US329041A - Valve-governor - Google Patents

Description

(No Model.)

H. F. HODGES.

VALVE GOVERNOR.

No. 329.041. Patented Oct. 27, 18815.

i UNITED STATES PATENT twice.

HORACE F. HODGES, OF BOSTON, ASSIGNOR TO CHARLES F. PAYNE, OF GROVELAND, AND GEORGE H. SPENCER AND CHARLES T. CROCKER, OF

ITCHBURG, MASSACHUSETTS.

VALVE-GOVERNOR.

SPECIFICATION forming part of Letters Patent No. 329,0Ll, dated October 27, 1885.

Application filed June 28,1884. Serial No. 136,310. (No model.)

To all whom it may concern:

Be it known that I, HORACE F. HODGES, a citizen of the United States, residing at Boston, (Charlestowm) in the county of Sufiblk and State of Massachusetts, have invented a new and useful Improvement in Valve-Governors, of which the following is a specification.

My invention relates to an improvement in that class of governors which are actuated by centrifugal forcej and it consists in the employment of weights attached to the back of a beveled gear or a disk, said weights being adapted to be forced away from the center of the gear or disk by centrifugal force as the gear or disk is rotated. The said weights are attached by means of connecting-links to the Valve-rod of the engine,thus forming a togglejoint at their junction with the valve -rod, which latter,with its connected valve, may rotate with the gear or disk. WVhen the engine is at rest,or going at a low speed, the weights are held toward the center by means of a spring acting upon the toggle-joint, and as the speed increasesthetoggle-linksbecomestraightened, thus contracting the spring and causing the valve to close.

Referring to the accompanying drawings, Figure l is a top or plan view of a governor embodying my invention. Fig. 2 is a side view of the same. Fig. 3 is a vertical section of Fig. 2, the dotted lines showing the position of the links and weights when the valve is closed.

A represents a bevel-gear, or it may be a disk, upon which the governor is supported, and having an axis, A, adapted to revolve in a suitable bearing.

B is the valve-rod,which is to be connectedto a valve, and is made cylindrical, square, or polygonal in section, and fitted to slide in a corresponding bearing, A, in the center of the aXis A of the gear A.

Attached to the rod B, and forming a part of the same, are lugs or ears 0 C, to each two of which are hinged or pivoted the links D D, radiating from the center. The outer ends of the links D Dare hinged or pivoted to ears e a, similar to ears 0 C on the weights E E, the said links thus forming a toggle-joint.

E E are weights or metal blocks,whioh rest on the back of the gear A, and are each provided with a groove on one side and with a lug or ear, F, on the opposite side.

G G are studs secured to the gear A, and on these studs are pivoted or hinged the linksH H, which latter are likewise hinged to ears F F of weights E E.

I I are guides secured to the disk A, and are made with projections which fit loosely in the grooves in the weights E E, as shown in Fig. 2, and are for the purpose of preventing the weights from leaving the back of gear A.

K is a coiled spring surrounding the valverod B, and bearing at one end against the stuffing-box L, and at its other end upon the ears 0 O, and serves by its action upon the togglejoint to draw the weights E E inward when the engine is at rest or going at a low speed. The operation is as follows: The gear A is to engage with a corresponding gear on the main shaft of the engine from which it receives its motion. When the engine is at rest, or running below the desired speed, the parts are in the position shown by the full lines in the drawings. As the speed increases beyond the desired rate the centrifugal force generated by the increased speed causes the weights E E to move away from the center, thus straightening the toggle-joint links D D,as indicated by the dotted lines in Fig. 3, and forcing the valve-rod B inward, thereby closing the valve and checking the speed of the engine. As the speed decreases the spring which has been compressed now expands and serves to overcome the centrifugal force, and thus between the two actions a uniform speed is maintained. I have shown and described four weights as connected with the valve-rod; but only two,or any number in excess of two, may be employed, subject to the condition of a proper distribution to insure the required equilibrium. The 0 governor may also be attached to one side of a disk in cases where the gear is not required to give it the proper revolution.

The weights E E may be maintained in position by means of lugs I I on both sides, thus dispensing with the links H H if found desirable.

What I claim as my invention is 1. A valve-governor consisting of aseries of weights supported upon a rotating disk and capable of a radial movement, each weight being connected by a single separate link to a central valve-rod adapted to move longitudinally, so that the said links will form a toggle-joint 'at their union with the valve-rod, substantially as specified.

2. In a valve-governor, a series of weights arranged radially upon a revolving disk and connected to a central valve-spindle by means of links which form toggle-joints at their j auction with the said valve-spindle, the said weights being maintainedin position by means of j ointed arms, so as to allow them to move radially when the centrifugal force exceeds the resistance ofa spring acting on the toggle-joints to draw the weights toward the valve-stem, substantially as set forth.

3. The combination of the disk A,the weights 20 E E, links D D, ears or lugs G G, e e, and F '13, links H H, studs G G, rod or spindle B, and spring K, substantially as and for the purpose set forth.

In testimony whereof Ihave signed my name 25 to this specification in the presence of two subscribing witnesses.

HORACE F. HODGES.

Witnesses:

J. H. ADAMS, E. PLANTA.

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