US573656A - Valve - Google Patents

Description

(No Model.)

B. W. HILL, VALVE. No. 573,656. Patented Dec. ZZ,v 1896.n

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UNITED STATES PATENT OFFICE.

BURTON YV. HILL, OF SOMERVILLE, MASSACHUSETTS.

VALVE.

SPECIFICATION forming part of Letters Patent No. 573,656, dated December 22, 1896.

Application led January 23, 1896. Serial No. 576,515. (No model.) y

To all whom it mel/ zj concern,.-

Be it known that I, BURTON W. HILL, of Somerville, in the county of Middlesex and State of Massachusetts, have invented certain new and useful Improvements in Valves, of which the following is a specification.

This invention has for its object to provide a valve adapted particularly for use in connection with a steam-trap, which comprises a chamber mounted on tubular trunnions, one of which is connected with a steam and water inlet and the other with an outlet and with a valve, the chamber being weighted so that it normally stands in position to close the said valve, but when filled with water the chamber overcomes the weight and turns on its trunnions, thus opening the valve and permiting the discharge of water. A steamtrap of this description is shown in my application for Letters Patent of the United States, filed April 12, 1895, Serial No. 545,431, in

Vwhich application I show a plug-valve connected with the outlet-trunnion of the chamber and rotating in a fixed casing, from which the outlet extends.

My present invention consists in certain improvements comprising a valve adapted to be opened and closed by oscillating movements of a rotary conduit, such as the outlettrunnion of the trap above described, and to be closed more positively and with less liability to leakage than the valve shown in my above-mentioned application.

The invention consists in the improvements which I will now proceed to describe and claim.

Of the accompanying drawings, forming a part of this specification, Figure 1 represents a side elevation of my improved valve. Fig. 2 represents a longitudinal section of the same, the valve being opened. Fig. 3 represents a view similar to Fig. 2, the valve being closed. Fig. 4 represents a section on line 4 4 of Fig. 3.

The same letters of reference indicate the same parts in all the figures.

The casing of my improved valve comprises the body a, the tubular neck a at one end of said body, having a stuflng-box a2, and the tubular valve guide or nut a3 at the other end of the casing, said guide having an internal screw-thread a* and being connected with the body a by means of screws or bolts a5. The body a has an outlet or waste pipe a6, which may extend to any convenient point. lVithin the neck a of the casing is journaled a tubular conduit b1", which eX- tends through the stufng-box a2 and is adapted to rotate therein. The said conduit may be considered an extension of the outlettrunnion c of the steam-trap shown in my above-mentioned application, and is here shown as rigidly connected by a coupling c' with said trunnion, so that the conduit bm Will rotate with the trunnion. The conduit Z110 is provided at its inner end with an annular valve-seat b', which opens into the space within the body a of the casing and communicates through said space with the outlet a, so that when the said valve-seat is unobstructed water can flow from the trunnion c through the conduit Z210 and through the casing to the outlet a6.

CZ represents a valve which is formed to close upon the seat b'. Said valve is secured to a stem b, which has a screw-thread b2 engaged with the internal thread a4, formed in the guide a5. The stem b and valve d are connected with the conduit Z910 by a sliding connection, which imparts a rotary motion from the conduit to the valve and at the same time permits the valve to move toward and from the seat b'. Any suitable sliding connection adapted to operate as above indicated may be employed. I have here shown as such connection two pins or rods f f, affixed to a ange on the stem b and passing loosely through orifices b3, formed in a ange on the conduit Z210, said pins being parallel with the valve-stem and sliding freely in the orifices b3.

It will be seen that when the conduit 510 is rotated in the direction indicated by the arrow in Fig. 4 by the water-discharging movement of the chamber of the steam-trap, the casing being of course stationary, the valvestem 'b' will be rotated in the same direction and Will be caused, by the engagement of its screw-thread with the thread in the fixed guide a3, to move from the valve-seat and open the latter, as shown in Fig. 2, so that the water can escape freely through the conduit bw, the casing a, and the outlet a6. When IOO i the conduit bllfis rotated in the Opposite direction bythe returnumoverment ofthe chamber to its normal position after the discharge of the water, the valve is moved in the Opposite direction, thus closing on the seat, as shown in Fig. 3. I find that by moving the valve toward and from the valve-seat I obtain a more satisfactory result, there being much less liability of leakage, thus making the trap more efficient and more easily kept in Order.

In a device of the character specifiedthe rotation of the conduit Z910 must be much less than a complete one. Therefore in Order to fully open and close the valve the pitch of the screw-threads is steep.

rfhe valve d preferably has a somewhat loose or rocking connection with the stem b by means of a convex base Or plate d', affixed to the valve, as shown in Fig. 3, said plate bearingloosely upon a concave seat cl2, formed on the end of the stem b', and retainedin place on said seat by means of a fiange cl3, which is affixed to the stem and has an orifice somewhat larger than the body of the valve next to the base d', said Orifice loosely surrounding the valve, while its margin overhangs the concave seat and the edge of the base d', the base being therefore permitted to rock or tip slightly with the fiange on the end of the stem, so that the valve accommodates itself more perfectly to the seat than it would if rigidly attached to the stem.

The outer end of the stem b is provided with an adjustable stop-screw b4, which limits the Outward movement Of the valve and stem by striking against a hardened-steel plate b5, inserted in a nut h6, screwed upon the guide CL3.

I do not limit myself to the employment Of the improved valve hereinbefore described in a steam-trap andinay use it fora'ny other purpose or purposes to which it isapplicable.

I claim- 1. An appliance of the character specified,- comprising' a stationary casing having an outlet, a conduit journaled to turn in the casing and constituting the inlet thereof, an annular valveseat at the inn er end of said conduit communicatingwith said outlet, a valve opposite said seat having a steep-pitched screw- --threaded stem engaged with an internal thread in the casing, whereby the valve may be'full'y Opened by less than a complete rO- tation thereof and a connection between the conduit and valve, through which rotary motion is communicated from the conduit to the valve to cause a longitudinal movement of the valve.

2. An appliance of the character specified, comprising a stationary casing having a stufing-box at one end, an internal screw-thread at the other end, and an intermediate outlet, an inlet tube or conduit journaled in the casing and passing through the stuffing-box, said conduit having an annular valve-seat at its inner end communicating with the outlet of the casing; a valve in the casing Opposite the said seat and provided with a stem hav ing a steep-pitched screw-thread engaged with the screw-thread in the casing, and a sliding connection between the conduit and valve.

In testimony whereof I have signed my name tO this specification, in the presence of two subscribing witnesses7 this 20th day of January, A. D. 1896.

BURTON w. HILL.

lVitnesses:

HORACE BROWN, A. D. ADAMS.

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