US286002A - Cut-off valve - Google Patents

Description

(N0 Model.) 2 Sheets-Sheet 1.

T. W. HEERMANS.

"GUT-OFF VALVE.

No. 286,002. Patented Oct. 2, 1883.

Why 2246565: 139118391502".-

2 Sheets-Sheet 2.

(No Model.)

T. W. HEERMANS.

OUT-OPP VALVE.

Patented Oct. 2, 1883.

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Uivrrnn STATES PATE-N'r @rrrctt.

TI-IADDEUS W. HEERMANS, OF CHICAGO, ILLINOIS.

CUT-OFF VALVE.

SPECIFICATION forming part of Letters Patent No. 286,002, dated October 2, 1883. Application filed March 5, 1883. (No model.)

To ctZZ whom it may concern-.-

Be it known that I, THADDEUS W. HEBR- MANS, residing at Chicago, in the county of Cook and State of Illinois, and a citizen of the United States, have invented anew and useful Improvement in Out-Off Valves for Steam-Engines, of which the following is a full description, reference being had to the accompanying drawings, in which Figure 1 is a crosssection on line 00 of Fig. 4; Figs. 2 and 3, longitudinal and cross sections of a cylindrical valve; Fig. 4, a longitudinal section on line 3/ of Fig. 1; Figs. 5, 6, and 7, details of the device for giving the valve rod an endwise movement, and Fig. 8 a

side viewof the arm used in rocking the valverod; Fig. 9, supporting-plate for the rod J.

The object of this invention is to improve the construction and operation of a steanrengine; and its nature consists in the several improvements in parts and combination of parts hereinafter described and claimed as new.

In the drawings, A indicates the cylinder; B, its heads; 0, piston-rod; D, steam-chest; F, cylindrical valvecasing F, cylindrical valve; G, exhaust passage or pipe; H, exhaust; I, cap-plate of steam-chest J, valverod; K, arm for giving the valve-rod its endwise movement; L, guide-bracket; -M, guide; N, support for the valve-rod and rocking arm or lever; O, stuffing-boxes; l steam-pipe; a, steam-chamber, partly surrounding the valvecasing E; b, openings or ports in the casing E; c d, openings or ports in the valve F; e, steam and exhaust ports for the cylinder; f, exhaust-passages in bonnet; g, adjustable stops or collars on the rod J; 71 supporting-plate for the rod J at or near the rocking arm 1'; j, upper end of arm t,- k, spline for communicating a rocking motion by the arm 2' to the rod J; Z, screw for clamping the collars gto the rod J; m, pin or bolt for attaching an eccentric-rod; a, rod for rocking the arm '17. The cylinder A, with its heads, contained piston, and piston-rod, are so nearly of the usual construction as not to require a specific description. The steam-chest is cylindrical in so far as it is separate from the main cylinder, except at the top, which is covered by the plate I. The cylinder and steam-chest are cast together, as shown at Fig. 1, the steam passages and ports being cored'out in the usual manner, and by surrounding the valve-cylinder E with the steam-passage a, I prevent the valve F from sticking by expansion.

The valve F is of a sufficient length to cover the steam-ports, as shown in Fig. 4C, and as shown enlarged at Fig. 2. It will be seen that its ends are solid, and that it has a middle partition, so that at each end it has a separate and distinct action. Near its ends it is cut through to form the ports (I, as shown in Figs. 2 and 4.. It is also provided with the ports 0, which operate in cmnection with the ports or passages b of tl e valve-cylinder E. The long cylindrical valve F has a compound movement-that is, a sliding and rotary motion* communicated to it by the arms K and '6 through the rod J. The arm K is attached to the rod by means of two adjustable collars or clamps, g, which are fastened to the rod J each side of the arm K and in close contact therewith. These collars are of the form shown in Fig. 7, and are clamped to the rod by the screw or bolt Z, and, as they may be moved along the rod, they furnish the means for adjusting the endwise position of the valve F, and also for taking up or compensating any wear.

The rod J passes through the end of the arm K, as shown in Fig. 6, and while the collars g are fastened to the rod J it is free to rotate in that part of the arm through which it passes, so that the upper end of the arm in giving the rod its endwise movements will not interfere with the rocking or rotating of the valve-rod. The arm K is supported by the guide or rod M, which is connected with the bracket L. This arm K is operated by an eccentric from the main shaft in the usual manner, having its rod attached to the pin or bolt m.

Near the arm K, I apply another arm, '5, to the shaft J, which arm is supported by the bracket h N, which is suitably attached to the frame or support of the engine or main shaft. This device is arranged so thatthe rod J will pass freely through it, and thus pre vent its interfering with end movements; but it is provided with a groove, and the arm 73 is also provided with a similar groove, (shown at k in Fig. 8.) The spline is placed in these grooves loosely, so that while it will prevent jnsted.

By this arrangement for supporting and operating the valve-rod the valve F is given a twisting or spirally-rotating motion, whereby the ports or openings 0 are made to operate by the rocking movement of the valve, While the ports (I and the exhausts are controlled and operated by the endwise movement of the valve, and by this arrangement I am enabled to operate all of the ports or openings by the use of a single valve, thereby reducing the number of parts and simplifying the construction of the steam-chest and its ports, and the spiral movement of the cylindrical valve, combinedwith the endwise movement. gives all of the ports an easy and prompt action, while the valve itself is perfectly balanced in both of its motions and relieved from friction or other difficulties in the way of its prompt and efiicient action; also, a simple and cfficient independent cut-oif is produced in a single device having twodistinct and independent motions, or a valve which may be used for admitting and exhausting steam separately from or independent of the cut-off.

This valve can be used on all classes of engines and as an automatic or adjustable cutoff, and as both of its motions are positive and occur continuously at each stroke of the valve it is applicable to high and low speed engines, and by its use and arrangement I am able to keep exhaust-steam from contact with the li vesteam spaces.

It will be seen from the foregoing that the rocking and endwise movement of the valve which is an entirely different thing from those engines wherein the valve is connected with a governor, so that an increase in the speed of the engine causes the governor-arms to fly outward, and thereby partially rotate a longitudinally-movable valve to reduce the inflow of steam to the cylinder.

What I claim as new, and desire to secure by Letters Patent, is

1. The cylindrical cut-off'valve'F, having imparted to it the simultaneous rocking and endwise movements continuously at each of its strokes, substantially as described.

2. The combination of the arm i, having the groove k, with the valve-rod J, having a cor responding groove, the loosely-fitting spline, the bracket h N, retaining the spline against longitudinal displacement, and the arm K, for imparting continuous and simultaneous rock ing and endwise movements to the valve F at each stroke of the piston, substantially as described.

3. The combination of the arm i, having the groove k, with the valve-rod J, having a corresponding groove,'theloosely-fitting spline, the bracket h N, retaining the spline against longitudinal displacement, and through which the valve-rod passes, and the arm K, secured at one end to the valve-rod between the adjustable clamps g, and at its other end arranged on a guide, M, for imparting continuous and simultaneous rocking and endwise movements to the valve at each stroke of the piston, substantially as described.

4. The tubular or hollow valve F, having a middle partition, inclosed ends, and ports 0 d, substantially as described.

" THADDEUS IV. HEER-MANS.

\Vitnesses:

L. L. BOND, M. L. PRICE.

It I

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