US1388809A - Scraper - Google Patents

Description

T.- EDGINTON.

SCRAPER.

APPLICATION FILED 11m. 2. 1920.

Patented Aug. 23, 1921.

INVENTOR. jfleodoreli'ddlniuza ATTORNEY UNITED, STATES,

PATENT OFFICE.

mnononnnnqmro t onscreen, CALIFORNIA.

" scimrna T 0 CZJZZ whom it may concern:

Be it known that I, THEODORE EDGINTON, a citizen of the United States, residing'at Cutler, in the county of Tulare, State of California, have invented certain new and useful Improvements in Scrapers; and I do declare the following to be a full, clear, and exact description-of the same, reference being had to the accompanying drawings, and to the characters of reference marked thereon, which form a part of this application,

This invention relates to improvementsin scrapers or land-levelers, and is of a type:

adapted'to be'drawn by a tractor or similar device. 7

The principal object of the invention is to produce a scraper in which'the loading and dumping of the device is controlled by the driver of the tractor from his seat thereon, thus making the two machines a one-man ,unit and so cutting down the cost of labor.

Another object is to arrange the scraping member that it may be set for different scraping depths, and at the will of the operator, may be instantly'released-so that it will automatically raise and dump the load carried thereby. 7

A third object is to so arrange the means for setting the level of the scraping memher, that while normally-retaining such level indefinitely, it has suflicient flexibility to raise and pass any hardobstruction such as a boulder, etc., without straining or damaging'the machine.

A further object of the invention is to produce a simple and inexpensive device, and yet one which will be exceedingly effective for the purposes for which it is de signed. I

These objects I accomplish bymeans of such structureand relative arrangement of parts as will fully appear by a perusal of the following specification and claims.

In the drawings si-milar characters of reference indicate corresponding parts in the several views. 7

Figure 1 is a perspective elevation of my improved scraper, looking toward the rear.

Fig. 2 is a detached perspective elevation of a winding drum for controlling the scraper lever, looking toward the front of a supposed tractor to which the drum is attached. i

Referring now more particularly to the Specification of Letters Patent. Patented Aug. 23, 1921. Applicationfiled J'anuary 2, 1920.1 s riainojsis ea characters of reference on the drawings, the

numeral 1 denotes a pair of longitudinal beams spaced transversely and'connected to getherat the forward ends by a beam 2.

Dependingfrom the beams 1 and securedthereto are curved runners" or shoes 3 extending lengthwise of saidbeams and adapted to ride on the ground, particularly atthe front end. These frame members are preferably made of angle or channel irons, suitably bolted or riveted together;

The rear end of the frame is supported by wheels esuitably mounted onan axle 5; o

'The beams 1 and runners 3 are in vertical alinement, the space there'between at the for- Ward end and for approximately half the length of the frame being inclosed by plates 6' 's'ecuredto the members 1 and 3'.

Extending the full width between the frames and positioned adjacent the rear ends.

of the plates 6 is a curved scraper plate 7, normally setting in a substantially vertical plane. bottom at each end of the samearebarsS each pair of which converges to a point adj a cent the forward ends of the beams 1, being pivotally secured thereto as at 9.

Centrally of the plate? and secured to the back side thereof is a strap 10 extending thereabove, to which is pivoted the lower end of links 11, to the other end of whichis pivoted the short arm 12 of a bell crank 13 pivoted in a support 1 1 secured to the rear- Secured to the'plate at the top and most of a pair of transverse beams 15 resting on the beamsl and'fixed thereto.

The long arm 12 of the bell crank projects, upwardly ina substantially vertical plane when in normal position, and is connected to be manipulated from a tractor attached to'the scraper and ahead ofthe same by means of a rope or cable 16 extending for ward to a winding drum 17 mounted in a horizontal transverse plane to a bracket orsupport 18. adapted to be attachedto the framework or body of the tractor at any suitable point adjacent the drivers seat thereon, wherever that may be. I This drum is controlled by a handle 19 having a releasable pawl and ratchet mechanism 20 arranged against undesired rearward move ment of the cable.

Positioned under the arm 12 of the bell crank is a spring 21, preferably of the elliptical or wagon type, which is fixed between and supported by the beams 15, and normally exerts an upward pressure on said arm to hold the scraper clear of the ground. A chain 22 attached to the forward end of the beams 1 serves as a drawbar for 'connection to the tractor.

In operation, when it is desired to set the scraper plate at a certain level to scrape a load of dirt, the cable. is wound on the drum, thus forcing the plate 7 below the level of the bottom of the runners 3 the desired distance against the pressure of the spring 21. By reason of the ratchet mechanism 20, this set position will be maintained without further attention on the part of the operator.

When it is desired to dump the scraper, the pawl is released, which action of course allows the cable to slaclren, and removing the tension from the spring 21, which will immediately resume its normal position and draw the scraper plate not only out of the ground but above the same to a height sufficient to permit the load to be left behind with a continued forward movement of the tractor pulling the scraper.

If it is desired to raise the scraper plate so that its level is the same as that of the runners 3, as would be desirable when transporting a scraped load before dumping the same, the pawl controlling the drum is released, while still maintaining tension on the handle 19, .so that the upward pressure of the spring 21 may cause the cable to be unwound just enough to bring the plate 7 to the ground level, when the pawl is again set.

The plates 6 permit a relatively greater load of dirt to be confined and moved from place to placethan is possible with the ordinary scoop type of scraping member.

The chains 22, being fastened to the runners 3 at a point considerably lower than their point of connection with the tractor, the latter carries the front end of the scraper, lifting the front end of the runners off the ground somewhat, and thus relieving the dragging pressure of the scraper on the ground.

From the foregoing description it will be readily seen that I have produced such a device as substantially fulfils the object of the invention as set forth herein.

While this specification sets forth in detail the present and preferred construction of the device, still in practice such deviations from such detail may be resorted to as do not form a departure from the spirit of the invention, as defined by the appended claims.

Having thus described my invention what tractor comprising a frame, a scraping plate transversely mounted therein, a lever means mounted to the frame and connected to the plate for moving the latter downwardly with a pull on the lever, the latter being actuated from the tractor, and a springconnected to the lever and to the frame and adapted to exert a constant upward pressure on the scraper plate.

3. A scraper comprising a frame, a scraping plate transversely mounted therein, a

bell crank pivoted to the frame, the shortarm thereof being connected to theplate and the long arm projecting upwardly and adapted to be pulled from the tractor to lower the plate, and a spring between such short arm and the frame and adapted to exert a constant upward pressure on the plate.

4. A scraper adapted to be drawn by a tractor comprising a frame, a'scrap'ing platepivot-ally and transversely. mounted therein, a'bell crank pivoted to the frame, the short arm thereof being connected to the plate and the long arm projecting upwardlyand adapted to be pulled from the tractor to lower the plate, a spring between such short arm and the frame and adapted to exert a constant upward pressure on theplate, a

cable attached to the long arm, a winding drum mounted to the tractor and-on which the cable winds, and a pawl and ratchet mechanism controlling the drum and arranged to normally'prevent the-cable from unwinding.

5. A scraper comprising a frame, a scraping plate transversely mounted therein, lever means for lowering the plate, and independent spring means for raising the plate when the pressure on the lever is removed.

In testimony whereof I afiix my signature in presence of two witnesses.

THEODORE EDGINTON.

Witnesses:

JAMES M. BURKE, SADIE F. Lnwrs-

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