US989456A - Reversing-gear and speed-changer for steam-engines. - Google Patents

Description

T. T. WAGGONER. I REVERSING GEAR AND SPEED CHANGER FOR STEAM ENGINES.

APPLIOATION FILED H13. 9, 1911. 989,456. Patented Apr. 11, 1911.

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LHOMAS T. WAGGONER, OF WARD, SOUTH DAKOTA.

Specification of Letters Patent.

Patented Apr. 11, 1911- Application filed- February 9, 1911. Seria1 No. 607,666.

To all whom it may concern:

Be it known that I, THOMAS T. \Vnoooxnn, a citizen of the United States, residing at Ward, in the county of Moody and State of South Dakota, have invented a new and Improved Reversing-Gear and Speed- Changer for Automatic Cut-Off Steam-Engines, of which the following is a clear, exact, and full description.

The object of my invention is to provide a new and improved reversing gear and speed-changer for steam engines having automatic cut-off, arranged to permit the oper ator to conveniently reverse the engine by means of an ordinary reversing lever, and to control and change the speed of the engine while the latter is running.

The invention consists principally of a pivoted eccentric carried around on its pivot by the driving shaft of an engine, the said eccentric being connected by the usual strap and rod with the engine valve, and said eccentric being controlled in its swinging motion from a weighted lever pivoted on a support attached to the driving shaft.

Reference is to be had to the accompanying drawings, forming a part of this specification.

Figure 1 a side elevation of the improvement. Fig. 2 is a side ele *ation showing parts left out in Fig. 1. Fig. 3 is a transverse section showing a ring-ccccntric and its connected parts. Iiig. 4 shows more plainly the parts over which the spring is coiled.

On the main driving shaft of the engine is secured a wheel B, on one side of which is secured studs B and B forming fulcrums for a weighted lever and an eccentric, respect vely. Weighted lever B is fulcrumed at 13 having slotted links B and B, pivotally connected at B The eccentric C has arranged on one of its faces lugs C and C said lugs having pivots C and C, respectively, engaging slots in said links, as given in detail in Fig. On the outer end of arm B is held a weight 13*, adapted to swing toward and from the main driving shaft A, which will be readily understood by reference to Fig. 3. A sliding collar G on shaft A passes through an opening in said eccentric which is sufficiently large to allow the eccentric to swing back and forth freely across the driving shaft. From one face of the eccentric C extends an arm C, pivotally connected on the face of wheel B at stud B Thus the arm C and eccentric C swing from -stud B and as the shaft revolves, the said eccentric is carried around at its fulcrum with the said shaft A. The eccentric is engaged at its periphery by the usual eccentric strap, and connected by an eccentric rod with the valve of the engine, so as to govern the movement of said valve to regulate the admission and exhaust of steam.

From Fig. 2 it will be seen that on one face of theeccentric arm C is mounted-a lug D said lug having a bolt E passing through the same at an angleof forty-five degrees from the line of the stud B.

E, E", E and E are parts combined to form a lever, said lever having one of its ends pivoted to the eccentric arm C -adjacent to its fulcrum B", a fork at the other end engaging an annular groove G .of sliding collar G the said lever in two parts, one having a round projection E the other a sleeve E surrounding said round part, and movable thereon longitudinally and rotatively. The said collar G is adapted to be shifted longitmlinally on the main shaft by a shifting lever D, preferably made in the shape of a bell crank lever and having its arm D connected with annular groove D in said collar.

In Fig. 2 it will be seen that the pivots B and E are rigidly connected with one another, and so angularly related as to cause the eccentric C to move back and forth across tll jlltllll shaft A, and the collar G as said collar is moved back and forth longitudinally on the said shaft.

In Fig. 3 it will be seen that by applying pressure to the body of the eccentric C* on one side, that the stud mounted on lug of the opposite side will engage pivotally the end of its respective slot in one of the links 13 or B, and that to change said pressure to the opposite side of eccentric from that described, will engage the opposite stud and slot, thus the engine is reversed; and it will be seen in Fig. 2 that when the slot in one of the links B or B is caused to engage its respective stud, that the stud o the oppos'ue side of the eccentric will be free to naive back and forth throughout its slot.

In Fig. 1 it will be seen that the hollow rod E surrounds the solid rod E, and is arranged to pass freely back and forth over the same; that the slots F and of the said hollow rod are arranged to correspond or i more or less, as desired by the operator.

It will be seen in Fig. 4 that the pins movably mounted in the slots of the hollow and solid rods are free to pass back and forth throughout the length of their respective slots, and as the spring presses the pins r against the ends of slots in the said rods, the

said rods are caused to move alike as the operator moves the reversing lever over the segment; and as the speed increases, and as the weighted lever is caused to move out ward by centrifugal force, the spring is pressed, as the distance between the pivotal ends of the two said rods lengthens, or shortens, as the case may be, owing to the direction which the engine is running.

The bell crank lever D is fulcrumed at D", and the arm E of said bell crank lever pivotally connected by rods E and E to a reversing lever E adapted to engage a notched segment E to lock the said reversing lever in any desired position.

'lhe operation is follows: \Vhen the several parts are in position as illustrated, the engine is set in motion, and the speed increases, then the weight B of the wei 'hted lever B will swing outwardly, owing to the centrifugal force on revolving of the wheel B, on which the said lever is fulcrumed. The outward swinging motion is limited by the studs C and U engaging the slotted links B and B, respectively, so that the eccentric is shifted relative to the shaft A, according to the speed of the engine; A similar movement in the inverse direction takes place in case the speed of the engine decreases below the normal rate of speed, so that the eccentric isagain shifted to open the valve of the engine to the fullest extent to admit as much steam as possible, so as to cause the engine to again assume its normal rate of speed. Now, it will be seen that when it is desired to reverse the engine, the operator manipulates the reversing lever E" by throwingit either up or down so as to move thehollow rod E in' like direction, and thereby cause the spring E to act on the rod E, and said rod to act on the arm E of the bell crank lever B, to impart a swinging motion to the same. The swingingmotion of the said bell crank lever is transmitted by its arm I) to the collar G so that the latter is longitudinally shifted on the main driving shaft A, and as the said collar connects with fork E and E, the latter receives a spring-relative to the governor swinging motion relative to the main driving shaft while revolving with the same,

causingihe sleeve E and the fork: to inipart a swinging motion longitudinally, while "the eccentric arm and the eccentric are caused to swing transversely. It will further be seen that by the operator swinging the re versing lever only ashort distance from its center on the segment he is enabled to apply spring pressure in either direction with only such force as would be desired for the required speed, by using different resistance B, in such a manner as to cause the "valve of theenglne to cut off sooner or later, as the case may require.

against the centrifugal force of the weight;-

. It will thus be seen that the device shown m and described not only forms a sehsitive and accurate governor for regulat ng the, speed of the engine, but-1t also affords a,;..

means of conveniently reversing the. engine while the same is running, and a means for changing the 'spced by using different notches which changes the pressure of the Having thus fully describedmy' inveu;

Letters Patenttion, I claim as new and desire to secure by i l. A device of the class described, coin-.

prising a wheel secured on the main shaft of an engine, a ring-shaped eccentric having an arm pivoted to said wheel, said shaft passing through the center openingofthe said eccentric and eccentric thereto,

of said eccentric and its fork engaging 'a.

a weighted lever pivoted on thesaidivhcel, f and pivotally connectedw ith' the eccentric a forked lever angularly pivoted to the arin collar'mounted to slide on the said driving, shaft, and controlling the movement of said I forked arm, substantially as described,

2. A device of the class described, coniprising a wheel secured on the main driving shaft, a ring-shaped eccentric having an arn'lf pivoted on said wheel, said shaft passing through the center opening in the said eccen tric, a weighted lever pivoted on said wheel p i and pivotally connected with said eccentric,

an arm withfork engaging sliding collar on the main driving shaft and its other end pivoted to arm of eccentric at a point near,

its fulcrum, said pivot being an ularly ZLI",

ranged to move the eccentric transversely as the sliding collar moves longitudinally, sub-, stantially as shown and described. 7

3. A device of the class described compris ing a wheel secured on the main driving shaft, a ring shaped eccentric having an arm pivoted on the said wheel, said shaft passing through the center opening of saidecccntric, a weighted lever pivoted on the wheel and pivotally connected with said eccentric, the said eccentric having a forked arm pivotally connected adjacent to its fulcrum, and said forked arm engaging a sliding collar, said collar mounted to slide on the main driving I tudinal'ly on the with slots and pins, 0

. trio with arm to, with the slot shaft and through the hollowopening in the I 4. A device of the class, described com prising a wheel secured to the main driving shaft, and movable therewith, a ring-eccen projecting from one of its faces, said arm pivoted on, and carried around with said wheel, and movable transversely with said eccentric, back and forth across the main driving shaft, a weight mounted on a lever pivoted "on said wheel, said Weight being movable toward and from the main driving shaft, said Weight and lever having two slotted links pivoted thereranged at opposite sides of the body of said ring-eccentric, thus causing said eccentric to move toward said main driving shaft as the centrifugal force causes the said weight to move away,a lever pivotally connected with arm of eccentric adjacent to its fulcrum, to swing at an angle of that of the eccentric and cause the same to 'movetransv'erselyas the lever moves longishaft, the said lever having at its other end a fork with projections engaging an annular slot in a sliding collar mounted on the main shaft, to move on the same and through hollow opening in eccentric, a bell crank lever with one of its arms engagingsaid sliding collar, and having its other arm pivotally connected with a rod, a hollow rod surrounding and movable over a portion of the other end of the first named rod, a spring coiled around both of said rods, said pins pressing the ends of the spring, in a manner to oppose the centrifugal force of the weight, to regulate the speed of the engine, and a reversing'lever pivotally connected with said hollow rod for the purpose of reversing the en ine and to control the speed of same by app pressure to the eccentric and thence to the weighted lever, substantially as shown and described.

5. A device of theclass described compris ing a main driving shaft with a wheel secured thereon, and caused to revolve with 7 the same, said wheel having pivoted thereto a weighted lever, and annovable eccentric, said eccentric pivota-lly connected with the the faces of the eccentric endsljengaging studs 'arforty-five degrees from direction which it shown and described.

. reversing ying spring weighted lever bytwo slotted links, the slots and limiting the'niovement of same, a forked lever pivotally'conne c'ted with, and near the fulcrum of an arm extending from one of with for'kbf said arm engaging annular groove in sliding col lar mounted to move longitudinally ,on main shaft and through hollow opening in the edin said links engaging the body of eccentric,

centric for the purpose of moving said eccentric back and forth transversely across the main shaft while running. 7

6. A means for actuating a swinging eccentric across the 7 engine, for the purpose of reversing the same, and'regulating the speed while running, comprising areversing lever, an acmain driving shaft ofan tuating spring coiled around the body of two rods of which one is longitudinally movable within the other, a bell crank lever, a sliding collar having end of a lever, said lever having its other end pivotally engaged with the arm of the eccentric, said pivotal engagement being arranged at forty-five degrees angle from the swings, substantially as "7. A mechanism for reversingan autoin engagement forked matic cut-ofl" steam engine While running,

comprising a'wheel secured to the driving shaft, having two studs mounted thereon, a

ring-eccentric with an arm, aweighted lever,

slotted links connecting said weighted lever with body of eccentric, a sliding collar movably mounted on" the main driving shaft and connected by an angularly pivotedlever with eccentric arm, adjacent to its fulcrum, a bell crank lever engaging a sliding collar mounted on the main driving shaft, a hollow rod supporting a solid rod therein, said rods pivotally connecting said bell crank with a lever, a spring coiled around the bodyof both of said rods, having cups and movably mounted pins pressing the said spring, thus the mechanism is capable of applying sprin'g-pressure to either'side of thebody of said eccentric, and to resist the den trifugal force ofthe Weighted lever, substantially as shown and described.

7 THOMAS T. WAGGONER. Witnesses:

L. B. Dswrrr, Born F. SHERMAN. i

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