US252279A - Cultivator-toqth - Google Patents

Description

' (llodelJ W. A. VAN BERUNT.

GULTIVATOR TOOTH. A No. 252,279. Patented Jan. 10,1882.

WITNESSES a 1 INVENTOR UNiT EDI PATENT QFFIC Q- WILLARD Ar VAN BRUNL, OF HORICQN, WVISGONSIN.

cu L rivAToR-Io 0.T.-H.

; SPECIFICATION forming part of Letters: Batent No. 252,279, dated January 10, 1882.

Application filed se t ters esr m ad.)

To all whom it may concern:

. Be it known that I, WILLARD A. .VAN BRUNT,of Horicon, in; the county of Dodge and State of Wisconsin, have invented. certain new and useful Improvements .in Reversible Spring-Teethfor Cultivators; and I- dothereby ,declarethe following to be a full, clear, and ex act description of? the invention, such as. will enable others skilledtin the arttowhichitv per+ a perspective view of a drag-bar. with my im- .provement attached thereto Fig. 2 is a vertical sectional view of the same. Fig. 3 is a horizontal section, showing the manner of attaehing the tooth to the slip-plate; and Fig. 4, a, b, c, and d, represent modifications.

A represents a wooden cultivator-beam or drag-bar, provided with the open oblong slot B at its rear end, into which the friction or slip plate 0 is adapted to fit and be securely clamped thereinby the bolt a and not b. This slip-plate O is provided with the bolt-hole in its body portion, through which the bolt a passes, and with a shank, D, to which the tooth is attached. This shank D, when the plate 0 is in position, extends downwardly and rearwardly from the body, and is provided with a convex outer surface or edge, against which the concave face of the tooth fits snugly, and is also provided with two cars, cl, on opposite sides thereof, adapted to afford increased bearing-surface for the tooth. This shank D is also provided with a hole, 6, situated immediately in front of the ears d, for the passage of the clip E, which, together with the clip-plate F, firmly holds the tooth on the shank of the slip-plate. I have shown the clip E passing around the ears d and up through the clip-plate butirtieam-if desired, pass up through holes intheears d, which latter can be extended out farther for that purpose. The clip-plate F is adaptedto be secured to the shank l) bythe clipE: and hold thereversible spring-tooth between it andithews-hanlqand for this purpose is providedwithatwo holes, f, through which tllGiEIltlS of the'clip pass, and are secured by nuts-.9, whieln whentightened, firmly hold the toothin. position andprevent it from sliding up,.the: upper point of the tootlrpreventing it from. slipping-down if the nuts should by any means. become loosened. This. cliptplate "F is alsoprorided witlran upper and lower extension, hand h, the lower extension, h, being longer than the upper one, and reachin g below the extreme-end of the shank, and forming an upperbearing for the tooth. This plate F is also providedwith a longitudinal groove, 6, running. centrally through its under surface, andadapted to fit over the rib-.Gflunning longitudinal-ly, over theconvex snrface of the tooth, and. prevent the tooth from moving laterally between the-shank D andtheclip-pla-te F.

*The tooth H is constructed of spring metal,

ot" the shape shown, and is provided with the rib G on its convex side, which materially strengthens the tooth and allows it to he made lighter in structure, and at the same time withstand the strain and shock of a heavier tooth. This tooth is provided on its opposite ends with the points I, which latter can be of the same shape, or of different shapes to suit dif ferent kinds of work and soil. By this means the'cultivator is made changeable, at a slight increase of cost, from one kind of work to another with but little trouble to the operator.

The friction-plate O is confined wholly in position at any desired angle by the friction due to the binding action of the bolt a and nut b, and it is evident that if the tooth H should come in contact with an obstruction of a rigid nature which could not be displaced by the tooth the friction or slip plate would yield and allow the tooth to ride over the obstruction, thereby preventing any fracture to the tooth, slip-plate, or connecting parts. In the modification, Fig. 4, I have representedthe ears d of the shank extended out sufficiently to allow two set-screws,j, to be used instead of the clip E, already described.

Fig. 4 represents the clip-plate F, provided and adapted to operate substantially as those already described.

My improvementpossesses advantages over those machines wherein a slip-plate'is used in combination with a rigid tooth. In the above case, when the rigid tooth meets an obstructionheld sufficiently tight in the ground to prevent its being disturbed by the tooth, the

' tooth immediately rides over the obstruction,

and has tobe adjusted every time anobstacle is encountered. In my case, however, the spring-tooth bends sufficiently in many cases, where the obstruction is deep, to enable it to be d'rawnover the obstruction without the ne cessity of theplate slipping. If, however, the point of the tooth should become engaged with the obstruction and the latter refused to yield after the-spring l'i ad been bent to a given limit,

the manner of fastening the tooth thereto,

could be resorted to without departing from the spirit of my invention, and I would have it understood that I do not limit myself to the 7 precise construction shown and described, but consider myself-at liberty to make such changes as come within the spirit and'seope of my invention.

Having fully described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. The combination, with the slotted bar, of

a slipping plate pivoted thereto and having the perforated shank, a spring-tooth secured to the latter, a clip-plate adapted to brace the tooth, and a clip for holding the tooth and clipplate in position, substantially as set forth.

2. The combination, with the bar having an open slot at one end, and a slipping plate consisting ofa body and shank, the body of the said plate adapted to be secured in the slot, while the shank extends outward in a rearwardly-inclined direction, and a pivotal bolt for retaining the plate in any desired adjustment, of a double-pointed reversible springtooth secured to the said shank, substantially as set forth.

3. The combination, with the bar, of the slipping plate pivoted thereto, a double-pointed reversible spring-tooth having a longitudinal rib, a clip-plate having a longitudinal groove corresponding to said rib, and devices for securing the slipping plate, clip-plate, and tooth together, substantially as set forth.

4. The combination, with the pivoted slipping plate having a'perforated seat or bearing on its shank portion, of a spring-tooth provided with a strei'lgthening-rib, a clip extending through the perforated seat or bearing, and a clip-plate provided with a longitudinal groove, substantially as set forth. I

In testimony whereof I have signed this specification in the presence of two subscribing witnesses.

WILLARD A5 VAN BRUNT.

Witnesses:

D. D. FRENCH, WM. J. MLTER. e

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