US1397104A - Harrow - Google Patents

Description

I E. W. McNABB.

HABROW.

APPLICATION FILED JULY 13, I920.

Patented Nov. 15, 1921 Zlwvwkbm EWM abb.

, UNHTEQ Ea'lATESPATENT OFFICE.

ERNST WATSON Manner, or warnnrown, 'rnnnnssnn, Assrenon 'ro "onrrnn nannow MFG. 00., ING, or'wnrnn'rowiv, 'rnnnnssnn HARROW.

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Application filed July 13,

To aZZ whom it may concern Be it known that I, ERNST WA'rsoN Mo- NAB-I3, a citizen of the United States, residing at l/Vatertown, in the county of Wilson and State of Tennessee, have invented a new and useful Harrow, of which the following is a specification.

This invention relates to harrows, and more particularly to adjustable harrows wherein the tooth bars thereof may be ad j usted with relation to each other for accomplishing various kinds of work.

The primary object of the invention is to provide a device of this. character having a novel form of adjusting means, whereby the tooth bars may be adjusted withfacility and eliminating any possibility of the adjusting means becoming bent or twisted, to render the device inoperative.

A further object of the invention is the provision of means for adjusting the outer tooth bars, which movementsimultaneously adjusts the inner tooth bars, toward and away from each other.

With the foregoing and other objects in view which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed, may be made within the scope of what is claimed, without departing from the spirit of the invention.

Referring to the drawing Figure 1 illustrates a plan View of a harrow constructed in accordance with the present invention.

Fig. 2 illustrates a sectional view taken on line 22 of Fig. 1.

Referring to the drawing in detail, the reference character 5 designates the tooth bars of the harrow, each of which is provided with a plurality of openings to accommodate the teeth 6, which are disposed in spaced relation with each other longitudinally of the respective tooth bars, and secured thereto in any suitable and well known manner.

Secured to each of the bars, adjacent the respective ends thereof, are the apertured lugs 7 the lugs of one bar being disposed directly opposite the lugs of the adjacent bar to accommodate the right angled ends of the link members 8, there being provided Specification of Letters Patent.

1920. Serial No. 395,880.

a bar 9 having openings adapted to be positioned over the ends of the respective link members for securing the link members to the lugs 7.

The adjusting means which form an important feature of the invention, include a relatively long arm 10 having one end thereof formed into a hook 11, which hook has connection with one of the bars as at 12," in a manner to permit the same to pivot with relation to the bar, the opposite extremity of the arm extending to a position over the bars of the harrow, for purposes to be hereinafter more fully described.

The arm 12 is also relatively long and extends across the upper plane of the tooth bars 5 and has connection with the arm 10, as by means of the pivot pin 13, the opposite extremity of the arm 12 being curved as at 14, and being pivotally connected to the opposite bar 5, as at 15.

A relatively short adjusting arm 16, has one extremity pivotally connected to the arm 12 as at 17, the opposite extremity thereof extending upwardly and connecting with the arm10 as by means of the bolt 18 which passes through one of the openings 19, which are disposed in the arm 16 in spaced relation with each other to permit of adjustment of the arm 16, withrelation to the arm 10.

A bracing bar indicated at 20 has one end connected to the arm 12 as at 21, the opposite endthereof having connection with the arm 10 as at 22, the arm 10 being supported between one end of the arm 12 and bar 20, to secure the same against lateral movement.

From the foregoing it is obvious that if the bolt 18 beremoved from the opening as shown by Fig. 2, and placed in the opening of the arm 16, nearest the free end of the arm 16, the bars will be moved closer together, the teeth 6 supported thereby, being disposed at angles, to more efliciently break the soil over which the device is operating.

Having thus described the invention, what is claimed as new is A harrow including a plurality of teeth bars, each bar having apertured lugs secured to opposite sides thereof, a link member having connect-ion with the apertured lugs, a relatlvely long arm having a hooked member formed at one end of the arm, said hooked member having pivotal connection with one of the bars, a relatively long arm having one end thereof curved and connected to one Patented Nov. 15, 1221.

of the outer bars and having its opposite end pivotally connected to the first mentioned arm, an adjusting arm having a plurality of openings formed adjacent to one end thereof and having one end pivotally connected to the second mentioned arm, means extending through the first mentioned arm and one of the openings of the adjusting arm for pivotally connecting the ad- 10 justing arm and first mentioned arm, and

the free end of the first mentioned arm being constructed to act as a lever.

In testimony that I claim the foregoing as my own, I have hereto afiixed my signature in the presence of two Witnesses.

ERNST WVATSON MoNABB.

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