US123311A - Improvement in valve-cocks - Google Patents

Description

JAMES WALSH. y

' Valve Cock. a

A Patented Jan. 30, 1872.

FIGJ.

JAMES WALSH, OF PHILADELPHIA, PENNSYLVANIA.

IMPROVEMENT IN VALVE-COCKS.

Specification forming part of Letters Patent No. 123,311, dated January 30, 1872.

Specification describing an ImprovedValve- Cock, invented by JAMES WALSH, of the city and county of Philadelphia, State of Pennsylvania.

My invention consists of certain improvements, fully described hereafter, in valve-cocks, the said improvements having been designed mainly with the view of obtaining steam and water tight joints without the aid of any elastic packing, of reducing the cost of the cock, and of enabling the whole of the working parts to be readily removed from the casing for purposes of cleansing or repairs.

1n the accompanying drawing, Figure 1 is a sectional view of my improved valve-cock; Fig. 2, the same, showing the valve raised from its seat Fig. 3, a view, showing the several parts detached from each other; Fig. 4, a sectional plan on the line 1 2, Fig. 2; and Fig. 5, a perspective view of the screw-cap with its recesses or guides for the valve.

A represents the valve-casing B, the inlet branch O, the outlet-bran ch or nozzle; and D, the valve, the latter having a semi-spherical lower end, a, adapted to a similarly-shaped seat, a, formed at the bottom of the casin g, immediately over the opening I), through which communication is established between the supply-branch and the interior of the said casing. The valve does not turn in its seat, but has simply a rising-and-falling motion, it being provided on opposite sides with wings d d adapted to recesses or guides e 6 cut in the cap F, which is screwed into the top of the casing. (See Figs. 3, 4, and 5.) By thus guiding the valve I am enabled to construct the casingwith a perfectly-plain interior, as shown in Fig. 3, instead of with the usual internal ribs adapted to the wings of the valves. This, it will be evident, considerably reduces the cost of the said casin g, both in casting and finishing. The same effect might be attained by reversin the above and adapting projections formed at the lower end of the screw-cap to recesses cut in the valve. The screw-cap F is made of considerable depth, and has a threaded opening in the center, into which is screwed from the top a plug, Gr, the latter serving as a guide for the operating-rod H, and also as a means of regulating the pressure of a spring, f, upon a supplemental valve, g, secured to the operating-rod and adapted to a ground seat formed in the lower portion of the cap. Below this supplemental valve the operating-rod is re duced so as to form a square or oblong stem, H, adapted to a similarly-shaped opening in a flanged sleeve, J. The latter has upon its exterior a coarse left-h anded screw-thread adapted to a corresponding internal thread cut in a central vertical opening in the valve D, and into which the said stem is fitted. (See Figs. 1, 2, and 3.)

0n turning the rod H in one direction the sleeve J will be withdrawn from the threaded opening in the valve D and the latter will be consequently forced into its seat; and, when the said rod is turned in the opposite direction, the stem will be screwed into the valve, when the latter will be lifted from its seatin order to permit the passage beneath the same of the steam or water.

It is necessary, in order to prevent the disk 9 from beinglifted from its seat, that the stem H should fit loosely into and have a slight longitudinal play in the sleeve J but the latter may, ifdesired,be attached loosely to the lower end of the said rod in order to insure the raising of'the valve D.

As the operatin g-rod H is simply turned without being raised or lowered its disk-valve g will always be maintained in its seat, and will effectually prevent leakage without the aid of any elastic packing, the use of which is so objectionable in connection with steam or hotwater cocks.

The screw-plug G enables any desired degree of pressure to be brought to bear upon the spring f and disk 9, so that the latter, even after it becomes considerably worn, can be held firmly and tightly in its seat.

Another advantage of my improved cock is that after simply unscrewing the cap F the whole of the parts can be bodily removed from the casing, as shown in Fig. 3, so that access can be readily obtained to any or all of the said parts for purposes of cleansing or repairs.

The several parts of the cock can be made of any suitable metal, or of hard rubber or other material.

I claim as my invention- 1. The operating-rod H, carrying a disk, g, adapted to a ground seat on the cap F, in combination with the threaded sleeve J, operated 3. The screw-cap F, having projections and by the reduced portion H of the said rod, and recesses for guiding the valve, as described.

arranged to raise and lower the guide-valve D In testimony WhereofI have signed myname without exerting any upward pressure on the to this specification in the presence of two subvalve g, all substantially as specified. scribing witnesses.

2. The combination, with the cup F, of an WVitnesses: JAMES WALSH. independently-adjustable screw-plug, G, as M. A. STEEL,

and for the purpose set forth. J NO. B. HARDING.

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