US139787A - Improvement in harvesters - Google Patents

Description

W. HARRISON.

Harvesters.

vmovement of' the movable blades.

ward above the top of the wheel.

UNITED STATES WILLIAM HARRISON, or LINNEUs, MIssoURI, AssIenoR 0E ONE-HALE Hrs l PATENT OFFICE. 1

RIGHT TO HENRY C. PREWITT, Oli"` SAME PLACE.

IMPROVEMENT IN HARVESTERS.`

. Specification forming' part of Letters Patent No. 139,787, dated June 10, 1873; application tiled March 31, 1873. I

is a full, clear, and exact description, reference being had to the accompanying drawing,

`and to the letters of reference marked thereon, in which- Figure 1 is a plan view, having a portion of the upper part of the driving-wheel and frame shown in section, taken in line .r zg-Fig. 2. A portion of the top of the finger-bar is removed to show the construction and arrangement of the'cutting-blades. The arrows indicate the Fig. 2fis a sectional elevation taken in the line y y of Fig. 1.

Like letters indicate like parts.

To simplify and cheapen the construction, to lessen the draft, and to obtain a machine that can be readily used in all the positions and under all the conditions that occur in ordinary work, are mainly the objects of my invention.

In the accompanying drawing, A represents a driving-wheel of ordinary construction, provided inside and in its plane with a circular cam-way, B B1 B2 B3, that faces toward the linger-bar side. which the driving-wheel is hung, consisting of two cross-pieces, c and c1, extending on either side across the wheel, being in length somewhat more than the diameter of the driving-wheel, and of two upright pieces, c2 c3, on either side of the wheel, and extending from the horizontal pieces c and c1 respectively up- Both the horizontal pieces and the vertical pieces c2 c3 are respectively united at their ends by crosspieces c1 c3 c3, Figs. 1 and 2. The horizontal pieces c and c1 are suitably and similarly provided with attachments, D and D', at their ends, to either of which the draft-pole can be `fastened. On the finger-bar side of the machine a supplemental frame or upright, E, is

3 attached to the frame C by any suitable fastening. The upright E is provided with slots e c1, extending in the direction of its length. At its lower end the upright E is provided with a projection, e2, extending a short dis- O represents the frame ini tance toward the linger-bar side. To the outer end ot' the projection e2 is hingedthe finger-bar F, which, otherwise of ordinary construction, is provided with a double series of guard-fingers, G G1 G2G3 and H H1 H2 H3, I

arranged respectively oneither side of the linger-bar, as shown in Fig. `1. The `guardugers G G1 G.2 G3 and H H1 H2 H3 are ofthe usual form, but at their rear ends on `top are u rigidly attached ,two-edged pointed blades 1:11 I2 I3 and J J1 'Ji J3, Fig. l. These lixed c blades are arranged horizontally just below c the level of the movable blades or` knives K K1 K2 K3, their outer pointed ends extending about as far as the points of the movable blades. They project equally on both sides of the guard-lingers, to which they are 'attached. The finger-bar isprovided with a top plate, f, that passes over the movable blades, and serves to cover and to hold them in position. K K1 K2 K3 represent movable blades or knives, as shown in Fig. 1. Their general shape is that of a diamond, both ends being similar and pointed. They are pivoted at their ceutersto the center ot' the nger-bar F, and project equally on both sides of the finger-bar. Betweenltheir centers and their points, and on both sides of, their centers respectively, they are also pivoted to two scythebars, L L', respectively. The Scythe-bars L L' extend lengthwise with the finger-bar, and along its edges andattheirfr inner ends, are respectively pivoted to two pitmen, m m', Figs. l and 2, which pitmen, in turn, are respectively pivoted -tothe lower ends of two rocking-levers, n n', Figs. l and 2. c The rockc ing-levers n n' extendupward respectively on each side of the upright E, and are suitably connected at the cross-piece c so as4 to admit of a vibrating motion. At their upper ends,

'its various parts,) the rocking-levers n n', and

the cam-way B B1 B2 B3, is such as to bring one roller, O, against the top of a camjwhile the other roller, Q', is in the depression between two cams, as shown in Fig. 1. "As the j driving-wheel -is turned `lth`e upper ends of the rocking-levers are successively thrown outward, which motion, being transmitted. to their respective Scythe-bars below, causes them to vibrate, and the movable knives K K1 K2 K3 to oscillate on their centers, as indicated by the arrows in Fig. l. It will be observed that in its operation the knife K makes a drawing cut, and, also, owing to the ixed blades I and J and their relative arrangement to the other parts of the cutting apparatus, the distance that the movable knives traverse to accomplish their work is consid erably less than that of an ordinary rigid scythe. An advantage is also gained in applying theV power between the central pivotsl of the movable knives K Kl K2 K3 and their points.

ish the draft. The machine being similarly constructedon both sides it can be operated at will in either direction. `A further gainl The effect of each and all of theseadvant-ages described is to materially diminb9, made use of'.v Its position when"llpturlledi.l A

is Yindicated bythe large arrow, Fig. 2. .Ljs it is raised the inner ends of the Scythe-bars, through their pitmen m m' press the lower ends of the rocking-levers in sufficiently to throw the rollers 0 o' out of gear. the axle P can be extended and a second driving-wheel attached in the usual manner. The seat is attached in the customary mode. To adjust the ringer-bar vertically the upright E is moved up or down, and at the desired position held by tightening the thumb-screws his WILLIAM HARRISON,

mark.

Witnesses :l

ALEX. W. MULLINs, Tiros. BROWNLEE.

If de sired,`

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