US311921A - Reversing mechanism for engines - Google Patents

Description

2 Sheets-Sheet 1.

(Model.)

B. SOHEIDLER.

REVERSING MECHANISM FOR ENGINES.

No. 311,921. Patented Feb. 10,1885

2 Sheets-whee; 2.

(ModeL) R. SGHEIDLER.

REVERSING MECHANISM FOR ENGINES.

N0. 311,921. Patented Feb. 10, 1885.

I kg

T FT FlFl REINHARD SCHEIDLER, OF NE\VARK, OHIO.

REVERSlNG MECHANISM FOR ENGBNES.

SPECIFICATION forming part of Letters Patent No. 311921, dated February 1O 1885.

Application filed September 11, 1se4. (Model) To aZZ whom it may concern.-

Be it known that I, REINHARD SQHEIDLER, a citizen of the United States, residing at Newark, in the county of Licking and State of Ohio, have invented certain new and useful Improvements in Reversing Mechanism for Engines; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable otherss'killed in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters and figures of reference marked thereon, which form a part of this specification. 7

My invention relates to improvements in reversing devices for engines, the object being to dispense with the complicated and expensive link-motion, and the single and double eccentric gearings connected with the main shaft for this purpose. This device differs from those heretofore used as substitutes for the gearing before mentioned, in not being applied directly to the main shaft or to an cecentric on the latter, but is connected with and forms a part of the free end of the crank and its connection with the valve-rode The free end of the crank, instead of the usual boss, has an elevated annulus encircling the center pin, with two holes therein equidistant from the center, and on the outside of this and engaging therewith is a hand-wheel with an annular recess in the hub of the same, which engages with the elevated annulus on the crank when the two parts are put together. The hand-wheel is used to throw the valve from one port over the otherin reversing, the same as a. hand-lever attached to the valve-rod in a locomotive-engine. The center pin is rigidly secured in the crank, and the hand-wheel is pivoted thereon, so as to turn freely in reversing the motion of'the crank. The valverod is pivoted upon a hollow wrist-pin, which lat ter extends through the hub of the handwheel. A loosely-fitted pin extends through the wrist-pin of the valve-rod at a point over the recess and annulus, and engages alternately with holes in thinibles in the annulus when reversing the crank. These holes are at the proper relative distance from the center on each side of the latter) to give the required throw to the valve. A spring-lever on the end of the valve-rod, operated by hand, is

used as means to raise the loose pin out of each hole to allow it to engage the otherin reversing the motion. V

Figure 1 is a perspective view of the crankwhecl end of the main shaft of an engine with valve-rod connection in which my improve ment is embodied. Fig. 2 is a side elevation of the same with the valve-rod and its wristpin removed. Fig. 3 is a side elevation of the reverse side of the hand-wheel and valve-rod, and shows the annular recess in the hub of the same. Fig. 4c is an end elevation of the crank with the hand-wheel removed. The elevated annulus which engages with the recess in the latter is shown in this figure. Fig. 5 is a section of the valve-rod and hand-wheel with the crank out through line as, Fig. 3, to show the holes in the latter and their relation to the engaging pin. Fig. 6 is an elevation of the center pin and nuts enlarged. Fig. 7 is an elevation of one of the steel bushes which form the holes in the crank.

A is the main shaft; B, the crank-wheel on the end of the same. 0 is the crank pin or wrist connecting the end of the pitman-rod O thereto. D is the crank, and on the outside of the free end of this,concentric with the hole a, (for the center pin,) is turned an elevated annulus, d, as seen in Fig. 4. Over this part of the crank the hub F of the hand-wheel E is fitted, the latter having a circular recess, d, therein with which the annulus cl engages. These parts are held together by the center pin, a, upon which the hand-wheel E is pivoted.

The hub F is counterbored for the head of the centerpin, and the latter has a keyway, it, cut therein, which, when the pin is inserted in the hole a, engages with a fixed key, k, in thelatter and prevents the pin from turn ing. The center pin is made long enough to project beyond the crank, the projecting part being reduced in diameter and threaded and provided with a movable and astationary nut, n and n. The latteris fastened diametrically on the end of the center pm by a split pin, a", as seen in Fig. 6. I The shoulder on the center pin is intended not to be quite flush with the outside of the crank, so as to allow nut n to be used for adjustment to take up any wear and to clamp the hub F and the crank tightly together when the IIlOlJlOll of the engine is v the inner end of the loose pin 6 slides around on the top of the annulus d on the crank D,

and through the crank in the line of the an-' nulus are bored two holes at the proper relative distance from the centerof the pin a (one on each side of the latter) for'the throw of the valve from port to port,which may be at: tached to rod'G. These holes are bored tapering from the inner side of the crank outward, in the direction ofthe handwheel hub,)

their axial lines being parallel with that of the pin a, Into each of these holes is fitteda long tapering threaded steel bush or thimble, h, having a straight holeJJ, therein of corresponding size with the loose sliding pin 6, which is seen engagedwith the hole 15in the bush h on the left in Fig. 5. The pin 6 is grooved circumferentially below the head for the forkf on the end of the spring-lever a, which loosely straddles the pin 6 at this point.

Extending from the pivoted end of rod G,

and in line therewith, is a fixed piece, b,which forms, in connection with the loosely-pivoted section a, a handle for operating the pin e. Ears c 0 project laterally outward from the fixed part b, and between these is pivoted the spring-lever a, near the middle of the same.

This lever is slightly bent near its pivotal point to allow its handle part to remain elevated by means of the spring 0, this latter being a flat steel spring bent in the form used in latch-levers. A groove in the fixed part 12 allows the spring to fall therein when the latchlever is operated.

It will be noticed by reference to the figures that when the lever a is pressed toward b the pin 6 is elevated until it is clear of the top of.

the annulus d. This can easily be performed by the hand whilethc engine is running. 'lo reverse the motion of the crank D, the pin e is raised out of the hole 1' in thethimble h on the left, Figs. 2 and 5, by the operator grasping spring-handles a b and pressing them together,and. at the same time holding the wheel E from turning, until the crank travels far enough to allow the pin a to drop into the hole t in the thimblc h on the right, when the motion of the crank D is reversed, and it rotates in the opposite direction. The thimbles or bushes h h are made tapering, and are threaded about one-half their length from the head, in order to secure them firmly in the crank. These bushes are made with either a squareor hexagonal head to allow. them to be screwed totheir places by means of a wrench. They are in this way made detachable, and

inexpensive, and can be readily applied upon any engine in which a crank-motion is used.

I claim as my invention- 1. In a reversing device for engines, the combination of the crank provided with the steel-hushed holes, the center pin, an annulus formed on said crank concentric with the latter, the pivoted hand-wheel provided with a channel in the hub of the same engaging said annulus, the hollow wristpin, the valve-rod.

connected therewith, the loosely-fitted pin extending through said wrist-pin adapted to engage said steel-bushed holes in the crank, and the pivoted springlever on said valve-rod engaging said loosely-fitted pin, and adapted to operate the same, as set forth. 7

2. In areversing device for engines of the class described, the combination of the main shaft, the crank-wheel, the crank, a center pin in the free end of the latter, a wheel pivoted thereon, with a tongue-and-groove connection between the hub of the latter and the crank concentric with said center pin,- the steel bushes in said crank, the valve-rod, the hollow wristpin on which the latter is pivoted, the loosely-fitted pin extending through said wrist-pin, and means for operating the latter by which it is disengaged from one of said bushes and caused to engage with the hole in the other in reversing the motion of a said crank and shaft, as set forth.

3. In a reversing device for engines of the class described, the combination, with the crank-wheel, of a crank provided with the two holes in the free end of the same, a fixed center pin in the latter, an annulus concentric with said center pin formed on said crank, the holes in the latter being in the line of said annulus, a hand-wheel pivoted on said center pin, having a channel concentric with and adapted to operate the latter,substantially as set forth.

4. In a reversing device for engines, the combination,with the crank-wheel, of a crank having a hand-wheel pivoted on the free end of the same, said crank being provided with two holes at the proper relative distance for the throw of the valve from the center pin of the same, detachable steel bushes inserted in said holes, the hollow wrist-pin attached to said pivoted hand-wheel, the loosely-fitted pin therein circumferentialiy grooved below the head, the valve-rod pivotally connected with the latter and provided with an extended part in line therewith, and the pivoted spring-lever attached to said extended part, its fork end engaging the circumferential groove in said looselyefitted pin, and adapted to disengage the latter from one of the bush-holes in the crank to allow it to engage the other as the latter is partially rotated, for the purpose set forth.

5. In combination, the crank provided with the annulus on the free end of the same concentric with its center, a hole in said annulus on either side of the latter, said holes being at points embracing about one-third the circumference of said annulus, and in a separate horizontal plane from the axial line of the center pin, the hand-wheel with a circular recess in the hub of the same engaging said annulus, the center pin connecting said hand-wheel and crank together and pivoting the former upon the latter, the hollow Wrist-pin, the valve-rod, the loose-sliding pin within said wrist-pin, and means for operating the same, whereby it is disengaged from one hole in the annulus and engaged with the other to reverse the motion of the engine, substantially as set forth.

6. The combination of the crank provided with an annulus and holes therein at the proper relative distance from the center and from each other, the hand-wheel having a circular recess engaging said annulus and pivoted to said crank, the hollow wrist-pin, the valve-rod pivoted thereto, the sliding pin within said wrist-pin, ,and means for operating the same, whereby it is engaged and disengaged alternately with the holes in said crank in reversing the motion of the engine, substantially as set forth.

7. The combination, with the valve-rod, the reversing devices,and the crank, of the handwheel, pivoted on the latter and adapted to be used as means for operating said valve-rod to throwthe valve from one port over the other in starting the engine, as set forth. 8. The combination, with the crank, the hand-wheel, and the engaging and disengag- REINHARD SGHEIDLER.

Witnesses:

B. G. CONVERSE, COLLIN FORD, Jr.

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