US657321A - Wheeled scraper. - Google Patents

Description

lUNITED STATES PATENT FFICE.

JESSE srUBBsoF MOUNT PLEASANT, IowA.

WHsELED SCRAPER.

srncirrearro forng para of Letters Patent No.' 657,321, dated september 4, 190e.

Application led JulylZ, 1.900.4 ,Serial No. 23,310. (No model.)

provements in Wheeled Scrapers, of which the following is a specification.

My invention relates to selfloading carts or scoops of thetype familiarly known in the art as wheeled Scrapers, in which an invertible scoop is suspended from an axle between a pair of transportation-wheels and is provided with mechanism for lowering the same to a scooping or loading position for` subsequently raising and locking the same in; a substantially-horizontal or carrying po- 4 sition and for finally tiltingbr partially inverting the same to dump the load. Heretofore in scrapers of this type, so far as I am aware, the draft of thel team has been ap-` plied at a point on the scoop forward of and usually a little below the level of the axle, and a common fault. in the practical operation of such scrapers'has been the difficulty and the onerous labor imposed upon both the team and the operator indumping or unloading them. Scrapers now inv use it is nearly impossible to dump the load upon level ground, a slant-ingV dump or incline being required down which to throw it, and so onerous is the labor involved in the unloading operation that the combined strength of two men is often found necessary. The demand, therefore, among manufacturers and users of this type f' scraper for many years has been for aA construction that would lighten the labor of both the operator and the team in unloading and render the latter operation as simple and easy of accomplish ment as the operations of loading and carrying.

The object of my present invention, therefore, is to produce a scraper of this type inf which not only willthe labor of dumping or unloading heretofore performed chiey by the operator be thrown upon the team, but the draft will be so applied as to greatly increase the mechanical advantage under which the power of the team is expended in getting rid of the load. This novel and desii-able resultl have secured by a few comparatively-simple changes in the mechanism Furthermore, in the wheeledi `of thewheeledscrapers now in use, the principal and mostimportant of which consists in changing the position of the application -of the draft from a point forward of or below theaxle to a point well above the axle, whereby, regarding the scoop during unloading as a lever of the third class, not only is the arm z'of the power greatly increased relatively to ,the armof resistance over the Scrapers now `in use, but the angle formed by the arms of power and resistance is likewise largely increased, thereby further increasing the me`` chanical advantage.

Myinvention is illustrated in the accompanying drawings, in which- Figure l is a perspective view of a wheeled scraper embodying my improvements, one wheel being removed to more clearly show the mechanism; and Fig. 2 is a side eleva- Q tion of the scraper as it appears in the dumping or unloading position.

Similar numerals of reference refer to similar parts throughout both views.

1 represents the scraper-box or scoop in the usual form and provided with the rearwardly-'extending side handles 2 2.

y 3 represents the transportation-wheels,tu rning on the spindles 4: of an arched axle 5. Rigidly secured to the rectangular bends of the raxle 5 are the parallel arms or prongs 6 6 of a forked operating-lever 7, which extends rearwardly of the scoop and constitutes the means `for lowering and raising the scoop in the loading operation. At 8 8 I show the sides of the scoop as extended vertically to a point well above the level of the axle, mypreferred means of so extending the sides of the scoop consisting of apair of circle-irons formed integral with or secured to the sides of the scoop approximately centrally thereof and directly opposite each other and straddling` the axle, as shown. The forwardly-projecting ends of the arms 6 6 ofthe operating-lever are pivotally connected, as at9 9, to the said circle-irons S 8,A such connections constituting the means whereby the scoop is suspended fromthe arched axle 5.

10 designates the usual tongue of the scraper, secured at its base in a cross-head ll and having attached thereto the hounds ior draft-bars 12 12, which latter at their rear ends are preferably curved upwardly, as

IOO

shown, and arel pivotally secured at 13 13 inl the tops-of the circle-irons, directly) ot'feriian'di` above tle' arched axle 5. This manner of securing the draft-bars to the scraper-body is of the essence of my invention, as ville more fully disclosed .later in the description of the operation. i

14 14 are a pair of braces to reinforce th draft-bars l2 12, being bolted to the-latter at 15 and secured at or near their other ends on the pivot-bolts 13 13.

By reason of the .fact that the draft-bars engage the scraper-boxj0'1""scoop` at such an elevated position (the topsof the ci-rcle`irns).-. it of course becomes necessary to provide an-v other and lo-wer means of engagement bef tween said, parts in--order to effectthe loadingoperation and to prevent'the' scoop ifrnnl turning over while filling. Tothisyend- I pivot at 16 16 on the draft-bars-l2 a pair of lever-hooks 17 17,. the lower'hookedends of)` which are adapted t'o engage and disengage a pair of pins or lugs 18, securedin-the sidesof the scoop,near the forward"1 endstliereoi.- These lever-hooks 17 17 are connected to-4 gether, seas to operate in unison, by means of a rod' 19, journaled at 2O 2O ontheforosshead 11 and having its upwardlyebentends- 21 2l connected through links 22122 to thelupper ends of said lever-hooks* 17 17.- Whenfso connected, the lever-hooks may ,be ca used1` t`o simultaneo usly engage and disengagethel'iivnsl 18 at willvby.operating{a-lever'23,whichfispiy oted at 2er to the-upwardlyand rearward-ly extending endv of one of the" braceSiIILand is operatively connected to-oneof theleve-r# t hooks 1-7 by means of aco,nn" e'cting,-1-{odi25l-4 In the operating-lever 7 ispi-voted apendent hook 26, which during certainl opera-tions of the scraper is adaptedf to engage' alng or catch 27 onftherear Wal'l=of-. thefcoopea`ndonf the upper face ofV the-cross-head? 11 is'lsecujred an ,upwardly y andf rearward-ly extending spring-hookv` 2S, whichi wheni the scoopisinff the dumping1 position, as show-n in= Fig.-v 2 is adapted to engagea vsim-ilarlug or catch 295,.v also on the rear wall ofthescoop, toprelvent the latter from ,fa-lling back` before its-con; tents are entirely discharged,-

I To the outer face of oneof the circle-irons 8I may be bolted orotherwise secured `a-stop-l pawl orequivalent device 30,.which when'jhe scoop is partially inverted,l as shown in Fig.4 2,. engages the upper edge of the brace 14e-or the draft-bar 12 to limit suchrotary movementof the scoop. Y Having thus described the mechanism o my' iin-proved,` scraper; I Willnow brielyset forth-its mode of operation,-callingattentiom 1K8V The rearwardly-extending..operatingrlef particularly to the improved resultssecuredl by and consequent uponl my novel mede-off applying the draft-of vthe'teamV to theslc'raper.J

When the scraper is to be loadedthelhook 26 isreleased, fromV the catch 27 ,y as/ shown* in Fig; 1 andthe lever 2 3 isdrawn back,v thus`L` causing thefle-ver-irooks- 17 to engage' thjel pinsl 'ver 7 Tis then Y raised by the operator', which hast tjhe'elect oflifckinglith'e archedfaxle 5 on its spindles 4 and lowering the scoop'l into contact with the ground. The rear of the vscfithen elevated more or less by the handles 2 2, so as ,to cause its front cutting A edrg'e or point tov tiakefinte the ground, and

-then by starting4 up the team a load of dirt is scooped up greater or less in amount, according" to the angular poise of the scoop ,relatively to the ground during the scooping or loading operation. When the scraper has xBeen1eaue'd, tneoperaterthen-depresses the operatingleverf'? until the hook 26 engages 4its catch 27, whereby the loaded scoop is ing suspended-tmmkits rearyas well as from bothsidesns` thusV securely heldagainst all dangerofqrocliingorspilling. In thisvcondiplace.v where. it'isd'esired to'deposit#thesame,

for-ward thellever 23 thus disengagitng.I the; lever-hooks 17from the. pins 18.y Byreasomofl the 'fact that the entiredraftlfis@thenfro mthe tops ofA the circle-ironsthe continuedfforward movemen-tfof thel t'eain-` causes the front edge ofthe scoopftfo drop andtakefintothe ground, where upon the continuedA application of the dlraftlt'othe'topsofl the5circle-irons causesfthe scoop to: turno-verenitsfront edge? asa pivot until itassu mesi theposition shown' in: Fig,2,

its ca`tch-29 and-prevent any tendency of` the scoop to, rockbac'kl to horizontal position,

Inv Scrapers of thisvclass; sof far as' I am aware, the draft-'bars have always` beenl secured tofthej sides-ot thel scoop substantially in'lfi-newi-th or below the leveloi' the axle. As: a' resul-tofsuch anarrangement thep'ower ot theteam to invert the scoop dur-ing unloadinggwasapplied at an enormous disad vantage mechanically# botlrbyI reason of the very short levier-age` obtained and alsoi be causeA of the' aacute'nes's ofthe' anglel between thelinesof-'power andof-resistance.` I-nfsuch an-arrang'ementl-he helpof the team'v inV unleading. eountedfor-.very little, andthe labor was almost entirely thrown uponrthe ope-ralto'r, they lifting effort of two strong: m'en onthe'handles 2- 2` often being,'required tolget` thes'coopiover and the load discharged.` My arrangementyenthe other hand,` entirely'l ob- ,Eviatestlrisfaullt By pivoting5 the draft-bars te the sidesot the scoop atfa'pointfwell above 'the axle, as at the tops of the circle-irons I enormously increase the mechanicakadvanftage at which the power of?` thev team isv ex-V ertedlin unleading,becanse',in thevrst-pl'ace, the armof the power isy increased to nearly or quite equal the arm of` resistance, and, in the#` second'r place,V thet angle between the lines Tofpower and oli-resistance isgmuch-less acute `jin: arrangementthan in thosefof the prior l eflortrequired ot the teamin unloadingthan y heretofore,V thus savingwear and1 tear on= the raised entirely f-ree'fr-oxn the ground* andb'e#Y tionf the` loadf is drawn bythe team to the and having arrived therethe operator pushesy `Whereuponthefspringehook28 may takefinto IOO latter, but the 'necessityifor the application of lifting power on the rear of the scoop is practically entirely dispensed with and a boy canA now do thework formerly requiring the time and strength of two men.

Certain minor featu res of construction hereinabove described may be omitted, if desired-as, for instance, the braces 14 14 may be dispensed with where the draft-bars 12 12 are made of sufficient weight and strength, in which case the lever 23 would be pivoted directly on one of the pivot-bolts 13 13. The spring-hook 28 is not absolutely necessary, as my peculiar method of pivoting the draftbars and the Weight of the operating parts forward of the axle will normally tend to keep the inverted scoop in the position shown in Fig. 2. Minor modifications may be made in other parts Lof the mechanism also, so long as the leading feature of my invention is preserved, Which consists in the pivotal connection of the draft-bars to the sides of the scoop at a point well above the axle from which the scoop is suspended.

Havingthus described my invention, What I claim as new, and desire to secure by Letters Patent, is

1. In a wheeled scraper, the combination with the axle and the scoop supported thereby, of a pair of draft-bars pivotally connected to the sides of said scoop above the level of the axle, substantially as described.

2. In a wheeled scraper, the combinationA with the axleand the scoop supported thereby, of a pair of draft-bars pivotally connected to the sides of said scoop above the level of the axle, and means for detachably connecting said draft-bars to the lower front end of the scoop, substantially as described.

In a wheeled scraper, the combination 'with the axle and the scoop suspended therefrom, said scoop havinga pair of vertical extensions on its opposite sides rising above the axle, of a pair of draft-bars pivotally secured in said vertical extensionsat or near their upper ends, substantially as described.

4. In a wheeled scraper, the combination with the axle and the scoop suspended therefrom, said scoop havinga pair of vertical extensions on its opposite sides rising above the axle, of a pair of draft-bars pivotally secured in said vertical extensions at or near their upper ends, and detachable hooks pivoted to the draft-bars to engage the `scoop near its front end during the loading operation, substantially as described.

5. In a Wheeled scraper, the combination with the axle and the scoop suspended therefrom, of a pair of circle-irons secured in the opposite sides of the scoop and straddling the axle, and a pair of draft-bars pivotally secured in said circle-irons above the axle, substantially as described.

6. In a wheeled scraper, the combination with the axle and the scoop suspended therefrom, of a pair of circle-irons secured in the opposite sides of the scoop and straddlin g the axle, a pair of draft-bars pivotally secured in the tops of said circle-irons, a pair of connected lever-hooks pivoted in the draft-bars and adapted to engage and disengage projections on the sides of the scoop, and means for operating said lever-hooks, substantially as described.

7. In a wheeled scraper the combination with the arched axle, of an operating-lever secured to the rectangular bends of the axle, a scoop pivotally suspended from the parallel arms of said operating-lever, a pair of circle-irons secured in the opposite sides of said scoop and straddling the axle, and a pair of draft-bars having upwardly-curved ends piv` otally secured in the tops of said circle-irons,- substantially as described.

8. In a wheeled scraper, the combination with the arched axle, of an operating-lever secured to the rectangular bends of the axle, a scoop pivotally suspended from the parallel armsof said operating-lever, a pair of circle-irons secured in the opposite sides of said scoop and straddling the axle, a pair of draftbars pivotally secured in the tops of said circle-irons, means for applying the draft from the draft-bars to the lower front end of the scoop during the loading operation,and means for securing the scoop in a substantially-horizontal position during the carrying operation, substantially as described.

Signed at Chicago, Illinois, this 7th day of July, 1900.

J ESSE STUBBS.

Witnesses:

SAMUEL N. POND, GEORGE E. HALEY.

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