US402892A - Governor for steam-engines - Google Patents

Description

(No Model.) 2 Sheets-'- Sheet 1..

W. BERWIOK. GOVERNOR EOE STEAM ENGINES. No. 402,892. Patented May 7, 1889.

2% WITNESSES N. PETzRs Phnlo-Lilhngrlpher. wasmngton. D. C.

I 1 torney (No Model.) 2 SheAet s- Sheet 2.

' W BERWIOK GOVERNOR FOR STEAM, ENGINES.

No. 402,892. Patented May 7, 1889.

? WITNESSES,

UNITED STATES PATENT ()FFICE.

WILLIAM BEIHVICK, OF FALL RIVER, MASSACHUSETTS.

GOVERNOR FOR STEAM-ENGINES.

SPECIFICATION forming part of Letters Patent No. 402,892, dated May 7, 1889.

Application filed February 7, 1889- Serial No. 299,024. (No model.)

To all whom, it may concern:

Be it known that I, WILLIAM BERWIOK, a citizen of the United States of America, residing at Fall River, in the county of Bristol and State of Massachusetts, have invented. certain new and useful Improvements in Governors for Steam-Engines and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it apperfains to make and use the same, reference being had to the accompanying drawings, and to letters or figures of reference marked thereon, which form a part of this specification.

My invention relates to certain new and useful improvements in governors for steamengines.

One of the objects of my improvement is to provlde an attachment for the usual ball-govern or, which will assist in elevating the sleeve thereof to prevent racing of the governor when starting or when there is a sudden change in the load or work upon the engine before the ball-governor has reached its normal operative position.

My invention consists in the construction and combination of the parts, as will be hereinafter fully set forth, and pointed out in the claims.

In the accompanying drawings, which illustrate my invention applied to a governor of ordinary construction, Figure 1 is an elevation of the attachment combined with a ballgovernor, the parts being in their normal position. Fig. 2 is also an elevation. Fig. 3 is a transverse sectional view looking down upon the attachment which comprises my invention. Fig. 4 is a view of the parts inverted. Fig. 5 is a longitudinal section of the mercurytube.

A refers to the standard or column of the governor, which is of ordinary construction, and through which passes a shaft rotated in the usual manner, said shaft being connected with valves. (Not shown, as any of the valves at present used may be employed.)

The sleeve 13, which is connected in the usual manner to the ball-governor, is provided with a projection, b, to which is rigidly secured a depending rod, 0, to the lower end of which is attached a block, 0', provided on one face with teeth 0, with which teeth a toothed segment, D, engages, this toothed segment being rigidly attached or keyed to a shaft, d, which is supported horizontally by a suitable frame. The frame (fully shown in Figs. 3 and 4) consists of a casting made up of the parts 1 and 2. The part 1 has a semicircular portion with extended ends, through which ends bolts are passed for securely attaching the frame to the column or standard of the governor. This part 1 of the frame has a rectangular opening, 3, through which passes the rectangular toothed block 0, which is attached to the rod 0, and this frame also provides bearings for the shaft d, this frame being also provided with a' perforation, through which passes a vertical rod, 6, the upper end of which is headed, as shown in Fig. 3, to confine the upper end of a spiral spring, 6', the lower end of which bears upon the frame. This rod 6 passes downward beneath the frame, and is connected rigidly to a plate, E, which has a member, f, which projects at right angles therefrom. This member f carries at its end an upwardly-extending arm, F, which is provided with a slot to provide means for adj ust inga pin carrying a roller.

The angle-plate E is rigidly connected to the. block 0, so that the depending rod 0, toothed block 0, plate E, and parts attached thereto will move together.

G refers to an arm pivotally supported by the shaft (1, the long end of said arm being adapted to receive a weight, WV, while the short end is extended downwardly and inwardly to abut against the collar of the frame, which embraces the standard, so that the movement of said arm G will not be beyond a horizontal position. It will also be observed that the roller carried by the pin passing through the slot in the upper portion of the arm F is located above the short end of the lever, so that it can play or move 'upon the upper surface thereof.

The end of the shaft. (1 has rigidly secured thereto a collar, h, provided with an outwardlyprojecting portion, h, which is further eX- tended upwardly, and to the upper end of this extended portion is attached a curved tube, I, the ends of which are provided with balls 2' i. This tube and balls contain mercury or other heavy liquid.

I have hereinbefore described the construction of the parts as shown in the accompanying drawings, and it will be obvious thatthe specific construction of the parts may be varied to satisfy different styles of governors without departing from the spirit of my invention.

In operation, when the engine is at rest, the arms of the ball-governor will be nearly vertical, and when in this position the depending rod C will be depressed, which will throw the mercury-containing chamber I to one side of the center, so that it will be at an angle with the supporting-frame, the mercury flowing into the lower ball of the chamber. At the same time the spring is depressed and the long end of the pivoted lever carrying the weight \V is raised. Now, when the engine is started, the governor-balls will move outwardly, thus raising the sleeve 13, which will cause the upward movement of the rod C and the parts connected thereto. The weight and spring will assist in raising the mercurychamber to a nearly-horizontal position, and when this position has been reached the mercury-chamber will tend to keep the governorballs adj usted relative to their pressure and load. As the movement of the pivoted arm G is limited, when the engine is running too fast, the short end of the arm will abut again st the collar of the supporting-frame, so that the roller on the arm F will not bear upon the same.

It will be noted that when the steam-pressure rises or the load decreases the engine will run fast, and consequently the governor-balls move outwardly, and by the movement of the sleeve the rack-bar and segment are operated, causing the weight in the mercury-chamber to shift, thus immediately augmenting the action of the governor in cutting off the steam at the commencement of the stroke, thereby reducing the speed. hen the speed-press ure decreases or the load increases, the action of the governor in increasing the amount of steam admitted to the cylinders is assisted by the weight moving in the opposite direction. The mercury-chamber being formed in the arc of a circle, it may be adjusted upon the shaft (1, so that the variation of speed will be very slight even with a very great variation of the load. 3y means of this device, in connection with a ball-governor, the engine may be started up to its normal speed quickly without fear of its running away.

I am fully aware that prior to my invention it has been proposed to provide as an attachment for ball-governors movable weights and counter-weights, as shown in Patents Nos. 280,984.- and 348,265, and. I do not claim such.

devices. Neither do I claim, broadly, any devices for automatically eifecting a uniform rate of speed irrespective of the work or load to which the engine may be called upon to overcome; but

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

1. In-an attachment for steam-engine governors, a frame adapted to be connected to the standard thereof, said frame having an opening through which passes a rack-bar which engages with the segment attached to a horizontal shaft, said shaft carrying an areshaped chamber containing a shifting weight, said toothed rack also being connected to a rod having a spring, and an arm carryinga roller which engages with a pivoted lever, substan tially as shown.

2. In combination with a governor for steamengines, a rod connected to a vertically-moving part of the governor, the lower end of said bar having a rack-bar, an upwardly-extending rod embraced by a spring, and an arm carrying a roller connected to the depending rod 0, a toothed segment mounted on a horizontal shaft to engage with the rack-bar, said shaft also carrying a weight which extends beyond each side of the center of the shaft cl, and a pivoted lever, the short end of which is adapted to engage with a roller 011 the arm F, a suitable stop for said pivoted arm, and a weight attached to the long end thereof, substantially as shown, and for the purpose set forth.

3. In a steam-engine governor, the combination of the rod 0, connected to and actuated by a governor, a suitable supportingframe carrying a horizontal shaft, a toothed segment secured upon said shaft, so that the horizontal shaft will move in unison with the governor, a single weight or mercury-chamber secured to the horizontal shaft above its center, an arm, F, provided with a roller and a bar, said arm and bar being connected to the rack-shaft, a lever or pivoted arm, G, mounted on the horizontal shaft, the short arm thereof extending beneath the roller, the upward movement of said lever being limited by the frame, the long end of said lever being provided with a weight, the parts being constructed and arranged substantially as shown, whereby the governor in its fluctuations up and down is counteracted.

In testimony whereof I afiix my signature in presence of two witnesses.

\VILLIAM BERWICK.

\Vitnesses:

RICHARD ASHTON, J'oI-IN HARRISON.

ITO

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