US61758A - James p owell - Google Patents

Description

@uiten ttstrs @anni @titre JAMES POWELL, on CINCINNATI, 0R10.

'Lam-S Panni No. 61,753, (zml-z .mommy 1867.

IMPROVEMENT IN .GLOBE-VALVES.'

TO WHOM IT MAY CONCERN:

Beit known that I, JAMES PownLL, of Cincinnati, Hamilton county, Ohio, have invented a new and useful Improvement in Globe-Valves endl do hereby declare the following to be a full, clear, and exact description thereof, reference being had to the accompanying drawings, making a part of this speciiication. i

My improvement relates to that class of cocks known as globe-valves, in which the valve proper has a flexible attachment to its stem,'so as to be capable of self-adjustment to the seat, and my invention consists in a' provision wherebysuch valve, when worn unequally, can be reground to its seat, through the instrumentality of its stem. In the ordinary globe-valve or'cock, employing a self-adjusting valve, no provision has been made for grinding or regrinding it in connection 'with the stem, and when such a valve has required regrinding, it has been customary to separate the valve-disk from the stem by unscrewing it, and to attach it'rigidly to :tt-temporary handle or plug, so as to enable the operator to clumsily grind it to a bearing. It'is obvious that such construction of the valve and stem necessarily involves imperfect workmanship, and great dic'ulty in preserving the` common axis of the valve and stem so as to'insure a tight joint, and to prevent the leakage of steam or other fluid. v Whereas globe-valves made on my plan are readily ground or regronnd to `a perfectly accurate bearing, without'the trouble and delay of separating the valve from its stem. In the accompanying drawing--` Figure 1 is an axial section of a globe-valve, embodying my improvement.

Figure 2 is an axial section of the -valve proper, at right angles to the above.

Figure 3 shows by side elevation a modification of my improvement; and

Figure 4 is a horizontal section of the same at the line X X.

The body A, g. l, of the cock has a neck, B, having a smooth cylindrical interior, b, and a screw-threaded exterior,.b, which exteriorreceives the interiorly screw-threaded hub, cup, or chamber C c, which hub is surmounted by a customary stniing-box, D. The valve-*stom E is provided with guide-wings or bearings, F, adapted'to fit and slide within the cylindrical interior of the neck, as described in the patent granted to me on the second of May, 1865. The lower eild of the stem E is sov constructedthat a 'shoulder or enlargement is vformed. by a ring, G, sprung into an encircling groove in the stem, which engages with the diminished or contracted opening of the plug H, and prevents the plug from slipping ofi'. The plug H is screwed into the upper face of the disk or valve proper I, just so far as,- while permitting free vibration of the disk with reference to the stem, and unobstructed rotation of ,the latter, to at the same time preserve the disk from undue looseness or lateral play. The under side of the plug H is chambered out, of sufficient depth and diameter to enclose the spring-collar G, and thus prevent the possibility of the displacement of the collar.` The stem terminates in a swell, 'e, which, when the said stem is depressed, bears solidly upon the upper side or back of the disk. The plug H has a notch or cavity, J, which, when it is desired to unite the stem and valve so as to revolve together, receives the tongue of the lock-piece K, which piece has a slot, c, to receive a set-screw, L, by which the piece K is secured, either in or out of lock with the valve. The lock-piece K is of such width as just to lill the space betn'eentwo of the guide-wings, so"tl`1at it may be braced sccurelywhile performing its oi'n'ce. Theend of the pin 6r' tongue is diminished at -its lower end, so as to readilydrop into the cavity or opening in the valve g and the. set-screw-bein`g tightened,'the lockpiece carries the valve around with the stem. When it is desired to grind the valve lto its seat, the cap is unscrewed as in the drawing, and the valve is momentarily withdrawn; the set-screw L, being then loosened so aslto allow the tongue of the lock-piece to drop into the cavity of the valve, is again tightened. Sand, powdered glass, or other suitable abradant being then applied, the stem and valve are restored to their places and rotatedalternately to the right and left with a downward pressure. The grinding having been accomplished, the valve is withdrawn once more, to restore the lockpiece to its upper or inactive position,-and then returned to its place in the body, and the cap screwed home again, when it is'ag'ain 'it for use; but I do not confine myself to the precise arrangement here selected for illustration, as a lock-piece substantially as above may be employed in various ways; for example, the guide-wings ma'y form part of af loose collar, F', (see figs. 3 and 4,) which collar may have a tongue, K', which permanently occupies the cavity o f the valve. In this form, the locking and unlocking are accomplished by simply tightening and loosening of the set-screw L. The point of said set-screw entering a circumferential groove in the stem, serves the twofold purpose of tightening, as above, and being slackened of holding the collar F to its place when out of lock. I

ansi

am aware that it is common to construct valves haring a loose disk, but I know of no instane in which a. loose disk valve has ever been constructed with a: provision for rigidattachment of the valve-stem, so as to be carried around with thelatter in the act of grinding.

I claim herein as new, and o'fmy invention- 1. In the described combination with a. valve-stem adapted to maintain an axial position, independently of its screw, and provided with a. Seli-adjusting valve, I claim the locking-peee K, or its equivalent', adapted t0 operate as set forth. z y

2. "I claim, in the deseribed combination, the following elements, to wit: a. valve-stem, having guides for preserving its axial position -when released from the sorew-cap; n. self-adjustingvalve, and the tongued and adjustable piece K, adapted to enter the cavity J in the vulve, and to be secured either -in or o'ft of lock, 'substantially as and for the purpose set forth'.

3. The loose 'guide-collar F and K which permanently occupies a. cavity in the vulve, and is secured in or out of lock by a set-screw, 6, in the manner described.

In testimony of which invention I hereunto set my hand.

' JAMES POWELL.

Witnesses:

GEO. H. KNIGHT, JAMESH. LAYMAN.

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