Dec. 31, 1,946. W. P. SCHENKELBERG ' > 2,4l3,657 HARRow ATTACHMENT FOR TRAcToRs Filed May 6, 1944 3 Sheets-Sheet 1 De@ 31, 1.946- w. PTSCHENKELBERG n 2,413,657 HARROW ATTACHMENT FOR TRACTORS >Filed-May> 6, 1944 / 5 sheets-sheet 2 Zmventor Dec. 311i 1946. W. P. SCHENKELBERG 2,413,657 HARRÓW ATTACHMENT FOR TRACTORS Filed May 6. 1944 5 Sheets-Sheet 3 s __ __ MKM Cîttornegâ 2,413,657 Patented Dec. 31,r 1946 UNITED STATES PATENT OFFICE 2,413,657 HARROW ATTACHMENT FOR TRACTORS William P. Schenkelberg, Carroll, Iowa Application May 6, 1944, Serial No. 534,449 5 Claims. (Cl. 97-5) l Figure 7 is a vertical section taken on the line The presentl invention relates to improvements in harrow attachments for tractors and the prin cipal object of the invention is to provide an l-l in Figure 6. improved draft and lifting means for a conven 8-8 also in Figure 6. tional type harrow which will act to draw the narrow along at the side of the tractor and also act to lift and lower the tractor from and to soil engaging position. > » Figure 8 is a similar view taken on the line l Referring more particularly to the drawings a Ford o-r other tractor is indicated inYdo-tted lines at II) with the usual trailing plows I I which are adapted to tbe lifted and lowered by the power lift mechanism which isv a part of the In the drawings, which illustrate only one me equipment of conventional tractors. Y chanical embodiment of which the invention is The plow lift is indicated generally at I2. vThis susceptible, the invention is illustrated as applied plow lift connects with the horizontal arm I3 to a Ford type of tractor but it will be under pivoted at I4 on the tractor frame. stood that it is equally useful in connection with In accordance with the invention a clip device, other makes of tractors. Another object of the invention is to provide 15 shown more particularly in Figures 4 and 5 is constructed so as to be sprung or fitted over the an improved device for utilizing the power lift horizontal arm I3. Such clip device preferably of a convenient tractor for lifting and lowering consists of a lever arm I5 positioned to fulcrum the harrow drag frame automatically with the raising and lowering of therplows at the back of the tractor. A further object of the invention is to provide equipment of simple construction involving a about the pivot M; The lever arm I5 is secured in place by a substantially U-shaped clip I6 of spring metal or other desired material which is adapted to ñt over the horizontal lift arm I3. draft attachment to receive a conventional form of harrow, which draft attachment is so con In a similar manner a similar lever arm I'l promote high efficiency in operation, to reduce the strains incident to operational movements and in- general to improve equipment of this char necting bar I9 and perforated for receiving the carries a clip I 8 having an open mouth at its structed and larranged as to be mounted upon 25 lowerV portion and adapted to be sprung over the horizontal arm I3. The lever arms I5 and Il the side of conventional tractors in a quick' man are connectedv` together by a bar I9, welded, ner with an operable connection adapted to be brazed or otherwise secured to the lower portions clipped onto'a movable part of the plow ele of the two lever arms I5 and Il. The lever arm vating mechanism to thereby join the harrow I5 which is the work arm preferably is longer carrier for concurrent lifting and raising oper than the arm Il which acts as a brace arm to ations _from the power lift of the' tractor. gether with the bar I9, the lower end of lever Other objects of the invention are to gener work arm I5 preferably extending below con ally simplify and strengthen the construction, acter. With the foregoing and' other objects in view, the invention will be more fully described herein after, and will be more particularlyv pointed out in the claims appended hereto. ` In the drawings, wherein like symbols refer to like or corresponding parts throughout the several views, Figure l is a top plan view of a tractor, shown in. dotted lines and of the improved harrow at tachment shown in a lowered position. vFigure 2 is a side elevation of the same. Figure 3 is e. front elevation of the same. Figure 4 is a perspective view of the clip con nection- to the power lift. Figure 5l a vertical section taken on the line in. Figure i. Figure 6 is a top plan view of' theV motion r translating device. hooked end of a rod 2li. This rod 2l! runs for ward and diagonally upward and is hooked or otherwise connected with a perforated or other arm 2l of a lever plate or transmitting lever 22. Such plate 22 is generally in the form of a T with the perforated arms 2! and 23 in substan tial alignment and at the opposite end from the fulcrum point 24. of the lever plate 2.2. This lever plate and its mounting are shown more particularly in Figures 6, '7 and 8 in which the lever plate 22 is shown as assuming a diagonal position at the upper end of a tubular or other standard 25, the upper end of which is closed' by a bearing plate 26 having an extension 21 at its lower side serving the purpose of re ceiving therethrough the fulcrum bolt 2liY .as morev particularly illustrated in Figurev 8. l The supporting" standard 25 is intended to be held with its axis substantially> vertical and rigidly in place. For this purpose a hooked rod 28 may 2,413,657 3 4 Well serve the purpose, the hook of the rod ex tending about the tractor brace 29. Arm 23 of the bell crank lever 22 connects by means of a rod 30 or by other connection to an adjusting bar 3| which attaches to the frame work of the lift. The lower end of the standard 25 may be con lift the plows Il, the arm I3 will be accordingly angularly raised about its pivot point I4. This will cause lever arm l5 to be also rotated in a clockwise direction thereby exerting a rearward pull upon rod 20 and rotating the machine or bell crank lever 22 about its fulcrum 24. This action will exert a pull upon the rod 30 thus elevating veniently carried upon a sleeve 32 (Figures 6, '7 the frame work and attached harrow in a rotary and 8). The inside diameter of this sleeve is manner because of the connection of these parts sufficiently large to permit it to slide over a shaft 10 to the shaft I0. It will be noted that the actu 33. The sleeve 32 is kept from axial sliding move~ ating lever 22 has an inclination both rearwardly ment on the shaft 33 by two burrs 34, 35 or other and laterally outwards. In other words it is set suitable means. This permits the shaft 33 to ro at such an angle that the stresses in rods 2|) and tate freely within the sleeve 32. ' 3B and in the plate lever 22 itself all act approxi The shaft 33 may be a hollow type of metal 15 mately in one plane. or other appropriate material set approximately When the power lift mechanism of the tractor parallel with the longitudinal axis of the tractor is reversed to lower the plows, the action of lever and having trunnions 36 and 31 mounted respec arm I5 will be reversed, that is it will have moved tively in bearings 38 and 39, The shaft 33 has counter-clockwise or forwardly thus lowering the free rotational movement in these bearings about 20 frameworkand attached harrow to an operative a substantially horizontal axis. The bearing 39 position with respect to the soil. may be attached to the tractor by the same bolts It is obvious that various changes and modi 40 which hold the guard 4| in place. The bear fications may be made in the details of con ing plate 38 may be attached to the tractor brace . struction and design of the above speciñcally de 29 by means of a U-bolt 42 or other appropriate 25 scribed embodiment of this invention without fastening. The adjusting piece or bar 3| is preferably of ñat strap iron cut with notches 43 (Figure 3) departing from the spirit thereof, such changes and modifications being restricted only by the scope of the following claims. What is claimed is: slotted detent plate 44 which is rigidly aiiixed to 30 l. The combination with a tractor, a rotary the frame work of the lift. shaft carried at the side of said tractor, a harrow This frame Work in its preferred form consists attachment frame work comprising spaced longi of two longitudinal members 45 and 46 (Figure tudinal bars secured at one end to said shaft, 1), two transverse members 41 and 48 and one transverse bars connecting the intermediate and sway brace 49 which extends diagonally across outer portions of said longitudinal bars, a diag the rectangular frame and in fact lies outside the onal sway brace coupled between both said lon~ rectangular frame where it extends over to the gitudinal and transverse bars and extending out front end portion of the rotary shaft 33 to which side the rectangle formed by said frame Work and it may be afûxed as by welding or the like. having an end affixed to said shaft, and a truss This frame work is trussed or has a bridge structure for said frame work. effect which consists of two upright members or 2. The combination with a tractor having a posts 5| and two rods 52 and 53. The two rods power lift, a rotary shaft, means detachably con extend beyond the joint at whichn they are at nected to said tractor for supporting said shaft tached to the outer end of the frame work and for rotary movement at one side of said tractor, 45 are curved upwardly to form two hooks 54 and 55. a harrow attachment aflixed to said shaft, a The frame work is rigidly amxed ,to the tubular transmitting lever supported from said tractor shaft 33 by welding or other suitable method of and having a plurality of arms, a connection from which are designed and adapted to catch into a one arm to said power lift, a connection from the other arm to an intermediate point on said har zontal adjusting bar 51 over the hooks 54 and 55 50 row attachment, a standard supporting said (Figure 3). The freedom of movement of the transmitting lever, a sleeve on which said stand attachment. , The harrow 56 is attached -by hooking its hori shaft 33 .about .its horizontal axis permits the frame work to rotate to approximately a ver ard is erected, said sleeve' ñtting non-rotatively about said shaft, means for preventing axial tical position and thus be within the overall Width movement of said sleeve on said shaft, and means of the tractor. 55 coupled between said standard and tractor for While the device may be made in any dimen holding the >standard and sleeve against angular sions, for a standard Ford tractor, the following motion. . dimensions have given excellent results in prac 3. The combination with a tractor having a tice: power lift, a rotary shaft, means detachably con ' Inches 60 nected to said tractor for supporting said shaft Frame work 20 x 56 for rotary movement at one side of said trac Angle irons in frame work ___________ __ , 1% tor, a harrow attachment affixed to said shaft, Sway brace strap ___________________ __ l a transmitting lever' supported from said tractor Rods 20 and 30 ______________________ __ % 65 and having a plurality of arms, a connection Tubular shaft 33 made of 2” pipe. Tubular shaft, length ________________ N ` from one arm to said power lift, a connection from the other arm to an intermediate point on 53 said harrow attachment, an adjusting piece in the The device is manufactured and sold separate ly from the tractor if desired and may be mount ed thereon in a very simple manner by putting in place the bearing plates 31 and 38, at the same time mounting the shaft 33 therein’and then clip ping the clip device over the horizontal lift arm I3. f - connection between said harrow attachment and transmitting lever, said adjusting piece compris ing anotched bar, and a spring plate on the har row attachment having a slot to receive said .bar and a wall of the slot to receive the notches of ' In use, Whenever the power lift is actuated to < said bar. 4. In combination with a tra'cmrnaving a 2,413,657 5 6 cured to move therewith and comprising a work means on the tractor coupled to said lever work arm and to said barrow. 5. The combination claimed in claim 4 char acterized by the fact that each lever arm has a spring clip and the work lever arm extends down lever arm, a brace lever arm and connecting means between said arms, a barrow movably at it is coupled to the harrow lift means. power lift, a plow, and a plow beam pivoted to the tractor for vertically swinging movement, a connection between the power lift and plow beam a clip device mounted over said beam and se tached to the side of said tractor, and harrow lift below said connecting means at its free end where WILLIAM P. SCHENKELBERG.