US635746A - Harrow. - Google Patents

Description

o 635,746 w. CUGHRAN. Patanted Dot 3|, |899 HABRUW.

(Application filed Dec. 5, 1898.) (No Modul.) 2 Shgets-Sheqt I.

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N0. 635,746. Patented Oct. 3|, |899.

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HABROW.

(Application led Dee, 5, 1898.) (No Model.) 2 Sheets-Sheet 2.

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WILLIAM F. COCHRAN, OF OSBORNE, KANSAS.

HARRow.

SPECIFICATION forming part of Letters Patent No. 635,746, dated October 31, 1899.

Application iiled December 5, 1898. Serial No. 698,3l2 (N0 model- To all whom it may concern:

Be it known that I, WILLIAM F. COCHRAN, a citizen of the United States, residing at Osborne, in the county of Osborne and State of Kansas, have invented a new and useful I-Iarrow, of which the followingis a specification.

My invention relates to improvements in harrows of the class disclosed in United States Letters Patent No. 519,321., issued to me on May 4, 1894; and the object that I have in view is to simplify the construction of my patented harrow, so as to promote the efciency of the structure, render it easy of adjustment, and cheapen the manufacture thereof.

A further object is to provide an improved draft appliance by which the draft on the implement is transmitted to the Wheeled axle to secure uniformity in the distribution of the draft and reduce the strain on the harrowsections.

With these ends in view the inveutionconsists in the novel combination of elements and in the construction and arrangement of parts, which will be hereinafter fully described and claimed.

To enable others to understand the invention, I have illustrated the preferred embodiment thereof in the accompanying drawings, forming a part of this specification, and in Which- Figure 1 is a perspective View of my harrow, showing one section raised and the other section lowered in active position. Fig. 2 is a longitudinal sectional View on a plane at one side of a carrying-wheel, the planeof the section being indicated by the dotted line 2 2 of Fig. 3. Fig. 3 is a vertical transverse section on the line 3 3 of Fig. 2. Fig. 4 is a detail perspective View of one of the angle-bars with a clamp for an adjustable harrow-tooth. Fig. 5 is a horizontal section of the parts shown by Fig. 4. Fig. 6 is a detail perspective view of one -of the suspending-hangers. Figs. 7 and 8 are detail sections through the toothclamp, illustrating the means by which the tooth is confined in the clamp while it is allowed to have a limited fore-and-aft movement in the holder.

Like numerals of reference denote like'and corresponding parts in each of the several figures of the drawings.

10 designates the arched or bowed axle,

which is provided at its ends with the spindles 11, that accommodate the ground-wheels 12. The spindles exceed'the length of the wheel-hubs, so as to leave spaces 13 between the inner ends of said hubs and the arched part of the axle, and the hubs are prevented from being displaced from the spindles by suitable keys or nuts 14, properly attached to the, ends of the axle-spindles. A drafttongue 15 is secured firmly to the upper part of the axle and to a horizontal frame 18, which is secured firmly to said axle, and this tongue is braced by means of stays 16, which are attached to the sides of the tongue and the axle, as shown. The rear end of the tongue supports a seat 16 for the accommodation of the driver, andthe foot-rests 17 are attached to the tongue at a suitable distance in advance of the axle for the driver to place his feet thereon. The horizontal frame 18 extends rearwardly from the axle to lie in the same plane as the upper transverse bar of said axle, and this frame is united firmly to the axle and the tongue by any approved means. The frame carries a notched segment 19, which is secured firmly in place, and the frame is further provided with alined shaft-bearings 20. A horizontal rock-shaft 21 is journaled to turn freely in these bearings, and said shaft is arranged, preferably, on the lower side of the frame 18, to be out of the Way of the draft-tongue. A hand-lever 22 is secured firmly to the rock-shaft adjacent to the notched segment, so that a thumb-latch of ordinary construction may engage with the segment to hold the harrowsections at any desired elevation. The rockshaft serves as the fulcrum for the lever, and said shaft is, furthermore, provided with the crank-arms 22, which are at the ends of said shaft and extend at right angles thereto for the purpose of operatively connecting the lever with the harrow-sections.

In my improved harroW I employ three toothed frames or sections, and of these sections the central frame 23 is constructed to accommodate the carrying-wheels and for direct connection with the adjusting rock-shaft 21. The two side sections or frames '24 25 IOO are disposed on opposite sides of the central I section or frame 23, and each side section is connected 'adjustably with the central section by the pivotal connections or hinges 26. The side sections are adapted to be lowered independently to assume positions in the same horizontal plane as the central section for` the purpose of varying the working area of the implement; but these side sections are carried by the central section, to which the lifting mechanism is connected, so that all the barrow-sections may be adjusted or raised out of their .operative positions when the machine is drawn to or from a field.

Each section of the harrow consists of a se ries of angle-bars 27, which are arranged parallel to each other, and a series of cross-bars 23, the last-named series of bars being secured or united firmly to the angle-bars 27 by any approved means, so as to produce a strong and firm construction of the frame or section. The angle-bars 27 of each frame or section have vertical slots 29 formed in the horizontal flanges of said bars, and through these slots are passed the harrow-teeth 30. Each tooth is confined within a clamp 3l, which is fitted against the vertical and horizontal flanges of the angle-bar 27, within the angle thereof, and each clamp is firmly secured in place by a pair of bolts 32 33, which pass through the clamp and said vertical flange of the angledoar. The clamp 3l is constructed to permit the barrow-tooth 30 to assuine a vertical position or to be adjusted to an inclined position, as will hereinafter more fully appear, and by employing the pair of bolts to fasten the clamp to the angle-bar the clamp itself and the tooth may be held firmly in their adjusted positions. By attaching the teeth to the harrow frame or section the implement is adapted to be drawn in one direction with the teeth occupying vertical positions; but this construction also provides for reversal of the barrow, so that the teeth may' incline backwardly from the bars which carry said teeth.

Each hinged side section or frame may be adjusted into or out of its operative position independently of the other side section of the frame, and in Fig. l I have shown one side frame lowered in the horizontal plane of the central section,while the other frame is raised .to a position substantially at right angles to the sections or frames that are active in harrowing the ground. The hanger or crane arms 34 are in a single piece of rod or bar metal, which extends transversely across the tongue and is secured centrally thereto by a bolt or bolts 35. To this hanger or crane, on opposite sides of the draft-tongue, are loosely attached the brackets 36 by means of .the bolts 37, and each bracket has a hook 3S at one end and a loop or eye 39 at its opposite end. A suspension-chain 40 is connected at one end to each of the hinged side frames, and this chain has a ring 4l, which is con nected permanently with the loop or eye 39 of one suspension-bracket. The chain 40 is also provided with a ring 42 at a point inter mediate of its length, and this chain when cxtended its full length limits the downward adjustment of the hinged side frame or section, so as to maintain the latter in the horizontal plane of the central frame. The operator may easily reach the chain 40 to draw the latter inwardly and raise the side section or frame to the upright or `vertical position illustrated by Fig. l, and the intermediate ring 42 of the chain may be engaged with a hook 38, so as to suspend or maintain said frame in its raised position.

43 44 designate lifting bows, which are disL posed on opposite sides of the cranked axle, and these bows provide the means by which the rockshaf t maybe connected with the central barrow-section 23. The bows are arched and disposed longitudinally of the implement, so as to span the Wheel-spindles and permit the barrow-section 23 to be raised or lowered, and the ends of the bows are secured firmly to said harrow frame or section 23. These bows are in the Vertical plane of the crank-arms 22 on the rock-shaft, and said arms and the bows are operatively connected by the short chains 45, whereby the movement of the rock-shaft in one direction serves to lift the bows, the central barrow-section 23, and the side sections 24 25, which are hinged to the central section 23.

A doubletree 46 is mounted on the drafttongue in a position in advance of the harrowsection 23, and to the ends of this doubletree are loosely attached the upper ends of the draft-bars 47. These draft-bars are perforated for the adjustable connection thereto of whiffletree-hooks, by which the draft-animals may be hitched to the bars,and rings 48 are loosely connected to the lower ends of said bars for attaching the inner ends of pairs of draft-links 49 to the lower ends of the vertical draft-bars 47, said links 49 being loosely connected to the draft-eyes 50, which are fastened to the front of the barrow-section 23. The draft of the animals is exerted on the draft-bars, which are attached to the doubletree and linked to the barrow-section 23, and the strain on this harrow-section is transmitted to the wheel-spindles of the axle by means of the connecting-rods 51 52. Each connecting-rod is connected pivotally, as at 53, to a bracket-lug 54, which is iirmly secured to the front rail of the barrow-section 23, and said connecting-bar is provided at its rear end with a loop 55, which loosely embraces the space 13 of the Wheel-spindle alongside of the inner end of the wheel-hub. The connecting-bars are thus arranged to transmit the draft and strain on the barrow-section 23 to the spindles of the axle, and as these connecting-bars are loosely attached to the axle and pivoted to the frame-section 23 the latter may be raised and lowered by the lifting mechanism without hindrance or interference by the connecting-bars.

Changes may be made in the form and proportion of some of the parts while their essential features are retained and the spirit of IOO IIO

theinvention embodied. Hence I do not desire to be limited to the precise form of all the parts as shown, reserving the right to vary therefrom.

In the construction of each tooth and the clamp therefor I make the clamp or holder with a box or socket 3l, which is rounded and closed at its upper end at 31h, and this socket has a contracted neck 31C below the rounded upper end, the rear part of the socket being inclined or iiared in one direction, as at 31d. (See Fig. 8.) The tooth 30 is provided with an enlarged upper end or head 30, which is fitted in the rounded upper end 311 of the socketed box-clamp, and the shank of the tooth passes through the neck 3lc of the clamp. This tooth is prevented from Working up through the closed upper end of the clamp. The head of the tooth prevents it from dropping out of the clamp because the neck 31C is of a width less than the diameter of the tooth-head, and the tooth has a limited play or movement in the flared part of the clamp, so that when the harrow is drawn in one direction the tooth will assume an inclined position without any possibility of working out of the clamp.

The central frame or member of the harrow has its bars spaced to provide openings or slots 23* for the accommodation of the carrying-wheels, thus enabling the latter to travel in the limits of the harrow without obstruction from the bars of the section 23.

By providing the hanger-arms 34 on opposite sides of the tongue and extending the hanger-arms over the carrying-wheels, as shown byFig. 3, the chains 40 are adapted to rest in said arms and to be held thereby out of engagement or contact with the carrying- Wheels.

What I claim isl. In a harrow,tl1e combination of an arched wheeled axle, a sectional frame havingits side members hinged to the central member beyond the wheels of said axle, the lifting bows arranged to span the wheel-spindles and connected to the central member of said frame, an adjusting mechanism mounted on the arched axle and connected to said lifting bows, the crane fixed to the draft-tongue and extending over the central frame-section, adjustingchains connected to the side members ot' said frame for adjusting said members individually, and hangers secured to the cranes in positions to engage with the adjusting-chains, substantially as described.

2. In a harrow, the combination with a central frame or section and a side frame hinged thereto of a suspension crane or arm provided with a hook and an eye or loop, a chain having its ends attached permanently to the hinged side frame and to the eye of the suspension-crane, and said chain provided at a point intermediate of its length with a ring or loop adapted, on the elevation of the side frame, to engage with the hook of the suspension-crane, substantially as described.

3. In a harrow, the combination with a wheeled axle, a vertically-adjustable frame-.

section, and a draft-tongue, of a doubletree, draft appliances connected with the doubletree and with the frame` or section, and connecting-links between the frame or section and the wheeled axle, substantially as described.

4. The combination with a wheeled axle, a frame or section, and a lifting appliance mounted on the axle and connected with the frame or section, of draft devices attached to the front end of the frame or section, and connecting-bars pivotally attached to said front end of the frame or section and loosely connected with the axle, substantially as described.

5. In a harrow, the combination with a wheeled axle, a toothed frame or section and a lifting appliance, of a draft-tongue disposed centrally with relation to the toothed frame or section and fast with the axle, a doubletree on the axle, the draft-bars attached to the doubletree, links connecting the draft-bars with the front rail of the toothed frame or section, and the connecting-links disposed in planes on opposite sides of the tongue, each link being attached pivotally to the front rail of the frame or section and having its rear end tted loosely on a wheel-spindle of the axle, substantially as described.

In testimony that I claim the foregoing as my own I have hereto affixed my signature in the presence of two witnesses.

WILLIAM F. COCHRAN.

Witnesses:

C. B. HAHN, P. G. WALKER.

ICO

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