end of said lever vibrates up and 'down within the chamber C, which movement is eected by providing the other end of the lever with an eye g through which Fig. 5 isasectiouized plan IOO is passed the square h, of a rock-shaftH, which latter, after passing through a stuffing-box I, has an external handle J attached to it.

Chamber C has guides K, K', that confine the valves F, F', to a proper path, and, in addition to these guides, said chamber has grooves L, L', the latter being designed for the reception of a bodilydetachable expansion-plate, the peculiar features of which are more clearly seen in Fig. 4. Reference to this illustration shows that said plate has, at bottom, a semi-annular portion, or half ring M, of the same curvature as the bottom of chamber C, and that a vertical-tongue N projects from one end of said half-ring. n is a perforation near the top of this tongue to receive a screw n', wherewith the expansion plate is secured in the shell, so as to have a limited movement therein, to compensate for expansion, or inaccurate fitting.

fm, m', are wedges at the ends of the halfriug M, which wedges are wider in front and at bottom than at rear and top. m" is another wedge that may be located at the center of said ring, if desired, but the omission of this third wedge from Fig. l shows that its use is not imperative.

In tting up this valve, the expansion plate must first be applied to the shell, which is readily done by dropping said plate down within the grooves L, L', and causing the tongue N, to enter the groove L,after which act, said plate is loosely held in place by the screw 7t,as seen in Figs. l and 3. The pivots f,f, of valves F, F', are then inserted within the slot g of lever G, and the latter is passed down within the chest C, care being taken to bring its eye g to such a position as to admit the square h, of rock shaft H. As soon as this connection is made, the free end of the lever, with its coupled valves, is allowed to drop down within the valve-chamber C, and when the cap D and stuflingbox I are secured in place, the valve is at once ready to be applied to a set of pipes for conveying steam or fluids.

Now, by referring to Fig. 2 it will be noticed that the pivotsjif, of the valves are not in Contact with each other, and therefore, each valve is capable of being indepen dently seated, which seating is effected by the inclined bearings m, m',wedging against the backs of said disks F, F. Consequently, these independently-seating valves effectually close the channels 11,19', of the shell, and thus prevent the passage of water, steam or other fluid,

To open the valve, it is necessary only to operate the handle J in such a manner as to swing the lever G up to the position indicated by dotted lines in Fig. l, and as soon as the free end of said lever strikes the stop d, the disks F, F', will clear the water-Ways t), b', the valves being confined to a proper path by theirlperipheries bearing against the guides K, K

In the modification of my invention, seen in Fig. 5, the lever-proper, G, is reduced in thickness near its free end, and has perforations `q-to admit pins g, that project laterally from a counter-lever G. 9 are longitudinal grooves in these levers G', G, to receive the pivots f of the valves F F". Mis a half-ring having wedges m" that force the levers apart when they are swung down to close the valves. In this construction it will be necessary to afford a slight lateralplay of the lever G', ou the rock shaft, to enable said lever to be shifted by the Wedges.

In my patent, previously referred to, the expansion Vplate has inclined bearings both above and belowthe center of the fluid ways, but in the present case I dispense with one set of wedges and arrange said expansion plate with single inclined-bearings or Wedges on opposite sides of the water or Huid-way. By this arrangement the essential feature of my old invention is made available in a new form of valve having a very great range of utility.

I claim as my inventionl. The combination, in a straight-way valve of a shell having a pair of channels; a cham ber provided with a pair of guides and two opposing valveseats; a vibrating lever whose free end swings within said chamber, and is grooved or slotted longitudinally; and a pair of valves loosely coupled to said lever; the arrangement of these devices being such as to confine said valves to a rectilineal path when the free end of said lever describes an arc of a circle, substantially as herein described, and for the purpose stated.

2. The combination,inastraight-way valve, of the shell A, having a pair of channels b, b'; a chamber C, provided with a pair of guides K,K two valve-seats E, E', and a detachable expansion-plate M, having wedges m, m; a vibrating lever G, whose free end swings within said chamber C, and is grooved or slotted longitudinally at g; and a pair of valves F, F',having pivots f,f, that traverse said slot; the arrangement of these devices being such as to confine said valves to a rectilineal path, within said guides K, K', when the free end of said lever describes an arc of a circle, all as herein described, and set forth.

In testimony whereof I affix my signature in presence of two witnesses.

` JAMES POWELL. Witnesses:

JAMES I-I. LAYMAN, ARTHUR MOORE.

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