US1265098A - Grading-machine. - Google Patents

Description

T. R. McKNlGHT.

GRADING MACHINE.

APPLICATION FILED JULY 20. l9l4.

Patented May 7, 1918.

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GRADING MACHINE.

APPLICATION man JULY 20. I914.

Patented May 7,1918.

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APPLICATION FILED JULY 20. I914.

Patented May 7,1918.

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UNITED STATES PATENT OFFICE.

THOMAS R. MOKNIGHT, OF AURORA, ILLINOIS, ASSIGNOR TO WESTERN WHEELED SCBAIER COMPANY, OF AURORA, ILLINOIS, A CORPORATION OF ILLINOIS.

GRADING-MACHINE.

Specification of Letters Patent.

' Patented May '7, 1918.

Application filed July 20, 1914. Serial No. 852,010.

To all whom it may concern:

Be it known that I, THOMAS ER. Mo-

KNIGHT, a citizen of the United States, re-

siding at Aurora, in the county of Kane and State of Illinois, have invented certain new and useful Improvements in Grading-Machines, of which the following is a specification, reference being had to the accompan ing drawings.

y invention relates to grading machines and it has for its object to improve the construction of the steering devices for the front wheels of the carriage and the devices for extending and adjusting the position of wheels, showlng the devices for adjusting the same;

Fig. 4 is a cross-section on line 4-4, of Fig. 3; and

Fig. 5 is a cross-section on line 5-5 of Fig. 3.

Referring to the drawings, in which I have illustrated my improvements as applied to a grading machine of the type shown and described in my pending application, Serial No. 33,026, filed June 9, 1915, in which the scraper-blade is arranged to be moved endwise upon its support 10-11 indicate the side-bars of the main frame of the carriage, which are preferably Z-shape in cross-section. Said side-bars are spaced a suitable distance apart and are connected by braces so as to make a strong, rigid frame. The end portions of said bars are curved downward, as shownin Fig. 1, so that the intermediate portion of the carriage frame is higher than the end portions thereof, as shown. wheels, which are mounted upon spindles carried by a front' axle 13, which is connected in any suitable way, as by a bolster 12 indicates the front.

14, with the lower member 15 of a fifth wheel. 16 indicates a draft-bar connected with the front axle, and 17 indicates" the tongue wh ch is connected to a strap, 18 wh chas pivoted at 19 to the draft-bar 16. 20 nd1cates a curved rack-bar having teeth on its concave side, which extends across the tongue 17, preferably at the under side thereof, and is connected at its ends with forwardly-extending bars 21--22 connected with the end portions of the axle 13, as shown in Fig. 2. 23 indicates a bracket secured to the under side of the tongue 17 and extending under the rack-bar 20 for supporting the same. The rack-bar 20 is adapted to swing to one side or the other to turn the front axle 13 and thus steer the machine. For the purpose of swingin said rack-bar, I provide a shaft 24 vertically mounted at the rear end portion of the tongue, as shown in Fig; 2, said shaft carrying a pinion 25 which meshes with the teeth of the rack-bar 20. 26 indicates a worm-wheel, also carried by the shaft 2-1 which meshes with a worm 27 journaled in suitable hearings in a bracket 28 mounted upon the upper side of the tongue, said bracket also being provided with a bearing for the upper part of the shaft 24. The worm 27 is rotated by a hand-wheel 30 conveniently disposed on the intermediate portion of the carriage frame, upon the rear end of a shaft 31 which is mounted in suitable bearings, as 3233, and is connected by a universal joint 34, shaft 35, and universal joint 36 with the worm 27. Thus by rotating the hand-wheel 30 the rack-bar 20 may be moved in either direction to steer the machine in the desired direction.

The rear axle of the machine is composed of two parallel members 37-38 which, in the construction illustrated, are square in cross-section and are fitted in a rectangular frame 39 which holds them in contact with each other. One end of said frame 39 is mounted on a vertical pivot 40 which is fitted in a box-like bracket 41 secured to one of the side-bars of the carriage, as 1 1, the

arrangement being such as to permit the opposite end of the frame 39 to swing forward and backward about the pivot 40 as an axis. The opposite end of said frame 39 extends into another box-like bracket 42 which is secured to the other side-bar 10 of the carria eand is rovided on its under surface 'wit a slight y. curved rack-bar 43, as best shown in Fig. 4. At this end of the frame 39 there is rovided a shaft 44 carrying a pinion 45 w ich meshes with the rackar 43, and a worm-wheel 46 which meshes with a. worm 47 carried at the lower end of a rod 48 fitted in .a bearing 49-prov1ded at one side of the frame 39, as shown in Fig. 4. The

lines at 51+52in Fig. 3, the rack 51 being arranged to mesh with a pinion 53 carried at the lower end of a rod 54, and the rack 52 meshing with a pinion 55 carried at the lower end of a rod 56. 57-58 indicate,

hand-wheels at the upper ends of the rods 54-56,-respectively as shown in F1 2. Thus by means of these hand-wheels elther member of the rear axle may be projected or retracted inde endently of the other and also independent y of the angular relation of the rear axle as a whole to the line of draft. 59-60 indicate the rear wheels, which are mounted, respectively, upon the axle members 37-38, as shown in Fig. 3. 61 indicates a platform provided for the operator at the rear end of. the machine, as Shown in- Fig. 1. As shown in Fig. 1, the

forward ends of the side-bars 10-11 are connected by a bracket 62 with the upper member 63 of the fifth wheel.

From the foregoingdescription it will be apparent that the front wheels are steered when in operation b means of the handwheel 30 and that t e rear axle may also be swun about the pivot 40, by operating the ban -wheel 50, to steer the rear portion of the machine in either direction. Thus the machine may be very accurately and quickly guided along any desired path. When desired, either of the rear wheels may b; extended by operating the hand-wheels 5 -58.

The construction shown and described for mounting and adjusting the scraper-blade is not herein claimed, as it forms the subjectmatter of my pending application hereinbefore referred to.

s It will be understood that my invention is not restricted to the specific details of the construction shown and described, except in so far as they are particularly claimed, as my invention includes generically the subject-matter of the broader claims.

That which I claim as my invention, and desire to secure by Letters atent, is,

1. In a grading machine, the combmation axis, the ivot of said axle being adjacent a 'to one si e of the frame, wheels mounted on the end portions of said axle, and means for swinging said axle horizontally about said pivot to simultaneously adjust said wheels angularly.

2. In a grading machine, the combination of a frame, a rear axle pivotally connected with said frame to swing about a vertical axis, the pivot of said axle being adjacent to one side of the frame, wheels mounted on the end portions of said axle, andrack and pinion mechanism for swinging said axle horizontally about said pivot to simultaneously adjust said wheels angularly.

3. In a grading machine, the combination of a frame, a rear axle pivotally connected with said frame adjacent to one side thereof and adapted to swing horizontally, a rack connected to the frame adjacent the opposite side thereof, a pinion carriedby the axle and meshing with said rack, a rod mounted on the axle and having a worm and Worm-Wheel for rotating said pinion, and a hand-wheel for rotating said rod.

4. In a grading machine, the combination of-a frame, a rear axle pivotally connected with said frame to swing about a vertical pivot, said axle being composed of extensible members, the pivot of said axle being adjacent to one side of the frame, and means for swinging said axle horizontally about said pivot.

5. In a grading machine, the combination of. a frame, a rear axle pivotally'connected with said frame to swing about a vertical axis, said axle being composed of extensible members, the pivot of said axle being adjacent to one side of the frame, and rack and inion mechanism for swinging said axle orizontally about said pivot.

6. In a grading machine, the combination of a frame, a rear axle pivotally connected with said frame adjacent to one side thereof and adapted to swing horizontally, said axle being composed of extensible members, a rack connected to the frame adjacent the opposite side thereof, a pinion carried by the axle and meshing with said rack, a rod mounted on the axle and havin a worm and worm-Wheel for rotating said pinion, and a hand-wheel for rotating said rod.

7. In a grading machine, the combination of a, frame, a rear axle pivotally connected with said frame to swing about a vertical axis, the pivot of said axle being adjacent to one side of the frame, wheels mounted on theend portions of said axle, means for 8. In a grading machine, the combination said pivot, front wheels supporting the forof a frame, a rear axle pivotally connected ward portion of said frame, and means for with said frame to swing about avertical steering said front wheels. pivot, said axlebeing composed of extensi- THOMAS R. McKNIGHT.

I ble members, the pivot of said axle being Witnesses:

adjacent to one side of the frame, means H. D. IIAMPER, for swinging said axle horizontally about H. O. KILLIAN.

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