US472185A - Spring-tooth harrow - Google Patents

Description

t e e m e e W N0 R R A H PT 0 m G VN Patented Apr. 5,1892.

xhtmeow (No Model.) 2 SheetsSheet 2. F. VAN PATTEN.

SPRING TOOTH HARROW.

No. 472,185. Patented Apr. 5,1892.

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SPRING-TOOTH HARROW.

SPECIFICATION forming part of Letters Patent No. 472,185, dated April 5, 1892. Application filed January 8,1890. Serial No. 336,326. (No model.)

To all whom it may concern.-

Be it known that I, FREDERICK VAN PAT- TEN, a citizen of the United States, residing at Auburn, in the county of Cayuga and'State of New York, have invented a new and useful Spring-Tooth Harrow, of which the following is a specification. 1

This invention relates to spring-tooth harrows; and it has for its object to construct a harrow of this class which shall possess superior advantages in point of simplicity, durability, and general efliciency.

With these ends in view the invention consists in the improved construction, arrangement, and combination of parts, which will be.

hereinafter fully described, and particularly pointed out in the claims.

In the drawings hereto annexed, Figure 1 is a perspective view of a spring-tooth harrow embodying my several improvements. Fig. 1 is a perspective detail view of one end of the barrow-bar, showing the recess or cutaway portion. Fig. 2 is a longitudinal vertical sectional view taken through the main barrow-beam and one of the spring-teeth secured directly to the same. Fig. 3 is a longitudinal vertical sectional view taken through the main barrow-beam, one of the extensionbars, and the spring-tooth secured to the latter. Fig. 4 is a perspective detail view of one of the spring-tooth seats. Fig. 5 is a perspective detail view of one of the extension-bars. Figs. 6, 7, 8, 9, and 10 are perspective detail views illustrating modifications in the con-- struction of the spring-tooth seats and the extension-bars.

Like numerals of reference indicate like parts in all the figures.

The main frame-bar of my improved harrow may be constructed in a single piece; but it is preferably, as shown in the drawings hereto annexed, composed of two parts or pieces 1 1, connected at their adjacent ends by a hinge-joint 2. The upper sides of the parts composing the main frame-bar are channeled or provided with a concave groove 3, extending through the length of the said frame-bar.

The upper sides of the parts 1 1, composing the main frame-bar, are provided at suitable intervals with recesses 4 to accommodate the tooth-seats 5 or the extension-bars 6, which are bolted, riveted, or otherwise suitably secured to the frame-bars 1 1, alternating with each other. It will be observed by reference to Fig. 1 that in the formation of these recesses only a very small quantity of material at the upper edges of the ground or channeled bar requires to be removed, thus not detracting materially from the strength of the bar. The tooth-seats are composed of metal plates having slots 7 and curved upwardly in the direction of their widths, as shown clearly in Fig. 4 of the drawings, so as to form the lugs or ears 8 8, the under sides of which afford seats or bearings for the transverse bolts 9, upon which are pivoted the cam-plates 10, having set-screws 1l,adapted to press or bear against the shanks of the spring-teeth 12, which latter are in practice inserted under the cam-plates, and are thus held by the conjoint action of the said cam-plates and the set-screws.

The extension-bars consist of metallic bars or plates of suitable length, the inner ends of which are secured to the frame-bars and the outer ends of which are provided with toothseats of the construction just describedthat is, the outer ends of said extension-bars are provided with slots 7 and are curved or bulged upwardly to form the lugs or ears 8 8, forming bearings for the pivotal bolts of the camplates. The central or intermediate portion of each of said cam-plates is also preferably curved upwardly for the purpose of more readily clearing any obstructions that may be encountered.

The construction of the individual springteeth is no part of my present invention. By arranging the tooth-seats alternately with the extension-bars two separate rows of teeth are practically formed without the use of crossbars or other devices to obstruct the passage of hard clods and other obstructions. By securing the tooth-seats and the extension-bars in the recesses 4 all tendency to lateral vibration is prevented, which is very desirable. To assist in accomplishing the latter purpose, the tooth-seats and extension-bars are preferably provided on their under sides with transverse fianges 13 to engage the front and rear sides of the main frame-bar. The upper sides of the frame-bars 1 1 may also be provided with upwardly=ertending lugs or studs, as

shown at 14, to bear against the sides of the tooth-seats and the extension-bars.

In practice the spring-teeth may sometimes be bolted directly to the main frame-bars or to the outer ends of the extension-bars, and I reserve the privilege of so doin Various modificationsin the construction of the tooth-seats and extension-bars might also be adopted, and in the drawings hereto annexed several such modifications have been shown. Thus in Fig. 6 I have shown a toothholder consisting simply of a plate 15, having downwardly-extending transverse flanges 16, adapted to bear against the front and rear sides of the main frame-bar and provided with upwardly-extending longitudinal flanges 17 to prevent lateral vibration of the springtooth, which, together with the seat, is secured to the frame-bar by a single vertical bolt. In Fig. '7 the tooth-holder is shown to consist of a plate having downwardly-extending transverse flanges to engage the frame-bar and upwardly-extending lugs 18, which are perforated to receive the pivotal bolt 19 of a camplate 20, having set-screw 21. In Fig. 8 the tooth-holder consists of a plate having later ally-extending flanges 22 to receive the securing bolts or rivets and upwardly-extending cars 23, through which passes a transverse bolt or pin 24. The cam-plate 25, having the set-screw 26, is provided in its upper side with a transverse groove 27 to engage the pin or bolt 24:. In Fig. 9 an extension-bar is shown consisting of a channel-bar28, the side flanges of which 29 are provided with series of perforations 30, in any of which may be adjusted the transverse pin or bolt 31, on which is pivoted the cam-plate 32, having the set-screw 33. By this construction the spring-tooth is made capable of adjustment upon the extension-bar. In Fig. 10 an extension-bar is shown provided at its outer end with flanges 3 for the transverse pin or bolt 35, upon which is pivoted the cam-plate 36, having the set-screw 37.

Numerous other modifications might be devised, and I merely select the foregoing for the purpose of illustrating.

The harrow-bars 1 1 are provided with forwardly-extending brackets 38, which are connected by link-rods 39 with the evener-bar 40, which consists of a longitudinally grooved or channeled bar which may be formed by bending or doubling a plate or strip of sheet metal of proper dimensions upon itself. Centrally to the evener-bar is secured a clevis 41, to which is attached a whiflletree constructed in the same manner as the evener-bar and provided at its ends with draft-hooks.

The operation and advantages of this invention will be readily understood by those skilled in the art to which it appertains from the foregoing description, taken in connection with the drawings hereto annexed.

The general construction is exceedingly simple and inexpensive and is of such a nature as to enable any one of the spring-teeth to be easily and quickly detached or replaced, as occasion may require.

By attaching extension-bars to the main frame and applying the harro w-teeth both to the frame and the extension-bars I am enabled to use a set of teeth of the same size and yet secure the alternate double rows of teeth, as shown.

Prior devices, as far as I am aware, have heretofore increased the size of the outer row of teeth in order to form the alternate set; but this course is open to objection, and I aim to avoid it by the present improvement.

Having thus described my invention, I claim and desire to secure by Letters Patent of the United States- 1. In a spring-tooth harrow, the combina tion, with a frame-bar, of extension-bars secured at right angles thereto, and the springteeth secured to said extension-bars and to the frame-bar alternately with the extensiombars, substantially as set forth.

2. In a spring-tooth harrow, the combination of a frame-bar, the tooth-seats and ex- .tension-bars secured to said frame-bar alternately with each other, and the spring-teeth secured to said tooth-seats and extension-bars, substantially as set forth.

3. A spring-tooth holder consisting of a plate having a longitudinal slot, said plate being curved upwardly in the direction of its width to form ears or bails at the sides of said slot, in combination with a pin or bolt inserted under the said bails above said slot, a cam'plate mounted pivot/ally upon said pin or bolt, and a set-screw extending through said cam-plate and bearing against the upper side of the tooth-holder, substantially as and for the purpose set forth.

4:. In a harrow employing a series of equalsized extension-bars which are secured to the main frame-bar, the attachment of one set of harrow-teeth to the outer end of said extension-bars and another set directly to the main frame-bar intermediately between each extension-bar, both sets of teeth being of the same size, so as to cause the harrow-teeth to arrange themselves in two alternate rows, as set forth.

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

F. VAN PATTEN.

Vitnesses:

J AMES LYON, CHARLES L. PRICE.

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