US1872236A - Power lift cultivator - Google Patents

Description

Aug. 16, 1932. 1-. BROWN rowan LIFT CULTIVATOR Filed July 31, 1926 4 Sheets-Sheet 1 RN km mu W v! Aug. 16, 1932. 'r. BROWN POWER LIFT GUL'I'IVATOR Filed July 31. 1926 4 Sheets-Sheet 2 Q a \k a Q m 1 Q Irufenfa 1 T1255 Q16 6, W

Aug. 16, 1932. 'r. BROWN roman LIFT cuL'rIvA'roR 4 Sheets-Sheet 3 Filed July 51, 1926 Aug. 16, 1932. 1-. BROWN rowan mm cun'rlvu'on Filed July 31,1926

4 Sheets-Sheet 4 ha kw:

M arm, a a

.45 after the rigs have 1 Patented Aug. 16, 1932 UNITED s'ra-Tss Pars-Nu our-ice manor-aims, snow, or nouns, rumors, assxenon worms a columnist,' or

MOLINE, ILLINOIS, A COB-POBATIOR 01' more , rowan nir'r common Application fled July 81, 1986. Serial Ila- 186,138.

M invention relates to cultivators, and hasparticularly. to do with the means for lifting the cultivator rigs out of operative position and for adjusting the depth of cultivation. The use of mechanical power for operating farm implements has made practicable the development of much larger implements than have been used where the farmer had to rely on manual effort to operate such machinery, and has resulted in considerable economy of operation,- since with a larger implement ordinarily a-much larger tract 0 land proportionately can be farmed than with a small implement. For example, a

is size that can be handled by horse power but by using mechanical power for prop on purposes a three-row-cultivator becomes entirely practicable. But the problem of gro- 20 pulsi on is not the only one that must be so ed where such largeimplements are used. In the use .of cultivators particularly it is necessary-at more or less frequent intervals to lift the cultivators out of operative position, and

23 also to adjust the several rigs'either simulta- Iieously or. so arately to operate at the same 1 or different epths, and itis extremely difficult, ifnot impossiblepfor a single operator to manually perform the various operations so necessary to the proper handling of cultivators of such lar 0 sizes. With these con siderations in min my present invention has for its object to provide for raising the several rigs of a cultivator,

simultaneously out a; of operative position, and restoring them to a predetermined operati e position, by mechanical power; and, in nneotion therewith, to provide mannally o rated means for adjusting-therigs to operate a the desired 40 depth. Also, as a further improvenient, my

invention has for its object to provide means a by which the several rigs maybe set inde pendently of eachother to opprate at the same or clifierent depths, of suc character that been set they may be two-row cultivator is about the maximum 1 Fig. 2, illustrating a. worm raised or lowered in their settin rther Object is to provi e certain 0t or improvements whic be particularly pointed out hereinafter. accomplish these objects as illustrated in the accobippan 'ng drawings and hereinafter deson at I regard as new is set forth in the claims.

In the accompanying drawings, in which I have shown myimprovements applied to a three-row cultivator arran d to be pro lled f by a tractor arranged bac of the cult vator frame, V

Fig. 1 is a side elevation;

Fig. 2 is a plan view;

Fig. 3 is a front elevation;

Fig. 4 is substantiallly a. vertical cross-section on line 4-4 of ig. 2 illustrating the frfigtl axle and the mounting of the steering W a n.

Fig. 5 is an enlarged lo tudinal vertical section, taken substantiall y on drive for the power operated nism; r

- Fig. 6 is a vievgfisimilar to Fig. 1, but with the propelling w eels omitted, show the ositionof the parts when the rigs have 'fted out of operative position; 7

Fig. 7 is a partial sectional view taken approximatel on the plane of the line 7?? o Fi re 8 owin emfployed lowerin o the rigs;

Fig. is a horizontal sectional view illustrating certain parts 'of the lifting mechamay a effect the raising and lifting and lowering mecha- .10

by fppwer without disturb one form of clutch that n' an li ig. 9 is across-section on line 9--9 of 8. v L eferring to the drawings, 10 indicates a. tractor, who

may be of any approved type, having apropelling wheels 11 and a. front truck a apted to rock about a longitudinal In the present embodiment of my invention the front truck carries dirigible wheels 12. The tractor illustrated is equipped with a chain drive for the prpipelling wheels, the chains being enclose in housings 13 shown in Fig. 1, but the driving mechanism for the propelling wheels may be of any preferred t pe.

The dirigible whee s 12 are carried at the opposite end portions of an "arched axle 14, which, as best shown in Figs. 1 and 3, is connected with the front portion of the main or tractor frame by a longitudinally y, disposed ivot 15 mounted in spaced blocks 16 depen ing from the front central portion of said frame, so that the front truck is adapted to rocl; relatively to the tractor frame about a longitudinal axis. As shown in Fig. 4, the end portions of the axle 14 are provided with bearings 17, 18 in which are ournaled circular standards 19, 20 having orizontally disposed wheel spindles 21, 22 at their lower ends on which the wheels 12 are mounted. The upper ends of the standards 19, 20 are respectwel rovided with forwardly extending para 1e arms 23, 24, which are cross connected by a connecting rod 25 so that the wheels 12 turn in unison for steering purposes. Preferably the stand: ards 19, 20 converge sli htly in an upward direction, as shown in l ig. 4. One of the standards 19 or 20, in the illustrated construction the standard 20, is provided near its ulpper end with a worm wheel 26 with whic meshes a worm 27 carried at the forward end of a longitudinally disposed shaft 28 at one side of the tractor frame. Said shaft is connected by a connecting rod 29 with a steering ost 30 that carries a steering wheel 31. a front and rear ends of the rod 29 are flexibl connected res ctively with the worm wheel shaft 28 and a; steer,- ing post 30 by universal joints 32, 33, as shown in Fi 2. Thus the steering connections may a a t themselves to any rocking movement of t e front axle.

posed transversely in front of the front truck is an attachment comprisin a cultivator frame that is firmly secure to the front axle 14 and is principally supported thereb so that said axle serves to connect it wi the main or tractor frame in such manner as to permit it to rock relatively thereto about a longitudinal axis, i. e. in a transverse vertical plane. Said cultivator frame preferably comprises two op ositely dis osed channel bars 34, spaced apart an rigidly connected together by up er and lower end plates 36 and upper and lower intermediate plates at, as best shown in Figs. 2 and 5. The intermediate portion of said cultivator frame is firmly secured to the end portions of the front axle 14 by braces 38 shown in Fi 1, so that said cultivator frame is supports independentl frame. Preferably the en portions of the axle 14 are connected with the tractor frame of the tractor by rearwardly extending braces 39 which are connected with said tractor frame at their rear ends, as shown at 40 in Fig. 1 preferably in line with the pivot 15, so that they do not interfere with the rocking movement of the axle.

Mounted on the front ortion of the cultivator frame and extending longitudinally thereof is a bar 41 from which depend a series of hangers 42 which form means of attachment for the front ends of a series of.

sleeves are pivotally connected a series ofcultivator beams 45 by means of pivots 46. As best shown in Fig. 2, the beams 45 are rovided with straps 47, which, with the orward ends of the beams, form yokes to support the pivots 46, so that the beams 45 have pivotal support at laterally separated points. It will be understood that the several hangers 42 are spaced a suitable distance apart along the bar 41 and are secured in position thereon in any suitable way, preferably gby means designed to permit their adjustment along said rod to regulate the spacing between the several cultivator rigs. The cultivator beams 45 carr shovels 48 arranged in the usual way. B the arrangement described the cultivator earns are held against lateral swinging, but are free to swing upward and downward about the pivots 46 at their forward ends, to-raise or lower the shovels with respect to the ground. In the arrangement shown there are six rigs arranged to cultivate three rows at one time, but in invention contemplates modification of sucli arrangement as may be desired. The hangers 42 are held against fore and aft swinging by braces 49 secured to their lower ends, and also suitably attached to the on]- tivator frame as best shown in Fi s. 1 and 6.

In the machine which forms the subjectmatter of this application the several cultivator ri s may raised or lowered independent y of each other b manually operable means; they may be raised or lowered in.

unison, also by manually operable means, and they may be raised or lowered in unison by power operated means, the ower being derived from the motor b Wl'llCll the tractor is driven, althou h my invention contemplates the use of ot er power for that purpose, such as that derived from a separate motor. The manual adjustments referred to are designed primarily for setting the rigs to operate at a greater or less depth, but 1f desired they may be used to raise the shovels clear of the ground. The power operated means for raisin or lowering the rigs is so designed that it 5 oes not alter the setting of vertically, by re erence to Figs. 1, 2 and3, 1t 7 will be seen that a lifting device comprising a rock shaft 50 is mounted upon and extends longitudinally of the cultivator frame from one end thereof to the 'other. Such shaft is preferably located over the front portion of said frame and is mounted inbearings carried by suitable brackets 51 secured upon the front beam 34 of the frame at suitable intervals. Said shaft is held against endwise movement by any suitable means, and as'it is carried by the cultivatorfraine, it swings vertically in unison with such frame. This shaft is provided. at points above the several cultivator beams with crank arms 52 fixedly secured thereto so as to rock therewith, and

forked at their rear ends to receive pivot pins or trunnions 53 which connect them with lifting devices in the form of rods 54, best shown in Figs. 1 and 6. The trunnions 53 are carried y mounted intermediately upon therods 54 and abut at their upper ends against shoulders 56 on saidrods. Said sleeves hear at their lower ends on collars 57 loosely nfounted on the rods 54. By this construction the rods 54 are free to rotate for adjustment purposes, as will hereinafter appear. At their lower ends the rhds 54 are "provided with screwthreads which screw into blocks 58 pivotally supported by trunnions 59 mounted in bearings in the beams and in straps 60 secured to the beams, as best'shown in Fig. 2. At their upper endsthe rods 54 are provided with cranks 61, as best shown in Figs. 1 and 6. Assuming that the rock shaft 50 is held 'againstrocklng, it will be apparent that'by rotating any one of the rods 54 by means of its crank the cultivator beam attached to it may be raised or lowered bythe screwing of its lower end into orout of the bloclr 58.

By this means, therefore, any of the cultivator beams, may be manually adjusted vertically independeptly of the others and of the rockof the rocklshaft 50 to'set it for cultivating at any desired depth, or to lift it clear of the ground. Also, by means of therock shaft 50, the several lifting devices may be actuated in unison to raise or lower the several beams at the same time,as will be hereinaffter' 'described. Preferably each of the" 54' is provided with a spring 62 mounted erable sleeves that are loosely upon it between the collar 57 and a collar 63 a justably mounted on said rod and held in lace by a set screw 64, as shown in'Fig. 1. hese springs serve to yieldin ly hold the cultivator shovels in the groun and p'ermi them to rise when an obstacle is encountered, It will be noted that two of the cranks 61 are shown as extending higher than the rest,

but this is simply to permit them to turn freely without striking certain other parts of the mechanism which have not yet been described.

For lifting and lowering the several cultivators manually in unison I provide the rock shaft 50 with an upwardly extending arm 65 which is non-rotatably secured thereto and is rovided .at its upper end with a trunnion. lock 66 having internal screw threads, said block beingsimilar in construction to the blocks 58. Screwed into the block 66 is the forward end of a rod67 which extends rearwardly at oneside of the tractor frame and at its rear end is provided with a universal joint 68 by which it is flexibly connected to a telescopic connecting rod 69 com rising a tubular member 70 in which is -,fitte an extensible member 71 having at its rear end a universal joint 72. The latter universal joint connects the member 71' with the forward end of a rod 73 which is mounted on the frame of the tractor and is provided at its rear end with a crank 74. :Said rod is rotatably supported on the tractor frame,

preferably by means pf brackets 75, 76, as

of any rocking movement in a transverse vertical plane of the front aide and cultivator frame. The extensible members 70, 71 permit the arm 65 to swing back and forth independently of the rod 78. Whenthe shaft 50 is rocked, since all the cultivator rigs are connected with it through the cranks 52 and rods 54, they will all be raised or lowered in unison, unless at the same time one or another of the rods 54-berotated separately, which would change the relation of the rig connected with it with respect the other gs. To aid in lifting the several rigs in unison I provide springs 77 at the ends of the cultivator frame, which at their front ends are connected to arms 7 8 secured to the rock shaft 50, and at their rear ends are connected by adjustable links 79 with brackets 80 secured 'to the tractor frame, as best shownin Figs.

1 and 2.

Coming now to' the power lift mechanism for raising or lowering the rigs in unison, it is of the unidirectional, optionally controlled type, and comprises a rotary shaft 81 that extends transversely of the machine, preferably over the central portion of the cultivator frame, and is provided with a swinging member in the form of a crank 82 at the end adjacent to the rod 67, as best shown in Figs. 2 and 8. Said crank is connected with said rod/by a pivot pin 83 fitted in a bearin 84 carried by a sleeve 85 through which t e rod 67 extends. Said rod is journaled in said sleeve but is held against endwise movement through it, so that when the clutch mechanism with which said sleeve is connectcd,,as hereinafter described, is idle, said sleeve holds the rod 67 against endwise movement but does not interfere with its rotation by operation of the crank 74 to manually actuate the'rock shaft 50 for raising or lowering'the rigs. In' the latter operation the sleeve 85 is held stationary by the crank 82 and serves as an abutment that resists the end thrust in ither direction of the rod 67, as best shown in Figs. 1 and 8. By this construction rotation ofthe crank 82 will move the rod 67 endwise and rock the rock shaft 50 to raise or lower the rigs in unison. The range of movement of the lifting devices effected by the crank may be varied by screwing rod 67 in one direction or the other through the trunnion block 66, to change the normal position of the arm 65.

The end of the'shaft 81 that carries the crank 82 is mounted in a.bearin 86 supported upon the cultivaton frame v standards 87, shown in Fig. 1. The opposite end portion of said shaft is journaled in a tubular shaft 88 that is disposed transversely of the machine, and at its outer end is mounted in a bearing 89, preferably integral with the housing member 90, and adapted to receive a worm wheel 91, as shown in Fig. 8. A cooperating housing member 92, mounted on the tubular shaft 88 and connected with the housing member 90, encloses said worm wheel at the opposite side, as shown in the latter figure. Said housing is braced by a brace 93 connected to it and to the cultivator frame, as best shown in Fig. 5. The worm wheel 91 is keyed to the tubular shaft 88 and operates to rotate said shaft. Said worm wheel is driven by a worm 94 carried by. shaft 95 that extends fore and aft, and is flexibly connected by a universal joint 96 with the front member 97 of an extensible cou ling rod comprising said front member 9 and a rear member 98 telescopically and non-rotatably connected therewith, preferably by making said rod non-circular in crosssection. The rear member 98 of said connecting rod is connected by a universal joint 99 with a. power takeoff or drive shaft 100 which at its rear end carries a spiral gear 102 meshing with described in detail.

a spiral gear 101 driven by the motor on the tractor frame. In the construction illustrated said motor drives a transversely disposed shaft 103 shown in Fig. 1, and the spira gear 101 is mounted on and keyed to said'shaft, but any other suitable arrangement for the pur ose may be em loyed. The shaft 103 pre erably carries a y wheel 104 at one end, and a belt ulley 105 at the other, as shown in Fig. 2. y this construction the worm 91 on the tubular shaft 88 is constantly rotated while the motor is running, and, therefore, said tubular shaft is also driven constantly.

At its inner end the tubular shaft 88 is provided with a clutch member 106, preferably formed integral therewith, which has a marginal flange 107 provided with notches 108. Co-acting with the clutch member 106- is a second clutch-member 109 which carries means for operatively .connecting the two clutch members so that they rotate in unison, comprising a roller 110 movable into or out of engagement with the notches 108 bythe operation of either of two triggers 111, 112 arranged at diametrically opposite points. A spring 113 tends to move the roller 110 into engagement with the notches 108. The clutch member 109 is provided with a rim 113 having a radial flange 114 in which are notches 115, 116 at diametrically opposite points, and as best shown in Fig. 7 the triggers 111, 112 project out beyond the rim 113 at one side of the notches 115, 116, respectively. This type of clutch is well known in the art as it is commonly used on ower lift plows of the frameless type, and its construction and operation therefore need not be It will suffice to say that the clutch-members are connected by the action of the spring 113, and are disconnected automatically at the end of every half revolution of the clutch by means operating to press back one or the other of the triggers 111, 112, and hold. it in that position. The rotation of the clutch member 109 accordingly stops until such latch is again released. The means for disengaging the clutch members comprises a trip lever 117 pivoted at. its lower end upon the cultivator frame by a pivot 118 shown in Figs. 1 and 6, and carrying a roller 119 arranged to ride on the flange 114 as the clutch rotates and adapted to engage one or the other of the trig- EBIS 111, 112 as such trigger is carried around ythe rotation of the clutch, thereby actuating the tri ger to disconnect the clutch members. The trip lever 117 is normally held in 0 erative position by a spring 120 connecte at one end with said lever and at the other end with the standard 107, as shown in Figs. 1 and 6, but the lever 117 may be moved forward to carry its roller 119 out of engagement with the clutch trigger with which it is in engagement by a rod 121 connected at its forward end with the upper end of said trip lever and extending back to a position where it may be l is.

, cycle of operation one hundred and eight ment of the crank wi the spring ,assuming the parts -to be in the conveniently operatedby the person occupying thedrivers seat 122. The rod 121 is preferably supported and guided b the-bracket; 76, as shown in, Fi 1. be evident from the foregoing t at by means of the operating rod 121 the driver may optionally connect the clutch member 109 with the clutch member 106 so that it will rotatein unison therewith, and that after being so connected if the operator releases the operating, rod 120 will return the trip lever 117 to its operative position so that the roller 119 will disconnect said clutch members as soon as the tubular shaft 88 has made a half revolution. Upon the next actuation of the trip; lever the clutch member 109 will o erate' through the second half of the cycle an then stop. This 0 eration may be repeated as of t'en as desire It will thus be seen that this motor driven power lift clutch has a definite for'raising and lowering e rigs. The clutch member 109 is non-rotatably connected with the shaft 81 by a key 123,- or in any other suitable way, so thht the rotary movement of said clutch member is imparted to said shaft. It will be clear, therefore, that osition shown in Fig. 1, if the trip lever 11 beactuated 'the clutch will rotate through a half cycle, thereby similaigly rotating the shaft 81 and swinging its era 82 through an arc of degrees. This movemove the rod 67 forward to the position shown in Fi 6, thereby rocking the rock shaft and ii ing all the cultivator rigs in unison, as shown in said figure. This movement of the rod 67 is permitted by the telescopic connection 70, 71, which.

is then extended as shown in Fig. 6, but without interfering with the operatlve connection between said members.

The crank 74, therefore, remains operative to modify the range'off movement of the lifting devices under the action of the ower lift mechanism even while'the rigs are ing raised or lowered by the giwerliftmechanism. After the ri have en-raised to'the osition shown in ig. 6 they will be held in their raised position b the action of the trip lever 113, which, as as been explained,

, operative position is'rnoved rearwardly by the actionof the sprin 120 as soon. as the rod 121 is release by the operator. To lower the rigs the operator again thrusts the rod 121 forward to move the trip lever 117 out of its whereupon the clutch completes the cycle, thereby swinging the crank 82 downward] and rearward y to the position shown in Fig. 1, where it is-stoplpe'd ythe disconnection of the clutch mem rs. Thus the rock shaft 50 is rocked in the opposite direction, lower-in the rigs.

As has been explains the several rigs may be individually adjusted vertically to set them for operating at any desired depth by means of the cranks 61, which adjustment is wholly independent of the o eration of the ower 11ft mechanism, or of t e manual adustment of the rigs in unison effected by the crank 74. Therefore, the rigs may be set to operate at any desired depth, and such settin liflgd in unison either by the operation of the'manual lifting devices or by the opera- ,tion of the power lift mechanism, so that when the rigs are lowered by either of the latter mechanisms they will maintain the same relative position that was established by the operation of the individual adjusting cranks 61.

' So far as I am aware the means above described for raising and lowering cultivator rig's,-or analogous tilling devices, mg. fortheiradjustment, is broadly new, and the claims hereinafter made are, therefore, to be construed accordingly. The term attach- -ment as used in the claims is not to be considered as necessarily meaning that the cultivator or other implement sup orting frame is one that must be capable 0 being applied to or removed from a conventional tractor without special arrangement for its recep tion, or one that ma readily be removed from the tractor, as it may either be ermanently ailixed thereto, or be made readily separable therefrom, as circumstances may 'ctate. Q

.What I claim as my'invention and desire to secure by LettersPatent, is

1. In an agricultural implement, the combination with. a tractor including a motor, of an attachment comprising a frame connected with the tractor to rock with res t-thereto in a transverse vertical plane, so tilling rigs connected with said frame to swing toward or from the ground, and lifting devices mounted on said frame to swing therewith and operable to lift therigs in unison, said lifting devices including connections for ac- .tuatin throng a substantially definite cycle of operation, said connections being adjustable manually to vary the upper and lower limits of the liftin movement of the ri 2. ii an a cultural im fiment, the combination wit a tractor inc uding a motor, of an attachment comprising a frame connected with the tractor to rock ith respect thereto in a transverse vertica plane, soil tilling rigs connected with said frame to swing toward or from the (groundyand lifting devices mounted on sai frame to swing therewith and operable to lift the rigs in unison, said lifting devices including connections for actuating the same by power from said motor through a power lifter having a definite cycle of operation, said connections the same by power from said motor a motor driven power lifter having and providll then bein adjustable manually to vary the upper and ower limits of the hfting movement of the ri and means operable manually to ada just t e rigs vertically independently of 6 each other.

3. In an agricultural im lement, the combination with a tractor inc uding a motor, of an attachment comprising a frame connected with the tractor and extending transversely 10 thereof, soil tilling rigs connected with said frame to swing toward or from the ground, and lifting means operable to lift the rigs in unison, said liftin means including a motor operated power ifter on the attachment frame, said lifter having a substantially definite cycle of operation, 0 crating connections between said lifter an the rigs, and means operable manually to adjust such connections to vary the operating position of 80 the ri 4. li an agricultural implement, the com- "bination with a tractor including a motor, of an attachment comprising a frame connected with the tractor and extending transversely thereof, soil tilling rigs connected with said frame to swing toward or from the ound, and lifting means operable to lift t e rigs in unison, said liftin means including a motor operated power ifter on the attachment 80 frame, said lifter having a substantially definite cycle of" operation, operating connections between said lifter and the rigs, and means operable manually to adjust such conh nections to vary the operating position of and means operable manually to adt e rigs vertically independently of each 0 er.

5. In an agricultural implement, the combination with a tractor including a motor of 40 an attachment comprising a frame rockably connected with the tractor to extend transversely thereof, soil tilling rigs connected with said frame to swing toward or from the 7 ground, and lifting means 0 erable to lift the Al! rigs including connections or actuating the same by power from said motor, said connections comprising co-acting clutch members mounted on said frame, means for continuousl driving one of said clutch members from said, motor, means connected with the other clutch member for lifting or lowering the rigs, the latter means comprisin a connection adjustable manually to vary t e 0 erating position of the rigs, means operab e to 58 optionally connect said clutch members, and means for disconnecting said clutch members at the end of each lifting or lowering operation thereof.

6. In an agricultural implement, the combination with a tractor including a motor, of an attachment comprisin a frame connected with the tractor to exten transversely thereof and to rock with respect thereto in a vertical plane, soil tilling rigs connected with said frame to swing towar or from the ground,

and lifting means operable to lift the rigs including connections for actuating the same by power from said motor, said connections comprising co-axial clutch members on said frame means for continuously driving one of said clutch members from said motor, means connected with the other clutch member for lifting or lowering the ri s, means operable to optionally connect sai clutch members, means for disconnecting said clutch members at the end of each lifting or lowering operation thereof, and means operable manually to move the rigs vertically in their entireties to vary one of the limits of the movement thereof effected by the operation of the clutch members.

7; In an agricultural implement, the combination with a tractor including a motor, of an attachment comprising a frame pivotally connected with the tractor to extend transversely thereof and to tilt with respect there to in a transverse lane, soil tilling rigs connected with said rame to swing toward or from the ground, and lifting means operable to lift the rigs including connections for actuating the same by power from said motor, said connections comprising co-acting clutch members on said frame, means for continuously driving one of said clutch members from said motor, means connected with the other clutch member for lifting or lowering the rigs, means operable to optionally connect said clutch members, and means for disconnecting said clutch members at the end of each lifting or lowering operation thereof, and means operable manually to set the operating position of said rigs independently of each other.

8. an agricultural implement, the combination with a tractor including a motor, of an attachment comprising a frame connected with the tractor to rock with respect thereto, soil tilling ri connected with said frame to swing towar or from the ground, and liftingmeans operable to lift the rigs in unison includi co-acting clutch members mounted on said rame, means for continuously driving one of said clutch members from said motor, means operable by the other clutch member tolift or lower the rigs, means optionally operable to operatively connect said clutch members, and means for disconnecting said clutch members at the end of each lifting or lowering operation thereof.

9. In an agricultural implement, the combination with a tractor including a motor, of an attachment comprising a frame connected with the tractor to rock with respect thereto, soil tilling ri 5 connected with said frame to swing towar or from the round, and lifting means operable to lift t e rigs in unison including co-acting clutch members mounted on said framei means for continuously driving one of sai clutch members from said motor, means operable by the other clutch memnected with the tractor nevaeae her to lift or lower the rigs, means optionally operable to opcratively connect said clutc members, means for disconnecting said clutch members at the end of each lifting or lowering operation thereof, and means operable manually to vary the upper and lower limits of theflifting movement of said rigs effected by the clutch members.

10. In an agricultural implement, the combination with a tractor including a motor, of an attachment comprising a frame conto rock with respect; thereto, soil tilling rigs connected with said frame to swing toward or and lifting means operable to lift the rigs in unison including co-acting clutchmembers mounte on said frame, means forcontinuous- 1y driving one of said clutch members from said motor, means operable by the other clutch member to lift or lower the rigs, means optionally operable to operatively connect said clutch members, and means for disconnecting said clutch members at the end of each lifting or-lowering operation thereof, and means onsaid frafne operable manually to set the operating position of the ri s independently of each other.

, 11. u an agricultural implement, the combination with a tractor including a motor, of an attachment comprising a frame connected with the tractor to rock with respect thereto, soil tilling riigs connected-with said frame to swing towar or from the ground, and lifting means operable to lift the rigs in unison including co-actin clutch members mounted on said frame, exible means for continuously driving one of said clutch members from said motor, means operable by the other clutch member to lift or lower the rigs, means optionally operable to operatively connect said clutch members, and means for disconnecting said clutch members at the end of each lifting or lowering operation thereof.

tially definite cycle of operation connected with said frame to swing 12. In an agricultural implement, the combination with a tractor including a motor, of an attachment comprising a frame connected with the tractor to rock with respect thereto, soil tilling rigs connected with said frame to swing toward or from the ground, and lifting means operable to lift the rigs, comprising connections for actuating the same by power from said motor, including a power lifter on said said connectlons being adjustable manually to vary one of the limits of the power actuated movement of the rigs.

13. In an agricultural implement, the combination with a tractor including a motor, of an attachment comprising a frame connected with the'tractor to rock with res ect thereto in a transverse vertical plane, soi tilling rigs toward ground, and lifting devices herewith or from the mounted on said frame to swing from the ground,

nite cycle of operation,

motor actuated frame having asubstan- Y of an attachment comprising a the rigs in unison, said rising connections for actuating the same y ower from said mo tor, includin a motor riven power lifter on said frame aving a substantially definite cycle'of operation, said connections being ad-. justable manually to vary one of the limits of the swinging movementof the rigs.

14. In an agricultural implement, the combination with a tractor including a motor, of an attachment comprising a frame connected with the tractor to. rock with respect thereto in a transverse vertical plane, soil tilling rigs connected with said frame to swing toward or frbm'the round, and lifting devices operable to lift t e rigs in unison, said lifting devices comprising connections for actuating the same by power from said motor including a power lifter on said frame having a defisaid connections being adjustable manually tovary the lower limit of the swinging movement of the ri s, and means operable manually to adjust t e rigs vertically independently of each other.

15. Inan agricultural implement, the combination with atractorincluding a motor,of an attachmentcomprising a frame connected with the tractor to swing with respect thereto and extendin transversely thereof, a rock shaft carried y said frame, soil tilling rigs connected with said rock shaft to swin toward or from the ground by the me 'ng thereof, and lifting means operable to rock said shaft to lift the rigs, comprising an arm on said rock shaft, a power lifter on said frame having a definite cycle of operation, means for actuating said power lifter from said motor, an operating connection between said power lifter and said arm, for rocking said shaft, and means operable to adjust sai operating connection to vary the operating position .of the ,rigs.

16. In an agricultural implement, the combination with a tractor including a motor, of an attachment comprisin with the tractor to swing in a transverse tical plane, a rock shaft on saidframe, tilling rigs connected with said. rock shaft to swing toward or from the ground by the rocking thereof, and lifting means on sa1d and operable to lift lifting devices com a frame connects ver frame operable to rock said shaft to lift the rigs, com rising an arm on said rock shaft, 9. power 1i t clutch operation, said clutch including ashaft hav ing a crank, means for operatin said clutch from said'motor, and a rod and s eeve connection between said crank and said arm, said connection being adjustable to vary the operating osition of the rigs. r

17. n an agricultural implement, the combination with a tractor including a motor,

rame connected with the tractor to swing in a transtion between said crank and said arm, said frame S011 tilting rigs connected with said having a definite cycle of rock shaft to swing toward or from the ground by the rocking thereof, and lifting means on said frame operable to rock sai shaft to lift the rigs, comprising an arm on said rock shaft, a power lift clutch havin a definite cycle of operation, said clutch including a shaft having a crank, means for operating said clutch from said motor, and a connection between said crank and said arm for rocking said rock shaft by rotation of said crank, said connection being adjustable to vary the normal osition of said arm with respect to said cranli.

18. In an agricultural implement, the combination with a tractor including a motor, of an attachment comprising a draft frame pivotally connected with the tractor to rock with respect thereto in a transverse vertical plane, soil tilling rigs connected with said frame to swing toward or from the ground, lifting means on said frame operable to lift the rigs,

power lift mechanism actuated by power from said motor, an operating connection between said power lift mechanism and said liftin means for actuating the same by power, an means operable manually to move said connection either independently of the operation of said power lift mechanism, or in conjunction with the operation thereof, to actuate said lifting means.

19. In an agricultural implement, the combination with a tractor including a motor, of an attachment comprising a draft member pivotally mounted on the tractor to swing in a transverse vertical plane, and extending transversely thereof, a plurality of soil tilling rigs connected with said draft member to swing toward or from the ground independently of each other, lifting means on said draft member operable to lift the rigs in unison, and means for operating said lifting means including ower lift mechanism actuated by power fi'om said motor, and connections between said power lift mechanism and said lifting means adjustable to simultaneously vary the operating position of the 11 s.

2 0. In an agricultural implement, the combination with a tractor including a motor, of an attachment comprising a draft member pivotally connected with the tractor to rock with respect thereto in a transverse vertical plane, soil tilling rigs connected with said draft member to swing toward or from the operable to lift the rigs, and means for op erating said lifting means including power lift mechanism having a substantially definite 5 cycle of operation, actuated by power from said motor, and connections betweensaid power lift mechanism and said lifting means, including means for adjusting said connections to vary the operating position of the rigs.

ground, lifting means on said draft member.

21. The combination with a tractor including a. motor, of a frame comprising a draft member extending laterally from the tractor, and rigs supported therefrom for independent vertical movement, whereby said rigs may accommodate themselves to unevenness of the ground surface, power lift mechanism actuated by the tractor motor, and lifting means connected with the rigs and operable either by said power lift mechanism, or manually, or by both conjointly.

22. The combination with a tractor ineluding a motor, of a frame comprising a draft member extending laterally from the tractor, and rigs supported therefrom for independent vertical movement, whereby said rigs may accommodate themselves to unevenness of the ground surface, power lift mechanism actuated by the tractor motor, lifting means connected with the rigs for lifting them either separately or in unison, and power transmitting connections between said ower lift mechanism and said lifting means or ac tuating said liftin means to move the rigs in unison, and sai lifting means being operablemanually either separately from or conjointly with the operation thereof by said power lift mechanism.

23. The combination with a tractor includ-' ing a motor, traction wheels driven by said motor, a power take ofi' shaft on the tractor, and driving connections between the motor and said shaft, of lifting mechanism for an implement associated with the tractor to be propelled thereby, comprising half revolution clutch mechanism including a normally rotating clutch member, a normally stationary clutch member having a crank, and means for optionally connecting said clutch members to rotate in unison, a worm and worm wheel connection between said power take-off shaft and said normally rotating clutch member, a rock shaft, a lifting connection between said rock shaft and the implement, operable manually to lift the implement'independently of the rocking of said rock shaft, and also operable by the rocking of said rock shaft, and a power transmittin connection between said crank and said roc: shaft for rocking the same to lift or lower the implement by rotation of said normally stationary clutch mem- 24. The combination with a. tractor including a motor, a power take-off shaft extending longitudinally of the tractor, and driving connections between the motor and said shaft, of lifting mechanism for an implement associated with the tractor to be propelled thereby, comprising half revolution clutch mechanism including a normally rotating clutch member, a normally stationary clutch member, and means for optionally connecting said members to rotate in unison, a worm and worm wheel for driving said normally rotating clutch member from said powertakeofi shaft a transverse shaft connected to rotate with said normally stationary clutch member, a crank on said transverse shaft and lifting connection between the rock shaft and the implemen operable manually to lift the implement in ependently of the rocking of said rock shaft, and also operable by the 10 rocking of said rock connection between said crank rockshaftforrockingthesametoliftor lower the implement by the rotation of said transverse ft.

- THEOPHILUS BROWN.

shaft, and an operatan said.

CERTIFICATE OF CORRECTION.

Patent No. 1,872,236; August 16, 1932.

THEOPHILUS BROWN.

It is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as follows; Page 7, line 12), claim 17, strike out the syllable, words "and comma "tion between said crank and said am," and insert instead verse vertical plane, a rock shaft on; and in line l30, aiter "lrame" insert a comma; and that the said Letters Patent should be read with these corrections therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 1st day of November, A. D. 1932.

M. J. Moore,

- (Seal) Acting Commissioner of Patents.

ofi shaft a transverse shaft connected to rotate with said normally stationary clutch member, a crank driven thereby for swinging movement in a on said transverse shaft and I snbstant'ally vertical plahe, a rock shaft, a

lifting connection between the rock shaft and the implemen operable manually to lift the implement in ependently of the rocking of said rock shaft, and also operable by the 10 rocking of said connection between said crank rockshaftforrockingthesametoliftor lower the implement by the rotation of said transverse ft.

- THEOPHILUS BROWN.

rock shaft, and an operatan said.

CERTIFICATE OF CORRECTION.

Patent No. 1,872,236; August 16, 1932.

THEOPHILUS BROWN.

It is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as follows; Page 7, line 12), claim 17, strike out the syllable, words "and comma "tion between said crank and said am," and insert instead verse vertical plane, a rock shaft on; and in line l30, aiter "lrame" insert a comma; and that the said Letters Patent should be read with these corrections therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 1st day of November, A. D. 1932.

M. J. Moore,

- (Seal) Acting Commissioner of Patents.

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