US287822A

US287822A - gabdneb

Info

Publication number: US287822A
Authority: US
Publication date: 1883-11-06
Anticipated expiration: 1900-11-06

Description

(No Model.) 2 Sheets-Sheet 1.

R. W. GARDNER.

GOVERNOR.

No. 287.822. 7 I Patented Nov. 6, 1883.

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2 SheetsSheet 2.

R. W. GARDNER.

(No Model.)

GOVERNOR;

Patented Nov 6, 1883.

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per part; Fig. 4, a sectional plan on line 2; and

UNITED STATES PATENT O FICE.

ROBERT IV. GARDNER, OF .QUINOY, ILLINOIS, ASSIGN OR TO THE GARDNER GOVERNOR COMPANY, OF SAME PLACE.

GOVERNOR.

SPECIFICATION forming 1 To all whom it may concern.-

' ors for steam-engines, &c.

The invention will be understood from the following description, in connection with the accompanying drawings, in which Figure 1 is a front elevation of a governor embodying ,my improvements; Fig. 2, a sectional front view of the upper portion of the same online I); Fig. 3, a side elevation of up Fig. 5, a side elevation, viewed from a position to the left of Fig. 1, of a portion of the governor exhibiting the construction of the speeder. I

In the drawings, A represents the governorvalve body; B a housingsecured thereto, to

sustain the moving parts; 0, the pulley-shaft of the governor; D, a bevel-gear on'said shaft; E, a bevel-gear driven thereby, F, a stiff tube with its lower end rigidly secured in the housing in line with the axis of the governor-valve; G, a hub 'fitted to revolve on said tube, and

f having a step-bearing around the tube upon the top ofthe housing, and having formed with it the bevel-gear E; H H, fiat springs projecting upward from hub G, and having their lower ends secured rigidly therein; I, a

collar surrounding hub G, and serving as a means for securing the springs H to the hub; J J, spherical weights attached to the upper ends of springs H; K K, forks secured to the upper end of springs H, and sustaining pins on which the weights are free to revolve; L, a top sleeve fitted to revolve and rise and fall .upon the upper end of the tube F; M M, a pair of arms formed with sleeve L'and projecting radially therefrom under and in a position to support the weights J; N,"a top cap screwed upon sleeve L; O, a stem from the governorvalve reaching upward throughtube F to cap N; P, a forked lever engaging the valve-stem part of Letters Patent No. 287,822, dated November 6, 1883, Application fired August 22, 1883. (No model.)

' engages the valve-stem; S, a bushing in lower end of tube VF, fitting fairly upon the stem 0, which is smaller than the bore of the tube; T, a head secured to the upper end of stemO within the cap N; U, a lubricating thrustdisk, of rawhide or similar material, interposed between the roof of the cap and the top surface of head T; V, a collar fast on tube F above hub G, to prevent the rising of the hub upon .the tube; W W, peripheral grooves in weights J engaging arms M; X, a doubleended lever on outer end of shaft Q; Y, asetscrew through lever X above its axis, and pointing toward shaft 0; and Z, a fiat spring bolted to the bearing of shaft 0 and bent over fied by a radius of changinglength. The arms M, instead of being curved to conform to the natural'path of theweights, are curved, speaking in a general way, into arcs of greater radius. As a consequence, the weights in moving outward pull the sleeve downward, and thus push the stem Odownward and effect a certain closure of the valve.

The tendency of spring Z, acting through.

cut-off.

The distance to be moved by the weights in effecting the full valve movement having'been determined, the governor is arrangedto run at such speed about as will maintain the weights ina position corresponding to half their outward movement; or, the speed having been fixed upon, the strength of the springs H is modified toproduce the same effect. Adjusting the set-screw Y changes the resistance of the valve to a downward motion, and thus increases the resistance to the action of the gov- IOC ernor-weights; but at the same time this adjustment does not act with full effect in adding to or lessening the centripetal force of the weights. The device may be likened to a fixed nut and rotary screw, in which rotation of the screw results in rectilinear motion of the screw; but rectilinear motion imparted to the screw has little or no effect in producing rotation of the screw. The effect of the adjustment at Y, which forms the speeder of this governor, is to alter the effect of the governor without materially altering its forces of action.

The curve of the arms M has been referred to as being such asto cause a vertical movement of the sleeve as the weights move. Further than this, the curve is a variable one, as shown, whereby a given degree of travel of weight near the outer extremity of its stroke will produce more vertical motion in the sleeve, &c., than the same degree of weight travel will produce when further inward. The weights thus become more effective as they move outward, and by proper regulation of the curve of the arms the governor can be rendered nearly isochronous. Furthermore, the curvature of the arms may be modified so as to produce any desired reasonable proportion of weight travel to valve travel.

In practice I make the sleeve, with its arms, of malleable cast-iron, and I turn and finish the arms with no curvature. By means of suitable bending and forming (lies I then give to the arms the desired curvature, and this curvature I can modify at any time by bending, so as to adapt the governor to peculiarities of individual engine conditions.

I do not confine myself to arms formed integral with the sleeve, as they may be separably or permanently secured to it if made of separate pieces.

I do not confine myself to malleable arms, as they may be of cast-iron formed to proper curvature by cutting processes.

I do not confine myself to the given arrangement of speeder-sprin g and lever, as the spring may be arranged to act with an adjustable pressure to lift the stem when otherwise arranged, and for permanent speeds noadj ustment of the upward tendency of the valve-stemis needed, and a weight adjustable or notin its effect may take the place of the spring arrangement.

Instead of the springs II serving at once as centripetal elements and radius-bars, I contemplate the possible employment of linked radius-bars with centripetal springs to draw the weights inward. I11 case the arms were made straight instead of curved, and the periphery of the weights, where they roll on the arms, made in cam form instead of circular, the travel of the weights would cause the arms to rise and fall, and would be equivalent to the curved arms in combination with circular weights.

Let it be noticed the stem 0 may be attached to the sleeve so as to both rise and fall with it without the aid of the speeder-spring. This spring may be omitted entirely if an adjustarising and falling element.

There are many well-known forms of mechanism applied to governor construction to transmit avertical motion to the governorvalve, and I contemplate the utilization of any such found suitable in connection with the new features of my invention.

I claim as of my invention the followingimprovements in governors:

1. The rolling weights, the springs H, or equivalent means forurging the weights inward and preventing their vertical displacement, and the sleeve with its curved arms, combined substantially as and for the purpose set forth.

2. The rolling weights, the springs H, or equivalent means for urging the weights inward and preventing their vertical displacement, and the sleeve with its variably-curved arms, combined substantially as and for the purpose set forth.

3. The rolling weights, the springs H, or equivalent means for urging the weights inward and preventing their vertical displacement, and the integrally-formed sleeve and arms of malleable iron, combined substantially as and for the purpose set forth.

4. The rolling weights, the springs H, or equivalent means for urging the weights inward and preventing their vertical displace ment, the sleeve with its arms, and the adjustable speeder-spring or its equivalent arranged to resist the vertical movement of the sleeve, combined substantially as and for the purpose set forth.

5. The shaft Q, the levers X and P, and the bent spring Z, combined substantially as and for the purpose set forth.

- ROBERT XV. GARDNER.

lVitnesses:

HENRY L. PORTER,

L. C. NEUSTADT.