US725418A - Harrow. - Google Patents

Description

PATENTED APR, 1 4,"1903.

W. L. DEMPSEY.

HARROW. APPLICATION FILED MAY 2. 1902.

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cams vrrcqs co, manly No. 725,418. v PATENTED APR, 14, 1903;

W..L. DEMPSEY.-

HYARROW. APIfLIOATION FILED MAY 2. 1902.

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UNITED STATES.

WILLIAM L. DEMPSEY, OF FREDEBICKSBURG, VIRGINIA.

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SPECIFICATION forming part of Letters Patent 0. 725,418, datedApril 14,1903. Application filed May 2. I902. Serial No. 105,679. (No model.)

' State of Virginia, have invented new and useful Improvements in Harrows, of which the following is a specification.

This invention relates to harrows andthe blades therefor, and the primary object ofthe same is to provide a harrow which will more thoroughly break up or comminute the soil by a draw-cut operation in contradistinction to the usual drag of the ordinary harrowtooth.

A further object of theinvention is to provide a blade for a harrow which is constructed in such manner as to gradually depress into tages in view, the invention consists in the construction and arrangement of the several parts, which will bemore fully hereinafter described and claimed.

In the drawings, Figure l is a perspective view of a harrow embodying the features of the invention. Fig. 2 is atop plan view of the same. Fig. 3 is atop plan view of a slightly-modified form of the barrow. Fig. 4 is a longitudinal vertical section on the line 4 4, Fig. 3. Fig. 5 is a detail perspective view of one of the harrow-blades.

Similar numerals of reference are employed to indicate corresponding parts in the several views.

The numeral 1 designates a supportingframe, which in the present instance has a square contour and is formed of suitable channel-iron to provide flanges 2 to strengthen the same and at the same time lighten the structure thereof and also to produce a groove 3, which is particularly utilized at opposite tingencies.

forth. The flanges 2 are disposed inwardly andthe, outer surface of the frame is smooth; This particular form of frame may be varied at will and different shapes em ployed without in theleast detracting from the operation sought, and-for economyin the manufacture it is proposed to construct the frame from a single bar or piece of channel-iron which is bent into the shape shown and the terminals bolted together at the center of the front end,

one terminal being continued in advance of the other and shaped to'produoe a draft-eye 4 for the attachment of thedraft devices.

Extending across the frame at regular intervals is a series of supporting-rods 5, having heads at one end and nuts removably applied to the opposite end, whereby the said rod may be removed and replaced at will in varying the position and number of blades employed in the harrow to meetdifierent con- A plurality of blades 6 of a particular form areheld by the rods 5, and each blade has an upwardly-extending toe 7 and a rearwardly-projecting heel 8, a hanger-arm 9 rising from the latter and having a transversely-extending sleeve 10 immovably held in its upper terminal; transversely-extending sleeve 1] held therein, and in applying the blades to the harrow the supporting-rods 5 are passed through the sleeves 10- and 11. Each blade is formed with a lower reduced or cutting edge 12,

which extends gradually in curved bevel form from the toe to the terminal of the heel, and

when the several blades are mounted within operation to be effected in a vertical plane and in a downward direction. This operation is materially advantageous over the or-' dinary' straight drag operation of harrow- The toe 7 also has a- PATENT OFFICE. i I

j sides in'a manner which will be presently set teeth now commonly employed, and whereby lumps or clods of soil are frequently thrown o1- tn rned to one side without becoming broken or comminuted and pulverization is only practically effected after a number of movements of the harrow over the same surface or area. Moreover, it will be seen that as the improved harrow moves forward the blades will gradually depress toward theirheels, and in view of the greater depression being at the heels of the blades a practical penetration of the broken soil for a considerable extent will ensue at the heel portions of the blade, and thereby break up the lumps or clods which may have been turned over, and thus expedite the harrowing operation.

The sleeves 10 and 11 of the several blades hold the latterin proper adjusted relation on the supporting-rods 5, and the several blades can be disposed in various positions to facilitate the harrowing operation with increased advantage in View of the construction and operation of the several blades, as set forth. In the arrangement shown by Figs. 1 and 2 the blades are disposed in series of three, the two series at the front being converged toward each other and the two rear series similarly converged and positioned alternately in line with the centers of the spaces of the front series.

In Fig. 3 the blades are shown disposed in two series, those at the front being inclined or obliquely disposed toward the left and those at the rear also inclined or obliquely directed toward the right, the rear series of blades having their front ends or toes held in line with the centers of the spaces between the front series of blades. In this form of the harrow the front blades draw the soil over in one direction and the rear blades push or move it in an opposite direction, and this op eration, in conjunction with the shearing cutting action of the individual blade, results in a thorough pulverization of the soil treated. Another advantage of the improved harrow, in conjunction with the disposition of the blades in alternation, so that one set or series will be positioned in line with the spaces between the set or series in advance,is the treatment or breaking up of any lumps or clods that may be drawnbetween the forward blade with obvious beneficial results.

Theim proved harrow maybe provided with as many blades as desired, and the dimensions and proportions of the latter may be changed at will or to suit different kinds of work.

Another advantage in arranging the blades forward series will tend to draw the lumps or clods of soil between them for cutting or breaking up the rear series. This operation is peculiarly effective when the blades are disposed at an angle, as set forth.

Another advantage in the present construction is that two or more of theseries of blades hereinbefore described are so disposed that the heels of the forward series project backwardly and beyond the toes of the rear series of blades, thereby causing the heels of the forward series of blades to hold lumps and clods, while the rearseries of blades enter and cut into the said lumps and clods, and thereby completely pnlverize at one operation all the soil over which the harrow passes.

Having thus fully described the invention, what is claimed as new is- 1. In a barrow, the combination of a supporting-frame, and aseries of rigid blades immovably held at their opposite ends to the frame and of elongated form, the blades having opposite'straight parallel sides and the one series disposed to operate on the soil located between the blades of the other series and each blade having a lower downwardly and rearwardly inclined cutting edge, the greater portion of the cutting edge being normally elevated.

2. Ablade for a harrow, consisting of an elongated rigid body having opposite straight parallel sides and a lower cutting edge inclined from the front toe which projects above the upper edge of the body downwardly to the rear heel projecting from the body, the latter having a hanger-arm rising vertically therefrom and the upper terminal thereof together with the upper end of the toe being formed with laterally-projecting. sleeves.

3. In a barrow, the combination of a forward and a rear series of blades, the blades having toes at their front extremities elevated above the backs thereof and rearwardlyprojecting heels, the heels of the forward series of blades projecting backwardly beyond and between the toes of the rear series of blades, the blades at their rear ends having hangers rigidly rising therefrom, and aframe having transversely-extending bars to which the upper ends of said hangers and the toes of the several blades are directly and immovably connected.

In testimony whereof I affix my signature in presence of two witnesses.

WILLIAM L. DEMPSEY.

Vitnesses:

T. L. W. GREEN, L. L. LAYTON.

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