US340541A - Charles w - Google Patents

Description

1 contact with its seat or valve-face by a regu UNITED STATES PATENT OFFICE.

CHARLES V. BARNABSLQF SALEM, OHIO, ASSIGNOR OF ONE-HALF TO THE BUCKEYE ENGINE COMPANY, OF SAME PLACE.

STEAM-ENGINE VALVE.

SPECIFICATION forming part. of Letters Patent No. 340,541, dated April 27, 1886.

Application filed January 27, 1886.

To aZZ whom it may concern.-

Be it known that I, OHARLEs W. BARNABY, of Salem, in the county of Golumbiana and State of Ohio, have invented certain new and useful Improvements in Steam-Engine Valves, of which improvements the following is a specification.

My invention relates to that class of steamengine distribution-valves which are provided with ports and passages through which steam is admitted to and exhausted from the cylinder without entering the chest in which the valve traverses, the valve being maintained in lated pressure of steam admitted to the chest for such purpose independently of the cylinder-supply. 4

The object of my invention is to reduce the area and travel of the valve relatively to a given area of port-openings, or to afford better port-openings relatively to a given valve movement, or both, thereby increasing the leverage of the governor on the valve in single-valve automatic cut-oii engines, reducing the throw and diameter of the eccentric, and consequently the friction. and tendency to heat at high speed, and reducing the power required and wear involved in operating thevalve.

To this end my invention, generally stated, consists in a steam-distribution valve having a longitudinal exhaust passage or passages connecting two or more exhaust-chambers, and a longitudinal steam passage or passages connecting two or more steam-chambers.

The improvements claimed are hereinafter fully set forth.

In the accompanying drawings, Figure 1 is a longitudinal central section through a steamcylinder and valve-chest and a single-ported valve illustrating an embodiment of my invention; Fig. 2, alongitudinal section through the valve at the line at w of Fig. 4; Figs. 3and 4, transverse sections through the valve at the lines y y and z 2, respectively, of Fig. 2; Fig. 5, a longitudinal central section through a steam-cylinder and valve-chest and a doubleported valve embodying my invention; Fig. 6, a longitudinal section through said valve at the line 10 w of Fig. 7; Fig. 7, a horizontal section through the valve at the liner '0 of Serial No. 169.837. (No model.)

Fig. 6; and Figs. 8 and 9, transverse sect-ions through the valve at the lines r r andt t, respectively, of Fig.6.

My invention is herein exemplified as embodied in a reciprocating-slide distributionvalve of what is ordinarily termed the D or cup type, but, as will bereadily obvious. is equally applicable to valves adapted to rock or vibrate over longitudinally segmental 6o valvefaces, and, without change of principle, to valves of the piston type, and to valves .having two or more working-faces, as on the side or back as well as the face next the cylinder. 6 5

Referring to the drawings, the cylinder 1 is closed at its ends by heads 2, in the usual manner, and is fitted with a piston, 3, secured upon a piston-rod, 4. A valve-chest, 5, closed at top by a cover, 6, is cast upon or secured to the cylinder 1, and atrulyplane valvc-face, 7, over which the valve traverses, is formed on the outer surface of the cylinder within the chest 5. A central steam supply passage, 8, to the outer end of which the steam-pipe is connected, and which opens by a port, 9", to the valveface, is cored centrally in the cyliir dershell, and exhaust-passages 9 9, opening by ports 10 10 to the valveiace and leading to a suitable exhaust-pipe, are cored in the cylindershell adjacent to and on opposite sides of the steam-passage 8. Induction and educt-ion ports 11 l1 lead from opposite ends of the cylinder to the valve face adjoining the exhaust-ports 1O 10. 8 5

The valve 12 is a box or chambered casting faced oii' truly on its side,which bears against the valve-face, and connected to a valve-stem, 13, which is reciproeated, through proper intermediate connections, by an eccentric in the 0 ordinary manner. A steam chamber, 14, which opens to the valve-face by a port, 15, is formed centrally within the valve 12, and is connected by a longitudinal steam passage or passages, 16, (two being preferably em- 5 ployed-one at each side of the valve-in order to equalize its bearing upon the valveface,) with two steam-chambers, 17 17*,which are located at opposite ends of the valve, and open by ports 1818*, respectively, to the valveface.

Two exhaust-chambers, 19 19, extend across the valve,one on each side of the central steamchamber, said chambers opening to the valveface by ports 20 20, respectively, and being connected by a central longitudinal exhaustpassage, 21.

In the position of the valve shown in Fig. 1, being at the left-hand end of its stroke, steam from the cylinder-supply passage 8 enters the central steam-chamber, 14, of the valve through the ports 9 and 15, and passes through the passages 16 to the right-hand steam-chamber 17, and thence through the val ve-port 18 to the right-hand cylinder-port 11 The exhaust from the left-hand cylinder-port 11 enters the exhaust-chamber 19 through the port 20, and passes from said chamber through the ports 20 and 10 to the exhaustpassage 9, and through the passage 21, exhaust-chamber 19 and ports and 10 to the exhaust-passage 9.

The exhaust-steam which enters the exhaustchamber 19 of the valve through the cylinderport 11 being delivered directly from said chamber to the exhaust-passage 9, and simultaneously delivered through the longitudinal exhaust-passage 21 and chamber 19 to the exhaust-passage 9, it will be seen that a reduction is thereby effected in the width of the exhaust-ports l0 and 10 and 20 and 20, and consequently in the length and area of the valve 12. A further reduction'in the area of the valve, as well as in the length of its travel for a determined port-opening, is effected by the application of the construction above described in a multiported valve having one or more additional pairs of steam and exhaust chambers, said steam and exhaust chambers, respectively, being similarly connected by passages extending longitudinally through the valve, one of the additional pairs of steam-chambers being either single or double ported, according as it may be desired to double-port or to triple-port the va ve for induction.

A double-ported valve of such character is illustrated in Figs. 5 to 9, inclusive, referring to which it will be seen that the cylinder steampassage 8, exhaust-passages 9 9, and steam and induction ports 11 11 are similar to those first described, except that the ports 11 11 are each divided and open to the valve-face by two ports, I) c and (Z c, respectively, each of said ports being one-half the width of the main port, 11 or 11, out of which it leads. The central steam-chamber, 14, of the valve 12, which opens to the valveface by a port, 15, is connected by thelongitudinal lateral steampassages 16 with apair of intermediate steamchambers, 17 17 having face-ports 18 18, and with a pair of end steam-chambers, 21 24, having face-ports 25. The exhaust-chambers 19 19, which open to the valve-face by ports 20 20, are connected by a longitudinal central passage, 21, with each other and with an additional pair of exhaust-chambers,22 22", provided, respectively, with face-ports 23 23*, the exhaust-chamber 22 being interposed between the steam- chambers 21 and 17, and the exhaust-chamber 22 being interposed between the steam-chambers 17 and 24. The valve is thus double-ported both for steam and exhaust, with a corresponding reduction in its area and length of travel, and, if further reduction is desired, it may be triple-ported in a similar manner, either by the addition of another steam and another exhaust chamber at each of its ends, said chambers communicating with the steam-passages 16 and exhaust passage 17, respectively, or by forming two independent face-ports in each of the end steam-chambers, each of the cylinder- ports 11 and 11 being in either case divided into three valve-face ports, in lieu of two, as in the case of the double-ported valve shown. In the case in which the end chambers have two ports the valve will be triple-ported for induction and double-ported for exhaust.

The governing principle of my invention being the provision of a series of ported steamchambers and ported exhaust-chambers connected by independent longitudinal passages,

'so that the traverse of supply and exhaust steam may be effected coincidently to and from theseveral ch ambers of each series respectively, the number, form,and location of said chambers and passages may be varied materially, in the discretion of the constructer, without departing from the essence of my invention. Thus, for example, there may be a single steam-passage extending longitudinally on one side of the valve and a single exhaust-passage on the other, branches from one extending under the other at the several ports. Again, if desired, the steam and exhaust passages may be located one above the other, branches or connections from the upper passage passing through the lower to the several chambers which are to be connected by the upper passage.

The construction hereinbefore described and shown may likewise be applied in a valve in which the steamis either supplied to or exhausted from the valve, or both, at its end, and through cylinder-ports located beyond or outside of the induct-ion and eduction ports 11 11.

I claim as my invention and desire to secure by Letters Patent 1. The combination, in asteam-distribution valve, of two or more steam-chambers, each having a port or opening on the face of the valve, two or more similarly-ported exhaustchambers, a longitudinal passage or passages connecting the steam-chambers, and a longitudinal passage or passages connecting the exhaust-chambers, substantially as set forth.

2. The combination, in a steam-distribution valve, of a series of alternate steam and exhaust chambers, each having a port or opening on the face of the valve and extending transversely to the line of traverse thereof, a steampassage extending longitudinally through the valve and communicating with each of the steam-chambers, and an exhaustpassage extending longitudinally through the valve and communicating with each of the ex haustchambers, substantially as set forth.

3. The combination, in a steam-distribution valve of box or chambered form, of a series of transverse chambers, each having a port or opening on the face of the valve, a central longitudinal passage communicating with alternate members of the series of chambers which extend below it and beyond its outer sides,

or passages, and a longitudinal steam passage or channel passing over a transverse exhaust chamber and port and connecting two steam ports or passages, substantially as set forth.

5. A multiported steam-distribution valve having a series of transverse exhaust-chambers, each interposed between two transverse steam-chambers, each of said chambers having a port or opening on the face of the valve, a longitudinal exhaust-passage extending over each of the steam-chambers and communicating with each of the exhaust-chambers, and a longitudinal steam passage extending over each of the exhaust-chambers and communicating with each of the steam-chambers, substantially as set forth.

CHARLES XV. BARNABY. \Vitnesses:

RALPH S. AMBLER, B. S. AMBLER.

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