US358297A - Engine-governor - Google Patents

Description

(No Model.)

A. D. QUINT.

ENGINE GOVERNOR.

Patented Feb. 22, 1887.

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ALANSON D. QUINT, OF HARTFORD, CONNECTICUT.

ENGINE-GOVERNOR.

SPECIFICATION forming part of Letters Patent No. 358,297, dated February 22, 1887.

Application filed November 9, 1886. Serial No. 218,432. (No model.)

T 0 all whont it may concern:

Be it known that I, ALANSON D. QUINT, of Hartford, in the county of Hartford and State of Connecticut, have invented certain new and usefullmprovementsin Steam-Engine Govern ors, of which the following is afull, clear, and exact description, whereby any one skilled in the art can make and use the same.

My improvement relates to the class of governors in which the centrifugal action of revolving Weights is employed to control the movement ofthe admission or cut-0E valves of an engine; and the object of my improvement is to provide a'governor of this class that shall be comparatively regular in its action in spite of any resistance offered to the movement of the valves or connected parts, as bythe change in friction of an ordinary slide-valve or of shocks or sudden strains upon the eccentric or other connected parts.

In the governors of this class as ordinarily constructed the unequal friction of the valves and any sudden strain on the eccentric orconnected parts will cause a vibration of the governor-weights, and such vibrations are by my within improvement avoided.

My improvement consists in the combination of centrifugal weights secured to levers pivotally attached to a rotary structure, one of the said Weights being larger in mass'than the opposing weight, the same being combined with connecting-links and a movable eccentric or like part. I a

It further consists in the combination of the rotary frame with the levers pivoted thereto and the opposed centrifugal weights of unequal mass and the centripetal springs, and in details of the several parts and their combination, as more particularly hereinafter described, and pointed out in the claims.

Referring to the drawings, Figure 1 is a plan. view of a device in which my improvement is embodied in connection with a pulley and a sleeve that forms the means of connection with the eccentric, Fig. 2 is a view in central section of the device on line or w of Fig. 1.

In the accompanying drawings, the letter a denotes the governor-case, in thisinstance the flange of a pulley; Z1, the shaft to which the said pulley is secured, as by the means of the key b, driven into a socket between the shaft and the hub of the pulley in the usual manner.

"Within the governorcase, that is formed in the pulley on the side opposite the hub b is attached a sleeve, 0, that extends along the shaft, and is connected with the eccentric or an equivalent device for moving the valve of an engine to which the governor may be connected.

To lugs formed on the wall of the case are pivoted the levers d and d. On the free end of the lever d, which is the end nearest the center of the case, is secured a governor-weight, c, the lever being adapted to swing radially in the plane of the case in the manner common in centrifugal governors of this class. This lever d is connected to one end of the lever d by means ofa link, f, while the other end is pivoted to the inner side of case at a point substantially diametrically opposite the point to which the end of the lever d is connected to the case. 7

The weight 6 is secured to this lever d at a point near its outer end as by means of a bolt that passes through a slot in the lever, this means of connection making the weight adjustable along the lever, the bolt and nut serving as a means of clamping the weight at any desired point within the limit ofits movement. This weight e is considerably less in mass than the weight 6, and the latter is also adjustable along its lever, the set screw serving as a means of securing the weight to the lever at any desired point within the limit of its movement.

The lever d is pivotally connected to the sleeve 0 by means of the link f and suitable pinsj andf Thelatter pass through the lugs c, that are fastened to or are a part of the sleeve. The spring 9 is connected at one end to the lever d and at the other end to the wall of the governor-case, and its function is to resist the outward movement of the weight e, and in this it supplements the work of the weight 0. The weight 6 being at the end of a lever equal in length to that which supports the weight e, its tendency to be moved toward the periphery of the case by the revolution of the latter would be the same as the tendency of the weight 6 to move toward the periphery of the case if the two weights were equal in mass; but as the weight c largely exceeds in mass the weight 6 the former will move outward to a certain positiomwhich it will maintain at a given rate of revolution of the case, provided that remains constant. This weight 0 is held in a given position by the resistance to the further outward movement due to the centrifugal pull of the weight 0, conveyed to the weight 0 through the medium of the connecting-linkf and lever d, and this resistance to further outward movement of the weight 0 is supplemented by the resiliency of the spring 9, the latter, however, being but a small part of the whole resisting force. The outward movement of the weight e causes, by reason of its connection to the lever (1 by the linkf, the latter lever to move toward the center of the shaft, and this movement of the lever d pushes the sleeve 0 and retates it upon the shaft I) through the medium of the link f. The free end of the flat spring h presses against the sleeve in such manner as to resist the movement in the direction last spoken of, while the base of the spring is secured to any convenient part of the case, and the function of this spring is simply to take up or counterbalance any resistance of movement due to the friction between the connected parts. In order to avoid any tendency to unequal revolution due to the arrangement of the several parts, I make use of a counterbalanceweight, i, that is secured at any convenient and appropriate point within the case. By using a weight so arranged that its centrifugal force shall oppose the centrifugal pulling of a larger weight to govern and in part control the movement of the latter I gain an advansmaller weight to the movement of the larger weight is a positive force as compared with the usual form of resisting or centripetal springs.

It will be observed that in connecting the levers (Z and (l' by means of the links the several points of pivotal connection are-so arranged that an outward pull on the weight a would be multiplied several times when it reaches and effects the rotary movement of the sleeve.

Now it of course follows that any resistance to the rotation of the sleeve or tendency to a return movement of the sleeve, which may be caused by frictional resistance of the valve or of any connected parts, would be resisted to a degree that would greatly obstruct any change in the radial position of the governing-weight. In this feature of opposing centrifugal force by centrifugal force by weights of unequal mass, and in the peculiar joining of the system of lovers that tend to the stability of the system in operation, I make a considerable gain and practically prevent the objectionable vibration of the governing-weights present in prior devices.

I do not limit myself to thepeculiar and exact combination and arrangement of the parts herein shown, as the weights and levers may be increased in number and in pairs, and in case two sets of similar construction to the within described are arranged side by side and in reversed order, the counterbalance- 3 on opposite sides of their connnon center of [25 weight may be dispened with,and other changes may be made that embody my improvement without departing therefrom.

I claim as my invention- 1. In a centrifugal governor, the combina tion of opposing governor-weights arranged on opposite sides of the center of revolution of the weights, the said weights being of unequal mass, the weight-snpporting levers, the sleeve or like part of a valve-operating mechanism, and the links pivotally connecting the levers and the rotary sleeve, respectively, whereby the outward-moving tendency of the weight due to centrifugal force is opposed by the other weight in the system, all substantially as described.

2. In combination with the governor-case, the levers (l and (7., pivoted therein, the link f, connecting the said levers, and the link 'f, connecting the lever d and the sleeve 0, the sleeve 0, and the spring y, all substantially as described.

3. In combination with the governor-case a, thelcvers d and d, pivoted thereto and moving in the plane of rotation of the case, the weights 0 and c, of unequal mass, and attached, respectively, to the levers (l and d, the connect ingrod f, the link f, the sleeve 0, and the springs l and 71, that resist the outward movement of the weight 0, all substantially as described.

4. In combination with the case a, the levers outer ends the adjustable weights 0 and a, re spectively, the connecting-rod], pivoted to the lover (1, between the weight and the point of pivotal connection of said lever with the case,

and to the lever d, the sleeve 0, rotary upon [05 the shaft I), and the link f, connecting the said sleeve with the lover (I at the point between the pivot of said lever and its point of connection with the rodf, all substantially as described.

5. In a centrifugal governor, the combination of the vibrating governor-weights arranged on opposite sides oftheir center of revolution, the weightsupport-ing levers pivoted to the governor-case, the link pivotally [[5 smaller in mass than the opposing weight, all I20 substantially as described.

6. In a centrifugal governor, the combination of the opposing and vibrating governorweights of unequal mass, pivotally supported revolution, and the within-described system of levers and links, whereby the outward movement of one of the weights from the said center is opposed by the centrifugal force of the opposite weight, all substantially as described. 1 0

, d and d, pivoted thereto and bearing on their tage, in that the movement or resistance of the It

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