US318019A - Samuel pennock - Google Patents

Description

S. PENNOCK.

RoAD GRADER.

(No Model.)

WITNESSES:

INVENTOR K, f f m i UNITED STATES PATENT OFFICE'.

SAMUEL PENNOOK, OF KENNETT SQUARE, PENNSYLVANIA, ASSIGNOE T O THE S. PENNOOK & SONS COMPANY, OF SAME PLACE.

RoAD-GRADER.

EPECIEICATION forming part ofLetters Patent No. 318,019, dated May 19, 1885.`

(No inodc'.)

To LZ whom, it may concern:

VBe it known that I, SAMUEL PENNooK, a citizen of the United States, residing at the borough of Kennett Square, in the county of Chester and State of Pennsylvania, have in vented certain new and useful Improvements in Road-Graders, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings.

This invention is an improvement in that class of road-grading machines in which a scraper is connected to a frame-work upon wheels-such, for example, as the graders shown and described in` my Letters Patent (reissue) No. 10,023, of January 31, 1882, and No. 270,693, of January 16, 1883.

The invention comprises two distinct fcatures, one of which relates to devices for rais= ing and lowering the scraper, and the otherapplicable to what are known as two-\vlieel7 road-graders-to the combination, with the usual small supportingwheel at the front of the machine, ot' means for elevating said wheel out of contact with-theground in order'to permit the same to evade sods, stones, or other large obstacles in the roadway, or when the latter is generally very rough or uneven, (when otherwise the lifting of the wheel by running over sods, Sie., would raise up the scraper, and thus cause it to temporarily skip its work, so to say,) and for lowering the wheel when the i obstacles have been passed, and for retaining the same in the different positions.

In the accompanying drawings, Figure l is an oblique perspective view from the near side of a two-wheel road-grader in which my present improvements are embodied. Fig. 2 is an off-side elevation thereof. Fig. 3 is a side elevation, enlarged, of the mechanism for imparting vertical movement to the scraper, and Fig. 4. is a section thereof, as on the line a a, Fig. 3, but with the rack and segment thrown out of gear. r

The same letters of reference always mark the saine parts.

S is the scraper, seeured'to the diagonal bar S, which bar is connected to the verticallymovable end bars, V V', that are in turn connected to hand-levers HH', respectively, pivoted on the standards es es', which constitute part of the main frame-work F, which is fastened to and rests upon the axle A of the wheels NV. Either end of the scraperbar,or both ends simultaneously, may be raised orlowered by operating said levers. One of these, H, is shown connected with the scraper-bar in the usual manner. The other, H', has a different arrruigement for operating that end ofthe scraper, which forms the first abovementioned feature of my present invention. Its-object is to provide a means for adjusting the vertical bar V and its operating-lever H' with relation to each other, in order to avoid the necessity of the operator, who stands upon the usual platform at the rear of the machine, (not seen in the drawings,) giving a wide sweep of said lever inorder to raise and depress the bar, and consequently the scraper, under extreme conditions whereby the lever may be adjusted with relation to the vertical bar, as required by the character of theroadway or the contour there= of, so that it will be necessary to turn the Vlever in but a comparativelyshort are, and thus the operator will have better control of the f in other words,

same. I may here state that these devices now to be described are a. modification of devices for a like purpose which are described in a certain application i'or Letters Patent which I have just iiied for improvements in roadgraders, and which was executed by me on the 21st day of January, 188i. The end or' the short arm oflever H is provided with atoothed segment, S S, Figs. 2, 3, and i-, whose teeth or cogs engage with those of a rack, T, upon the vertical bar V', whose lower extremity is con- Inected to the scraper-bar S". Bar V' is` adapted to slide freely in a slot in one of the pieces cY of the supporting-frame F, in such a manner that it is also' capable, under circumstances hereinafter explained, of being moved a short distance to and fro, the lower end of bar V having also a pivotal attachment to the scraper bar. When the rack is released, (by means of the devices hereinafter to be described,) it may be thrown out of gear with the segment, whereupon bar V, and with it the scraper, falls, the latter resting upon the ground. Lever H is then rotated to the desired position, in which it is retained by an ordinary springcatch, that locks into one of the teeth of a curved rack, It, and the rack 'l is then drawn forward by the devices above referred to into its formerposition-il e., into engagement with the segment S S.

The means for attaining the results just mentioned are as follows: An arm, q, secured to the side of the upright fus', to which lever H is pivoted, carries at its free end a shaft or stud, b, that is provided with an eccentric, e, and a small friction-wheel, p, in a slot in an upright, Z, through which also stud bpasses. The upright Z is pivoted at O to the framepiece e. The Said stud has a crank, m, for turning the eccentric, and it is stopped or retained in the two extreme positions by a stoppin, n. "When the eccentric is thrown to the one positionthat shown in Figs. 2 and S--the rack is engaged with the segment, the edge of bar V to which the rack is attached being pressed against by the small wheel p. I make use of this wheel in order that the bar may be moved up and down, when the lever H is rotated when the machine is doing work, with as little friction as possible. Then the cranke., the eccentric-is thrown in the opposite direction, the upright Z is swung out and wheel p moves back out of contact with the bar, whereupon the rack may be disengaged from segment S S, all as seenin Fig. 4, and said lever be turned as required, which done, the bar and rack are `then thrown back into position by rotating crank m, as before.

The other improvement,relating to the raising and lowering of the small supportingwheel J at the frontend ofthe usual. frame of a two-wheel grader,is as follows: Said wheel is iournaled in the lower extremityof a vertical frame, 7c, between the two sides of which the tongue t of the machine passes and is attached to the main frame F. Frame 7.: is braced by bars b, pivoted thereto and to frame F, as shown, and is connected at its upper end to the short arm r of a hand-lever, U, which is pivoted on a lng, y, near the apex ot the main frame F, which, l may state, is of the triangular form common in machines of this class. New, when lever U is in one position--that is,upright-the wheel .I rests upon the ground, but when for any reason-such as previously eXplained-it is desirable to elevate the wheel, the long arm'oi' the lever is depressed, whereby the wheel is elevated, as indicated in Fig. 2. Said lever is provided with a springcontrolled catch, 2, engaging with slots 3 in a segmental rack, G, secured to the frame of the machine, whereby the lever,and consequently wheel J, are retained in the different positions.

I am aware that prior to my invention a castenwheel has been vertically elevated and lowered by means of the short arm of a lever, and a radius-rod parallel to said short arm, the caster-wheel being secured to the lower side of a soeket-piece, the outer end of said arm and rod being pivotally attached to said piece, and also having their inner ends ful ernmed and pivoted, respectively, to a bracket-frame.

I am also aware that a caster-wheel has been raised and lowered by means of a straight lever provided with pendent pivoted pieces on its outer end, in which the wheel is journaled.

Having thus described the construction and operation of my invention, I claim as new and desire to secure by Letters PatentH l. In a road-grader, the combination of the scraper, avertically-niovable bar, as V', eonnected thereto and provided with a toothed rack, as T, a pivoted hand-lever, as H, provided with a segment, as S S, having teeth or cogs adapted to engage with the teeth or cogs of said rack, together with means, substantially as shown, for throwing the rack and segment out of gear and retaining the same in position, substantially as and for the purpose set forth.

2. The scraper, the vertically-movable bar V,conneeted thereto, the pivoted hand-lever, the segment S S, the toothed rack T, the bar q, and the eccentric e, with means for rotating the same and holding it in position, together with the friction-wheel p, all combined, constructed, and adapted to operate substantially as and for the purpose described.

In a roadseraper, the combination,with the inain'triangular frame, of a lever pivoted at the forward end thereof', and a segmental rack also secured thereto, of a vertical frame depending from the shorter arm of said lever, and in the lower extremity of which is borne a wheel, pivoted steadying-braces extending from the lower end of said vertical frame to the sides of the main frame, and the springcatch secured to the longer arm ot' the lever for engaging the rack, whereby the wheel is TOO maintained in position when elevated, substantially as described and shown.

In testimony whereof I have hereunto at fixed my signature this 4th day of February, A. D. 188i.

SAMUEL IENNOCK.

\Vitnesses:

Tues. T. Wonnini., \Vrr..r.\i\r H. PHiLLirs.

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