US839069A - Road-grader. - Google Patents

Description

PATENTED DEC. 18, 1906.

J. W. LANG-PITT.

" ROAD GRADER. APPLI-OA ION 3mm APB,.18.1906..

s SHEETS-SHEET 1.

a sun's-sum 2.

PATEN'TED DEC. 18, 1906.

J. w, LANGFI TT. ROAD GRADBR. nruou xon rILnn APB.18.1908.

' s e e,

' ibial-Z t tgmaly concerni p Bait known that I, Jon Lil-sewn, a

.S, BATENT W GF aiw ABEL, mw'l; QBPADTGBA DEla.

' eitifzen'of'the United-Statearesiding at Adel,

Road-Grader,

- the countyof Dallas and State of Iowa,-

have invented; a certain new; and useful pecification. I v

iTheiobject, of my invention is to provide a -1oad-grader of simple, durable,- and inexpensieve construction-111' which two blades are rqvid'e'd to stand onopposite sidesof the ongitudinal centerof the machine and "at E'acute angles relative to. the line of advance-to scrape earth toward the center of the machine and to provide means for independently adjustin' the bladeaftoward and from the center o the machine, and also, to independently adjust each blade up and down from a poeition engaging the road-surface to a position-at rest above the'machineframe.

A'further obj ect'isto provide means wherethe frame that supports the blades may ifr'eely .tilt relative to the front axle to a "limited extent,v so that the blades andisupporting-wheels automatically accom- Y modate themselves to slight inequalities-in strain iipon either blade. g I v further "object is to provide'ia steering the road-surface without throwing an undue wheel at the. re'arof the machine ca able of being operated to cause the rear en .ofithe machine to advanceoutof line withthe front end, sothat eitherlblade maybe directed to advance more nearly ina lineparal-lel with the 3-5 longitudinal center. of thelmachine to thereby cut more deeply into the ioad-surface- A further object is to. provide improved means jfor-independently tilting the blades .-.to. change the angles'at which they engage the road-surface relative to,a vertical line.

" nation of the various parts of 'the machine ,whereby' the objects ycontemfpjlated are attained, as hereinafter more lly set forth,

pointed out in my Glfi11Ii$, and illustrated the accompanying drawinga in which' Figure 1 Shows a top p1 a Com lete machine embodying my invention, ig; 2 shows a side elevation otsa'me. F g.

"3 showsa front endvelevationvofsame with onset the scrapereblades'throvm to itsele- 7 of Letters Patent. I iatented -a iimmn a'i rnis,190s. Serial No. 312,362 2 of which t he following is a for steering it and raking] and lowering it, and Fig. 5 shows a detallperspec'tive view of a modified form of device for supporting the scraper-blades whereby they 5 may be tilted relative to avertical line. i e 5 Referring to the accompanying drawings, I have used the reference-numeral 10 to mdicate a forward axle, having onits ends the su porting-Wheels 1,1.

he machine-frame comprises two parallel center beams 12,extendingl the ,full length of the machineand projecting over the axle 10 and-in frontlofit, the tongue-13 being ivoted between theforward ends thereof. i mediately in the rear of the axle IOisa' crossbeam 13, connected at its center with the axle 10 by means of the bolt 14,- which permits the beam 13 to tiltfreelyrelative' to the axle- Th'e beams 12 stand a sli htdistance above the axle 10 to permit as ight tilting movement of the beam 13 Two beams '15are Ialso rovided which extend'from a-point at the orward end of the machine above the axle--10 rearwardly' and inwardly toward the centeriof the machine. These-beams 15 are attached to the crossbeams.13, and shoulcross-piece 13 relative to the axle. At the rear end. ofthe machine-frame-is a 'crosspiece 17, to which the beams 12 'and'the beams 15 are fixed. Erected on 'this'crosspiece 17 is a stationary frame 18, havingat its .wardly and then upwardly and "mounted in I My'invention consists in certain details in the construction, arrangement, and combithe cross-piece 17 and frame 18, its upper end being angular at 24. YThis angular up-' per end extends through a lever 25, which is plane across the top of the rack 20,, Mount- .Gd OIl the'lever 25 is a spring actu'ated pawl 27, controlled by a handle 2'8fand normally in engagement with rack 20'. i; BY] t is ar- 'rangement the rear end of the machinemay be steered by the lever 25,,and this {lever may be set to any desiredposition, and held therein by the pawl 27 Furthermore} (the upright 23 may .freely slide up and down ders 16 are formed-intheforward ends to re-. c'eive theends of the axle 10, and in this way =to'permita limited tilting movement of the without eflecting the steering of the machine; in:

Lhave providedv for raising and lowering the rear endof the-machine, as follows: The numeral 29 indicates a stationarysupport in front of the upright 23] and having a. seg ,men tal rack 30. .Fulcnumed to this support '29 is'alever 31, provided with a spring-actue ated pawl 32 tofengag'e the rabk 30. Qn the rear end of the leveris a linli33, pivted to the upright 23. By this arrangement the 5 rear end of .the machine may be raised or --lowered relative-to the caster-wheels 22 by means of the lever 31, and the pawl 32 serves to lock'it in any'position in which it may be 'placed- As will be seen in the drawings, there are two scraper-blades with independent means for operating them, These devices on the opposite side of the machine-frame are exact counterparts, and hence but one will be herein described. Therefer'ence-numeral 34 indicates rockshaft 'havin an angular body portion and =rou'nded on s. Therear end is'supp'ortedin' a'j bearing-box 35, pivoted to the rear crosspiece 17, and the forward end is supported in a caring-box 36, pivoted to a sliding support- 'ing-bar37 This sliding supporting bar 37 extends'across; the machine-frame in the rear of the ,wheelsll and between the transverse guides 38 and the longitudinal cleats 39 on . thebar 12 and 15. At about the central portion of the rock-shaft is another sliding supportin'g-bar" 40, extended inwardly across the machine-frame and under the and 40 is'a beam 42, to'which the blade raising and lowering means, hereinafter 'decleats-41. Mounted between the bars 37 scribed,' are attached. I have provided means for "adjusting the parts 37 and for supporting them in their adjusted positions;

. as follows: Fixed to the beams 12 above the v tion in which itjis set.

raising and lowering the scraper-blade atsupporting-bar 37 is asegmental rack 43, and fulcrumed to the rack is a lever 44, carrying a spring-actuated pawl'45 to engage the rack43. The lower end of the lever is slotted at 46 to admit a pin 47, carried by the bar 37,. In this way a movement of the lever 44 will operate to slide the'bar 37 toward or from the center of the machine, and the pawl 45 will secure the lever in any posi- I have provided means for independently tached to" the rock-shaft 34, as follows: Fixed to rock-shaft 34- are a number of curved arms 48, and on their outer ends is the scraperblade'49. At the forward end of the scraper- .blade I haveprovided a'reinforcing cutting "6o 'vided a means for bodily ,raising and lower blade'50', which maybe diatached when worn and a new one substituted. I have proing each blade I comprising a bevel gearwheel 51, fixed to the'rock-shaft 34. On the bar 42' is a bearing 51, in which the shaft 52 is rotatablymounted, Fixedly mounted on the'irock shaft 34 is a hearing 53, ha :i collar 54 to receive the shaft A be gear-wheel 54 on the shaft .52 is in mesh with gear-wheel 51. On the u aper end of the shaft 52-isa hand-Wheel .6, by which the shaft 52 may be turned. In this way the rock-shaft 34 may beamoved to raise and lowerthe scraper-blade .49 relative to the road-surface or to throw the blade upw a r over the top of the machine, as shmvn in .r

4, and when in this position the blades we? not project beyond the sides .of the machine frame, and hence the machine may be dr. in through a gateway of ordinary width have provided for holding the shaft 52 1 various positions, as follows: Comic with the bearing 51 is an arm 57, to which flexible band-brake 58 is attached. band-brake passes around a small learnt wheel 59 on the shaft 52, and attached to n other end is a link 60, to which the foot-l 61 is pivoted. Theoperator may, by pi ring his foot upon said lever, actuate the band-brake to hold the shaft 52 against rotation.

means for tilting -the .scraper-bh-dp relativw to the vertical line and I have shown a do vice for this purpose 111 Fig. 5. The scraperblade is supported from the rock-shat t 34 by means o'r two arms 62, pivoted to" the braciz.

'ets.63 on the outer face of the blade. his tached to oneof the arms 62 1s a segmental rack 64, to whicha lever 65 1s fulcrurnod,

Til f;

In some instances it is desirab to providr This lever is provided with a spring-actlr- 1 'ated pawl 66, and its lower end :18 shdingly connectedto the slotted bracket 67-, fixed to the upper edge portionof the blade 49. By this arrangement the operator may grasp the suit the requirements by means of the levers 31. In steering the device under ordinary cireumstances the'casterswheel: is set to position in line with the long center of the ma c'hine- However, if it is desired to crowd tlu: machine toward one side of the road, so that it will out more deeply on one side than the other, the operator mayset the steering-wheel 2 so that it will direct the machine in the de sired manner.- .During the ordinary opera-- tion ofth'e machine when both blades are set to the posit on required foractive work the The i lever 65, and bymanipiilati'ng it heinay til front axle may have a slight'tilting move we face.

seacee g i I ment relative to the maclnne-frame so as to adapt itself to inequalities of the road-sur- Having thus described my invention, what I claim,'and desire to secure byLetters Patent of the United States therefor, is-

' 1. In a road-scraper, thecombination of a front axie,f supporting-wheels thereon, a

scraperbearing frame having pivotal connectlonwith the front axle, and means for limit-' mg the pivotal movement of the frame relative to the'axle, I

2. In a road-scr'aper,- the combination of a front axle, snp'porting wheels mounted thereon,: a frame ..,converging toward the rear, and

-.. 1fea'id frameipivotally mounted at its front end {ii-:91); the'axle to permit .a limited tilting move mentof the ends ;of the axle relative to the nan-t a rolling support for the rear end of theframe and two scraper-blades fixed to sides of the frame to engage the road-surface.

'3. "in aroad-grade'r, a frontaide, supportingwyheels. thereon, aframe comprising a for-- ward erosspiece, 'a bolt extendedthrongh the centerof the axle and. throughthe center of said crosapiece, arranged in a horizontal *pianey-to pivotally connect the cross piece andanle, converging side beams connected with the cross-piece, having'their front ends designed to engage the top of the axle and to limit the tilting movement of the cross-piece relative to the axle, two scraper-blades fixed to opposite sides of the machine and; a caster- .vvheel for {supporting the rear end ofthe frame.

'at', In a road-scraper, the combination ofa frame, supporting-wheels therefor, two rock shafts supported by the f'ramearid arranged on-iines converging at the rear of themachine, arms connected with'each rock-shaft, a scraper-blade carried by the said arms and means for swinging the scraper-blades from a position engaging the road-surface to apositienresting on top of the frame.

In a road-scraper, the combination of a frame, supporting-wheels therefor, two rockshafts supported by the frame and arranged e linesconverging at the rear of the machine, arms connected with each rock shaft, a scrapenblade carried by the said arms, means for swinging the sei'ap'er blades from a'position engaging the road-surface, to a position resting on top of-the frame, and means for adjnst' ngthe forward endsof SfilCllOCkshafts toward and from the longitudinal centhe machine.

. 6. Ina road-soraper, the combination of a frame, ,suppc'vrting wheels therefor, two rocks h supported by the frame and arranged on nnmconverging at the rear of themai chine, arms connectedwith each rock-shaft, a scraper-blade carried by eachset of arms means for-swinging the scraper-blades from a position engaging the Toiid-surface to a posi-' tion resting on top of the frame, means for adjusting the forward ends of said rock-shafts toward and from the longitudinal center of the machine, and means for holding each rock-shaft in various positions.

'7.- In-a road-scraper, thecombination of a machine-frame, a rock-shaft extended from the forward end of the machine rearwardly and inwardly, bearing-boxes for the ends of.

the shaft mounted to swing in a horizontal plane,.a cross piecesupporting the forward one of the said bearing-boxes and mounted slidingly on the frame, means for adjusting said cross-pieoe, a number of arms fixed to the rbckshaft, a sorapenblade carried by said arms, means carried by the frame for ftilti-n the rock-shaft to move it from position engaging the road-surface to a position on top of theframe. a

f8. In a road-scraper, theco'mbination of. a front axle, supporting-wheels thereon, a frame having.rearwardly-converging sides moiinted on the front axle, thexcaster-wheel at therear end. of the frame, means for adjusting therear end-of theframe, up and down relative to the caster, means for steering the caster and two scraper-blades on opposite sides of the framearranged on converging lines toward the rear end of the machine.

9. A road-scraper, comprising a frame, two

supporting-wheels at the front of the frame,

a castenwheel at the rear of the frame, said frame capable of sliding vertically relative to the cas'terwheehmean's for raising and lowering the framerelative to the caster-wheel,.

means for securing the frame in different positions, a steering-lever sliding-1y connected to the top of the casteravheel, a 'segmental'rack adjaeentto said lever, a spring-actuated pawl movedby the lever to engage the rack and two soraper-blades fixed to opposite sides of the machine-frame on lines. converging to- J RALPH One re,

F. C-mtisrn IIO

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