US1619862A - Cultivator - Google Patents

Description

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R. H. GRIFFITH CULTIVATOR Filed Watch 19, 1925 4 Sheets-Sheet 1 FIG. 1

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March .8 192'? 1,619,862

R. H. GRIFFITH CUL'EIVATOR Filed March 19, 1925 4 Sheets-Sheet 2 I A-r-rQ NEYg March 8 1927.

R. GRIFFITH QUL-TIVATOR Filed March 19, 1925 4 Sheets-Sheet 5 IN l/E' N TOR R/cHnRo H. iRlFFI m,

Arramvsva March 8 1927. 1,619,862

R. H. GRIFFITH.

CULTIVATOR F'i-led March 19, 1925 4 Sheets-Sheet 4 INVENTOR RICHARD H. GRIFFITH,

ATTORNEYS Patented Mar. 3, 1927.

Uhll'liElE- STATES ldiltgdtt P 'l 'FFICE.

RICHARD H. GRIFFITH, OF RICHMOND, INDIANA, ASSIGNQR TO THE OHIO GUL- TIVATOR COMPANY, OF BELLEVUE, 01-110, A CORPORATION OF OHIO.

OULTIVATGR.

Application filed March 19, 1925. Serial No. 16,?02.

This invention relates to cultivators designed to cultivate the soil in fields having growing crops of corn. V i

The first and major object of the invention is to so combine a seat frame with the cultivator beams thatavhen the beams are permitted by the driver to yield to the lifting action of certain springs, which adds material weight back of the axle, the seat frame will bodily move forward to transfer a part of its weight and that of the driver 'to points forward of the axle, whereby to counterbalance the weight added at the rear of the axle by reason ofthe elevation of the beams; and whereby also when the beams are placed by the driver in cultivating position, with their shovels in the ground sustaining their weight, thus lessening the weight on the machine at the rear ofthe aisle, the seat frame will then move rearwardy to restore the balance of the machine to what may be regarded as normal, 7

A further object in carrying out this gen- 5 eral combination is to connect the seat frame with the main frame by meansof swinging links, and to connect the rods by which the beams are suspended and lifted to some of such links, and to provide springs fixedly anchored at one end and connected at their other end to such links to act on the beams in a manner to draw upward on them as the scat frame is moved forward and to yield and allow the beams to descend as the seatframe is moved rearwardly.

A further object is to combine with one pair of the seat frame links a lever-like cross bar carrying a pivoted yoke to which the beam-supporting rods are attached in a yielding manner, so that as the beams are lifted by the rods the seat frame will be advanced forwardly; and vice versa, when the beams are lowered'the seat frame will be moved rearwardly.

And a still further object is to combine with the links, yoke and rods arranged as above stated, springs attached at one end to the general frame and at the other to extensions on the links so as to act in a direction to lift on the beams when they are to be elevated, and thereby to relieve the driver fromeXcessive labor in lifting the beams and forwardly advancing the seat frame.

To the above several objects may be addednumerous features of detail which will hereinafter appear in the body of the specification. i

In the accompanying drawings:

Figure 1 is a plan view of my cultivator as a whole. I v

Figure 2,is a perspective view thereof, looking from the rear toward'the front of the machine. I Y

Figure 3 is a side elevation of the machine with the seat frame in its forward position and the shovel beams in their elevated position, as when not in operation.

Figure 41- is a like view to Figure 3 but with the seat frame in its rear position and the beams in their lowered or operating position with the shovels acting in the ground.

Figure 5 is a detail view showing two of the seat frame links, the yoke supported thereby and beam lifting rods actuated by the yoke.

The numeral 1 indicates a pair of ground wheels mountedon the spindles that project from an arched axle 2. Secured to the axle is a general frame in the nature of a 0 draft frame comprising side bars secured at one end to the arched axle as by clips 4, with a cross bar 5, and at their forward ends to a draft pole 6 through a bolt 7. A cross bar 8 is secured to the side bars 3 of the draft frame and the pole is also attached to this cross barby means of a plate 9 through bolts 10, such plate being secured tothe cross bar 8 by other bolts 11'.

To this cross bar 8 are attached brackets 12 which in turn are connected with the arch through brace rods 13 and which carry a cross shaft 14; on which are mounted the couplings 15 in a manner to turn on the shaft when the beams are raised and lowered. The 95 beams are connected to these couplings. The beams may be of any conventional type but are preferably made each of a pair of bars 16 suitably braced together and both equipped with clamps 17 which carry conventional standards 18 to which the usual shovels are attached. The beams are further equipped with draft hooks 19 connected with draft links 20 to which is attached a drafttree 21. In this way the draft strains are applied to the arch through the links 13 and the con nections described and also applied directly to the beams through the hooks 19, links 20 and tree 21.

The features so far described are essentially conventional.

I will now refer to the features phich enter into this preferred form of construction by which my invention carried. into effect. These comprise the forward links 22 pivoted at 23 to the side bars 3 of the main or draft frame. These links have extensions 24 provided with a series of notches for connection with springs 25 whose other ends are anchored to the arch or main frame by projections 26 extending from the clips 4. The function of these springs is to aid in lifting the shovel beams by drawing rear wardly on the link extensions and forwardly on the other ends of the links 22 which has the effect of elevating the yoke 27 which is attached to a cross bar 28 that extends from one link 22 to the other. The yoke is pivoted at 29 and at its end is provided with openings through which extend beam rods 30 which at their lower ends are hooked to the beams and at their upper portions are equipped with adjustable collars 31, one collar above the yoke and one below on each rod. Coil springs encircle the rods, one spring .32 between the lower collar and the yoke and another spring 33 between the upper collar and the yoke, on each rod. The function of these springs is to permit the two rods to vieldingly slide through the openings in the yoke: and the particular function of the upper springs is to allow the rods to yield downward. when the beams are being depressed to working position and to react and lift on the rods when the beams are being elevated and thus aid in the effort of the driver to lift the beams.

The purpose in pivoting the yoke 27 to the cross bar 28 is to aid the driver-in letting one beam down further than the other if cultivating on an incline. as a hillside. And it'will be noted too that the cross bar 23. at the part where the yoke is pivoted thereto. is set considerably back or to one side of the pivots 23 of the links 22. which constitutes a sort of lever of this bar 28 which has the effect of tending to turn these links on their centers and to cause their extensions to create a tension on the beam-lifting springs 25, whereby these springs act through the links. the bar 28, yoke 27. and rods 30 to suspend the beams in what may be called a floating manner, as indicated in Figure Again, when the driver lifts on. the handles 34 to raise the beams these springs 25 through their contracting action materially aid in elevating the beams; or, indeed, pract-ically lift them if their tension is adjustedv high enough for that purpose, which may be done through the hooks 35 which connect the springs with the clips 4 and are adjustable through the nuts 36.-

It will now be seen that the bnnns are or may be suspended by the action of the springs 25 operated through the links 22 and the connection of the yoke therewith and of the beam rods 30, and that when the beams are depressed by the driver through the handles 34 and. the stirrups 37 (either or both), the springs 25 will expand and permit this action. and will lift more or less on the beams while the shovels are in the ground, leaving it to the option of the driver to depress the shovels more or less by the pressure he exerts on the beams through the stirrups. or if need be in particular cases, through the handles also.

Referring now to .the seat frame, it will be seen that it comprises side bars 38 which converge toward their rear ends to which the seatextensions 39 are secured by apivot bolt 40. A stop pin 41 may be adjusted into either of the holes 42 so as to adjust the forward end of the extension 89 up or down to lower or raise the seat 43. The seat and its extensions may be thrown forward past and above the frame bars 88 by turning the eXtension 39 on the bolt 40, a feature of convenience when the machine is to be stored in an implement shed when not in use or is to be shipped.

The forward ends of the seat bars 38 are turned upward to properly position them to be pivoted to the links 22 by clips or bolts 22. Further rearward the seat frame bars are provided with brackets 44 to connect the bars pivotally with the rear links 45 through pivot bolts 46. These links 45 are pivoted to the main frame or arch through a rock shaft 47 carried by bearings 48 extending from the clips 4. But any other form of pivotal connection between the general frame and these links may be used.

It will now be seen that the seat frame is pivotally supported on the mainor draft frame and is capable of being adjusted forwardly or rearwardly so as to increase the weight on the main frame forward of the axle and thereby decrease it at the rear thereof, or to increase it at the rear and thereby decrease the weightforward thereof. It will further be noted than by reason of the connections described between the beams and the seat frame, namely the forward links. the lever-like cross bar 28. the yoke 27 and the beam rods 80, the seat frame and beams move in unisonthe frame forwardly when the beams are raised and rearwardly when the beams are depressed, so that when the beams are in their highest or elevated position the seat frame is in its most for- Imogene ward Position, ancl when the ,beams'; are in their lowest or; cultivating position,- the seatframe 1 is in its: furthest rearward position.

In efl ecti ng these movements and changes of position the beam lif 'ng spriirgs-Qd'fiure tion in aid of elevating the beams and posi tionin'ggthe seat frame forwardly, yet permit the-reverse of these ITIOVGHIQIIi'S of the beams and seat' frame:- I

While I-prcf'er to connect-:the seati frantic to the general frame by means of'ithe swing= ing links deseribecbstill Ilwish to be under- StOOCthSIlOt limiting mysel-f to such a means of: connection: between. the two; frames so long as there; is. :preservedi such interconnew tion between: the seat. frame and the: beams as that when the driver causes orrpermits the beams to: raise, the seatframe will advance forwardly by reason of connectionsbetween it:andthebeams; andvice versa, when: the driven returns. thebeams to?" present the shovels; to. the ground he will thereby, through: theconnections between the beams and: therseatframe; cause the seat frame to assume its rcarwarctf position,

InmyrPatent No. 1,576,650; datedzMarch 16, 199-6, and in my later application, Serial No.. 13,717. filed March. 7, 13925,. I have shown and described seat frames adjustable forwardly to lift the beams and rearwardly to let the beams down, the seat frame itself being the part primarily actuated for that purpose by means of a lever operated to move the seat frame to its differentpositions and in doing so to raise and lower the beams, the seat frame itself being the manually operated element. But in the present case the beams are the elements which are operated and whose movements effect the movements of the seat frame. So that in the former applications the seat frame operated the beams, while in the present application the beams operate the seat frame. I regard myself to be the first to accomplish this latter operation with its resulting advantages and efliciency in the practical use of Cultivators.

In order to adjust the couplings 15 with their beams nearer to, or further from, each other I provide a lever 1 pivoted to a bracket 52" secured to the rod 14 and having links 3 which connect with the couplings 15 to so adjust them. A series of perforations l in the bracket are adapted to receive one end of one of the links 3 in order to lock the lever 1 in adjusted positions This is not a feature of the presentinven tion but is one I prefer to use.

Having thus fully described my invention,

what- I claim as new and desire to secure by Letters Patent, is:

1. In a cultivator, the-combination with a wheeled draft frame and shovel beams carried thereby and adapted to act as means for positioning the seat frame, of a seat frame,

and: connections between the sea-t frame and! connectionsincluding springs-which act in:

one direction to lift on" the bea-insiand' in the other -direction: to permit the beams tube lowered;

2. In cultivator, the combination with a wheeled draft frame and shovel beams car= ried thereby and adapted 'to actas means for positionin-gtheseat frame andfmeans wh-iclrthe beams may be elevated and lowered, of a seat frame; links which connect said frame to: the main: frame and permit' it to move forwardly and rearwardly, and" connections betweensome of the links and the beams whereby such" frame is advanced forwardly when thebeams are raised and rearwardly when the beamsare-lowered 3a In acu ltivato-r, the combination with a wheeled draft frame and shovel beams-car ried thereby and adapted to-act as n'ieans for positioning the seatfiame, of an seat frame, links which connect sa'eid frame to mainframe and permit it to be moved for ward ly and rearwardly, and coimections be tween some of the linksand" thebeams whereby such frame is advanced forwardly when the beams are raised, and rearwardly when the beams are lowered, and springs connected to the main frame and to such links and acting to exert an elevating force on the beams and at the same time a forward movement on the seat frame.

at. In a cultivator, the combination with a wheeled main frame and beams connected thereto, of a seat frame, links which connect the seat frame with the main frame, a leverlike member connected with the link struc: ture, and connections between such member and the beams, whereby when the beams are elevated the lever-like member is operated and the link structure is caused to move the seat frame forwardly.

5. In a cultivator, the combination with a wheeled main frame and beams connected thereto, of a seat frame, links which connect the seat frame with the main frame, a leverlike member connected with the link structure, connection between such member and the beams, and springs connected to the main frame and to the link structure and adapted to exert a lifting force on the beams, whereby when the beams are elevated the lever-like member is operated and the link structure is caused to move the seat frame forwardly.

6. In a cultivator, the combination with a wheeled main frame and beams connected thereto, of a seat frame, links which connect the seat frame with the main frame, a yoke having a lever-like connection with one pair of said links, andconnections between such yoke and the beams, whereby when the beams are elevated the yoke is actuated and such pair of links are operatedto cause the seat a frame to move forwardly.

V '7. In a cultivator, the combination with a wheeled main frame and cultivator beams carried thereby, and having handles, of a seat f'ame, links pivotally connecting the seat frame with the main frame, a leverdike member extending from two of the links, rods which connect with saidmember and with the beams, and springs which exert a lifting force on said pair of links and cause them, through their connections with the beams, to lift the beams and also cause them to advance the seat forwardly.

8. In a cultivator, the combination with a wheeled" main frame and beams carried thereby and having handles and stirrups, of a seat'frame having a seat at one end, links pivoted to the main frame and to the other end of the seat frame, one pair of such links having a lever-like member, a yoke pivoted to such member, rods yieldingly connected with said yoke and attached to the beams, and springs anchored to the main frame and connected with said lever-like member through said pair of links, whereby said lever-like member iscaused to lift on the beams through said connections and whereby said pair of links are ceased to then advance the seat frame forwardly.

9. In a cultivator, the combination with an arched wheeled frame, a cross shaft thereon, beams coupled to said shaft and adapted to be raised and lowered and having handles and stirrups, of a seat frame having a seat positioned near said handles, links pivoted to the main frame and to the seat frame, one pair of the links having a lever-like memher, a yoke pivoted thereto, rods slidably mounted in the yoke and attached to the beams, stops-on said rods and springs between the stops and the yoke, and lifting springs attached to the main frame and to extensions on said pair of, links, all for the purpose described.

10. In a cultivator, the combination with a main frame, of a pair of links pivoted to the frame and having portions which extend above and below the pivots, a lever-like cross-bar connected. torsaid links and extending rearwardly, and a yoke pivoted to the lever-like bar and adapted at its ends to be connected to beanrlifting rods. 7

In testimony whereof, I afiix my signature.

RICHARD H. GRIFFITH.

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