US2345702A - Cultivator - Google Patents

Description

April 4, 1944. c, s NOBLE 2,345,702

CULTIVATOR Filed Oct. 10, 1940 2 Sheets-Sheet 1 n", fl: 9 m (Anya.

April 4, 1944. c. s. NOBLE CULTIVATOR Filed Oct. 10, 1940 2 Sheets-Sheet 2 dog/ k012i C. 15. Noble.

Patented Apr. 4, 1944 UNITED STATES PATENT OFFICE CULTIVATOR Charles Sherwood Noble, Nobleford, Alberta, Canada Application October 10, 1940, Serial No. 360,687

3 Claims.

My invention relates to improvements in cultivators of the type wherein an elongated blade is drawn through the ground slightly below the surface thereof for the purpose of severing weed roots from the plants thereof, in contrast to the type of cultivator which turns the soil over and buries the weed, an object of this invention being to provide a device of the character herewithin described embodying a novel hanger, blade and carrier construction together with means for adjusting the spacing of the hangers and for adjusting the inclination thereof when the cultivating blade becomes worn.

With the above more important object in view and such other minor objects as may appear as the specification proceeds, my invention consists essentially in the arrangement and construction of parts all as hereinafter more particularly described, reference being had to the accompanying drawings, in which:

Figure 1 is a side elevation of my cultivator.

Figure 2 i a plan view of my cultivator.

Figure 3 is a perspective detail illustrating the means whereby the spacing of my hangers may be adjusted.

Figure 4 is a perspective detail illustrating the means by which the vertical inclination of my hangers may be adjusted and set.

Figure 5 is a perspective detail illustrating the means by which my spaced spring teeth may be adjusted as to proximityand brought into alignment with the hangers when same is altered.

Figure 6 is a section of Figure 3.

the spacing of the on the plane S66-6 Figure '7 is a cross-section illustrating my cultivating blade and carrier therefor.

In the drawings like characters of reference indicate corresponding parts in the different figures.

By reference to the accompanying Figures 1 and 2, it will be seen that my cultivator comprises a superstructure I mounted upon a pair of ground wheels 2, this superstructure comprising a framework formed of the converging channels 3, which extend forwardly of the rectangularly arranged channels 4 and 5, and the opposing side pair 6. The framework is further strengthened by the bracing diagonals 1. Double angulated axles ii are provided and upon the outwardly projecting portions 9 thereof the Wheels 2 are journalled, the horizontal, inwardly projecting extensions of these axles passing through apertures in the members 6 and terminating in bearings i6 secured to the under side of the diagonals 7.

A pair of levers H is also provided for raising or lowering the superstructure I from either side thereof, these levers being fulcrumed at the point l2 and being provided upon the ends of the cranked portions i3 thereof with a roller i 4 designed to ride against the vertically rotatable portion IS.

A notched quadrant I 6 is provided together with conventional pawls (not shown), which latter of course, are located upon the inner side of the levers H for engagement with the notches and finally in this connection a pair of upwardly projecting arms I! are keyed to the portions 8 of the axles, balancing springs it being anchored at their ends to the arms and to the superstructure at the points l9 respectively to ease the settlement of the superstructure when being lowered.

The essential novelty of my cultivator resides in what follows hereinafter.

The blade and carrier best illustrated in the accompanying Figure 7, and collectively enumerated IS in the accompanying Figures 1 and 2 (and of which I provide two or more, spaced as illustrated in Figure 2), are secured to the lower ends of a pair of hangers 26, these hangers being formed of downwardly depending plates mounted edgewise upon the cultivator with respect to the direction of travel thereof, which is in the direc tion of the arrows 2!. It will accordingly be seen that while a relatively deep section is presented by the hangers in the direction of travel thereof, these members are of inconsiderable thickness in a plane transverse to their direction of travel.

By reference particularly to the accompanying Figure 3, it will be seen that my hangers are mounted upon the horizontal bars 22, the front ends of which are provided with apertures 23, through which the portions 8 of the aXles may extend and yet still be free to rotate. The rear ends of the members 22 terminate in the plates 24, which are bolted to similar plates 25, these plates together with the associated bolts constituting slidable clamping assemblies 26, which may be tightened on the channel 5 or slacked off when it is desirable to move the hangers transversely.

It will be seen by reference to the accompanying Figure '3 that the hangers themselves are pivotally mounted upon the bars 22 at the point 27, a segmental slot 28 being provided in the upper rear corners of the hangers to receive the studs 29, which also extend through the bars 22.

By reference particularly to the accompanying Figure 4, it will be seen that a portion of the bars 22 are inwardly angulated as at 30 to act 2 as bearings for the ends of the vertically positioned adjusting bolts 3!, which extend through inwardly and horizontally projecting brackets 32, having screw-threaded apertures formed therein for the reception of the bolts 3|. By this arrangement, it will clearly be seen that I have provided means for adjusting the vertical inclination of the hangers in a positive manner such that they cannot be rotated counterclockwise with respect to the accompanying Figure 1 for example, while the cultivator is being pulled forwardly.

In the accompanying Figure 6 I have 1111159,

trated the manner in which the leading edge 33 of the hangers is expanded and rounded, by'this arrangement being less liable to accumulate entanglements of trash. From the figure in question it will be seen that the expansion of the leading edges is obtained by the use of lengths of longitudinally cut pipe 34, which are filled in upon the concave sides thereof by flowing welded metal 35 thereinto so as to build up the section to the desired contour.

In the accompanying Figure I have illustrated particularly one of my pair of spring teeth 36, these being mounted upon a transverse and longitudinally slotted bar 31 secured to a pair of downwardly extending brackets 38, bolted adjacent the junction of the members 3 and 6.

It will be seen that a pair of guides 39 spaced apart to an extent equal to the width of the bar 31, secure the spring teeth to the bar with the assistance of wing nuts 40 and associated bolts (not shown) which project between the guides 39 and through the slot 4|. It will now be clearly apparent that no difficulty will be experienced in achieving directional alignment of the spring teeth36 with the hangers 20.

Finally in this context it will be noted that the brackets 33 are skewed and project outwardly somewhat when viewed in plan beyond the limits of the framework. This is to permit separation of the spring teeth apart from each other and alignment thereof with the hangers .23 when the latter are also separated a maximum distance apart.

In the accompanying Figure '7 I have illustrated my blade carrier 65 the same consisting of an elongated, transverse, curvilinear stiffening bar, the cultivating blade 66 being secured against the upper surface 61 of this carrier and positioned between the upper surface thereof and the brackets 43.

Bolts 68 extend through the brackets, the blade and the carrier, which may of course be of any desired thickness or width, and it will be appreciated that the arrangement of the accom panying Figure '7 constitutes a peculiarly simplified form of blade carrier.

The blade is reversible upon detachment with the carrier or bar from the hangers 20, and upon being reversed, the bolts 68 of course, would extend through the apertures 69.

Since many modifications can be made in the invention herein described and since the accompanying drawings have been prepared only to i1- lustrate the relative arrangement and interaction of parts and not with regard to accuracy of dimensions for manufacturing purposes which in view of this disclosure I consider to entail merely mechanical skill together with the skill of the mechanical draftsman, and since many apparently widely different embodiments of this invention may be made within the scope of the accompanying claims without departing from the spirit and scope of the same it is intended that all matter contained in the accompanying specification shall be interpreted as illustrative only and not in a limiting sense and I desire only such limitations placed thereon as justice dictates.

What I claim as my invention is:

1. In a cultivator, an elongated, bodily detachable blade and stiffener combination, said blade when viewed in transverse cross-section, being convex upon the top side, said top side being in contact with the lower ends of spaced hangers depending from said cultivator superstructure, said stiffener being secured against the under side of said blade, said blade and stiffener being held in place by bolts extending through both and through the said lower ends of said hangers.

2. In a cultivator, an elongated, bodily detachable blade and stiffener combination, said blade having a leading cutting edge and a parallel trailing edge, and being convex upon the top side thereof when viewed in transverse cross-section, said top side being in contact with the lower ends of spaced hangers depending from said cultivator superstructure, said leading edge being in a lower horizontal plane than said trailing edge thereof,

said stiffener being secured against the under side of said blade, said blade and stifiener being held in place by bolts extending through both and through the said lower ends of said hangers.

3. In a cultivator, an elongated, bodily detachable blade and stiffener combination, said blade having top and under sides, at least one of said sides being arched, said top side being in contact with the lower ends of spaced hangers depending from said cultivator superstructure, said stifiener being secured against the underside of said blade, said blade and stiffener being held in place by bolts extending through both and through the said lower ends of said hangers.

CHARLES SHERWOOD NOBLE.

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