US715266A - Valve. - Google Patents

Description

Patented Dec. 9, i902. W. HESTN.

VALVE.

(Application led Apr. 4, 1902.)

A(Nn Model.)

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www# mi "cams PErERS to.. mom-uhm.. wAsmNGToN. n. cA v NIIED STATES WILLIAM HESTON, OF HOMESTEAD, PENNSYLVANIA.

i ATENT OFFICE.

VALVE.

SPECIFICATION forming part of Letters lPatent No. 715,266, dated December 9, 1902.

Application filed April 4, 1902. Serial No. 101.366. (No model.)

To (LZ whom, t nifty concern:

Be it kn own that I, WILLIAM HnsToN, a citizen of the United States, residing at Homestead, in the county of Allegheny and State of Pennsylvania, have invented a certain new and useful Improvement in Valves, of which the following is a full,clear,and exact description, reference being had to the accompanying drawings.

The object of this invention is to provide a multiple-way valve with very simple and efficient means for lirmly seating the plug in the casing at each of its active positions. In accomplishing this I have provided a valve with a casing and plug and exterior cam-surfaces for seating the plug, combined with a very simple means for taking up the wear to insure proper seating at all times.

The invention may be best summarized as consisting of the combination of parts to the above end herein shown, described, and claimed.

The drawings clearly show my invention as applied to a four-way cock.

Figure lis a vertical central section through the same. Fig. 2 is a side-elevation at right angles to Fig. l. Fig. 3 is a plan. Fig. -l is a horizontal section through the passages of the casing, and Fig. 5 is a side elevation of the cam-yoke.

Referring to the parts by letters, A represents the casing, which in the form shown has four passage-ways (designated l, 2, 3, and 4) threaded to receive pipes and leading to the inner conical cavity o.. In this cavity seats the plug B, which has passage-ways b' and b2 through it for the purpose of connecting the passage-ways in the casing.

C represents the operating-handle,engaging a square portion b4 of the shank b3 ofthe plug. Fig. a indicates by broken lines the position of the operating-handle. When it is in line with the passage-ways l and 2, the valve is shut of. When it is between the passageways 2 and 3, these passage-ways are connected together by the passage b2, and likewise the passage-ways l and Il are connected by the passage l1'. When the handle is between the passage-ways 2 vand 4, these passage-ways are connected and also the passageways l and 3.

The valve shown herein is adapted for the various purposes for which the four-way cock may be employed-as, for example, in the operation of hydraulic elevators. In such application and in many others it is essential that there be no leakage around the plug when it is in either active position. The most satisfactory way to accomplish this is to force the plug end wise more snugly into its seat by means of the cam-surfaces as it comes into the final positions. Now these cam-surfaces have heretofore been provided within the valve-casing; but in such cases it is very inconvenient to take up the wear, nor are the wearing-surfaces visible for correction. In the present invention I have provided an arrangement of cam-surfaces outside of the valve-casing, so that the operator may always be able to see what service the cams are giving and may very conveniently take upy the' is in the vertical plane corresponding to the off position of the lever O. This lever projects in each direction` from the shanlr` b3 of the plug and engages the under surfaces of the ring D at diametrically opposite points. The ring D is firmly held onto the casing by screw-bolts E, lying within vertical recesses d in the posts d, preferably formed integral with the ring. A nut F, screwing onto the shank b3, adjusts the position of the lever O, and thereafter the nut is jammed by turning down the screw G, screwing into the upper end of the shank b3 and having a washer G' bearing on the upper surfaces of the lever O.

From the above-described construction it follows that whenever the lever O is turned from the off position in either direction the plug B is formed into the casing, ,rmly seating itself. As the plug wears the screw G may be loosened and the nut F turned upward to take up the space between the lever and the yoke-ring, so that the plug will always come into its snuggest position with the passage-ways b b2, properly alined with the ports of the casing.

In the upper portonof the casing is a flange IOO a', screw-threaded internally, and into this screws the member H of the stuffing-box, this member being also internally threaded and receiving the threaded thimble H', which compresses the packing H2 between the two members. This arrangement of the stuffingbox is not only very efficient in properly packing the shank b3, but it obviates the necessity of having a ground joint-head to the casing secured by numerous bolts, as has formerly been done. Moreover, the packingbox may be removed entirely and the yokeframe D replaced and the performance of the valve observed while in operation. This is a matter of importance in testing the valves.

I claim- 1. The combination ofa valve-casing,a plug occupying the same and having a stem extending upward therefrom, a ring carried by the casing, a lever on said stem beneath the ring, said lever engaging said ring at points on both sides of the stem, said ring being inclined on its under surface, substantially as described.

2. The combination of a four-way valvecasing, a tapered plug occupying the same and having passage-ways through it, a ring carried by the casing, a lever secured to the stem of said plug and engaging the under side of the ring, said ring inclining downward on the under surface of each side in each direction from the off position of the lever, substantially as described.

3, The combination of a valve-casing, a tapered plug occupying the same, a stem extending upward from said plug, a ring, a pair of diametrically opposite posts for supporting the same above said casing, a lever onthe stem of the valve engaging the under side of said ring at diametrically opposite points,said under side being inclined, substantially as described.

4.-. The combination of a valve-casing,a plugA occupying the same,a stem extending upward from said plug, a ring supported above said casing, a lever on the stem of the valve engaging the under side of said ring, said under side being inclined, and means for adjusting the position of said lever, substantially as described.

5. The combination of a valve-casing, a tapered plug occupying the same, a stem extending upward from said plug, a ring, posts for supporting the same above said casing, a lever on the stem of the valve engaging the under side of said ring, said under side being inclined, and a nut screwing onto the stem of the valve for adjusting the position of said lever, substantially as described.

6. The combination of a valve-casing, a tapered plug occupying the same, a stem extending upward from said plug, a ring, a pair of diametrically opposite posts for supporting the same above said casing, a lever on the stem of the Valve engaging the under side of said ring, said under side being inclined, said posts being formed integral with the ring and having vertical recesses in them, and screwbolts occupying said recesses and taking into said casing, substantially as described.

7. Thecombination ofavalve-casing,a plug within the same,a stem for the plug, a stuffingbox for the stem consisting of two members, one screwing into the other, thevalve-casing having a flange internally threaded, in which the outer member of the stuffing-box screws, a yoke secured to the casing outside of the stufflngfbox, and a cam arrangement on the under side of said yoke for forcing the plug to its seat, substantially as described.

8. The combination ofavalve-casing,aplug within the same, astem for the plug,a stuffingbox for the stem consisting of two members, one screwing into the other, the Valve-casing having a ange internally threaded, in which the outer member of the stuffing-box screws, a yoke secured to the casing outside of the stuffing-box, said yoke being in the form of an annular ring inclined on its under surface, and a lever engaging the stem of the plug and engaging the under surface of said ring on opposite sides of the stem, substantially as described.

9. Thecombinationofavalve-casing,aplng within the same, a stem for the plug, a stuffingbox for the stem consisting of two members, one screwing into the other, a yoke secured to the casing outside of the stuffing-box, said yoke being in the form of an annular ring inclined on its under surface and having supporting-posts and a lever engaging the stem of the plug and engaging the under surface of said ring on opposite sides of the stem, and a nut screw-threaded onto the stem and engaging the under surface of the lever to adjust it to take up wear, substantially as described.

In testimony whereof l hereunto affix my signature in the presence of two witnesses.

WILLIAM HESTON.

Witnesses:

ADAM WOLTFARTH, M. E. BALDWIN.

ICO

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