US515744A - bunnell - Google Patents

Description

(No Modl.) 2 SheetsSheet 1.

M. G. BUNNELL. MACHINE FOR MAKING 0R REPAIRING ROADS.

No. 515,744, Patented Mar,.6, 1 94.

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(No Model.)

, M. G. BUNNELL. MAGHINB FOR MAKING (LB, REPAIRING ROADS.

Patented Mar. 6, 1894. kl

a W 7 j w 2/ W Q m m MW 1 UNITED STATES PATENT MORTON G. BUNNELL, OF CHICAGO, ILLINOIS, ASSIGNOR TO FREDERICK C. AUSTIN, OF SAME PLACE.

MACHINE FOR MAKING OR REPAIRING ROADS.

SPECIFICATION forming part of Letters Patent No. 515,744, dated March 6, 1894.

Application filed March 2,1891. Serial No. 383.392. (No model.)

To aZZ whom it may concern.-

Be it known that I, MORTON G. BUNNELL, acitizen of the United States, residing at Ohicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Machines for Making and Repairing Roads, of which the following is a specification.

The object of my invention is to provide to novel and improved means for effecting the horizontal swinging adjustment of the rear axle.

In the accompanying drawings; Figure 1,

illustrates, in top plan a road-working mar 5 chine embodying my invention, but divested of various matters which while understood to be present, are so common and well known in the art as not to require special illustration. Fig. 2, is a top plan on a large scale, of the rear portion of the machine,with the ends of the rear axle broken away. Fig. 3 is a cross section on line a@ in Fig. 2, the axle being shown in elevation. Fig. 4 is a side elevation of Fig. 2.

The body-frame A is, at its forward end, pivotally supported upon the front axle B; a preferred pivotal connection between the two being a fifth wheel 13', although any other known or suitable pivotal connection can be employed. 7

The scraper-blade O, is arranged to extend across the space between the front wheels 1 and rear wheels 2; and is diagonally adj ustable; that is to say, it is pivotally held be- 5 tween its ends, so that it can be swung horizontally about its longitudinal middle; and, hence, be set more or less oblique to the line of progress. The scraper-blade can be pushed by or drawn from the body-frame; but is preferably drawn by a horizontally-swinging and vertically-tilting draft-bar D, with which it is pivotally held at the forward end of the machine.

It is understood that, in practice, means 5 are provided for swinging and tilting the draft-bar and for adjusting the scraper-blade independently of the draft-bar, so as to vary the horizontal angle or diagonal adjustment of the bladerelatively to the line of road; and also that means are provided for effecting the raising and lowering of the blade. Va-

rious devices have been provided for efiecting such adjustments on the part of the draftbar and scraper-blade; hence, the same need not be herein illustrated, it being observed, however, that efficient devices for such purposes have been devised by me, and embodied in Letters Patent of the United States, Nos. 427,788 and 427,739.

The body-frame carries a couple of curved co racks F, arranged at opposite sides thereof; and the rear axle is provided with co -wheels or pinions G, which are fixed upon the axle and arranged to engage said racks. The racks are arranged respectively at opposite sides of, the rear axle; that is to say,one rack is arranged above and the other rack arranged below said axle. \Vhen, therefore the rear axle is rotated about its axis, one of its co wheels will travel toward the front while the other cog-wheel will travel toward the rear of the machine, and, thereby, swing the axle horizontally about a point midway of its ends. As a matter of course, a longitudinal movement on the part of the racks respectively in opposite directions would rotate and cause a swing on the part of the rear axle, but I prefer to arrange the racks rigid upon the bodyframe, and rotate the rear axle by suitable means. If however, it is desired to move the racks, they could be adjustably attached to the body-frame,'and if preferred any suitable mechanical device such as a screw orlever could be used for adjusting them.

In order to prevent the rear axle from tilt- 8 5 ing, independently of the body-frame; and to further guard against end thrust on the part of said axle; I provide, in conjunction with each rack, a curved hearing or guide H,,which is fixed upon the body-frame and formed on go a curve corresponding with the circle in which the end portions of the axle swing. I have provided each cog-wheel or pinion G with an annular ofiset formed at its inner end and arranged to receive one of said guides, as in Fig. 5 3. These racks F and guides H are conveniently formed along U-shaped bars N, which are'secured to the body-frame.

As a means for rotating the rear axle, I provide it with ratchets or notched wheels or [no disks K, fixed upon the end portion of the axle; and, in connection with each notched by operating either hand lever; although, as

a desirable mode of operation, the attendant will swing the hand levers; it being understood that, after swinging the hand levers in directionsto turn the axle, they can be brought back to their first position after the operator has disengaged the latches from the ratchets.

Various devices can be provided for looking the rear axle against rotation, the looking device herein shown being a collar or hub 6, fixed upon the axle, and provided with teeth or recesses 7; and a foot latch M, supported by the platform M, and arranged for engaging said hub.

. In application, Serial No. 383,140, filed by me on February 28, 1891, I have provided a horizontally swinging rotary rear axle, but'in place of the rack and pinion movement herein embodied, I have provided straps and:eccentries. While the two devices involve different constructions, itwill be seen that in each case I provide a'horizontally swinging rotary:

adjustable rear axle.

What I claim as my invention is- V V 1. The combination substantially as hereinbefore set forth in a road-working machine, of a wheel supported body-frame, a diagonally adjustable scraper-blade arranged between the front and rear wheels, and a horizontally swinging rotarily adjustable rear axle, for the purpose described.

2. The combination in a road-working machine provided with a diagonally adjustable scraper-blade arranged between the front and rear wheels, of a rotary and horizontally swinging rear axle adjustable independently of the body-frame, and a rack and pinion for adjusting the rear axle, substantially as set forth.

3. The combination in a road-working machine provided with a diagonally adjustable scraper-blade arranged between the front and rear wheels, of the rotary and horizontally swinging rear axle, a pair of racks carried by the body-frame and arranged respectively above and below the rear axle and cog-wh eels or pinions on the rear axle engaging the racks substantially as set forth.

4:. The combination in a road working machine provided with a diagonally adjustable scraper-blade arranged between the front and rear wheels, of the rotary and horizontally swinging rear axle, a pair of racks F, fixed upon the body-frame and arranged respectively above and below the rear axle, and cogwheels or pinions on the rear axle engaging the racks; substantially as set forth.

5. The combination in a road-working ma- 7 chine provided with a diagonally adjustable scraper blade arranged between the front and rear wheels, of the rotary and horizontally swinging rear axle, a pair of racks secured upon the body-frame and arranged'respectively. above and below the rear axle, and

' means suitable for rotating the rear'axle, and

the wheels carried by the rear axle for engaging with the racks substantially as and for the purpose set forth.

6. The combination in a road Working machine provided with a diagonally adjustable scraper-blade arranged between the front and rear wheels of the rotary and horizontally swinging rear axle, a pair of racks secured upon the body-frame and arranged respectively above and below the rear axle, cogwheels on the rear axle:engaging the racks, V V

and means for rotating the rear axle comprisinga vibratory hand lever supported upon but arranged to'swing' independently of the rear axle, ratchets or notched wheels fixed upon said axle, and latches carried by the hand levers and engaging said ratchets, substantially as set forth.

r 7. The combinationin a road working machine provided with a diagonally adjustable scraper-blade, of the rotary horizontally swinging rear axle, a rack F, on the bodyframe, a cog-wheel on the rearaxle engaging .before set forth in a machine for making and repairing roads, involving a scraper-blade arranged for diagonal Work, of a body-frame, U -bars N secured to the body-frame and each provided with a rack, the horizontally swinging rotary rear axle extending from one of the said U-shape bars to the other, and provided with cog wheels which engage with said racks a hand lever loose upon the rear axle and provided with a latch arranged to engage a gear fixed upon the rear axle, a disk or annular shoulder 6 fixed upon the rear axle and provided with latch receiving holes or notches, and a foot latch supported on the body-frame and arranged to engage in the holes or notches of said disk or shoulder.

MORTON G. BUN N ELL.

Witnesses:

HARRY COBB KENNEDY, CHAS. G. PAGE.

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