US680886A - Wheeled scraper. - Google Patents

Description

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3 Sheets-Sheet l.

(No Model.)

No. 630,886." Patented Aug. 2o, 49m.

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WHEELED SCRAPEB.

(Application led Sept. 24, 1900,) (N0 Model.) 3 Sheets-Sheat 2.

(No Model.)

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WHEELIED SGRPEH.

(Application led Sept. 2 190 3 Sheets-Sheet 3,

CHARLES RATH, OF LOS ANGELES, CALIFORNIA.

WHEELED SCEAPER.

SPECIFICATION forming part of Letters Patent No. 680,886, dated August 20, 1901. Application filed September 24,1900. Serial No. 30,976. (No model.)

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Be it known that I, CHARLES RATH, a citi; zen of the United States, residing at Los Angeles, in the county of Los Angeles and State of California, have invented certain new and useful Improvements in Wheeled Scrapers; and I do hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawings, forming a part of this specification, and to the letters of reference marked thereon.

This invention relates to improvements in wheeled scrapers and conveyers, the objects being to provide a construction and combination of mechanisms whereby the work of loading, raising, and conveying the loaded scoop shall be performed entirely by the team or draft power, While the control shall be entirely with the driver or attendant, thus rendering it practicable to make an excavating or scraping machine of very large size and capacity without imposing greater work on the driver or attendant than would be incident to the handling of a small-size scraper of usual construction.

In the accompanying drawings, Figure lis a side elevation of a scraper embodying my present improvements, the near wheel being removed to show the controlling mechanism and the scoop being shown down in loading position. Fig. 2 is a similar view with the scoop in raised position and with the bottom of the scoop in dumping position in dotted lines. Fig. 3 is a vertical section taken centrally from front to rear. Fig. et is a rear elevation. Fig. 5 is a top plan View. Fig. Gis a Vdiagrammatic View illustrating a modification.

Like letters of reference in the several figures indicate the same parts.

In general construction the scraper illustrated and embodying my present improvements is formed with a main frame consisting of two side portions united at front preferably by the framing to which the tongue is applied and at the rear by the tail-board of the scoop, such main frame being adapted to constitute the base to which the tilting scoopbody is pivoted and on which the swinging bearings for the axleof the ground-wheels are journaled, the latter mechanism constituting the direct raising and lowering mechanism for the main frame and scoop.

Referring to said drawings, the letter A indicates the side pieces of the main frame, such side pieces being connected at the front by the cross-framing B, pivoted at h4 to the side pieces, and beam B', to which parts the tongue C is attached in any usual manner. At the rear the side pieces A are rigidly connected by a rear frame, preferably in the form of a tail-board A', having forwardly-extending side portions A2, constituting, in effect, portions of the side frames A, because rigidly attached thereto, but in addition forminga convenient base for the attachment of other parts of the mechanism, as will hereinafter appear, and also serving as the sides of the rear portion of the scoop to prevent the escape of earth while loading or during transportation.

The scoop-body D is provided with two sides d, pivotally connected with the side frames A, preferably at a point d' slightly forward of the center of gravity, whereby it will when loaded tend to tilt down at the rear edge for dumping the load, such tilting, however, being normally prevented by catches D', pivoted on the sides and adapted to cooperate with projections D2 on the tilting section D. To release the catches D', they are connected by links d2 with crankarms d3 on a rock-shaft D3, and the latter is controlled by'a hand-lever D4, extending up into convenient reach of the driver, who occupies a position on the seat E at the rear andnear the left-hand side of the scraper. The catches may be held in normal position by a spring, such as e, and when desired the tilting of the body of the scoop may be inaugurated by a spring or springs c.

As before stated, the scraper is carried by ground-wheels, lettered F in the drawings and journaled on the opposite ends of an axle F', preferably a crank-axle, extending up over the scoop and in turn journaled in upwardly-extending portions A5 of the sides, whereby when said axle is turned to one position or the other the scoop will be correspondingly raised or lowered. In the preferred construction the axle is provided on each side with frames F2, rigid therewith and IOO having forwardly extending portions F3, journaled at f in the parts A5, and rearwardlyextending portions F4, brought together at the center and constituting a controllinghandle F5, which may be employed for turning the axle to raise or lower the scoop, but which normally serves simply as a means whereby the scoop may be held in its elevated position during transportation of the load. To accomplish the latter function, it is provided with a depending catch G, preferably having a series of teeth g, any one of which may engage a projection G' on the rear frame for holding the scoop at different elevations.

To relieve the driver from the labor of raising the loaded scoop, provision is made for performing this work by the draft of the team, and two mechanisms are preferably provided working in conjunction, but either of which will perform the work should the other fail or be ineffective, and both of which are controlled or thrown into action by the same control-lever.

To utilize the draft of the team first for advancing the lowered scoop to load it and then to raise the loaded scoop by a direct action, the team is hooked to' a doubletree H, mounted on a telescoping section h of the tongue, so as to move toward and from the body of the scraper. The yoke I is carried on the front end of the section 71 of the tongue, and under normal conditions or when the scoop is being loaded the doubletree and attached parts are held back in position by a heavy and wide hook K, engaging the cross frame or beam B'. The ends of the doubletree H are connected by flexible connections or chainsl with the mechanism for raising the scoop. This in the preferred construction consists of arms or segments L, mounted rigidly on the crank-axle or connected with or forming a part of the frames F2, but projecting at such an angle that when draft is applied to the flexible-connection Zthe tend- ,ency will be to rotate the axle backwardly or in a direction to raise the scoop.

Obviously instead of attaching the flexible connection to an arm rigid on the axle the saine results might be accomplished, as illustrated in Fig. 6, by passing the exible connection around a pulley M on the scoop, thence over a pulley M on the axle adjacent the ground-wheeLand attaching the end to the scoop.

With either arrangement when the hook K is tripped the draft of the team will draw the scoop up until the lock or catch engages. This motion may take place as the scraper continues to move forward unless there is unusual resistance to the motion of the groundwheels, in which case it will take place before the scraper advances.

When there is no resistance to the forward movement of the scraper, the elevating mechanismsofardescribedmightbeineffective,and to guard against such a contingency,as well as for the reasons before pointed out, a second or auxiliary elevating mechanism is provided and consists of a pair of toothed bars or racks N, pivoted at their lower ends to arms fn. on the side frames and adapted to be moved into mesh with similarly-toothed wheels or gears O, connected to rotate with the groundwheels. The racks N are connected by links N' with crank-arms p on a rock-shaft P, and said shaft is provided with a handle P', extending up into convenient reach of the driver. In addition to controlling the racks N the rock-shaft P is connected by a link Q with the crank r of a shaft R at the front of the scraper, which shaft R is provided with a central crank R',adapted when the shaft is turned by a forward movement of the handle to release the hook K, so as to permit the direct elevating mechanism to become effective.

The controlling-lever and shafts are returned to normal position by springs T T', and the weight of the tongue and fore frame is in a measure balanced by springs U, attached to the upwarly-extending portions of the side frames.

The control mechanism is preferably set to first release the hook, when if the direct elevating mechanism is not effective because of a downgrade or if for any other reason it is desirable to supplement it a further movement of the con trol-lever throws the racks into mesh with the gears and the scoop is raised.

The rear end of the scoop is preferably supported on a caster-wheel V, and the rear edge of the tilting or dumping section in addition to being strengthened by a strong cross-piece W is provided with a roller W', which will in a large measure protect the bottom of the section from wear and in addition it will direct the front edge of the scoop into the ground in loading.

To dump the loaded scoop, the hand-lever is pressed forward to release the catches, permitting the rear end of the tilting section to drop and the dirt to escape. When the scoop has been dumped,the release of the catch or lock and lowering ofthe scoop for loading brings the doubletree back to normal position and causes the tilting section to again engage its catches.

By constructing the scraper as described it is entirely practicable to make the same of very large size and capacity, and, in fact, the size is only limited by the number of draftanimals which may be hooked to the scraper and handled. The doubletree may be long and adapted for the direct attachment of four horses, as shown, or the horses may be hitched in double tandem, as best suits the particular work in hand.

I-Iaving thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

l. In a wheeled scraper, the combination with the main frame composed of the side pieces united at the front by a fore frame and at the rear by the rigid rear frame, the cranked axle pivotally connected with the side frames IOO IIO

whereby when the axle is turned the side frames will be raised or lowered and the ground-wheels journaled on the axle, of the scoop-body carried between the side frames, the draft-rigging movably mounted on the fore frame, arms moving with the axle, iiexible connections between the arms and draftrigging whereby the axle may be turned to raise the scoop and a lock for holding the scoop in raised position; substantially as described.

2. In a wheeled scraper, the combination with the main frame, the cranked axle pivotally connected therewith whereby when turned it will raise or lower the main frame, the scoop carried by the main frame and capable Vof an independent tilting motion to dump with catches for holding it in normal position and a lock for holding the axle in normal position with the scoop raised, of a draft-rigging movable toward and from the scoop and a iiexible connection extending back from said draft-rigging for rotating the axle to raise the scoop; substantially as described.

3. In a wheeled scraper, the combination with the main frame, and the scoop carried thereby, of the cranked axle pivotally connected with the main frame, the frame rigidly attached to said axle, the rearwardly-extending arms on said frame having the lock for holding the axle in adjusted position, the downwardly-extending arms also rigid with the axle, the independently-movable draftrigging and flexible connections, between the draft rigging and downwardly extending arms; substantially as described.

4. In a Wheeled scraper, the combination with the main frame consisting of the side and rear frames and fore framepivoted to the side frames, the scoop carried by the main frame and the cranked axle pivotally connected with the main frame, of the arms rigid with the axle for turning the same to elevate the scoop, the draft-rigging movably mounted on the fore frame and the flexible connections between the draft-rigging and arms on the axle; substantially as described.

5. In a wheeled scraper, the combinationk with the scoop, cranked axle, movable draftrigging connected with the axle for rotating the same to raise the scoop, the hook for holding the draft-rigging against independent movement and ground-wheels, of gears rotating in unison with the ground -wheels,

racks connected with the scoop and adapted to mesh with the gears, the control-lever, a

-trip for the draft-rigging hook and connections between said lever and hook-trip and rack-bars; substantially as described.

6. In a lwheeled scraper, the combination with the scoop, ground-wheels, draft-rigging and elevating mechanism :for the scoop operated by the draft-rigging, of an auxiliary elevating mechanism for the scoop comprising gears rotated in unison with the groundwheels, rack-bars carried by the `scoop and movable into and out of mesh with the gears, a manually-controlled rack-bar connected with said rack-bars for controlling the engagement and a lock for holding the scoop in its elevated position; substantially as described.

7. In a wheeled scraper, the combination with the side frames united at the rear and having the upward extensions at the front, the cranked axle pivotally supported by said upward extensions, the ground-wheels and the scoop supported between the side frames, of the rearwardly-extending arms rigidly connected with the axle, the lock operating through said arms to hold the axle in adjusted position, the gears on the ground-wheels the rack-bars on the side frames and means for moving said rack-bars into and out of mesh with the gear-wheels; substantially as described.

S. ln a wheeled scraper, the combination with the side frames, the tail-gate rigidly connecting the rear ends of said frames and the side pieces connected with said tail-gate and side trames, of the axle, the scoop-body pivotally supported between the side frames, a lock for holding the scoop-body against tilting and an elevating mechanism for the frames; substantially as described.

9. ln a wheeled scraper, the combination with the main frame, ground-Wheels and elevating mechanism for the main frame, of the scoop carried by the main irame and having a tilting body, a roller j ournaled beneath the rear edge of said body and catches for holding said body against tilting with means for releasing the catches; substantially as described.

CHARLES RATH.

Witnesses:

D. A. PRATT, C. M. PRATT.

IOO

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