US342962A - Muffler for steam valves - Google Patents

Description

(No Model.) 2 Sheets-Sheet 1. V

T. E. HILL.

MUFFLER FOR STEAM VALVES. No. 342,962. Patented June 1, 1886.

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MUFFLER FOR STEAM VALVES. No. 342,962. Patented June 1, 1886.

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.hincd with a safety-valve.

UNITED STATES PATENT OFFICEQ TllOMAS ENGLISH HILL, OF RAHVAY, NEXV JERSEY.

MUFFLER FOR STEAM-VALVES.

Application tiled February 16, 1886. Serial No. 192,118.

To aZZ 107mm it may concern:

Be it known that I, THOMAS ENGLISH HILL, of Rah way, in the county of Union and State of New Jersey, have invented a new and Improved Mufllcr for Steam-Valves, ofwhich the following is a full, clear, and exact de scription.

The object of my invention is to provide an improved muiller or device for deadening or preventing the unpleasant hissing sound incident to escape of exhaust steam from the valves of steam engines as ordinarily con- Structcd;

The invention is embodied in the construction and combination of parts hereinafter described and claimed.

Reference is to be had to the accompanying drawings, forming part of this specification, in which similar letters of reference indicate corresponding parts in all the figures.

Figure l is a sectional elevation of my new and improved mnfllcr, showing the same com- Fig. 2 is a section- 21 plan view of the same, taken on the lines as of Fig. 1; and Fig. 8 is a plan view of the inner lever for relieving the valve of pressure.

A represents the main casting of the muffler. This is formed with the outer upwardlyprojecting circular casing, B, and with theinner upwardlyprejecting concentric flanges or platcs,O D, which f'll'lll the annular chambers E F, and central circular chamber, G.

In the central open'ng, H, of the casting A is fitted the valve I, which forms the bottom (f the central chamber, G. The valve I is held down to its scat against the pressure of steam by the action of thespring J, which acts between the plate K (which is held down by the heavy bolt L) and the bottom of the circular box M, which is formed or provided with the point a, which enters a centering- SOOliGl) in the top of the valve I, as shown clearly in Fig.1.. The box M is of smaller diameter than the chamber G, Formed by the flange D, so that an annular space is left be tween theadjacent surfaces of the said box and :llange, into which steam escaping from the Valve I first enters, and the upper edge of the box M has connected to it the shell N, which surrounds the bolt L loosely and reaches up through the deflector l", and is provided at .LCIEICATION forming part of Letters Patent No. 342,962, dated June 1, 1886.

(No model.)

in this instance the deflector is formed with two downwardly-proj ecting concentric flanges, PP. These are of such diameters respectively rclatively to the diameters of the flanges D C and main outer casing, 13, that they are adapted to plunge into the chamber E F and occupy a position about midway between the adjacent walls of the flanges G D and O B, respectively, as shown in Fig. 1. The flanges P P form a central chamber, R, in the deflector, and also a surrounding annular chamber, It. The former incloses the central circular flange, D, and covers entirely the chamber G, while the former (the chamber R) incloses the flange C, so that when steam escapes from the valve I and issues from the chamber G it will be deflected downward and compelled to travel under the flanges P P and over the flange G, entering at each turn chambers of gradually-increasing size, so the steam is not only compelled to travel a circuitous course, but is diffused in the chambers and its pressure reduced.

The deflector P is braced by the studs S S, which depend from the top plate, T, and the inner lever, Q, is fulcrumed to the stud S, and is linked to the outer lever, Q, by the link Q, so that any downward movement of the lever Q, will lift the lever Q, and cause it in turn to lift the shell N and box M, as above described.

The top plate, T, is bolted to the upper edge of the casing 13 of the main casting, and it is formed with numerous holes,c c,through which the steam must pass, and which divide it up into small jets. The upper surface of the plate T is formed with the radial ribsccforstrengthening'it, and the central aperture,f,of the plate T is screw-threaded to receive the screwthreaded upper portion, 2,01 the heavy bolt L, so that by turning the bolt L it may be longitudinally adjusted for. regulating the pressure of the spring J upon the valve I.

The two jam-nuts m are placed upon the l L, and the levers for lifting the box M, snb

bolt L above the plate T for locking the bolt,

and over these and the top of the boltis placed the cap U, to protect the nuts and bolt, and

5 this cap is perforated to permit the escape of anv steam that may enter it.

Havingthus described my invention, I claim as new and desire to secure by Letters Patent-- 1. The main casting A, formed with the IO casing B and flanges O D, and the dome P,

formed with flanges P P, in combination with the valve I, box M, spring J, casing N, bolt stantially as and for the purposes set forth.

2. The combination, with the main casting 15 having annular chambers, and the central chamber, G, of the valve I, and the box M, for inclosing the spring within the central chamber, G, substantially as described.

THOMAS ENGLISH HlLL.

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