US383267A - Governor for steam-engines - Google Patents

Description

(No Model.) 2 Sheets-Sheet 1.

J. B. ALLFREE.

GOVERNOR FOR STEAM ENGINES.

Patented May 22, 1888.

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WITNESSES, wave 'nfia .dttorney,

(No Model.) 2 SheetsSheet 2.

J. B. ALLFREE.

GOVERNOR FOR STEAM ENGINES.

No. 383,267. 7 Patented May 22, 188B.

WITNESSES 1w VEJV'TOR c ta N PETERS. Phmo-Lilhographer, Washingkm, D. C.

UNITED STATES JAMES B. ALLFREE, OF INDIANAPOLIS, INDIANA, ASSIGNOR OF ONE-HALF TO ROBERT SI-IRIVER AND HARRISON SIVARTZWELDER, OF OUMBER LAND, MARYLAND.

eovERNoR FOR ere/immerses.

SPECIFICATION forming part of Letters Patent No. 383,267, dated May 22, 1888.

Application filed September 1,1857. Serial No. 248,554. (No model.)

To @ZZ whom it may concern:

Be it known that I, JAiuns B. ALLFREE, a citizen of the United States, residing at Indianapolis, Indiana, have invented new and use t'ul Improvements in Governors forSteam-Engines, of which the following isaspecification.

My invention relates to certain new and useful improvements in governors for steam-engines, and has for its object to provide a'siinple [O and cheap device which shall be effective and durable in operation; and with these ends in view my invention consists in the peculiarities of construction and combination of parts here inattcr fullydescri bed and specifically claimed.

In order that those skilled in the art may fully understand my improved governor, I will proceed to describe its construction and operation,referring by letters to the accon'ipanying drawings, in which-- Figure 1 is a back view Fig. 2, a crosssection on the line a" of Fig. 1; Fig. 3, a front view showing the actuating-plate and valve eccentric. I ig. l is a plan view of the pins employed to connect the actuatingplate with the camlever, and Fig. 5 is a plan view of one of the stud-bolts employed to steady the actuating-plate.

Similar letters denotelikc parts in the several views.

I first construct a pulley-shaped casing, A, having a web, I connecting the rim thereof to the hub G. On opposite sides of thehub of the casing, near the inner portion of the rim, I provide two circular openings, into which I place the projecting hubs of two cam-levers,

D, having washers a secured thereto to hold said hubs in place, each lever having a curved slot, E, arranged eccentrically to the center of its hub, weights F, attached to the outer ends of the levers, and springs G, attached, preferably, about midway between the center of the weight and the hub, and connected at the other end by an adjusting-screw to the rim of the casing.

In the web of the casing I further provide in the line of its center two parallel slots, H, one on either side of the shalt and opposite to each other, into which I introduce pins (see Fig. 4) having a square portion, I, neatly fitted in said slots and adapted to slide therein. 0 On one end of this pin is a round portion, I&, having fitted thereon a nut, L, for the purpose of securely fastening the pins to a sliding or movable plate, M, to which is adj ustably fitted the valve-actuating eccentric N by means of 5 cap-screws a, passing through slots, as seen at Fig. 3. The other end of the pins beyond the square portion I make round,as'seen at O,Fig. 4., and journal thereon curved blocks P,as seen in dotted lines, Fig. 1', adapted to fit snugly into the curved slots E of the cam-levers and to have movement throughout the entire length of the slots. I also provide this outer end of the pins with a washer, Q, and nut It, for the purpose of holding the several partsln place. 6

In the sliding or movable plate M, at right angles to the points where the pins are fastened, I provide two slots, S, one on either side of the center parallel to its line of movement, through which and into the web of the casing ya I securely fasten stud-bolts T, (see Fig. 5,) having nuts and washers U on their outer ends, for the purpose of holding the movable plate in place and allowing it to have free movement.

IVhen the engineis setin motion,the weights 7 5 are thrown outwardly from the center by con trifugal force, at the same time causing the rotation of the canrlevers in their bearings in the web. As the canrlevers are rotatcd,their eccentric portions bear against the pins connected to the movable plate to which the eccen trio is attached, moving them along the slots in which they are set, thus moving the eccentric transversely across the shaft in a straight line.

As the speed of the engine is reduced, the springs which counterbalance the centrifugal force ofthe Weights, acting upon the weighted levers, tend to reverse the movement or the cam-levers, thus restoring the parts to their normal position. v

IVhat I claim as new, and desire to sccu re by Letters Patent, is-

1. In a centrifugal governor, two weighted levers pivoted to a suitable casing on opposite sides of its center and provided with eccentrically-eurved slots, in combination with counteracting-springs, a valve-actuating eccentric,

and suitable means of connectiomwhereby the said eccentric may be actuated and the valve regulated by the centrifugal force of the weights, substantially as described.

2. In a centrifugal governor, the va1vc-actuating eccentric fitted, as described, to an actuating-plate, M, in combination with two cam- ]evers pivoted in the web on opposite sides ofable casing attachable to the driving-shaft, two canrlevers pivoted in the web of said casing on opposite sides of the shaft, weights adjustably attached to said cam-levers, adjustable counteractin gsp rings attached to the weighted cam-levers and to the casing, a movable plate sliding in suitable guides and carrying a valveactuating eccentric, and suitable studs or pins attached to said plate and adapted to slide in slots in the web of the casing and in the camlevers, all substantially as described, so arranged and combined as to operate as set forth.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

JAMES B. ALLFREE.

Witnesses:

E. EVERETT ELLIs, CURTIS LAMMOND.

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