US318827A - Valve-gear - Google Patents

Description

(No Model.) I

L. SUHRHEINRIGH.

VALVE GEAR.

No. 318,827, Patented May 26, 1885'.

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""BHT k U I E i v i llll ilivrrnn drains Pariervr @rrrea LOUIS SUHRHEINRICH, OF EVANSVILLE, INDIANA.

VALVE-GEAR.

SPECIFICATION forming part of Letters Patent N0. 318,827, dated May 26, 1885.

Application filed April 11', 1885.

To aZZ whom it may concern.-

Be it known that I, Louis SUHRHEINRICH, acitizen of the United States, and a resident of Evansville, in the county of Vanderburg and State of Indiana, have invented certain new and useful Improvements in Valve-Gear; and I do hereby declare that the following 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 same, reference being bad to the accompanying drawings, which form a part of this specification.

My invention relates to automatic governors for steam-engines; and it consists more particularly in intervening mechanism for connecting the governor proper to the stem of the valve which regulates the admission of steam into the steam-chest,as will be hereinafter fully described, andpointed out in the claims.

Referring to the annexed drawings, Figure 1 is a perspective View of my invention, and Fig. 2 is a side elevation of the same.

The same letters indicate corresponding parts in both the figures.

Referring to the several parts by letter, A represents the governor proper, which is of ordinary construction, the inner ends of the bent centrally-pivoted arms a, which carry at their outer ends the weighted balls 0:, being pivotallysecured to the upper end of the spindle a B represents the frame which supports the intervening mechanism which connects the lower end of the spindle to the valvestem. Upon this frame 13 is centrally pivoted, at d, th'ehorizontal lever O,having pivotally secured upon one of its ends astep, D, within which the lower end of the spindle A is secured. The free end of this lever is provided with a sliding adjustable weight, 0, for the'purpose hereinafter set forth.

E represents a horizontal pitman, which is pivotally connected at one end to the lower end of the rigid downwardly-projecting arm a of the lever O, and is similarly secured at its other end to the lower end of a centrally-pivoted auxiliary lever, 15. The upper end of this lever is provided with a longitudinal slot, f, and to this upper end is adjustably pivoted one end of a lever, G, by means of the screw 9 passing through the slot f, and secured adjust- (No model.)

ably in the said slot by a nut, g, as shown.

The reduced central portion of the adj ustablypivoted lever G passes through a verticalslot, h, in the upper enlarged end of the stem H of the valve which regulates the admission of steam into the steam-chest.

1 indicates a horizontal shaft secured in suit able hearings on the frame B at right angles to the lever G, and provided at its outer end with a pulley, i, to adapt the shaft to be rotated by means of an endless belt or chain from the main shaft of the engine, the said pulley running at the same rate of speed as the engine. Upon the other or inner end of the shaftI is secured a cam, J, having the wings or projections j. Aspring, K, which may be adjusted by means of the nut is to the requisite tension, serves to depress the valve-stem H, thereby keeping the valve which regulates the admission of steam into the steamchest closed, except when the same is opened in the manner which will now be described.

The operation of my invention is as follows: The horizontal shaft I is, as before described, rotated by the main shaft of the engine when the same is in operation, thereby turning the cam J in the direction indicated by the arrow in Fig. 2, the wings or projectionsj of the cam striking against the lower side of the free end g of the lever G, thereby turning the said lever on its pivot, and as the central reduced portion of the lever passes through the slotted upper end of the valvestem H the said stem is also raised, thereby opening the valve and admitting steam into the steam chest. As the projection on the cam passes from beneath the free end of the lever the spring K depresses the valve-stein, thereby closing the valve and shutting off steam from the steam-chest, this operation being repeated as each projection of the cam passesbeneath and lifts the free end of the lever G. As soon as the speed of the engine becomes too great the weighted balls a of the governor (which, as before stated, is of ordinary eonstru ction) will be elevated so as to depress the spindle aiwhich in turn depresses the end of the lever 0, upon which its lower end is supported, thereby, through the pitman E and auxiliary lever F, operating to draw back the free end of the lever G,s0 that the cam proj ectionsj will occupy a shorter space of time in passing beneath the said shortened free end, thus opening the valve for a shorter space of time at each revolution of the cam than when the lever G is advanced,

so as to diminish the amount of steam entering the steam-chest, and thereby causing thespeed of the engine to decrease. When the speed of the engine falls below the desired standard, the spindle will be elevated through the falling of the weighted balls a, thereby reversing the movements just described and projecting the free end of the lever forward, so as to admit a greater quantity of steam into the steam-chest to increase the speed of the engine. The adjustable weight 0 may be moved nearer to or farther from the pivotal point of the lever C, so as to increase or diminish the pressure re quired to be exerted through the governor to depress or elevate the lever C. By raising or lowering the adj ustably-pivoted end of the lever Gthe height to which its free end is raised, and consequently the amount of steam which will enter the steam-chest at each revolution of the cam J, can be regulated.

Having thus described my invention, what I claim, and desire to secure by Letters Patent of the United States, is

1. The combination, with the governor, of the centrally-pivoted lever having the rigid downWardly-projecting arm, the pitman, the

30 auxiliary lever, the lever passing through the slotted upper end of the valve-stem, the valvestem having the slotted upper end, the adjustable spring, and the cam having the wings or projections arrangedto operate in the manner set forth, substantially as described.

2. The combination, with the governor, of the centrally-pivoted lever provided with the adjustable weight and having the rigid downwardly-projecting arm, the pitman, the auxiliary lever, the lever passing through the slotted upper end of the valve-stem, the valvestem having the slotted upper end, the adj ustable spring, and the cam arranged to operate in the manner set forth, substantially as described.

3. The combination, with the governor, of the centrally-pivoted lever having the rigid downwardly-projecting arm, the pitman, the auxiliary lever having the longitudinal slot in its upper end, the lever adj ustably secured at one end to the slotted upper end of the auxiliary lever and passing through the slotted upper end of the valve-stem, the valve-stem having the upper slotted end, the adjustable spring, and the cam arranged to operate in the manner described.

4. The combination, with the governor, of the centrally-pivoted lever provided with the adjustable weight and having the rigid downwardly-projecting arm, the pitman, the auxiliary lever having the longitudinal slot in its upper end, the lever adj ustably secured at one end to the slotted upper end of the auxiliary lever and passing through the slotted upper end of the valve-stem, the valve-sten1 having the upper slotted end, the adjustable spring, and the cam arranged to operate in the manner described.

In testimony that 1 claim the foregoing as my own I have hereunto affixed my signature 70 in presence of two witnesses.

LOUIS SUHRHEINRIGH.

\Vitnesses:

ALEXANDER GILCHRIST, CURRAN A. DEBRULER.

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