US957886A - Centrifugal governor. - Google Patents

Description

0. JUNGGRBN 6; F. W. BENTLEY.

GENTRIFUGAL GOVERNOR.-

APPLICATION FILED JULY 29,1907.

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a m 7 1 1\ 43 d3 5 .22 M 0 02 m |l|||1| I O ma 2% 7 I f w a a U mg g w mm 5 e 7 w w o t m v@ v m 0. JUNGGREN & F. W. "BENTLEY.

GBNTRIFUGAL GOVERNOR. APPLICATION 1-11.31) JULY29,1 907.

Patented May 17, 1910. 2 snnnw'ssnnn*r z.

n 8 E w ,wu r 6 WWW? fiw w o n B. 7 u n a u e 5e a fi c d s m or a i 7% w 4 oscnn JUnacEEn awn mmw. BENTLEY, or scnENEcTanY, NEW YORK, nssrenons To- GENERAL ELEcTEIc COMPANY, a'conronarron-or nEw roan;

CENTRIFUGAL GOVERNOR.

Specification of Letters Patent.

Patented May 1W, 121W Application filed July 29, 1907. Serial No. 385,961.

To all whom it may concern:

Be it known that we, OSCAR JU'NG REN and FRED W. BENTLEY, citizens of the,

:United States, residing at Schenectady,

county of Schenectady, State of New York, have invented certain new and useful Improvements in Centrifugal Governors, of which the followin is a specification.

This invention relates to devices for regulating the speed of a steam turbine or other elastlc fluid engine by automatically controlling the supply of such elastic fluid.

' The invention is an improvement upon out in the claims.

"to make this frame'in the shape of a In the accompanying drawings, Figurel is a vertical sectional view of a governor embod ing our invention; Fig. 2 is a detail view ilustrating the action ,of the weights; lFi 3' is a cross section of\the combined swlvel and universal joint between the connection rod and the overnor beam; Fig. 4 is a sectional plan new of the same with the ball bearings removed; Figs. 5 and 6 are cross sections of. the gimbalrmg. I

v0n the upper end of an upright shaft 1, driven by the turbine or other engineis mounted a frame 2 secured in place by a lrey 3 which is fastened by a set-screw 4 tapped into the hub 5 of sald frame. We prefer pot having cylindrical walls and partially closed by an annular lid 6, on which are erected a plurality of columns 7 which support an annular top plate '8.

tension spring 9 concentric .with the axis of the shaft 1. vScrew-threaded,plu s 10,

11 are screwed ,into its upper and ower ends. The upper lug 10 1s counter-bored from below, and t e resulting shoulder 12 has a, spherical surface to cooperate with a hardened steel spherical-faced collar 13 suitably mounted'on a screw-threaded sleeve 14' 1 which extends u through the annular topplate 8 and mes as with the tension-adjustlug nut 15 resting on said plate. A key-16 1s attached to said top-plate and engages with a longitudinal groove in .said sleeve to prevent it from rotating relatively to the frame. A, stud 17 in said sleeve engages with a longitudinal groove 18 in the sprlng plug 10 to prevent relative rotation between said sleeve and plug. The lower springplug 11 supports a centrall disposed block 19 from which a T-shape hanger 20 de-' pends through a hole in said plu On the arms of, he han 'er are suspended links 21, which are provided at each end with knifeedge bearings; For convenience of repair and removal, these knife-edges are made removable from the links, as shown at 22, 22' in Fig. 1.

The governor weights 23 have knife-ed e fulcrum blocks 24 which rest against t e under side of fulcrum plates 25 secured to the pot-lid 6. The weights have u wardl projecting hooks or arms 26 provided wit bearing blocks 27 which engage the knifeedges 22 at the lower ends of the links 21.

The bearing blocks 27 are located at such a distance above the fulcrum blocks 24 that when the weights have swun out to their normal running angles, as shown in Fig. 2, the knife-edges 24 on the fulcrum blocks and the knife-edges 22'on the lower ends of the links are all in a horizontal line. In this position also the centers of gravity of the wei hts stand in the samevertical planes right angles to each other, the shortening of one of them bears a constant ratio to the shortenig of'the other, irrespective of the degree and their arms 2'. e. constant. In other words, the leverage throu which the weights act upon the spring is constant, and as the tension of the spring is constant the movement of the lower spring plug is exactly )roportional to the changes in the f angular movement of the weights centri ugal force exerted by the weights, due

to changes in speed. These movements of the spring plug are communicated by means I ots is hung a gimbal ring, 0

of a connection rod 28 to the overnor beam 29. The lower end of the ro is connected by a universal joint 30 to the block 19.. The rod passes up through the sleeve 14 and its u per end is swiveled to the-beam by means of a'device which also includes a universal joint, so that perfect freedom of movement is insured. The construction which we prefer, to use is shown in Figs. 3 to 6 inclusive.

' The governor-beam has a fork 31 in which are secured pivots 32 preferably made with small shanks 33 inserted'through the arms of the fork from the inside to prevent their working loose and falling out. On said pivwhich is preferably made in upper and wer halves 34, 35 rabbeted together and secured by screws 36. The ring has diametrically opposite bearings 37 for the pivots 32, and at right angles thereto the diametrically opposite bearings 38 for the trunnions 39 which are attached to the swivel'casing 40. The gimbal rin is made in halves to enable itto be applie to the pivots and trunnions after they have been put in place in the fork and the casing. Said casing is a cylindrical cup-shaped receptacle having a central hole to permit-the rod 28 to pass up through it. The casing has an upwardly rojectmg sleeve 41 concentric with the r0 to prevent the escape of lubricant from said casing.

On the upper end of the rod 28 is secured a petticoat 42 which drops down over the lppara tus shown is onl illustrative, and" sleeve 41 and has a circumferential flange 43 in the plane of the pivots 32 and trunnions 39. A ove and below said flange are ball bearings comprising balls 44 running in raceways conslsting of rings 45 locate on the upper and lower sides of said flan e, a bottom ring 46 resting on supporting u 47 in the casing 40, and a top ring 48 lie (1 in an annular lug 49 screwed into the to of theca'sing. 3 cover 50 keeps out dust an other foreign matter. These ball. bearings enable the rod to rotate easily while the gimbal ring insures freedomof movement of the governor beam without danger of bind ln accordance with the provisions of the patent statutes, wehave described the principle of operation of our invention, together with the apparatus which we now consider to represent the best embodimentth'ereof;

but 'we' desire to have it understood that the a t at the invention. can e carried I out by other means.

' What we claim as new and desire to secure by Letters Patent of the Umted States, is,+

1. A wei ht for a. eentrifu al governor in ,which'the ne joining the center'of gravity is at right angles to the line joining the fulcrum with the point at which the weight exerts its effort.

crum with the 2. A Weight for a centrifugal overnor in which there is a constant ratio Eetween the vertical .distance of the center of gravity from the fulcrum and the horizontal distance from said fulcrum of the point at which the weight exerts its effort.

3. A centri ugal governor comprising a spring and weights and means whereby said weights exert a constant leverage on said sprin at all points in their movement so that t eefi'ective movement of the governor is exactly proportional to changes in centrifugal force due to changes in speed.

4; A centrifugal governor which rotates about a given axis, comprising a frame, an axially arranged spring, pivoted weights located on opposite sides of the axis, knifeedge pivots between the weights andthe frame, and means connecting the weights with the spring, there bein knife-edge pivots between the weights an said means, and said pivots and weights bein so constructed and arranged that the line oining a frame pivot with the center of gravity of the adacent weight is at right an les to the line joining sald frame ivot an the pivot between the wei ht an said means.

5. A centrifugal governorcomprising a rotatable shaft, a frame fixed on said shaft,

he combination with a governor beam, of a rotatable rod, and a combined swivel and universal joint connecting the rod and beam, said jointincluding a member universally mounted in the beam, and a second member carried b rotatably mounted in the rst member.

8.- The combination with a governor beam, of a rotatable rod, a bal 'oint supported by said beam, an

a ba -bearing swivel for the rod in the same plane as the pivots of the gimbal.

9. The combination with a overnor beam, of a gimbal ring ivoted to said beam, a swivel casing pivote in said ring, a rotatable rod concentric with the ring and casing, and ball-bearings in said casing supporting the rod.

, 10. The combination 'witH a forked governor beam, of a gimbal ring made in upper andlower halves, pivots for ring havlng small shanks inserted into the arms of the fork from the inside, and a swivel casing the rod that is I amass having trunnions, said pivots and trunnions being received in bearings in the halves of said ring. 4

11. The combinationv with a governor beam, of a rotatable rod a casing having 'an upright sleeve concentric with said rod, a petticoat on said rod dropping over said sleeve, a flange on said pettlcoat, ball-races on said flan e, ball-races supported in said casing, and alls in said races.

12. A centrifugal governor-comprising a frame, a spring, a plug screwed into one end of the spring, a member on the frame b which the plug and the attached end of the spring are supported, a spherical joint be tween the plug and the su porting member, weights pivoted on the aim, and means connecting the weights with the other end of the spring, said weights and connections being so constructed and arrangedthat the line joining weight 'with its center of gravity is at right angles to the line joining said fulcrum with the point at which fect on said means.

, said opening,

the fulcrum or pivot of a f the weight exerts its ef- 13. Acentrifugal governor com rotatable shaft, a frame mounte on the rising a plug mounted provided with a central 0 ening, a sleeve mounted on the frame an projecting into there being a spherical joint between the lug and the sleeve, a second plug mounted in the other end of the spring, weights ivoted on theframe, means connecting t e weights with the second plug, a governor beam, an axially arranged rod connecting the second plug and the beam, that asses outwardly through the sleeve to said eam, a universal joint between one end of the rod and the lug, anda combined universal and swive l end of the rod and the beam.

In witness whereof, we have hereunto set our. hands this 26th day of July, 1907.

' OSCAR JUN GGREN FRED W. BENTLEY. Witnesses:

BENJAMIN B. HULL, HELEN Onronn.

joint between the other in one end of the spring and

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