US307835A

US307835A - Governor for steam-engines

Info

Publication number: US307835A
Authority: US
Publication date: 1884-11-11
Anticipated expiration: 1901-11-11

Description

(No Model.)

l J. L. BOGBRT.,

GOVERNOR FOR STEAM ENGINES.l

No. 307,885. Patented Nov. 11, 1884.

i? M M32 rnrns PATENT rrrcn.

GOVERNOR FOR STEAM-ENGINES.

SPECIFICATIONformin/g part of Letters Patent No. 307,835, dated November ll, 1884.

Application filed May 8, 1884. (No model.)

To @ZZ whom, it may concern:

Be it known that I, JOHN L. BOGERT, of Flushing, in the county of Queens and State of New York, have invented an Improvement in Centrifugal Governors for Steam-Engine Eccentrics, of which the following is a specification.- i

In steam-engines heretofore constructed the eccentric has been movable automatically by the centrifugal action of a weight, in order that the movement of the valve and the point at which the steam is cut off maybe varied by shifting the center of the eccentric nearer to or farther from the axis of the main shaft in an imaginary line, called the lap and lead line.77

The object of my invention is to simplify the construction of the parts, and to sustain the eccentric by parallel-motion bars connected at equal distances from the center of the eccentric, so that the center of such eccentric willbe moved in a straight line, and this will be effected automatically according to the speed at which the engine is running.

In the drawings, Figure 1 is an elevation of the eccentric and the mechanism connected with the same, and Fig. 2 is a sectional plan View of the same.

The shaft A is rotated by the engine, and the wheel WV is fastened thereon. The eccentric E is of any desired size, and it is provided With an elongated opening for the shaft A to pass'through. The eccentric E is made with arms that extend out from the back part in opposite directions, as at M M, and one of these arms'is prolonged and terminates as an enlargement or Weight. These parts are made integral with the eccentric. The parallel-motion bars R R are pivoted at B B to the arms S of the Wheel XV. The pivots B B- are preferably made as pins passing through holes in the arms and secured to the barsRR, respectively, by clamping-nuts, the pins turning in the holes in the arms S. The parallel-motion bars are connected to the arms M M by the pivot-bolts q g, and the opposite end of the bar It is connected by the pivot-bolt u to the spring G in any suitable manner. I have, however, shown a counter-weight, C, in .the shape of a bow, through which the pivot-bolt u passes, and to one end of which counterweight O the spring G is fastened, and at the other end of said counter-weight C there is a link, D, to the end-of the bar R. The spring G is connected at one end and adjusted by the bolt o, that passes through the Wheel V or a projection thereon, andat p there is a buffer of rubber or similar material around the counter-Weight C, to stop against the pro- `ject-ion 'o on the wheel W, and thereby lessen noise When'the parts come into contact, as they are liable to do when sudden changes occur in the load upon the engine. It will now be apparent that the spring G, acting upon the bar R, moves the eccentric E tothe greatest distance from the axis of the shaft A, and that the valve of the engine thatv is actuated by the eccentric and its rod will receive the largest amount of motion and admit steam to the engine with but little cut-off action. As the-speed of the engine increases, the weight N will be thrown off by the centrifugal action and cause the center of the eccentric to approach the axis of the mainL shaft, and when the maximum speed is attained the motion of the valve will be only twice the lap, and no steam will be adlnitted. In the intermediate positions the cut-off will be in proportion to the speed. Under all circumstances the bars R R will act with the eccentric similar to a Vatts parallel motion, and the center of the eccentric will move toward and from the axis of the shaft in a straight line.

It will be apparent that the counter-weight C and link D might be omitted; but when used the counter-weight C acts centrifugally, as Well as the Weight N, to give motion to the eccentric.

Any suitable spring may be applied as aresistance to the centrifugal force; but I prefer the helical spring shown. I claim as my invention-Y l. rIhe combination,with the shaft A,wheel W, eccentric E, and weight, of the parallelmotion bars R B', the latter of which forms a lever, and the tension-spring G, connected at one end to the lever-bar R and at the other end to the governor-Wheel, substantially as set forth. 2.A The combination, with the eccentric E,

of the parallel-motion bars R R', connected to such eccentric, the counter weight C, the spring G, and the link D, connecting the counter-weight t0 'the outer end of the hat' R, substantially as set forth.

3. The combination, with the pivoted parallei-motion bars R R', of an eccentric, armsupon that eccentric, and a Weight, all integral with the eccentric, and it' spring, substantially 1o as set forth.

4. The combination, With the eccentric and the-,pivotedparallel-motion bars R R, of the spring, the eoiinter-Weight C, connected to the bar R and to the spring, the link D, between the counter-Weight C and bar R, and the means 15 for adjusting the tension of the spring, substantialiy as set forth.

Signed by me this 5th day of May, A; D. 1884.

JOHN L. BOGERT. Witnesses:

GEO. T. PINOKNEY, WILLIAM G. MOTT.