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Sept. 3, 1946. ‘E. s. THOMP-SON ' 2,406,866 I DISK HARROW Filed Maroh_21, 1944 ‘ 2 Sheets-Sheet 1 v / ' / .zi'flfes'i‘a Téaw?sajzv INVENTOR ATTORNEIYS Sept. 3, 1946. E. s. THOMPSON 2,406,866 DISK HARROW Filed March ‘21, 1944 2 Sheets-Sheet 2, \ \ k .31“Weh9%am.‘ ATTOR N EYS Patented Sept. 3, 1946 2,406,866 UNITED i STATES PATENT: OFFICE '" ‘ 8 2,406,866 ‘ “1 V '@ ‘DISK HARROW Ernest S. Thompson, Stockton, Calif.‘ Application March 21, 1944, Serial No. 527,428 I 8 Claims; 1 My invention relates to agricultural imple ments and has among its objects and advan tages the provision of an improved disk harrow of the tandem type, wherein novel means are in corporated for easily and quickly adjusting the disk units to different relative angular relation ships as well as laterally with respect to each‘ (Cl. 55-83)‘ The bar, 26 extends through the bar 28, the members 46 and 48 being spaced su?iciently far apart to freely accommodate the bar 26 there between without objectionable vertical play. ,_ The beam 38 is somewhat narrower vertically ‘ than’the‘ member 40,, see Figures 4, 5 and 6, ‘and is clamped to the‘ member 40. by straps '56, ex other without changing the spacing between the tending transversely of‘ the beam and mounted units, and in which the construction is such as to on bo1ts_58,‘58a and‘ 60.‘ The bolt 58 is welded facilitate adjustment of essential parts without 10 to the upper and lower faces“ of the member 46 so the necessity Of removing bolts and the like. ‘ as to be. spacedapart agdistance greater than the In the accompanying drawings: ' vertical width of the beam 38-. The U—.bolt.58a Figure 1 is a plan view of the invention. straddles the member 46 and is adjustable longi Figure 2 is a- vertical sectional view through tudinally thereof so that, in some settingsof the. one of the disk units. ' - Figure 3 is a sectional view‘ along the line 3-3 of Figure 2. . Figure 4 is asectional view along the line,4-—4 of Figure 1. Figure 5 is a sectional view along the line 5—-5 of Figure l, and I , Figure 6 is a sectional View along the line 6—6 of Figure 1. > In the embodiment of the invention selected beam‘ 38, it‘maybe‘ ‘arranged to clear the draw bar link 86. ‘ Thebolts 60 ‘are also weldedto the member 40, but to its verticalface, so as to lie closely to the beam 38, the ?t being such as to permitsome pivotal movement of the beam 38 on one or both bolts 60 as a horizontal fulcrum and relatively to the member 48. ‘ . One of the bolts 58 includes a strap portion 62 in which is threaded aset screw 64 engageable with__ the beam 38 adjacent one end thereof. for illustration, I make use of frontand rear disk 25 While the bars 26 ‘and 28 pivot freely about ver harrow units l6 and I2. These units comprise frames l4 and I6, respectively, each supporting disk soil cultivating tools [8, with the, tools l8 in one unit reversed with respect to the tools in the other unit. The tools IS .in each unit are operatively connected by the usual spools 20 mounted on a square shaft, as at 22 in Figure 3. tical axes, the pivotal connections between these bars and the respectiveframes I4 and I6 issuch as to substantially eliminate all pivotal move ment of the barsabout horizontal axes. Thus, the frame I6 may.‘ beaccurately adjusted with respect “to the frame l4, as when arranging the two frames in a common plane, or when adjust Such mountings are old and Well known in the ing the two frames relatively to eachother and art. Su?ice it to say that the disk tools are about horizontal axes, if ‘such adjustment is de mounted for rotation on their respective frames. 35 sired. The ‘clearance between the beam 38 and The shaft may, of course, be rounded. ' The two units H] and I2 are tied together by a cross coupling 24 comprising bars 26 and 28 having their ends pivotally connected with the respective frames l4 and I6. The bar 26 com prises a, channel 36 having one end pivotally con nected at 32 with the frame l6 and a channel 34 pivotally connected at 36 with a beam 38 clamped the .twos‘ets of bolts 58 issufficient to permit all necessary pivotal adjustment of the beam 38, and the set screw 64 functions as a stop which facili tates pivotal adjustment of the beam. Lateral adjustment of the frames I4 and I6 maybe made by adjusting the beam 36 longi tudinallylof the member 40.,‘ Such adjustment is made‘ by loosening the straps 56 and then to the rear member 48 of the frame l4. The shifting the beam‘38 ‘the desired distance rela two channels 38 and 34 are adjustably connected 45 tively to the member 48. In‘ mounting the beam together by bolts 42, see Figure 5, extending 38 on the member 40, this member comprising through openings in one channel and through the rear structure ‘of the frame l4, adjustment slots 44 in the other channel, so that the bar 26 ' of the ,beam ' 38 longitudinally of the member may be adjusted for length. The bar 28 comprises members 46 and 48 each 50 46 does not alter the spacing between the frames l4andl6.“ ,. I ‘I i pivotally connected at 56 with the frame l6 and ‘ A ‘strap 66 is pivotally connected at one end at 52 with the beam 38. The two members 46 with a. channel bar 66-welded to the front mem and 48 are ?xedly connected together in prede ber ‘Ill of the irame‘ll4. The‘ strap'66 is pro termined spaced relationship by a spacer 54 which is welded to both members, see, Figure ‘6. I vided with openings" throughout ‘its length, anda pivot ‘pin 14 is‘ selectively receivable in 2,406,866 3 4 openings 16 in the ?ange 68 and one opening and I2 toward a more parallel relationship. the pin ‘I4. The link 86 extends loosely through ’ a guide 98 and has its other end shaped for of the wheel 98 and is receivable in the groove I88 as the wheel 98 is brought to its normal This adjustment is easily controlled through mere in the strap 66 to pivotally connect the latter manipulation of the line H2, since the wheel with the ?ange. By reason of its form, the bar '98 is rotated only when in driving engagement 68 provides a stiff support for the pin ‘I4. with the ?ange 96. The two units I8 and I2 A draw bar 18 isrprovided with upper and may be brought into any desired angular rela lower ?anges 88 which embrace the strap 66 and tionship by controlling the driving period of en which are provided with Openings 82 for selec gagement between the wheel 98 and the ?ange 96. tive reception of pins 84 which pass through A tension spring I24 is connected with the selected openings 12 in‘ the strap 66 to adjust ably connect the draw bar with the strap. Thus 10 lever H8 and the frame I88 to normally hold the lever in the position of Figure 2. When in the draw bar ‘I8 may be shifted to different po this position, the wheel 98 is positively restrained sitions longitudinally of the strap 66, as well as from rotation through the medium of a brake connected therewith in different angular posi band I26 having its ends attached to the frame tions. I88 and extending substantially 180 degrees about A draw link 86 is provided for the frame I6, the wheel 98. This band is provided with a V which link has one end pivotally connected at shaped brake lining I28 which lies in the plane 88 with the end of the strap 66 remote from selective reception in openings 92 in a ?ange 84 20 position of Figure 2. The wheel 98 is restrained from rotation in a sufficient degree to be capa welded to the frame I6. ble of holding the units I8 and I2 in different The strap 66 and the link 86 are connected angular positions. with the tow ends of the frames I4 and I6, re When the line H2 is released, the spring I 24 spectively, so that when a pull is exerted on the jerks the lever H8 back to bring the wheel 98 draw bar ‘I8, the frames I4 and I6 move to the 25 into braking engagement with the lining I28 as angular positions of Figure 1, with One corner soon as the pull line H2 is released. The line of the frame I6 lying in engagement with the I I4 may be released by imparting a slight pivotal member 49. A rearward thrust on the draw bar movement to the lever I I8 from its position of ‘I8 imparts relative movement to the frames I4 and I6 toward parallel relationship, or beyond. 30 Figure 2. This brings the wheel 98 out of hold ing engagement with the lining I28 so that the Means are provided for easily and quickly resistance effective on the rear unit I2 will exert changing the angular relationship between the a su?icient pull on the line H4 to increase the frames I4 and I6 while the implement is in op angle between the units I8 and I2. ' eration. This means comprises an annular and Without further elaboration, the foregoing 35 V-shaped ?ange 96 on one of the spools 28, see will so fully explain my invention, that others Figures 2 and 3. This ?ange is coaxial with may, by applying current knowledge, readily the spool. Located above the ?ange 96 and in adapt the same for use under various conditions the plane thereof is a wheel 98 provided with a of service. V-groove I88 contoured in accordance with the ?ange 96 so that the ?ange and the wheel may 40 I1. claim: A disk harrow comprising a front frame be frictionally connected by lowering the wheel 98. The wheel 98 is rotatably mounted on a shaft I82, which shaft is provided with eccentrics I84 ?xed thereto and rotatably mounted in bearings I86 mounted on a frame I88 attached to the frame I4. A lever H8 is secured to the eccen trics I84 for connection with a control line H2 which may be manipulated from a position on and a rear frame each having a rotative soil cultivating disk means, crossed bars pivotally connected with said frames, a draw bar means r pivotally connected with one end of the front frame and with the other end of the rear frame to swing the frames to a predetermined angular position, and means actuated by cultivating movement of one of said rotative soil cultivat the tractor to which the implement is attached. 50 ing disk means for moving said frames to differ ent angular positions. Figures 2 and 3 illustrate the wheel 98 as being 2. A disk harrow comprising a front framev lifted from the ?ange 96, but the wheel may be moved into driving engagement with the ?ange 96 by exerting a pull on the line H2, which piv and a rear frame each having a rotative soil cultivating disk means, vcrossed bars pivotally connecting said frames, a draw bar means pivot ots the eccentrics I84 clockwise and lowers the ally connected with one end of the front frame shaft I82 suf?ciently far to bring the wheel 98 and with the other end of the rear frame to into engagement with the ?ange 96. swing the frames to a predetermined angular po A line I I4 is attached at one end to the frame sition, means actuated by cultivating movement I6 and passes around a grooved guide wheel H6 of one of said rotative soil cultivating disk means 60 mounted on the member 48 and then around a for moving said frames to different angular posi guide wheel I I 8 mounted on the frame I88. From tions, and means mounted on said front frame the wheel H8, the line H4 passes underneath in contact with said third mentioned means for the hub I28 of the wheel 98 to be wound there normally maintaining said third mentioned on. A ?ange I 22 is attached to the wheel 98 and coacts with the Wheel and the hub to pro 65 means inoperative and restraining said frames from movement with respect to angular dis vide a spool on which the line I I4 may be wound. placement. ' To adjust the units I8 and I2 to different rela 3. The invention described in claim 1 wherein tive angular positions from those shown in Figure one of said crossed bars is provided with spaced 1, a pull is exerted on the line H2 to bring the members and in which the other bar extends wheel 98 in engagement with the ?ange 96. As loosely between said members for relative move the ?ange 96 is ?xed to its carrying spool28, ment in a horizontal plane but restrained from the ?ange is rotated with the spools and the relative vertical movement. . disks for imparting rotation to the wheel 98. 4. The invention described in claim 1 wherein Such rotation of the wheel, 98 winds the line H4 on the spool and brings the two units I8 75 means are provided for attaching said crossed 2,406,866 bars to said front frame for adjustment laterally of the front frame. 5. The invention described in claim 1 wherein a beam is mounted on said front frame for ad justment about a, horizontal axis, and in which said crossed bars are connected with said beam._ 6. The invention‘ described in claim 1 wherein a beam is mounted on said front frame for ad justment about a horizontal axis, and in which ing disk means of the front frame for rotation therewith, and means mounted on said friction drive for moving said spool into frictional driv ing engagement with said friction drive. 8. The invention described in ‘claim 2 wherein said third mentioned means comprise an annular drive member ?xed to the rotative soil cultivat ing disk means of the front frame, a rotative wheel having a spool means ?xed thereto, a line said crossed barsare connected with said beam, 10 having one end attached to said spool means and said beam being adjustable laterally of said front its other end attached to the rear frame, eccentric frame. means mounted on said wheel for moving said 7. The invention described in claim 2 wherein wheel into and out of driving engagement with said third mentioned means comprise a spool said annular drive member, and a brake means rotatably mounted on said front frame, a line 15 for said wheel mounted on said front frame above having one end attached to said spool and its said wheel to restrain the latter from rotation. other end attached to the rear frame, a friction drive ?xedly related to the rotative soil cultivat ERNEST S. ‘THOMPSON.