US173901A - Improvement in harvesters - Google Patents

Description

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.W.`F.cocHRAN1E.-`

HARVESTER.

Patented Feb. 22,1876.

W. F. cool-IRAM.

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HARVESTER.

Patented Feb. I2.2, 1876.

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IMPROVEMENT IN HARVESTERS.

Specification forming partof Letters Patent No. 173,90I dated February 22, 1876; application filed March 27, 187'4.

To all whom 'it may concern:

Be it known that l, WILLIAM F. CocHRANE,

new and usef'ul Improvements in. Grain-Harvesters; and Vl do hereby declare the follow-4 ing to be a full, clear, and exact description of the saine, reference being 'had to the accompanyin g drawings, forming part of this specification, inl which- Figure l is a side elevation of the machine, with the cutting mechanism and inner drivewheel removed. Fig. 2 is atop-plan view,and Fig. 3 is a detached view, showing the construction of the lifting-lever and 'the method of connecting it to the foot-board, and Fig. 4 is a detached view of the lever-bracket.V

Similar letters of reference in the accompanying drawings denote the Vsame parts.

'My invention relates to` that class of twowheeled harvesting-machines, in which the main frame is formed with vertical segmental slots in the side pieces for the passage of the main axle, which actsas'a rock-shaft, and allows t-he frame to rise and fall independently thereof, through the limits ofthe segmentalv slots.

lt consists, first, in suspending the frame from the foot-board at the front and rear, in

of the foot-board to a point over the axial line of the cutter-bar. This methodV of suspension enables the main frame to be raised and lowered by the lifting-lever, to elevate or depress the cutters and regulate the pitch of the guardfingers at one andthe same operation. The invention also consists in the construction of the lifting-lever, and the method of connecting it to the foot-board. r

1n the drawings, A is the main axle carrying the drivin g-Wheels B, and C is the frame, the side pieces of which Iare formed with vertical segmental slots through which the axle passes. The frame is prevented from sliding laterally upon the axle `by `means of collars 'D fastened to the latter Abetween the side pieces of theframe, and these collars are cast with segmental pinions to mesh into curved racks cast in the segmental slots of the side pieces, for the purpose of raising and lowerin g the frame upon the axle when the lifting lever E is operated. F is the foot-board supporting the draftpole and drivers seat, and mounted upon the aXle so as to project forward over the main frame. G is a bracket secured to the foot-board near thev front inner corner, and formed with a guide-Hange, H, and lateral boss I, the latter being provided with two eccentric recesses, j', in its edge. K.

is the liftinglever fitted in a socket, L, which is cast with a grooved semicircnlar head, and a circular recess in one side. The lever-socket is pivoted to the bracket by a bolt, M, so that the boss shall enter the recess in the side of the socket, and serve as a bearing for the latter to turn upon, being guided by' the ida-nge H. N is a bolt, held within the lever-socket -by a spring, so as to pass into the circular recess, and enter the'eccentric openings in the erator. From the lifting-lever thus construct*- ed, the front end of the main frame is suspended by an adjustable chain, Q, as shown. When it is desired to raise or lower the front end of the frame, the latch l? of the lifting-lever is depressed to withdraw the locking-bolt from the eccentric recess in the boss, so that the lifting-lever may be turned thereon to the proper position. 'lhe spring-bolt is then 4released to again lock the lever tothe boss. R is a hook pivoted to the rear edge of the footboard, so as to extend backward over the main frame, where it is connected to a chain, S, attached to the rear edge of the frame, or to the shield of the pitman-shaft crank. The inner` end of the hook is pivoted in a socket of thc foot-board in such a manner as to prevent it from dropping down, While its outer end is free to rise above'the plane of the footboard. The hook and chain form the point of suspension for the rear end of the frame, and

upon which it turns when its'front end is raised or lowered bythe lifting-lever. T is the. drag-barjointed at its t'ront end to the end otA a girder, U, projecting laterally from the main frame .in front ot' the inner drivingwheel, and Vis the linger-bar bolted to the drag-bar shoe.

The front joint of' the drag-bar is so formed as to enable the bar to rock freely, and to rise and fall at its rear end, carrying the linger and cutter bars with it, as well as the rcel and reel-post.

Any of the ordinary joints now in use for this purpose may be employed, but 1. prefer the joint for which I have made application for Letter Patent.

The outer end of the finger-bar is supported by a grain-Wheel, and provided with a graindivider in tbe usual manner. The drag-baris further connected to the frame vby backbrace, W, pivoted at one end to the drag-bar shoe in ,rear of the cutter bar, and its opposite end to a projection, X, cast upon the crank-shield in line, or nearly so, with the pitman-shaft. The back brace also forms a radius bar to equalize the throw of the cutters through the guard-ngers during the rising and falling movements of the cutting mechanism. Y is the extension-bar bolted `firmly to the shoe of the drag-bar behind the cutterbar, and extending inward behind the main frame, where it is connected by a chain, Z, with a bracket, A', extending upward and to the rear of the mainframe at the inner corner thereof, as shown.

The'rontjoint oflthedrag-bar andthe bracket. chain, and extension-bar form the means by which the cutting mechanism is suspended from the main fifa-me, while the frame is suspended from the foot-board by the lifting-lever, the lifting-hook, and their respective' chains. The lifting-lever suspends the front end of the frame at the desired point, but the rear end, owing to the flexibility ofits 6011-' nection with the foot-board, is allowed to rise freely with the cutting mechanism for passing over obstructions in the path of either. When the rear end is thus thrown upward, the pivoted hook also rises to prevent it from coming in contact with the shield of the crank or the pitman-shaft, and interfere With the free movements of the pitman and cutters.

By suspending the frame and cutting mechanism, as above described, the operation of the lifting-lever will elevate or depress the cutters', and at the samev time regulate. the

suspended from the rear ot' the foot-board or,

tongue-bracket by a pivoted supporting arm and chain, substantially as. described, for the purpose specified.

2. The lifting-lever L, having a grooved semicircular head, a circular recess on one side, and a spring-locking bolt, N, in lcombination with thc bracket Gr, provided with a guide-flange, H, and lateral bars I, having eccentric recesses jj, substantially as described, and for the purpose set forth.

WM. F. COCHRANE. Witnesses:

E. A. ELLsWoRTH, N. K. ELLswoRrH.

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