US2306066A

US2306066A - Scraper

Info

Publication number: US2306066A
Application number: US292661A
Authority: US
Inventors: Bleu Charles Le
Original assignee: Individual
Current assignee: Individual
Priority date: 1939-08-30
Filing date: 1939-08-30
Publication date: 1942-12-22
Anticipated expiration: 1959-12-22

Description

,Dec. 2.2 1942. 6; LE BLEU SCRAPER Filed Aug. 50, 1939 3 Sheets-Sheet l C. LE BLEU 7 Dec. 22, 1942.

SCRAPER' Filed Aug. 50, 1939 3 Sheets-Sheet 2 INVENTOR Dec. 22, 1942. c. LE BLEU 2,306,066

SCRAPER Filed Aug. 30, 1959 3 Sheets-Sheet 3 FIG. 5

i l l I "unlimlll LNJ /8 INVEN TOR.

Patented Dec.- 22, 1942 UNITED STATESI." PATENT QFFICE 2,306,066 SCBAPEB Charles Le Bleu, Los Angeles, Calif. Application August 30, 1939, Serial No. 292,661

11 Claims.

This invention relates generally to material digging, scraping, leveling and transporting machines for use in leveling ground, building roads, excavating, grading, and transporting materials, and particularly to that class of machines, commonly termed scrapers, by means of which material may be scraped up and moved, and is an improvement upon the disclosures in. my copending application, Serial No. 254,851, filed February 6, 1939, one of the objects of my invention being to provide a scraper adapted to scrape up and carry very large quantities of material and which may be constructed in a wide variety of sizes and capacities, say for example, from ten to one hundred cubic yards.

Broadly speaking, the problems of modern scraper construction consists of providing a machine adapted to scrape up and carry and discharge large quantities of material with the least expenditude of power.

Therefore, one of the objects of my invention is the provision in a scraper including earth-' scraping and carrying means, of other means for positively moving material rearwardly into said earth-carrying means.

Another object of my invention is the provision in a scraper having earth-scraping and carrying means, of other means for positively moving the upper portion of material scraped up wardly of said carrier and confronting the same,

and means whereby said scoop may be caused to move in a path having horizontally and vertically extending portions. I

Another object of my invention is the provision .in a' machine of the character described, an earth carrier, a scoop normally disposed forwardly of said carrier and confronting the same, and means whereby said scoop may be selectively caused to travel a path rearwardly into said carrier or swing in a vertical plane in front of said carrier.

Another object of this invention is the provision in a machine of the character described, of an earth carrier, and a scoop normally disposed forwardly of said earth carrier and confronting the same, said scoop being arranged to travel a lower path rearwardly into said carrier and then an upper path forwardly to a position forwardly of said carrier.

Still another object of this invention is the provision of means for movably mounting the scoop so that forward or rearward movement of either end of the scoop will be transmitted to the opposite end of said scoop.

Still another object of this invention is the provision in a machine of the character described, of a'main carrier, a scoop normally dis-- posed forwardly of said carrier and mounted for movement rearwardly into said carrier and means for selectively permitting or preventing said rearward movement.

Another object of this invention is the provision of a novel carrier which may be dumped progressively so that the entire load need not be set into motion at one and the same time.

Still another object of this invention is the provision of novel means for supporting the carrier from'the ground so that it may be readily raised, lowered and transported.

Still another object of this invention. resides in the arrangement and construction of the side walls of the carrier and the arrangement of structure by means of which they are rigidly connected.

Still another object of my invention is the provision of novel means for connecting the forward end of a trailing vehicle to a front truck or selfpropelled draft device.

Still other objects, features and advantages of my invention should be apparent to those skilled 'in the art upon a detailed perusal of the attached drawings and the following specifications, wherein I exemplify and describe my invention, but it is to be understood that my invention, as exemplified and described, is susceptible to modifications in the combination, correlation and construction of parts members and features without departing from the spirit of the invention asdefined in the annexed claims.

These objects are accomplished by the embodiment of my invention illustrated in the accompanying drawings in which:

Figure 1 is a side elevation of my invention disposed in transporting position.

Figure 2 is a fragmentary top plan view of my invention in transporting position.

Figure 3 is a side elevation of my invention in section taken on broken line 3--3 of Figure 2,

all parts being in loading position.

Figure 4 is a side elevation of my invention in the scoop arms showing their section taken on broken line 4-4 of Figure 2, all parts being in the dumping position.

Figure is an enlarged top plan view of one of the side walls of the carrier in section taken on a horizontal line extending through the pivots by which the bottoms are supported on the side Referring now to the drawings, a carrier I0.

comprises rigidly connected parallel. side walls II, each of which, as shown, comprises spaced apart vertical plates I2 and I3 rigidly connected along their upper edges by a plate I4 and adjacent their lower edges by inclined braces I5. Spaced apart side walls II are rigidly connected at their rear ends bybeams I5 and I1, and back wall I1', and at their forward ends by blade beam l3 to which a blade I9 is detachably secured. Particular attention is directed to the manner in which beams I5 ,|1, and I8 are connected to side walls II. It is to be noted that beams I6, I1 and I 3 each extend through each of the vertical plates I2 to a rigid connection at each of their ends with an adjacent vertical plate I 3, and are also rigidly connected with vertical plates I2. Beam I1 is Provided as shown with a spreader bar 20. A plurality of bottoms 2|- and 22 are arranged between sidewalls II and are each provided with a hanger 23 at each of their ends, the hangers 23 attached to bottom 2| being pivotally connected to side walls II at 24, and the hangers 23 connected to bottom 22 being pivotally connected to side walls II at 25. It is, perhaps best explained at this point that vertical plates I2 are formed with a depression 22' therein, see Figure 5, into which the hangers 23 of bottom 22 extend, bottom 22 being of such width from hanger to hanger that bottom 2| may swing in between the hangers of bottom 22 during the dumping operation. However, although bottom 22 is wider than bottom 2| the latter may be the heavier, the reasons for which will be explained later herein. Hangers 23 of bottom 2| are each provided with a laterally extendin rojection 25 rigid therewith and extending through slots 21, formed in plates I2, into the space enclosed by vertical plates I2 and I3, each of said projections being tions. Hangers 23 of bottom 22 areeach provided with a laterally extending projection 29 rigid beam 36, the forward end or said arms extending forwardly into the spaces between plates I2 and I3 and are pivotally connected to plates I2 and I3 at 38. An upstanding arm 39 is rigid at its lower end with cross beam 38 and supports a horizontal pin 40 at its upper end and upon which are iournaled vertical sheaves 4 I.

' Thus it is seen that although body 43 is supported A front-frame 42, comprises a cross beam 43 having arm 44 rigid one with each' of its ends.

said arms extending thence rearwardly into the spaces between plates I2 and I3 to a pivotal connection with plates I2 and I3 at 45.' Frame 42 also includes a forwardly extending beam 48 rigid at its rear end with cross beam." and is adapted .at its forward end to be articulately supported from the ground. As shown, the front end of a horizontal axis only, indicated at 52, said axis 52 extending at right angles to axis 50. I

The vertical dimensionof the rear portion 53 of hitch 5| is slightly less than the vertical spacing oi projections 45' and 46', and is provided with a vertical opening in register with the openings in projections 45' and 46', and pin 54 pivo'tally connects the forward end of beam 45 to the hitch 5| for lateral swinging movement only.

from the ground across the axis by rolling supp rts 49 only, it is maintained in the plane of the axis of frame 42 by the novel means, above described, for connecting, one with th other, frame 42 and hitch 5|, and yet draft device 41 may move forwardly, make right and left turns,

and tilt transversely about axis 52 when the condition of the ground is such that axis 50 tilts with respect to rear axle 32.

Frame 42 also include a rigidly attached upstanding portion supporting -a pin 55 upon which is iournaled sheave means 51 and 58.

A thrust member 59 is pivotally mounted at its forward end on pin 55, and is provided toward its rear end with slots 50 through which pin 43 projects and thus member 53 is slidably mounted on pin 43. The'overhanging portion 5| of thrust member 55-is provided with a horizontal pin32 upon which is journaled sheave means 63.

therewith and extending through slots 30, formed I in plate I2, into the space enclosed by plates I2 and I3, each of said projections being provided with sheave means 3| disposed between plates I2 and I3 and ioumaled onsaid projections.

From the foregoing description it is seen that the carrier I0 comprises spaced apart connected side walls having a plurality of earth supporting bottoms swingably mounted therebetween.

An axle 32 is disposed transversely of and behind the carrier I Ii and is provided with rolling supports 33.

A rear frame 34 comprises spaced apart upstanding arm 35 supported at their lower ends on axle 32 and are rigid at their upper ends with a transverse beam 36. A pair of arms 31 disposed one directly behind each of the sidewalls IIare rigidly attached at their rear ends to cross A flexible member 64 is anchored at to the rear end of thrust member 53 and extends thence back and forth about sheave means 4| and 53 and thence forward and downwardly about sheave 51 to a windingdrum (not shown because of conventional design) It will be noted that arms 44 include upstanding portions 53, at their rear ends, up the upper end of which is pivotally connected at 51, a horizontally extending rigid link, 63, the rear end of which is pivotally connected at 53 to the lower portion 13 or arms 31. p

A scoop 1| is disposed forwardly of carrier III and confronting the same, scoop 1| comprising a bottom and back wall 12, and end walls 13, the upper portion of said walls being rigidly attached to a transverse beam. 14 the ends of which project beyond side walls II to a rigid connection with rearwardly extending arms 15. It will be noted that the spaced apart dimension of the end walls I3 of the scoop II is less than the spaced apart dimension of hangers 28 of bottom 22 so that the scoop II may move rearwardly between hangers 23.

Arms II are each provided with a plurality of uniformly spaced projections I8 which mesh with the projections of wheels 11, uniformly spaced about the circumference thereof, as shown, wheels I'I being rigid with a cross shaft I8 extending trahsversely of the rear end of carrier I8 and journaled thereon. The reason for mounting the rear ends of arms I5 as shown, or by some equivalent structure, is as follows: scoop II will often be unequally loaded so that when a force is applied thereto for moving the same rearwardly into carrier I8 the lighter loaded end of scoop II may tend to move in advance of the heavier loaded end, thus causing scoop II to swing laterally so that arms I5 may bind against adjacent structure. Again, when scoop II is in a position forwardly of carrier I8, other unbalanced forces acting upon scoop II could cause the same to swing laterally so that an end wall I3 would abut against the forward end of a side wall I I thus interfering with the normal operation of scoop II. I have therefore provided means which is supported and arranged with relation to arms I5 so that said means will operate in response to the movement of arms I5 whereby fore and aft movement of either of. said arms will cause a like movement of the other of said arms, and thus maintain scoop 'II aligned with said carrier in its normal path of travel when subjected to forces tending to move the same out of said path.

A so rigid with shaft I8 is a stop I9. A coil.

spring, encircles shaft I9 and is attached at one of its ends to the relatively stationary structure of carrier l8, and is attached at its other end to the stop I9 rigid with shaft I8 so that as shaft I8 rotates in a clockwise direction spring 88 will be wound up to empound a force therein tending to rotate shaft I8 in a counterclockwise direction.

A bracket 8| is rigidly attached to carrier I8 and is provided with a laterally projecting trunnion 82 upon which is journaled a latch bar 83, the free end of latch bar .83 being arranged 'and adapted to engage or disengage stop I9 carried by shaft I8 so as to selectively permit or prevent rotation of shaft 18.

A projection 84 is arranged relative to latch bar 83 and beneath the same and rigidly attached to an arm 31 of frame 34 so that as frame 34 swin s relative to carrier I8 about pivots 38 the projection 84 wil be moved to engage the underside of latch bar 83, or will be moved away from such engagement depending upon the direction of the swinging movement of frame 34, the reasons for which and the particular time at which projection 84 either engages or disengages latch bar 83 will be explained elsewhere.

It will be noted that the projections I8 of arms I5 are maintained in mesh with the projections of wheels 11 by means of a hanger 85 for each of arms I5, each of said hangers comprising a pair of plates 86 disposed one on each side of arm I5 and pivotally suported from shaft I8, the lower Side arms II are each provided intermediate their ends with rollers 82 disposed between the their rear ends and is pivotally connected thereto as shown at 98. A stop I9 is secured to each of the side walls II rearwardly of pivot 98 and upon which rails 91 rest so as to limit downward movement thereof about pivots 98.

A stop bar 91 is secured to each of the side walls II and arranged with relation to rollers 82, carried by arms I5, and serves to limit downward movement of arms I5, and consequently, scoop II.

A vertical shaft I 88 is journaled in bearings MI and I82 carried by front frame 42 and is provided with winding drums I83, I84 and I85 rigid therewith.

Each of the pivot pins 45, by which the forward frame 42 is pivotally connected with side walls II, is provided with a plurality of sheaves I86, journaled thereon. A pair of flexible members I 81 are disposed one within each of the side walls II and anchored as shown at I88 and pass thence rearwardly to and about sheaves 28, thence forwardly to sheaves I86, thence back and forth about sheaves '29 and I85 and thence forwardly within arms 44, to and about suitable direction change sheaves I89 and H8 as shown, one of said flexible members I 81 being wound about-and anchored to winding drum I83, the other of said flexible members I 81 being wound about and anchored to winding drum I 84, so that as winding drums I83 and I84 rotate about axis I88 both flexible members I8I will be wound up or both will be unwound from drums I83 and I 84 depending upon the direction of rotation.

The cross beam 14 is provided with spaced apart brackets I II supporting at their upper ends a removable pin 2 upon which are journaled sheaves II3. I

Thrust member 59 carries a horizontal pin II4 apgn which is journaled a plurality of sheaves Upstanding portion 55 of forward frame 42 is provided with a horizontal pin I I6 upon which a sheave II 1 is journaled.

thence to a winding drum (not shown because of conventional design).

It will be noted that each of sidewalls II are provided at their lower forward ends with a side cutter I I9 detachably mounted between vertical plates I2 and I3, and that the upper portion of side cutters II 9 and the rear lower portions of arms 44 conform. to circles,- the focal point of which is the pivotal connection of arms 44 with side walls II thus preventing the entrance of oncoming material into the side walls I I between vertical plates l2 and I3, position ofarms 44 relative to side walls II.

Before explaining my invention in operation in any angular it is perhaps best to point out that the path traveled by blade It, as it is lowered from its extreme raised position toits extreme .lower position or -as it is raised from its extreme lower position "to its extreme raised position, may be viewed 5 move upwardly first, followed by bottom 22, and

as being divided into three parts or positions. Viewing Figure 1, a line I20 will be found directly below the blade l9 and above the ground line |2|, and any position of blade I9 above line I20 22 is heavier than scoop II so that when a pulling 'force is applied to cable HI, scoop II will when bottom 22 has reached the limit of its morement, bottom 2| will then move. However, the

same results may be obtained by making bottoms 2| and 22 and scoop I| all the'same weight is termed the spreading position because the 10 and then providing a greater number of wind-- blade is then sufllciently above the ground line |2| to allow a conglomerate of'materials dis-' charged in front of blade Is to pass thereunder, and any position of blade I! below ground line,

ings of cable Ill! about sheaves 3| and I than is providedabout sheaves 28 and I. That is, the same results can be obtained by varying the value of the power application. But still again |2| is termed the scraping position of said blade the same results can be obtained by s p because the blade is in contact with the ground and will scrape up materials therefrom as the mounting sheave 28 closer to pivot 24.

As the machine moves across the surface of machine advances, and any position of blade I. the ground while disposed in the position of Figin that portion of the path of travel extending ure 3, scraper I 9 scrapes up material which moves from line |2l| to line |2| is termed the interthence rearwardly into carrier. I0 until a conmediate position of blade l9 because, -practi-' cally speaking, it is not sufficiently above the, ground to allow forthe passage thereunder of rocks, large pieces of dirt and wet sticky ma-.

siderable quantity is piled up' therein after which the oncoming materials move upwardly against the load already in the carrier and moves for- -ward1y into the scoop ll. When scoop ll .be-

terial, and is not in contact with the ground comes loaded, a pulling force may be applied to to the extent that suilicient quantities of materials can be scraped up therefrom. It is therefore seen that blade l9 passes throughan intermediate position as it moves from spreading to cable 8,. in response to which scoop II will swing upwardly, until rollers 22 clear stops 2!, thence rearwardly until rollers 9| contact plates H- of side walls after which scoop 'Il conscraping position, and from scraping to spreadinues to move rearwardly to the position indiing position, that is, from one effective position to another.

In operation the machine moves across the surface of the ground in response to a pulling cated at I22, and as scoop 1| moves to position I22, rollers 92 engage the under side of rail 21 I and swing the same upwardly about pivot 82, and as rollers. 92 move past the rear ends of rails force applied thereto by the self-propelled draft '81 said rails swing wn y back to r l device 41. Being in the position of Figure 1, a slackening of pressure on cable 64 will allow the pivots 4|! and 58 to move toward each other, the adjacent ends of

frames

34 and 42 together position, rollers 92 then being disposed slightly above the rear ends of said rails. It is perhaps as well to explain at this time that scoop 1| travels rearwardly into carrier l0 along a path with carrier Ill moving downwardly to the pomaterially above the bottom thereof, because'if sition of Figure 3, which is the scraping position.

It should be notedthat the upstanding portion 86, of the rear end offrame 42, the -downwardly extending portion III of frame 34 and the link 28, are so arranged and associated that move- 45 cation of power, and furthermore, when the lowerv ment of either of said frameswill impart a similar movement to other of said frames, and further, that the mechanical value of the same is such that the front and rear ends of carrier III will be affected to substantially the same de-" vided means for P h h pp r p rt n o gree so that it can be said that carrier Iii is raised and lowered substantially without tilting it.

Attention is also directed to the fact that as carrier I 0 moves downwardly and arms 31 swing an attempt were made to move the lower edse .of scoop rearwardly substantially in contact with bottoms 2| and 22 the entire load in, the carrier would move requiring an excessive applirear portion of the load reached back wall ll' y it would be impractical, if not impossible, to push it further'thus leaving the upper rear portion I of carrier III vacant, but as shown, I hav prothe load in the forward end of carrier ll rearwardly so that it will tumble or slide into the vacant space between the load and backwall .ll', and for this reason the carrier of my invention upwardly relative thereto, stop Bl contacts the y be 0! much ater capacity and still be I under side of latch bar 83 and moves the forward end of same from engagement with stop 19, carried by shaft 18, as blade I! moves through the intermediate position, thus freeing shaft I! loaded with the same power application required to load the carriers of much smaller capacity which" are used at the present time. Now simultaneously with the above, described action of for rotation when blade I! is disposed in the 0 scoop 1|, shaft 18 will have been rotated in a position of Figure 3.

Now, either before carrier |ll is lowered, at the same time it is lowered, or after it is lowered, a pulling force may be applied to cable and as scoop swings upwardly about gear I1 as an axis, rollers 92 carried by arms 15 move upwardly along the front faces of stops 95. It will be noted that stops 95 prevent rearward clockwise direction by reason of the association of toothed arms 15 with toothed wheel 11, and I a forcewill have been created in spring ll tending to rotate shaft It in a counterclockwise di- H8 to swing scoop II to the position of Figure 3, rection. Thus, it is seen that scoop H has been moved rearward into carrier It a substantial dis tance above the bottom of said carrier for the purpose of moving the upper part of the load therein to the rear end of said carrier, and durmovement of arms 15 and scoop ll until they 11 8 this Operation the Scraper c inues to scrape have moved upwardly a predetermined extent. Now it is perhaps best stated at this timethat although the purpose of cable 8 is to control tto 2| and 22 and also scoop II, the sequence V ms the materials accumulated in front of blade I:

in which these elements operate, upon manipuup material so that a considerable quantity will have accumulated in front of the blade. Therefore, the function of rail 81 is to guide scoop 1| along an upper path to a position forwardly of a,ao0,o

the'hub I21 of toothed wheel 11, hangers 8! simward end thereof, at which time stop 94 willcontact rollers 88 and scoop II will drop downwardly to the position indicated at I23, thelower edge of said scoop having traveled the path in-.

dicated by heavy broken lines C.

Scoop 1| being in the position indicated at I23, a pulling force may again-be applied to cable H8 to move scoop II rearwardly, against material accumulated in front of blade I9, and thence upwardly to repeat the operation of pushing the upper part of the load in carrier Ill rearwardly therein until the same is loaded, after which scoop II should be allowed to come to rest with the rear edge of same disposed adjacent scraper I9 so as to close the front end of carrier I8. Suitable manipulation of cable 6| is then resorted to for swinging the adjacent ends of

frames

34 and 42 upwardly thus raising carrier III to the position of Figure 1, stop 84 carried by frame 34 moving downwardly with respect to carrier I0 so as to permit the forward end of latch bar 83 to engage stop I9 as blade I9 passes through the intermediate position, thus latching shaft 18 against clockwise rotation when blade I9 is in spreading position v New being loaded -with -all parts disposed in position of Figure l, the machine is moved to the location where the materials are to be discharged and a pulling force may be applied to cable H8 for first swinging scoop H to the position indicated in Figure 4, the material spilling outwardly therefrom onto the ground in front of blade I9. It is well to remember at this point that shaft 18 is latched against clockwise rotation and scoop H cannot move rearwardly but can only move upwardly in response to a pulling force applied to cable H8. It is also apparent, from viewing Figure 4, why rail 97 is pivotally attached to side walls H. A continued application of a pulling force to cable H8 after scoop H has reached its uppermost limits of movement will result in unwinding cable H8 from drum I and thus causing shaft I00 together with drums I03, I04 and I05 torotate in a direction winding up cables I01, thus first swinging bottom 22 forwardly and upwardly about pivots 25 to the position shown in Figure 4, and when bottom 22 has reached its limit of movement, bottom 2| will swing forwardly and upwardly about pivots 24 to the position shown in Figure 4, both bottoms 2| and 22 dumping material therefrom at their rear ends, blade spreading said material as the machine advances. It will be noted that the load in the carrier is thus discharged without the necessity of setting the entire load into motion at one and the same time. A slackening of cable H8 will then result in returning the bottoms 2|, 22, and scoop H to the position of Figure 1 in the order named.

A modified form of my invention i exempli fied in Figures 6, '7 and 8 in which arms I24, similar to arms 'IShereinbefore described, are provided with a plurality of uniformly spaced projections I25 on the under side thereof, which projections mesh, as shown, with toothed wheel 11, the arms I24 being formed as a channel having the projections I25 formed between the legs I28 thereof which legs extend downwardly beyond the lower limits of projections I25 and ride ply being swung upwardly to; an inverted. position. Stop 19 is mounted-in reverse arrangement on shaft 18 and a' latch bar I28, adapted to receives. thrust load, has been substituted for latch bar 83, spring should then be wound about shaft 18 in a direction the reverse'of the winding shown in Figure 2.

From the foregoing description it will be seen that I, have exemplified and described such a device as substantially fulfills the object of my invention as setforth, and what I claim as new. and useful and desire tosecure byLetters Patentis: I

1. In a scraper, -a carrier including spaced apart sidewalls and a blade and a plurality of bottoms arranged one behind the other rearwardly of said blade to rceiveand support a load which is scraped up by said blade, each of said bottoms being adapted to discharge directly onto the ground, means for raising and lowering said carrier to selectively dispose the same in a loading or a carrying position, a scoop normally disposed forwardly of said carrier and confronting the same to be loaded in conjunction therewith, means mounting said scoop for both vertical swinging movement relative to said carrier and for sliding movement rearwardly into said carrier for pushing the load toward the rear end of said carrier in loading position thereof, means to prevent said rearward sliding movement of said scoop in carrying position of said carrier s as to adapt said scoop to swing vertically at the forward end of said carrier to discharge the load therefrom, and common operating means applied to said scoop and to said bottoms to control rearward movement of said scoop into said carrier and also to control the discharging of said scoop and said bottoms successively.

2. in a scraper, a carrier including spaced apart sidewalls and a blade and a bottom arranged to receive and support a load which is path materially above the bottom thereof for pushing the load toward the rear end of said carrier in loading position thereof, means to prevent said rearward sliding movement of said scoop in carrying position of said carrier so as to adapt said scoop to swing vertically at the forward end of said carrier to discharge the load therefrom, and common operating means applied to said scoop and to said carrier to control rearward movement of said scoop into said carrier and also to control the discharging of said scoop and said carrier successively. a

3. In a scraper, a carrier including spaced apart sidewalls and a blade and a bottom arranged to receive and support a load which is scraped up by said blade a portion of which moves rearwardly onto said bottom in response to pressure from oncoming materials and some of which piles up in front of said blade, said carrier being operable to discharge materials directly onto the ground, means for raising and lowering said carrier so as to selectively dispose the same in a loading or a carrying position, a scoop adapted to be disposed on the forward side of materials piled up in front of said blade and confronting said carrier to be loaded in con- Junction therewith, means mounting said scoop relative to said carrier sothat said scoop may have both vertical swinging movement relative to said carrier and substantially horizontal sliding movement rearwardly therein for pushing materials toward the rear end of said carrier in loading position thereof, means to prevent said rearward sliding movement of said scoop in carrying position of said carrier so as to adapt said scoop to swing vertically at the forward end of said carrier to discharge the load therefrom, and common operating means applied to said scoop and to said carrier to control rearward 'move-' ment of said scoop into said carrier and also. to

control the discharging of said scoop and said carrier successively.

4. In a scraper; a carrier including spaced apart sidewalls and a blade and a bottom arranged toreceive and support materials which arepicked up by said blade said carrier being adapted to discharge materials; means for disposing said carrier in a loading or a carrying position; a' scoop normally disposed forwardly of said arms to maintain said scoop in its normalalignment with said carrier; control means for causing said scoop to move rear-wardly into said carrier for pushing materials toward the rear end of said carrier in loading position thereof; means to prevent rearward movement of said scoope into said carrier in carrying position of said carrier so as to adapt said scoop to swing vertically at the forward end of said carrier for dicharging materials from said scoop; said control means being also adapted to control the discharging of said scoop, and said carrier successively. I v

5. In a scraper; a carrier including spaced apart sidewalls and a blade and a bottom arranged to receive and support a load which is picked up by said blade, said carrier being operable to discharge material directly onto the ground; means for raising and lowering said carrier so as to selectively dispose the same in a loading or a carrying position; a scoop normally disposed forwardly of said carrier and confronting the same to be loaded in conjunction therewith; means mounting said scoop for. both vertical and horizontal movement relative to said carrier, said means comprising arms secured to said scoop and having a multiplicity of uniformly spaced projections arranged longitudinally thereof, a rotatable cross shaft supported with relation to said arms, means supporting said arms from said .into said carrier for pushing the load toward the rear end thereof, means tosecure saidcross shaft against rotation so as to "adapt said scoop to swing vertically at the'forward end of said carrier for discharging the load in said scoop; and common operating means applied to said scoop and to said carrier to control rearward movement of said scoop into said carrier and also to control the discharging of said scoop and said carrier successively.

6.'In a scraper, a carrier including spaced apart side walls and a blade and a bottom arranged to receive and support a load which is scraped up by said blade; a scoop normally disposed forwardly of said carrier and confronting the same; arms secured to said scoop and extending longitudinally with said carrier, said arms having a plurality of uniformly spaced projections arranged longitudinally thereof; a rotatable cross shaft supported with relation to said arms; means slidably confining said arms with relation to said cross shaft and said carrier; and wheels rigid with said cross shaft and having a plurality of uniformly spaced projections arranged about the circumference thereof and in mesh with said projections formed on said arms for maintaining said scoop in its normal alignment with said carrier; stops supported with relation to said arms; rollers carried by said arms for cooperating with said stops in cetain positions of said arms; means for moving said scoop from a lower forward position toward the rear end of said carrier until said rollers engage said stops, thence upwardly until said rollers clear said stops, and thence rearwardly into said carrier along a lower path of travel materially above the bottom thereof to push the upper portion of the load toward the rear end of said carrier; rails having supporting association with said arms in certain positions of said scoop; and means for moving said scoop forwardly along an upper path defined by said rails to a position forwardly of said carrier.

7. In a scraper, a carrier including spaced apart side walls and a blade and a bottom arranged to receive and support materials which are scraped up by said blade, a portion of which moves rearwardly onto said bottom in response to pressure from oncoming materials and some of which piles up in front of said blade said carrier being also adapted to discharge materials;

cross shaft for both swinging and sliding movement relative thereto, wheels rigid with said cross shaft and having a plurality of uniformly spaced projections arranged about the circumference thereof and in mesh with said projections formed and means slidably confining the same with relation to said carrier and said arms having a plurality of uniformly spaced projections formed .thereon; control means for causing said scoop to move from its forward position rearwardly into said carrier along a lower path of travel materially above the'bottom thereof for pushing the upper portion of said materials toward the rear end of said carrier; rails having supporting as-' sociation with said arms in certain positions of said arms; a rotable cross shaft supported with relation to said arms and wheels rigid with said cross shaft and having a plurality of uniformly spaced projections arranged about the circumference thereof and in mesh with said projections formed on said arms to maintain said scoop in its normal alignment with said carrier; other means for moving said scoop forwardly along an upper path of travel defined by said rails; means to prevent rearward movement of said scoop into said carrier in spreading position of said carrier so as to adapt said scoop to swing vertically at the forward end of said carrier for discharging the load in said scoop forwardly of said blade; said control means being also adapted to control the discharging of said scoops and said carrier in predetermined order.

8. In a scraper, a carrier including spaced apart side walls and a blade and a bottom arranged to receive and support materials which are scraped up by said blade, a portion of which moves rearwardly onto said bottom in response to pressure from oncoming materials and some of which piles up in front of said blade; a scoop adapted to be disposed on the forward side of said materials piled up in front of said blade and confronting the same; means slidably mounting said scoop for movement longitudinally of said carrier, said means comprising arms secured to said scoop and means slidably confining said arms with relation to said carrier, said arms having a plurality of uniformly spaced projections formed thereon; stops carried by said side walls; rollers carried by said arms for cooperating with said stops in certain positions of said arms; means for causing said scoop to move along the surface of the ground toward said blade until said rollers engage said stops, thence upwardly above said blade until said rollers clear said stops and thence rearwardly into said carrier along a lower path of travel materially above the bottom of said carrier for pushing the upper portion of said materials toward the rear end of said carrier; a ro- I tatable cross shaft supported withrelation to said arms; wheels rigid with said cross shaft and having a plurality of uniformly spaced projections arranged about the circumference thereof and in mesh with said projections formed on said arms so as tomaintain said scoop in its normal alignment with said carrier; rails carried by said side walls and having supporting association with said rollers in certain positions of said arms; and means for rotating said cross shaft to cause said scoop to move forwardly along an upper path defined by said rails to a position forwardly of said materials piled up in front of said blade.

9. In a scraper, a carrier including spaced apart sidewalls and a. blade and a bottom arranged to receive and support materials which are scraped up by said blade, said carrier being adapted to discharge materials, a scoop normally disposed at the forward end of said carrier to be loaded in conjunction therewith, operable means mounting said scoop with relation to said carrier so that said scoop may have both vertical swinging movement relative to said carrier and also sliding movement rearwardly therein for pushing materials toward the rear end of said carrier, means to selectively prevent said rearward sliding movement of said scoop so as to adapt the same to swing vertically at the forward end of said carrier to discharge the load therefrom directly onto the ground in front of said carrier, and common opeating means applied to said scoop and to said carrier to control rearward movement of said scoop into said carrier and also to control the discharging of said scoop and said carrier successively.

10. In a scraper, a carrier including spaced apart side walls and a blade and a bottom arranged to receive and support a load which is picked up by said blade; means for moving said carrier into scraping and spreading positions,

there being an intermediate position between said scraping and spreading positions; a scoop normally disposed forwardly of said carrier and confronting the same; means mounting said scoop for movement from its forward position rearwardly into said carrier, said means comprising arms secured to said scoop and means slidably confining said arms with relation to said carrier; a rotatable cross shaft supported with relation to said arms and associated therewith so that said shaft is rotated as said arms slide and said scoop moves rearwardly into said carrier for pushing the load toward the rear end thereof; and operable means acting automatically as said blade moves through said intermediate position to release said shaft for rotation or to secure said shaft against rotation, depending upon the direction of movement of said blade.

11. In a scraper, a carrier including spaced apart side walls and a blade and a bottom arranged to receive and support a load which is picked up by said blade; means for moving said carrier into scraping and spreading positions,

there being an intermediate position between said scraping and spreading positions; a scoop normally disposed forwardly of said carrier and confronting the same; means mounting said scoop forvmovement from its normal position rearwardly into said carrier, said means comprising arms secured to said scoop and means slidably confining said arms with relation to said carrier, said arms having a multiplicity of uniformly spaced projections arranged longitudinally thereof; a rotatable cross shaft supported with relation to said arms; wheels rigid with said cross shaft and having a'multiplicity of projections arranged about the circumference thereof and in mesh with said projection carried by said arms; a stop carried by said cross shaft; and operable means mounted with relation to said stop, said operable means acting automatically as said blade moves through said intermediate position to engage said stop to prevent rotation of said shaft ,or to release said stop, depending upon' the direction of movement of said blade.

CHARLES LE BLIU.