USRE11516E - Scraper - Google Patents

Description

2 Sheets-Sheet 2.

W. DAVY. SQRAPER.

Reissued Dec. 3, 1895.

UNITED STATES PATENT OFFICE.

WILLIAM DAYY, OF KENOSYHA, WISCONSIN SCRAPER.

v SPECIFICATION forming part of Reissued Letters Patent No. 11,516, dated Decemberl, 1895.

Original No. 5114,645, dated-February 13, 1894. Application for reissue filed October 1, 1895. Serial No. 564,344.

.To all whom it may concern.'

Be it `known that I, WILLIAM DAVY, a citizen of the United States, residing at Kenosha, in the county of Kenosha and State of Wiscousin, have invented a new and useful Improvement in Scrapers, of which the follow-- ing is a specification. v

My invention relates to an improvement in the class of so-called Scrapers, the same being inthe nature cf scoops or buckets adapted to cut and become filled with soil by dragging them upon it in a manner to cause them to penetrate lthe same, and which are further adapted to be hoisted and carried by machinery between the points of filling andi. dumpingfan'dto be dumped of theirrcontents by backward tilting.

My object is kto provide a scraper which shall be especially serviceable yfor'sewer-exeavations and which shall afford a material improvement in the class referred to in the way of details of construction and combina` tions of parts, whereby, among other advantages, the device shall be adapted to cut readily through veI-y hard as well as the softer soil, to break up the soil in filling, thus to adapt it to discharge the more readily, and to be dumped automatically. g

In the accompanying drawings, Figure l shows my improved scraper in side elevation. Fig. 2 is a plan view of the same. Fig. 3'is `a sectiontaken at the line 3 on Fig. l and viewed in the direction of the arrow. Fig. 4 is a perspective view of a colter detail. Fig. 5 is a sectional view taken partly at each of the lines 5 on Fig. 2 and viewed in they direction of the arrow. Fig.v 6 is aviewi-n the lia-f ture of a diagram to illustratethe relation of the trip mechanism of the scraper when about to be dumped to the boom.

A is the body of thescraper, comprising, preferably, a single piece of sheet-steel bent' to forniz'gsides r'and a bottom fr' and open at its forwardand rear ends.

B is the'baok for the body portion, having fastened to it the rearwardcxtending guidinghandle q, and which is in turn fastened rigidly to the side bars p p of the supportingframe, which bars extend above the sides/r of the body A beyond the forward end thereof.` C is the plow or cutter comprising a steel plate bent to conform to the cross-section of the body A, inside of which it fits, being fastened at its side portions o to the sides 'r of the body neariits forward end, where. said sides extend forward beyond the bottom r', so that the rear edge of the base Q'of the plow 'shall abut againstv the forward edge of the bottom r', being also thicker than the latter,

the adjustment being such as to render the junction flush on the lower surfaces of the parts 1^ and o and `aord anv offset ozacross the rear upper edge of the latter. It will be noticed that the base o' inclines downward and forward somewhat to give to the plow a tendency to penetrate the soil at its forward edge,where it is provided with'teeth t, sharpened on their edges, and the side pieces o of the plow are also sharpened by outward beveling from their inner surfaces along their forward edges, ltoward which they are caused to flare somewhat tr, extend laterally beyond the width ofthe body port-ion A to out somewhat wider than that width and thus induce a tend- ,ency the better to crowd the plowed soil into the scraper.

D D are brackets, of generally triangular v shape, pivotally fastened at one of their angles, as at to the opposite sides' r and o of the body portion and plow, and to the upper rear angles of the brackets are fastened the forward ends of the sides p, the latter and the angle -brackets thus forming the frame on which the plow-carrying body portion ispivotally supported at near its forward end.

I make the pivotal connection :r adjustable to l adapt the pivots to be set in any one of a series ofvertical holes m', thereby to lower or raise the-connection at will, according to desire, in regulating the extent of penetration by the draft of the plowteeth into the soil. Thed'raft is applied to a`pulley n, journaled in4 bearings n', extending forward from a shaftm, with which they are pivotally connected at their rear ends, the shaft being adjustably fastened at its opposite ends in segmental slots m', provided in the forward portions of the angular brackets D, and affording a medium for the regulation of the draft.

Between the frame sides p, near the transverse center of the body A, is a cross-bar Z, from which extends upward a bearing k, having journaled in it the suspension-pulley t',

and the bearing k carries a rearward-extend- IOO socket h', in which is confined a vertical spring-controlled plunger E. This plunger ing arm h, terminating in a vertical guideis pivotally connected from its vlower end, through the medium of a crank-arm g2, iwith a rock-shaft g, journaled in bearings g', which 'project backward from the sides p of the' frame, the rock-shaft carrying near its opposite ends dogs f to engage catches f', rigidly fastened in proper position to the inner surfaces of the sides r.

F is a species of dividing-shoe approximately V-shaped in cross-section, as shown in Fig. 3, and of somewhat similar shape in longitudinal section, as shown in Fig.` 5, being preferably hollow and provided with a flat base, at which it fits against the offset o2, beingfastened to the upper surfaces ofthe bottomr' and plow-base o to extend across the `junction between the two lengthwise of the center of the body portion A nearly to the lforward end of the central plow-teeth t. On the shaft m, near its opposite ends, are fastened 4folto-rs G, each being bent transversely of its shank portion sufficiently inward to bring its cutting-foot portion e in line with the space between the central plow-teeth t and the tooth flanking it. As means for rigidly holding the colters in the various positions of adjustment of the shaft m, I provide a series of recesses v in the near edges of the Shanks of the colters to admit rigid stops t in proper position on the bracketsD.

The operation of the device is as follows: It is suspended in the usual or any suitable manner to adapt it to be raised and lowered on the boom of a hoisting-machine (see Fig. 6) at its suspension-pulley i, and from the pulley/n it is connected, through the medium of the' cable d, chain, or the like with the winding mechanism of the machine in any suitable or well-known manner. Thus the scraper is adapted, as usual, to be lowered to the soil to be scooped and dragged along the same to loosen and fill itself therewith and thereupon be hoisted and carried to the point of dumping. In thus dragging the scraper the advance cutting of the soil is performed by the cclters, and the plow C thereafter iinishes the loosening, while the dragging of the scraper causes it to lill with the loosened soil, which is considerably broken up ory divided by the alternate engagement of the colters and plow-teeth. Inv the scraper, however, the central divider F still further breaks up the soil as it fills into the same, wherein it is in such a thoroughly broken-up condition that its discharge from the scraper is greatly facilitated. When the scraper has been Silied, it is hoisted and caused to travel by the dragging mechanism to the point atwhich it is desired to discharge the contents. nere the scraper is raisedtill the plunger strikes the boom, and the consequent dee' `ien of the plunger withdraws lthe dogs w 'the catches f', thereby ri :seing the to enable it to tiltbackward on its. pivotal support ai, free from the back B, and dump the contents. Thereafter when the scraper is again lowered into its filling position by resting at the bottom fr on the vground the dogs f will automaticallyre-engage the catches f' and lock the body portion A to the supporting-frame.

What I claim as new, and desire to secure by Letters Patent, is-

1. In a scraper, the combination with the body, of a plow C at the forward end thereof and having the downwardly inclining bottom and the outwardly flaring cutting sides, substantially as described.

2. In a'scraper, the combination with the body, of a plow C at the forward edge thereof and having the downwardly inclining bottom provided with teeth and the outwardly fiaring cutting sides, .substantially as described.

In a scraper, the combination with the l body A having its sides extended beyond the forward end of its base, of a plow C at the forward, end thereof conforming to the crosssecticn of ythe body and fitting and fastened between said side-extensions and abutting at its base againstl said forward end of the base of the body, the base of the plowinclining downward and forward and having teeth at the sides thereof flaring outward on their inner-'surfaces and affording cuttingedges, substantially as described.

4. In a scraper, the ycombination of the body-portion A having, at its forward end, a plow C adapted to cut along its forward vertical edges and provided with teeth t on its base, colters G supported in advance of the plow to alternate with said teeth, and a central dividing shoe F on the bottom of the scraper, substantially as and for the purpose set forth.

5. In ascraper, the combination .of the body-portionA A having, at its forward end, a plow C formedwith upright sharpened sides o, flaring outwardly toward their cutting edges, and a base o having' teeth t, colters G supported in advance of the plow to alternate' with said teeth, and a central dividing shoe F cn the bottom of the scraper, substantiallyas and for the 'purpose set forth.

G. In a scraper, the combination of the body-portion A, a frame having side-bars p carrying the hack B .and to which said bodypc-rtion is pivo'ted near its forward end, means by which to suspend the scraper to said frame, and automatic dumping-means comprising pivotai dog and catch mechanism and a spring-plunger E connected with the dog and adapted to be actuated, ail substantially as and for the purpose set forth.

'7. In a scraper, the combination of the body-portion A side-catches f', and a plow C at its fcrward end, a frame comprising the side-bars p, carrying the back B, and the angle-brackets D on which said body-portion is pivetaiiy supported near its'forward IOO IIO

end, coIters G adjustably supported on said 'Whole being constructed and arranged to 0pbrackets and a drag-pulley n connected thereerate Substantially as described.

with, a, suspension-pulley c' in a bearing k extending from the sides p and provided with WILLIAM DAVY. 5 a socket-bearing extension h, a spring-plun- In presence ofv A gerNE in said socket-bearing, and pivotal dogs J. N. HANSON,

f connected with the spring-plunger, the J. H. LEE.

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