US64750A

US64750A - peters

Info

Publication number: US64750A
Authority: US
Publication date: 1867-05-14
Anticipated expiration: 1884-05-14

Description

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JACOB G.;CROCKETT, OF,j PORTSMOUTH, NEW HAMPSHIRE, ASSIGNOR 'lO IIIMSELF, JOHN J. FLANDERS, AND JOHN W. HAYES."`

Letters Patent 64,75), dated Mag/'14, 1867.

IMPROVEMENT IN BALANCE-unseren STEAM ENGINES.

Be it known that I, JACOB GoonwIN Cuocrinrr, of Portsmouth, Rockingham county-', State ofl New Hampshire, have invented certain new and useful Improvements in Balance-Valves for Steam and other Engines; and I do hereby declare the following description and accompanying drawings are sufficient to enable any person skilled in the art or science to which it most nearly appertains to make and use my said invention or improvements without further invention or experiment. .Y

The nature vof my invention and improvements consists in thearra'ngement of two valves on the same shaft or rod, so that said shaft or rod shall'hold said valves against the pressure of the steam, and relieve the valveseats from the pressure of the valves; and in an arrangement ,of devices to traverse one of the valves hon the shaft, to adjust both valves to their seats; and in' the arrangement of the valves whereby they balance each other, and work 'over the ports or ways on the two 'opposite sides of a4 steam chest; also a. steam chest with a second steam chest or box within it, with induction and eduction ports or ways, or both, for the steam to pass through. Inthe accompanying drawings-4 I Figure 1 is a plan of a steam chest with the valves in it.

Figure 2 is a section on the line z z of iig. 1. A

Figure 3 is a section on the line y y of fig. I.

Figure4 is a section of the valve-rod or shaft.

Figure 5 is a plan and section of one of the valves.

In these drawings, 'A is a steaml chest or box, which may be placed'on the side or top of the cylinder.

Within the chest A there is a second steam chest or box, B, passing centrally across it, and provided with.

induction and eduction` ports or ways on cach side, and with a small exhaust-box, C, arranged on Oneach side of the box B there arel four induction ports D D D D,.for supplying steam to the cylinder, and eduction 'ports E E between the induction ports D D. Both the steam chests are perforated forthe shaft F, which passes through them, and is provided with stuffing-boxes G G. Two valves, H H', are arranged upon the shaft F,'the' valve H being rigidly fastened to the shaft, and the valve H arranged to traverse freely on it, but not turn except with the shaft. These valves .are so constructed as to balance each other, and relieve the valve-seat partially or entirely from friction. Each of-the valves, H and H', is so constructed as to cover both of the eduction and two of the Vinduction ports on each side of the chest B, each wing of each valve being provided vwith an exhaust-spaceor cavity, El, on its under side. When the valves are in the position shown in fig-1 the ,steam enters the induction vports D D, and vpasses to the cylinder through the passages I I, while the exhaust steam escapes through the ports D D\into the exhaust-space J under the valve, and from thence into the eduction ports E E, and from thence through the exhausbpassages K, and through the eXhau`st-boX C to the waste pipe or condenser. The valves H Hma'y be moved, by some convenient device applied to the shaft F, so as to shut the steam from the cylinder, as a cut-off, and to supply the opposite end of the cylinder from what was-'supplied at the previous stroke, and exhaust from the end rst' supplied. Two induction ports on each side of the steam chest B are open at the same time, and connected by the passages I to one endof the cylinder. The other two on the other side of the steam chest B are connected by the passage I, shown in dotted lines. To`adjust theA valves to theirseats I make -theend of the shaft F hollowto a little beyond the valve H', and fit the :od L to it to traverse freely init, and apply a stuiing-hoX, M, to prevent the steam from escaping around the rod L. l I make a slot in the shaft F, so that thev key N, which keys the valve H to the rod L, can traverse with the rod and valve H.. I cut a Screw on the endof the rod L, and the nut P to it. The shaftF is grooved rounds wise, near the stuiing-jbox' M, for the collar Q to turn in, whichecollar is fnade in two parts, and connected by four bars tothe collar R,`which is also inVv two parts. These collars are held together. around the shaft by the screws S S.' The nut P, on the end of the rod I., is i'tted to a mortise in the collar R, so that, by turning the collars R and Q, `the rod L may be traversed in the shaftl F, to move the valve Hi, which is keyed te the rod, s o as to adjust the'valves H andH to their seats, so that they may work with very little, if any, pressure or friction. The rod L is prevented from turning in the shaft F. by the key Ngvwhich connects it to the valve H.

One side of the nut P is sawed open, and the clamping-screw T is fitted to it to clamp the nut on the screw, and prevent it from turning'when the valves are properly adjusted.

In the foregoing description I have shown my balance-valves working on the outside and on the opposite sides of the steam box B; but I contemplate that they may be reversed ou the shaft so as to work over ports on the opposite sides of a box on` the inside, and that the ports or passages foi; the steam may be made in the sides of the said box, similar to those described in the box B. When arranged in this Way the valves balance each other as perfectly as in the mode previously described, and the nut,`rod, and collars will adjust them to their seats as Well as before. Au arm may be-applied to theshaft to work 'the-valves on the port H; and, when so made, the shaft need not enter or pass through the opposite side of the box A. I have described the valves as heilig made with `exhaust-spaces; but they may be, made Without such spaces, if preferred that way.` I have described my improvements as applied to Working steam, but contemplate that valvesbalanced in the same way may be used for water and other liquids or fluids.

A Having described my improvements, I elaim- The arrangement of two valves on the same shaft, sothat the shaft shall hold the valves against the pressure of the steam, and relieve the valve-seats from the pressure of the valves, substantially as herein set forth.

I claim the devices described for traversing one of the valves on the shaft to adjust both to their seats, substantially as described.

JACOB GOODVIN CROCKETT.

Witnesses:

FRANCIS BAcoij, Gno. W. TowLn.