US346435A - Geoege h - Google Patents

Description

(No Model.)

G. H.v DUTHIB.

STEAM VALVE. No. 346,435. Patented July 27, 1886.

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linnen STATES ATENT GEORGE H. DUTHIE, OF MUSKEGON, MICHIGAN, ASSIGNOR OF ONE-HALF TO VILLTAM XV. BAROUS, OF SAME PLACE.

STEAM-VALVE.

' ICEICATION forming part of Letters Patent No. 346,435, dated July 2'7, 1866.

A pplicalon filed May E, 1886.

T all whom zit may con/cern,.-

Be it known that l, GEORGE H. DUTHIE, of Muskegon, in the county of Muskegon and State of Michigan, have invented certain new and useful Improvementsin E t ani-Valves;and I do hereby declare that the lfollowing is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the saine,

1o reference beinghad to the accompanying drawings, and to letters of reference marked thereon, which form a part of this specilication.

My invention relates to an oscillating valve for steam-engines, and the improvements therein are of such a nature that, first, it is perfectly balanced in its action; second, supplies the steam to the cylinder so that its force upon the piston is gradual from the beginning to the end of the stroke thereof; third, ex-

2o hausts so that a cushion is formed in front of said piston, the reactionary force of which greatly aids the return-stroke, and, fourth, when the valve becomes worn, it can be snugly fitted or adjusted in its scat.

2 5 In the drawings, Figures l, 3, and 4 are transverse vertical sections showing the valve of my invention in different positions, and Fi 0'. 2 is a longitudinal vertical section of the same.

Reference being had to the drawings and 3o letters of reference marked thereon, A represents the valve having lateral basal flanges, by means of which it is bolted to the pistoneylinder. It has a cylindrical bore, and the upper half of the shell is made hollow,

3 5 so as to form a chamber, a, for the fresh live steam, which is supplied thereto from a snitable source, through the opening b. This chamber a is provided with openings b into the core or inner circumference of the valve-cylinder,

4o near the ends thereof.

Fitting snugly within the core of the valvecylinder is the sleeve B, which is of a length corresponding to the distance between the outlet-openings b b, and which is placed in position between said openin gs. The exterior' of the sleeve is cylindrical; but the interior bore tapers from a less to a greater diameter as it approaches the actuating devices of the valve, as shown. 'This sleeve is adjustable 5o longitudinally by means of setscrews B B,

Serial No. 201,531.

(No model.)

passing through holes in the head ol said valve-cylimler, suitably tapped and located with reference to the end edges of said sleeve B.

C represents the valve, having its exterior' surface the obverse of the inner surface of the sleeve Bdnamely, tapering-and having a longitudinal sunken concave surface with a longitudinal central bridge, c, whose outer surface is on the peripheral line ot' said valve, which forms au exhaust-chamber, D, having 6o two exhaust-openings, d Z-that is, an opening on either' side of said bridge, as shown. ln the shell ofthe valve C, ou either side ol' said exhaust-chamber D, at suitable and equal distance, are the steam-ports e c. Diametrieally 55 opposite these steam-openings c care auxiliary ports f f.

In the sleeve and cylinder, on a vertical line intersecting the center ofthe valve, and of a width a little less than that of the bridge e, is the exhaust-port E, and on either side of the exhaust-port, about a distance corresponding to the width of the exhaust-openings d, are the steam-passages F. Opening into and leading from the'valveseat-. c., theinner cireum- 75 .ference of the sleeve--at a point in the sides of said valve-seat a distance from'the steamports corresponding to that between steamport openings fand e, are the auxiliary steampassages f/ g, as shown in the drawings.

The valve is mounted on a suitable shaft, G, which is journaled in suitable bearings and packed in the ends or heads of the valve-cylinder, and has a crank or arm secured to or near its outer end, through medium of which it is oscillated.

The Valve itself is of a length corresponding to about that of the sleeve B-viz, of a length corresponding to the distance between steamopenings b b from chamber cand is secured 9@ in such position on the shaft as to come between said openings L', so that the steam issuing from the latter can freely enter the open ends and circulate in the interior of the valve.

The operation of my invention is substan` tially as follows: Then the valve is in the po` sition shown in Fig. l, the piston would be near the right-hand end ofthe piston-cylinder.

The exhaust in the first instance is very slight. rlhen, as the valve assumes the position shown roo in Fig. 3, it gradually increases, and as grad- Bridge o greatly adds to the completeness of my invention; butit can be dipensed with, ifdesired. Again, instead of usin g the steam -ehamA ber a with the openings b D", the steam could enter said cylinder from the end.

The sleeve With the tapering interior, and adjustable by means of setsere\vs, can be applied to a number of oscillating and rotary valves; butwhile I deem its use preferable, yet it could be dispensed with.

Vihat I claim is- 1. The combination, in an oscillating valve, with the cylinder A, having a cylindrical bore, exhaust-port F, and steam-passages F, of a sleeve, B, having .its bore tapering from one end to the other and adjustable longitudinally, and valve C, having steam-ports o c and exhaust-chamber D, as set forth.

2. The combination, in an oscillating-valve, With the cylinderA, having a cylindrical bore, exhaust-port E, and steam-passages F and auxiliary passages g y, of sleeve D, having its cone tapering and adjusted longitudinally, an d valve C, having ports e c and fj' and exhaust chamber D.

3. The combination, in an oscillating valve, with the cylinder A, having an exhaust-port,E, steam-passages F F, and auxiliary passages g y, of valve G, having steam-ports e e andff and exhaust-chamber D.

4. The combination, in an oscillating valve, with the cylinder A, having a steamehamber, a, supplied from a suitable source, outletopenings b b, exhaust-port E, and steam-passages f/ g, oi' a valve, C, having steamports e e and ff and exhaust-chamber D.

5. rlhe combination, in an oscillating valve, with the cylinder having exhaust-port E and steam-passages F, of a valve, C, having'steamportscc, exhaustchamber D, and longitudinal central bridge, c.

6. In an oscillatingstcanrvalve, the combination, with a cylinder, A, having an exhaustport, E, and steamvpassagcs F and g, of valve C, having steam-ports c e and fp/,exhaustehamber D, and longitudinal central bridge, e.

7. In an oscillating steaxn-valve, the combination, with a cylinder, A, having a steamchamber, a, supplied from suitable source, outlet-openings b b, and exhaust-port E, steampassages F, and auxiliary steam-passages g 0, of valve C, having steam-ports c e and ff, exhaustchamber I), and longitudinal central bridge, o. I v

In testimony that I claim the foregoing as my own I hereunto affix my signature in presence of two witnesses.

GEORGE II. DUTHIE.

IVitnesses:

.Mains H. CoYNin, FRANK D. THoMAsoN.

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