US795655A - Wheeled scraper. - Google Patents

Description

No. r195,555. PATBNTED JULY 25', 1905. c. H. sAwYBR.

WHEELBD SGRAPBR.

nrmouron rmm APB.. 21.1905.

4 SHEETS-SHEET 1.

No. 795,655. PATENTED JULY 25, 1905.

G. H. SAWYER. Y

WHBELED SCRAlER.-

APPLICATION FILED APR. 21.1905.

4 SHEETS-SHEET 2.

No. '795,6'55. PATENTED JULY 25, 1905. C. H. SAWYER. WHEBLED SGRAPER.

APPLICATION FILED APR. 21. 1905.

,www n mmm m. moral mmwmnm w1 mmm D r No. 795,655. PATENTBD JULY z5, 1905. c. H. sAwYER. WHEBLBD scRAPBR.

APPLICATION FILED APB. 21, 1905.

4 SHEETS-SHEET 4.

UNITED STATES PATENT OFFICE.

CHARLES H. SAWYER, OF MINNEAPOLIS, MINNESOTA, ASSIGNOR OF-ONE- HALF TO M. E. SAWYER, OF MINNEAPOLIS, MINNESOTA.

WHEELED SCRAPER.

Specification of Letters Patent.

Patented July 25, 1905.

Application filed April 21, 1905. Serial No. 256,741.

To all whom it may concern.

vention, such as will enable others skilled in.

the art to which it appertains to make and use the same.

My invention relates to wheeled Scrapers of the class disclosed and claimed in my prior patent, No. 773,991, issued to me of dateNoveiber 1, 1904, and has for its object to improve the construction and operation of Scrapers of this general character.

My invention consists of the novel devices and combinations of devices hereinafter described, and defined in the claims.

In the accompanying drawings, which illustrate my invention, like characters indicate like parts throughout the severaly views. A

. Figure 1 is a plan View of the improved scraper, some parts being broken away. Fig. 2 is a side elevation of the improved scraper, showing the same as loaded; and Figs. 3 and 4 are vertical sections taken approximately on the line m3 w* of Fig. 1, the former showing the scraper-bowl in the dumping position and the latter showing said bowl in the filling position.

The numeral 1 indicates a heavy crank-axle, upon the trunnion-like crank ends of which truckwheels 2 are loosely mounted in the usual or any suitable way.

The numeral 3 indicates thescraper-bowl, which at its sides is rigidly secured to the downward ends of the pair of laterally-spaced compound hanger-brackets 4. These hangerbrackets, as shown, are formed by flat bars that are bent approximately at a right angle and are provided with, near their upturned angles, metallic straps 5, that form elongated seats 5, through which the transverse body portion of the crank-axle 1 is passed. The downward movement of the crank-axle in the seats 5L is limited by stops, as shown, in the form of nutted bolts 6, which are adjustably passed through perforations 7 in the straps 5 and overlying body portion of the brackets 4.

The pole 8 is provided on its upper surface with a rigidly-secured metallic strap 9, that projects laterally beyond the sides of the pole, and at the end of the pole projects and is bent upon itself to form a looped arm 9, the

loop of which pivotally embraces the central body ofthe crank-axle 1.

'lhe numeral 10 indicates a heavy drag-bail,

prongs of which project rearward and are pivotally attached at 11 to the upper forward portions of the sides of the bowl 3. The forwardly intermediate portion of the bail 10 is bent at 10 to form a loop which slides upon the laterallyprojecting edges of the polestrap- 9. This loop 10 when the parts are in the position shown in Fig. 2 is adapted to be engaged'and held by a latch-dog 12, pivoted at its forward end to the pole-strap 9. A stop 13 on the pole-strap limits the forward movement of the said looped end 10a of the drag-bail 10. A releasing-lever 14 is pivoted to the free end ofthe dog 12, and the triprod 15 is attached at its forward end to thev forward end of the releasing-lever 14. The4 rear portion of the trip-rod 15 works through a guide 16 on the looped end 9 of the polestrap and terminates in a handpiece 15". By pulling rearward on the trip-rod 15 the short end of the lever 14 is thrown against the pole-strap 9, thereby raising the free end of the dog 12, releasing the bail 10.

Rigidly secured to each arm of the crank-I axle 1 is a lifting-lever 17, formed, as shown, by heavy metallic strap bent in theform of an elongated loop, forming at its lower free end a guide-head 17, through which works aA sliding ground-engaging plate 18. The upper end of the plate 18 is pivotally attached to one arm ot' a bell-crank 19, that is pivotally mounted on one side strap of the corresponding lifting-lever 17. The other arms of the said bell-cranks are pivotally connected to the forward ends of links 20, which links at their rear ends are pivotally attached to arms formed at the ends of an operating crankshaft 21, the body of which is pivotally mounted in the bearings 22 on the rear end of the bowl 3. At vits intermediate portiony the body oi' the crank-shaft 22 is provided with a rigidly-secured operating-lever 23. Tov the operating-lever 23 is pivoted a long grav-l ity-operated lock-dog 24, the free end of which is adapted to engage under .a stop-block 25, rigidly secured on the upper central portion ofv the rear plate of the bowl 3.

The numeral 26 indicates handpieces rigidly secured to the sides of the rear portion of the bowl 3.

The numeral 27 indicates stop-lugs on the` sides of the scraper-bowl and with which the lifting-arms 17 engage in the certain position to be hereinafter noted.

The numeral 28 indicates an adjustable stop, as shown, in the form of a pin and which is adapted to be inserted into any one of the sev-r eral perforations 29, formed in the pole-strap 9, near the rear end ofthe pole.

Operation: When the scraper is carrying the loaded bowl along the road, the portions will stand substantially as shown in Fig. 2, on account of the drag-bail 10 being locked to the pole by the dog 12 and the level 23 of the operating crank-shaft 21 being turned downward and rearward. At this time the lower portions of the lifting-levers 17 engage the. stops 27 on the sides of the scraper-bowl, and the lock-dog 24 holds the lever 23, the arms of the crank-shaft, and the links 20 drawn rearward. In some instances the stops 27 would be located on the scraper-bowl in the positions indicated by dotted lines, (marked 272) thereby permitting the lower ends'of the lifting-arms 17 to move farther backward than shown in Fig. 2. This would permit the trunnions of the crank-axle 1 to. move rearward of the vertical dead-center and permit the links 2O to drop slightly under the action of gravity, thereby through the bell-cranks 19 causing the ground-plates 18 to move upward into the lower portions of the said lifting-levers. When it is desirable to throw the bowl into a du m ping position, the drag-bail 10 must first be released by drawing rearward on the trip-rod 15. When the drag-bail is thus released, the scraper-bowl may be turned upward into a dumping position, as indicated in Fig. 3. The position of the stop pin 28, as is evident, will limit the extreme forward movement of the upper portion ofthe scraper bowl, so that it may be stopped in any desired approximation to a vertical position, thereby adapting the lower edge of the bowl to be used as a scraper for leveling olf the earth dumped from the bowl. When this leveling action is not desired, the stop-pin 28 may be entirely removed, so as to permit the bail to slide farther backward on the pole, and hence the upper portion of the bowl to be thrown farther forward. Before the bowl can be thrown into contact with the ground, or into filling position, it must first be thrown backward approximately into the position indicated in Fig. 2, thereby causing the forward looped portion of the drag-bail 10 to again be cocked and held by the lock-dog 12. This being done, the lock-dog 24 should be raised, and the lever 23 should then be thrown upward and forward, as indicated by full lines in Fig. 4. This forward movement of the lever 23 acting through the links 2() and the bell-cranks 19 first forces the groundplates 18 into their extreme upper positions with respect to the lifting-armpl7, and then positively forces the lower ends of said lifting-arms and the crank portions of the axle 1 and the wheels forward, with respect to the scraper-bowl, as also indicated by full lines in Fig. 4.

Under the above movements of the parts the body of the crank-axle 1 drops in the seats 5 of the hanger-brackets 4 until it strikes the stop-bolt 6, thus determining the angle at which the bottom of the bowl will enter the ground. Hence, as is evident, by adjustments of the stop-bolt 6 in the different perforations 7 of said brackets 4'the bowl may be arranged tol enter the ground at different angles at different times, as may be desirable, according to the condition of the soil.

i/Vhen the bowl has been filled under the forward movement of the machine and it is desired to raise the bowl, the lever 23 is drawn rearward, approximately as is shown by dotted lines in Fig. 4, thereby through the crankshaft 21 and links 2O and bell-cranks 19 simultaneously forcing downward into contact. with the ground the lower portions of the ground-plates 18, as is also shown by dotted lines in Fig. 4. This being done, it is evident that Linder. the forward movement of the machine the plates 18 will enter the ground and will cause the lifting-arms 17 and the crank-axle 1 to move pivotally approximately into the positions indicated in Fig. 2. As is evident, under the above-noted movement of the crank-axle the filled scraperbowl is positively raised into an elevated position. The lifting-arms 17 and ground-plates 18 serve to positively cause the crank-axle to make that pivotal movement which is necessary to lift the scraper-bowl, and this movement is accomplished without relying on the traction of the wheels to accomplish the lifting' of the bowl. Vhen the operating-lever 23 has been moved to the position shown in Fig. 2, the lock-dog 24 again falls back of the stop-lug 25 and locks the several parts substantially in the position shown in Fig. 2.

The mechanism above described, while extremely simple, strong, and durable, is capable of being very easily operated and is generally efficient for the purposes had in view. From what has been said it will be understood that the device described is capable of modification within the scope of my invention as herewith set forth and claimed.

What I claim, and desire to secure by Letters Patent of the United States, is as follows:

1. In a wheeled scraper, the combination with a crank-axle and wheels mounted on the trunnions thereof, of a scraper-bowl suspended from said crank-axle, and a lifting-arm mounted to oscillate with said crank-axle, and provided with an extensible ground-engaging section at its lower end, substantially as described.

2. ln a wheeled scraper, the combination with a crank-axle and wheels mounted on the trunnions thereof, of a scraper-bowl, suspendmultaneously projecting said ground-plates,

substantially as described.

4. In a wheeled scraper, the combination with a crank-axle and wheels mounted on the trunnions thereof, of a scraper-bowl suspended from the body portion of said crank-axle, a lifting-arm rigidly secured to said crank-axle, and having an extensible ground-plate at its lowerend, a pole pivotally connected to the body portion of said axle, a drag-bail attached 1' to said bowl and working on said pole, a lock for securing the forward portion of said dragbail to said pole, a clip releasing said lock, and an operating-lever connected to said lifting-lever and with a ground-plate thereof, for imparting the required movements thereto, substantially as described.

5. In a wheeled scraper, the combination of a crank-axle and wheels journaled on the trunnions thereof, of a pole pivotally connected at its rear end to the body portion of the said axle, a scraper-bowl pivotally suspended from the body of said axle, a pair of liftingarms rigidly secured to said crank-axle, one on each side of said bowl and provided with extensible ground engaging plates, bellcranks pivotally connected to said arms and to the upper ends of said ground-plates, an operating' crank-shaft, mounted on the rear portion of said bowl, and provided with an operating-lever, lin-ks connecting the arms of said crank-shaft with the projecting arms of said bell-cranks', a drag connection applied to the forward portion of said bowl and working on said pole, and a lock for securing said drag-bar to said pole, substantially as described.

6. In a wheeled scraper, the combination with a crank-axle and wheels journaled on the trunnions thereof, of a pole pivoted at its rear end, to the body portion of said axle, hangerbraclzets secured to said bowl and having elongated seats engaging the body portion of said axle, a drag-bail attached to the forward side portions of said bowl and working on said pole, a lock for securing said drag-bail to said pole, a trip for said lock extending to the rear of said pole, lifting-arms rigidly secured to said crank-axle on the opposite sides of said bowl and provided with extensible groundplates, bell-cranks pivotally connected to said lifting-arms and to the ground-plates thereof, a lever-equipped operating crank-shaft, mounted on the rear portion of said bowl, links connecting the arms of said crank-shaft to the projecting arms of said bell-cranks, and a lock-dog connected to said operating crankshaft and cooperating with the stop on the said bowl, to temporarily lock said crank-shaft against oscillation, substantially as described.

7. In a wheeled scraper, the combination with a crank-axle and wheels journaled on the trunnions thereof, of a pole pivotally connected at its rear end to the body portion of said crank-axle,a scraper-bowl pivotally suspended from the body portion of said crank-axle, a drag-bail attached to the forward portion of said bowl and working on said pole, a lock for securing said bail to said pole in a forward position, and means for variably limiting the rearward sliding movement of said bail on said pole, substantially as and for the purposes set forth.

8. In a wheeled scraper, the combination with a crank-axle and wheels journaled on the trunnions thereof, of a pole pivotally connected at its'rear end to the body portion of said crank-axle, a scraper-bowl pivotally suspended from the body portion of said axle, a dragbail attached to the forward portion of said bowl and mounted to slide on said pole, a lock for securing said bail to said pole in a forward position, and an adjustable stop on the rear portion of said pole, limiting the rearward sliding movement of said bail, substantially as described.

9. In a wheeled scraper, the combination with a crank-axle, and wheels mounted on the trunnions thereof, of av pole pivotally attached at its rear end to the body portion of said axle, ascraper-bowl connected to said pole by a drag connection, suspending-brackets secured to the sides of said bowl, and provided with elongated seats engaging the body portion of said crank-axle, and adjustable stops in said elongated seats, for limiting the sliding movement of said crank-axle in said seats, and thereby determining the angle at which the bowl will enter the ground, substantially as described.

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

cHARLEs H. sAvvYnR.

Witnesses:

ROBERT C. MABEY, H. D. KILGORE.

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