US457322A - Necker - Google Patents

Description

(No Model.) 2 Sheets-Sheet 1.

0. K. LONGENEGKER. STEAM ENGINE GOVERNOR.

No. 457,322. Patented Aug. 4, 1891.

WZZI/VESSE'S wmw 4 "WW (No Model.) 2 Sheets-Sheet 2.

G. K. LONGENEGKER. STEAM ENGINE GOVERNOR.

Patented Aug. 4,.1891.

cm, Moro-mm, Imam-on, o. c.

'UNITED STATES PATENT OFFIcE.

CHARLES K. LONGENECKER, OF PAINTED POST, NEXV YORK, ASSIGNOR TO THE \VESTON ENGINE COMPANY, OF SAME PLACE.

STEAM-ENGINE GOVERNOR.

SPECIFICATION forming part of Letters Patent N 0. 457,322, dated August 4, 1891.

' Application filed May 29, 1891. Serial No. 394,553. (No model.)

To all whom it may concern: which allows both springs to have their attach- Be it known that I, CHARLES K. LONGE- ment to the wheel on the same side, and ad NECKER, a citizen of the United States, residmits the use of one screw for the manipulaing at Painted Post, in the countyof Steuben tion of both springs to accomplish the sensi- 55 and State of New York,have invented certain tive regulation of governors.

new and useful Improvements in Steam-Enlheinvention further consists in providing gine Governors; and I do hereby declare the for the application of a thoroughly effective following to be a full, clear, and exact descripgovernor to a wheel of much smaller size than tion of the invention, such as will enable othhas been heretofore accomplished, and also to 60 to ers skilled in the artto which it appertains to make possible, from the use of apeculiar form make and use the same. of centrifugally-acting weights, the correct de- This invention relates generally to steamsign of weight-lever; andit consists in the engine governors, and particularly to that parts and combinations of parts hereinafter class of governors known as fiy-wheel govdescribed and claimed. 5 I5 ernors, such as have a laterally-movable ec- In the accompanying drawings, forming centric surrounding the crank-shaft of the part of this specification, Figure I is a front engine, and connected by a rod to the valveelevation of my governor, showing the arstem, by which the admission of steam to cylrangement of connecting-links, springs, &c. inder is regulated through the variation of Fig. 2 is a vertical cross-section of the same. 70 its throw, this variation being effected by the Figs. 3 and 4 are respectively detail front movements ofcentrifugally-acting weights seand side views of my device for regulating cured to levers, which are connected to the the tension of the springs. Figs. 5 and 6 are eccentric, while the centrifugal motion of respectively side and edge views of lever and these weights is resisted by centripetally-actweight, and Fig. 7 a vertical longitudinal secing springs, the free ends of which are attion through weight.

tached to weight-levers, the other ends being Similarletters refer to similar parts throughattached in an adjustable manner to the flyout all the Views. wheel. A represents a skeleton pulley or balance- It has been usual heretofore in this class of Wheel having spokes a connectingits rim with 8: 3 governors when supplied with sensitizing deacentral hub b, rigidly secured or mounted vices to accomplish adjustment of the springs on the main shaft B of the engine. from two points of the wheel diametrically C is an eccentric having an elongated slot opposite. This arrangement is necessarily or opening 0 formed therein,through which awkward, as it necessitates the turning over the main shaft is inserted, said eccentric be- 85 of engine one-half revolution before adjusting formed or provided with flanges d, bement can be effect-ed, which is often almost tween which an eccentric-strap (not shown) impossible. A further disadvantage of the surrounds the body of the eccentric and 0011- usual device is in the unequal tension given meets the same with the valve-rod. The ccto the springs, which often causes one of the centric is provided With a projecting arm D, 9c 40 springs to break from having been made to pivoted at its end to one of the spokes near overcome a larger proportion of the centrifuthe rim of the Wheehso as to support said ecgal force than the other; and a further obcentric and permit it to have a free lateral jection is found in the possibility of incommovement within the compass of its slot 0. To petent engineers adjusting that end of one of the upper edge of the eccentric at its rear 5' the springs which is attached to wheel nearer side an arm E is attached or formed, which to or farther from the pivotal point of its leprojects from said edge at an angle greater ver than the end of the other, thus destroythan a right angle with the arm D, and the ing the governors sensitiveness according to end of said arm having formed thereon a boss the degree of error, which is practically withe, drilled and tapped to receive a pivot-pin f, 100 out limit. I overcome all these objectionable to which is pivoted at the rear side of said features by a simple arrangement of parts, arm D one end of a connecting-link F, the

other end of said link being pivotally secured to the front face of the heel g of the short arm h of the weight-lever G. The lever G, as clearly shown in Fig. 2, is cast with a boss or hub 2, through which it is pivoted to one of the spokes near the rim of the wheel, and from near the outerend of this hub the short arm h of thelever G projects at an angle to the weight-arm j of the lever and inwardly orto- Ward the center of the wheel. By this construction of the lever its arms are caused to operate or swlng in vertical planes distinct from each other, and the short arm h traveling in a path outside of that of the weight -arm j. The weight-arm j is formed on an accurate curve of gradual approach to the pivotal point of the eccentric and has its free end connected with the end of the piston-rod it; of the pis- ,ton of a dash-pot Z, centrally pivoted to that oneof the spokes a to which the projecting arm D of the eccentric is pivoted and between its pivotal point and the eccentric. The short arm h of the lever Gis formed with a heel g at the lower corner of its outer or free end and with a toe m at the other or up per corner. At the opposite side of the eccentric-that is, the side most remote from lever Ga lever G is pivoted through a boss or hub similar to hub t' of lever G to one of 0 the spokes of the wheel at a point near its 40 and in a vertical plane outside the plane of said arm. The end of arm 9' is formed with a boss drilled to receive a pivot-pin 0, which connects with said arm one end of a link H, the other end of said link extending to and being pivotally connected with the toe m of the short arm h of the lever G by means of the pivot-pin s. The lever-armsj and 0 are each provided with an adjustable weight, which will be presently described.

From the above description, and upon reference to the drawings, it will be observed that the weight-arms project from their hubs and pivotal points in the same general direction and toward each other, causing them when. in operation or when thrown out by centrifugal force to swing away from each other and upward instead of, as is customarily the case 111 this class of governors, one swinging in one direction and the other in another, or

one up and the other down, in order to shift the eccentric, which is connected directly. to the levers or weight-arms by rods, so that the centrifugal force of one arm or lever is exerted to pull and the other to push the eccentric in the same direction at the same time.

WVith my construction and arrangement of the parts both lever or weight arms act upon the eccentric to move it in the same direction; but only one of the levers G is connected with the eccentric directly, and that'by means of a link F, pivoted to the short arm projecting from the hub of a lever at an angle, the other lever G being connected to the rigid short arm or lever G by a link whose tendency is to push said short arm downwardly, and thus cause its lower corner or heel to be forced away from the eccentric and in the same direction in which said arm is being moved or swung by its weight-arm j, thus rendering the movements of both weight-arms uniform and steady and relieving the engine from the effects of sudden jerks consequent upon change of load or variation in speed.

To the free ends of the weight-arms of the levers G G, I pivotally attach spiral springs I, at points equally distant from the fulcra of said levers, by means of the clevises or yokes J. These yokes are formed with an annular collar or ring 70', connecting its arms Z, through which one end of the spring I is passed and then riveted over, thus rigidly connecting the spring and nut together, so that the latter will be held immovable against rotation on the screw-rod m when the latter is turned in the ring of the clevis. The other ends of the springs are fitted over the ends of the adj ustable pins M and in grooves formed therein, said pins being cast with heads or lugs N,

having tapped openings therein to receive one end of a right and leftthreaded screwrod P, formed with a hexagonal nut Q at its center, said nut, when the parts are in position, lying in a recess 1.0,formed or cored in the rear side of the spoke a, to which the pins M are adjustably attached. This spoke is cast with the projecting lugs R at each side or edge thereof, in which are formed the longitudinal slots S, adapted to receive and form a sliding surface for the pins M, which are moved back and forth in said slots by the right and left threaded screw-rod P when the latter is revolved. The pins M are reduced at a suitable point, as at ct, between their ends to adapt them to fit in said slotted lugs, and the walls of said reduced portion fitting snugly against the sides of the lugs act as guides for the pins in their movements and prevent them being withdrawn longitudinally from or wabbling in the slots.

From the above description it is obvious that upon turning the nut Q the screw-rod will move the pins M simultaneously away from or toward each other in their respective slots S, according to the direction of revolution of screw-rod, and consequently said pins,

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' the levers to equalize the resistance thereof to the centrifugal force of the weights. As springs of equal size and proportion do not always possess the same resilience, owing to difference in temper and other causes, it is necessary, in order to adjust them with accuracy to the centrifugal force exerted by the weights, to provide means for adjusting the length of the springs to equalize their resistance to the weights at all parts of their movement, such adjustment being required as will cause an extreme movement of the weights when a slight variation in the speed of the wheel occurs. This adj ustment I accomplish by simply turning the n utn of screwrod m, and thereby turning said rod in the nut T, attached to end of spring and lengthening or shortening the same, according to the direction in which the rod is turned, and thus increasing or decreasing its resistance to the centrifugal force of the weights, as desired or found necessary in operation.

The object of the recess 10 in the spoke to which the pins are attached is to prevent any tendency of the screw-rod to move from its set position when regulating the governor, the sides of the hexagon fitting against the walls of the recess, preventing any longitudinal movement of the screw-rod, and were not the recess or some equivalent therefor employed one of the pins would not be afiected by the movement of the screw-rod, and would remain stationary, thus destroying the object soughtequally-divided adjustment of the springs.

My construction of the-device for ad justing the tension of the springs by lengthening and shortening the same enables me to use the same on wheels of less diameter than is possible with any of the usual devices employed for this purpose, and the range of extension of the spring by my device may be as great as the length of the spring itself without requiring extra space for the operation of the same, as the screw-rods enter the spring and pass into the same as it is turned to extend the spring.

In Figs. 5 and 6 I have shown my improved weight W in connection with a weight-arm to illustrate the advantage of the same over weightsof differentconstruction. Theweight, which may be of any desired external shape or formthe shape shown, a disk, being preferred-is formed with a central slot W, in width equal to the thickness of the arm which extends from the periphery into said weight for a distance beyond the center of the same equal to about one-half the width of the weight-arm, and has its bottom W formed on the arc of a circle correspondingto the curve given the inner edge of the weightarm. Aset-screw. B enters a screw-threaded opening formed in the center of the weight and impinges against the side of the lever to hold the weight in place. It will be noticed that although over one-half of the edge of the weight is open and that the weight may be removed without disturbing or disengaging the spring there is no liability of the weight becoming disengaged from the lever when the governor is in operation, as the closed or bottom portion of the slot comes in contact with the edge of the lever-arm nearest center of gyration, and that consequently the centrifugal force of the Weight tends to make contact between itself and the arm all the more positive.

Another advantage I gain by the construction of weight described lies in the fact that I am able to design the weight-arms to correct lines, as a gradual increase in width of arm toward its fulcrum will not interfere either with the attachment of the weight thereto or with its adjustment longitudinally thereon for adjustment of speed.

While I have described and illustrated the preferred construction and arrangement of the different parts of my invention, I do not desire to be limited to the exact construction shown and described for adjusting the ends of the springs simultaneously an equal distance nearer to or farther from the pivotal points of the lever, as many means may be employed for accomplishing this adjustment Without departure from the spirit of my invention; nor do I desire to be limited to the exact construction of the means here in described for accomplishing the correct adjustment of tension of springs in a limited space, as different forms of nuts, yokes, and screws may be used for the same purpose without departure from the scope of my invention nor do I desire to be restricted to the form of weight nor the means for attaching the weights to the levers herein described, as these may be varied to suit the circumstances and'yet be within the spirit and scope of my invention.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. The combination, with a fly-wheel, alaterally-movable eccentric, and pivoted weightlevers, one of which has an arm connected with said eccentric, of springs connected to the free ends of said levers at one end and to the fiy-wheel at their other ends, and means for simultaneously moving said latter-named spring ends in opposite directions, substantially as described.

2. The combination, with afly-wheel, alaterally-movable eccentric having an arm pivotally secured to said wheel, an arm projecting at an angle greater than a right angle with said pivoted arm from said eccentric, and weight-levers pivoted to the wheel at points on the same side of the eccentric, of

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springs adj ustably attached at one end to the wheel on the same side thereof and having their other ends connected with the free ends of the levers, and means for simultaneously adjusting the ends of the springs that are connected to the wheel an equal distance apart, substantially as described.

3. The combination, with a fly-Wheel, alaterally-movable eccentric, and pivoted weightlevers, one otwhich is connected with said eccentric, of springs adj ustably connected with said wheel at one end, and means for connecting the other ends of said springs to the free ends of the levers and adapted to adjust the tension of the springs without change of point of connection to lever, substantially as described.

4. The combination, with a flywheel, alaterally-movable eccentric, pivoted weight-levers, one of which is provided with a short arm at an angle thereto, a link connecting said arm and the eccentric, and a link connecting said levers, of springs connected at one end to the free ends of the levers and attheir opposite ends to the wheel, and means for simultaneously adjusting said last named ends of the springs an equal distance apart, substantially as described.

5. The combination, with afly-wheel, a lat-- erally-movable eccentric, pivoted weight-levers, one of which is provided with a short arm projecting at an angle therefrom and the other with a short arm projecting in a curved line corresponding with the curve ofthe lever, a link connecting said short arms, and a link connecting said eccentric and one of said arms, of springs attached at one end to the free ends of the weight-levers and at their other ends to said wheel, substantially as described.

6. The combination, with a fly-wheel, a laterally-movable eccentric, pivoted weight-1cvers having short arms, a link connecting said arms, and a link connecting one of said arms and the eccentric, of springs adjustably attached at one end to the wheel at the same side of its center and at their other ends to the free ends of the weight-levers, and means for increasing or decreasing the tension of said springs without changing their points of attachment to the levers or to the wheel, substantially as described.

7. The combination, with a fly-wheel, a laterally-movable eccentric, and pivoted weightleve-rs, of springs connected atone end to the wheel, nuts secured to the other ends of said springs, screw-rods having hexagons formed thereon entering said nuts, and yokes pivotally secured to the free ends of the levers and adapted to receive one end of said screw-rods, substantially as described.

8. The combination, with a fiy-wheel, a laterally-movable eccentric, and pivoted weightlevers, of springs pivotally connected at one end to the free ends of the levers, pins ad-' justably secured to said wheel, and means for moving said pins simultaneously in opposite directions, substantially as described.

9. The combination, with a fly-wheel, a laterally-movable eccentric, and pivoted weightlevers, of pins adjustably secured to said wheel and having lugs formed with screwthreaded perforations, a rod having right and left screw-threads cut thereon, and a hexagon atits center of length, and springs having one end connected to the free ends of the levers and the other ends to said pins, substantially as described.

10.- The combination, with a fly-wheel having a recess and slotted lugs formed on one of the spokes, a laterally-movable eccentric, and pivoted weight-levers, of pins having a reduced portion adapted to fit in said slots, and lugs having screw-threaded perforations. a rod having right and leftscreW-threads cut thereon and provided with ahexagomwhereby said rod may be revolved, and springs connected with the free ends of said levers and with. said pins, substantially as described.

11. The combination, with the curved weight-lever of gradually-increasing width, of a weight having a slot formed therein eX- tending from the periphery beyond the center of said Weight and formed with a curved bottom port-ion, and a screw adapted to secure said weight to said lever, substantially as described.

In testimony whereof I affix my signature in presence of two Witnesses.

' CHARLES K. LONGENECKER.

Witnesses:

J ULI AN SCHOLL, FRANK E. BRONSON.

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