US72204A - Improvement in steam-engine goveenoes - Google Patents

Description

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@nitro taire gatmt @Him OLIVER A.A KELLY, OF SLATERSVILLE, ASSIGNOR TOA LAMB, COOK- da GO., OF FORRESTVILLE, RHODE ISLAND.

Laan mantuvo. 72,204, zaad beamte-17, 1867.

IMPROVEMENT IN vSTIELtlld-ENGINE GOVERNORS.

dite .tlgehulr referat-tu in there `Estad tatent ma mating mi at tige rams.

'ro ALL WHoM IT MAY' coNcERN:

.Be it known that I, OLIVER A. KELLY, of Slatersville, in the county of Providence, and. State of Rhode AIsland, have invented a new and improved Steam-Engine Governor; and I do hereby declare that -the following is a full, clear, and exact description thereof, which will enable those skilled in the art to make and use the same, reference being had to the accompanying drawings,'forming part of this specification. i

The drawing represents a sectional elevation of my improved governor.

Similar letters of reference indicate corresponding parts.

lThe object of this invention is to obviate the violent changes and consequent fluctuations in the quantity of steam admitted to the piston, and is especially designed for engines that are regulated by the main valves.

The invention consists in the arrangement, within the hollow spindle, of a sliding vertical rod,.which is made of two pieces that are screwed together, the upper one being connected with the balls, while, from the lower one, the valve is suspended. The upper piece is provided with an adjustable sleeve, which has pins, by which it is or may be connected with bevel-gear wheels, arranged above and below, and revolving in opposite directions.

When the requisite amount of steam is in the cylinder, so that thc spindle revolves with the required velocity,

the aforesaid sleeve will .be-suspended between the two gear-wheels, and will not at all come in contact with the same, so that the spindle will not be revolved. The valve will thereby be held suspended in the desired position, so as to admit-the required amount of steam to the cylinder.` As soon as the spindle revolves too quick, the rod will be lowered, so-that the sl'eeve will come in contact with the lower gear-wheel; thereby the upper end of the rod is turned so as .to be gradually unscrewed from the lower end, which onlyslides, not turns, and the valve is thusgradually lowered to diminish the quantity ofsteam allowed to the piston. When the required velocity is reached, the sleeve will again be out of gear, and the yvalve will be in its proper position. Should the spindle revolve too slow, the valve-rod will be raised, so as to be revolved bythe upper gear-wheel, whereby Y the'upper part is turned so as to draw the lower part up, thereby enlarging the passage for the steam until the required equilibrium is again reached. The sleeve being adjustable up and down on the valve-rod, it can be set so that the engine may revolve with any desired velocity. The governor will, after having been adjusted, not require any more attention fromy theengineer, and will prevent the iiuctuations in the speed of the engine.l

A represents the hollow shell or case which supports and holds all the other parts of the governor. B is the tubular spindle, carrying two arms a on top, in which the levers C of the balls D are pivoted. 0n the lower end of the spindle is a bevel-gear wheel, E, which meshes into the teeth of a similar wheel, F; the latter being mounted on a horizontal shaft, G, carrying the driving-pulley as shown. The shaft G has its bearings in a tube, I, projecting from thc shell A, as is clearly shown in the drawing. J is another bevel-gear wheel arranged under the wheel E, so asalsoto mesh into the wheel F. Thus, as the driving-shaft G is turned, the wheels E and J will revolve in opposite directions, and with the former will the spindle B be rotated. K is astraight rod, which is fitted loosely through the tubular spindle B and through the wheels E and J, so as to allow the spindle and wheels to turn freely around it without turningY itself. The lower end of the rod K is screwed to the upper end of another rod, L, which is arranged in the lower part of the shell, and which carries at its lower end the valve M, as is clearlyshown in the drawing. This valve'is'provided with triangular recesses I1 b, through which the steam must enter the steam-pipe N on its passage to the same from the boiler. The more the valve is lowered, the smaller will be that portion of the recess which is open to the pipe N, and the smaller will consequently be the quantity of steaml admitted to the engine. The more the valve israised the larger will vbe the quantity of steam admitted,as is easily understood from the drawing. Although Iprefer the use of this valve, it is1evidcnt that valves of different construction can be arranged in the governor with equal effect; and I do not herein claim the construction of the valve. The upper part of the rod K is connected with the ends of the levers C, as seen, so that the rod K L will be raised or'lowered as the balls are more orless spread.` 'O is a studing-box, arranged around the rod L, above the valve-chamber, to preventthe escape of steam. P is a sleeve,'tted around the rod K, between the gear-wheels E and J, and secured to the same by means of a setscrew, c. From the upper and under face of this sleeve project verticalvpinsandt respectively. To the under face of the wheel E are secured vertical pins,f, and to the upper surface of the wheel J-similar pins, g, as is clearly shown in the drawing.

The operation will now be easily understood: The valve M has at its under side `a projecting pin, h, which strikes against a horiaontal pin, z', so that the valve and its stem L will be prevented from revolving, at least as long as the valve is not quite open or raised. The pins d and e on the sleeve P should be so short that the distance between their extreme ends is less than the distance between the extreme ends of' the pinsf and g. The sleeve P being soton the rod K in the desired position, so. that the valve will be opened far enough to admit a certain desired quantity of steam, the spindle is revolved. The sleeve will then bejust between the wheels E and J, so that its pins d and e move clearotl the pinsf and g, as inthe drawing. v But when the spindle turns too quick, so that the balls are spread further, the rod K will be a little lowered, so that the pins e come in contact with the pins g on the wheel J'. Thereby the rod K will be turned, and will be unserewed from the rod L; that is, the whole rod K L will be lengthened, sov that the valve is lowered and the supply of steam gradually diminished. When the spindle revolve'stoo slow, so that the balls come together, the rod K will be raised, so that the pins d on the sleeve P will he brought in contact with the pinsf on the wheel E. Thereby the red K will` be turned so as to be screwed together with the rod L, or soI that the whole rod KL will be shortened, whereby the valve is raised until the volume of steam admitted is suliciently large. During all these motions the rod L is prevented from turning by means of the pins L and 'L'. But when the valve is raised as high as possible, so thats. full volume of steam is allowed, and so thaLt the engine revolves with the least velocity, the

pin t will not reach to the pin z', and a pin, 7', on a shoulder formed near the upper end of the rod L, will engageV with. a pin, c, on the lower end of the rod K, whereby the rods K and L will he united so as to revolve together, thereby preventing the parts from becoming disordered. When the spindle beginsto turn quicker again, the Whole rod KL will be lowered by the spreading balls, and the pins h and z' will be again brought in contact with each other, when one half turn of the rod K will be suicient to release the pins 7' and 7c from each other,

I claim as new, and desire to secure by Letters Patent- 1. The valve M, constructed as described, with the triangular recesses b b and downward-projecting pin L, arranged in relation with the pin z' and screw-valve rod L, as herein described for the purpose specified.

2. The arrangement of the valve M, pins hz', valverod L, sliding rod K, and pinsj k, as herein described, for the purpose specified. v OLIVER A. KELLY.

Witnesses:

SAMUEL S. SeAMMnLL, WM. H. SnAGnovs.

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