US394514A - Harrow - Google Patents

Description

(No Model.) 2 sheet -sheet 1.

J. H. SHARP.

HARROW.

,No. 394,514. Patented D80. 11, 1888.

A a I llllllll HHlUllllliillllllllll mt qwvm w/owa (No Model.) 2 Sheets-Sheet 2.

J. H. SHARP.

HARROW.

No. 394,514. Patented Dec, 11, 1888.

UNITED STATES PATENT OFFICE.

JOHN H. SHARP, OF COLUMBUS, NEW JERSEY.

HARROW.

SPECIFICATION forming part of Letters Patent No. 394,514, dated December 11, 1888.

Application filed January 31, 1888. Serial No. 262,496. (No model.)

To all whom it may concern.-

Be it known that I, JOHN ll. SHARP, a citizen of the United States, residing at Columbus,in the county of Burlington and State of New Jersey, have invented certain new and useful Improvements in Harrows; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My present invention relates to wheel-harrows; and it consists in the construction and novel combination of parts, as will be hereinafter fully described, and specifically referred to in the claims.

In the accompanying drawings, Figure 1 is a plan view of a wheel-harrow embodying the essential features of my invention. Fig. 2 is avertical sectional view of the same. Fig. 3 is a sectional view showing the curved harrowteeth secured to one of the harrow-bars, and Fig. 4 is a detail perspective view of one of the barrow-teeth. Fig. 5 is a detail view of a modified form of tooth.

Similar letters of reference indicate like parts in the several figures of the drawings.

Referring by letter to the said drawings, A designates the axle of the harrow, said axle having fixed to its ends the arms B 0, upon which the supportingwheels D are loosely mounted, so that the latter will revolve on their journals when the machine is drawn along.

F is the tongue of the harrow, the rear end of the same being hinged to the axle at the middle part thereof. Diverging braces G are also hinged at their rear ends to the axle A, their forward ends being secured to the tongue in any convenient manner.

From the axle A, between the wheels D, is suspended the front tooth-bar, II, of the harrow, the said bar being the reverse of L shape in cross-section-that is, the base of the L extends to the left instead of to the right. To the under face of the bar H are secured the longer and shorter harrow teeth or blades I. Each of these blades or teeth is twisted at its front end to form a head, K, which is provided with a bolt-hole, L, and a flange, M, the 50 latter being upturned to engage the vertical rib of the harrow-bar, to which it is bolted when in place. The longer harrow-blades are curved laterally intermediately of their ends and the shorter blades are located between the longer blades, the shorter blades being preferably of a straight shape.

N designates the rear harrow-bar, which is similar in shape in cross-section to the front harrow-bar. l'pon the rear harrow-bar only the longer curved teeth or blades are used, and they are curved oppositely to the longer teeth on the front harrow-bar. The rear harrow-bar is connected to the front harrow-bar by diverging rearwardly extending hingearms I, which engage lugs Q 011 the front harrow-bar and extend rearwardly, and are provided with angular bends which enter eyes R, projecting forwardly from the rear harrowbar, as shown.

From the front harrow-bar, at about the middle of its length, rises a standard, S, to which are fulcrumed the front ends of the seat-arms 'l '1". Upon the rear ends of the seat-arms a seat, U, is secured, and beneath the seat I a lifting-arm, V, is pivoted, so that the rear harrow-section may be lifted when necessary.

The lower end of a vertical rack, \V, is secured to the rear harroW-bar and extends upwardly therefrom. The upper end of rack \V is pivoted between the parallel seat-arms 'l T. X X are rearwardlyextending metal straps, the front ends of which are pivoted to the outer faces of the seat-arms.

Near their rear ends the metal straps X X are provided with bolt-holes Y, in either pair of which a bolt, Z, may be placed to engage the teeth of the rack IV. A bolt, a, is placed in the said straps in front of the rack \V to hold it in its place after the adjustment has been made.

Near the middle of its length the front harrow-bar is provided with a fixed segmental cog-gear, I), through which the axle A passes, and in which it turns when necessary. The lower end of a lever, c, is keyed or secured to the axle A alongside of the segmental cog-gear b. The lever c is provided with a springpressed detent, (Z, the upper end of which is connected by a link-arm, c, with a hand-lever, f, by which said detent is raised when it becomes necessary to raise or lower the axle for any purpose whatever.

By manipulating the lever c the supportingwheels may be lifted and turned up out of contact with the ground when it is desired to use the teeth of the harrow to the fullest extent, or the wheels may be turned down and caused to carry the front portion of the harrow above the ground, thus giving the desired will be elevated out of and the opposite end lowered into contact with the soil. The tooth is held firmly in place by having its upper edge fitted in a groove formed in an angular block or chair, I, which is secured to the under side of the harrow-bar H. The tooth is locked in position by a bolt, J, extending below and bent under its lower edge, and which extends up and through the bar H, at which point it is provided with a suitable nut, the unscrewing of which loosens the tooth and admits of a ready removal and reversal.

Having thus described my invention, what i I claim as new, and desire to secure by Letters Patent, is-

1. The combination, with the axle having angle-arms on its ends and wheels mounted on said arms, of a tooth-bar pivoted to the axle having alternate long and short teeth or blades secured thereto, a standard mounted on said bar having parallel seat-arms pivoted thereto which extend rearwardly, a rear bar having teeth or blades of equal length secured thereto, hinged arms connecting said bars, a toothed rack on the rear bar working between the parallel seat-arms, and straps pivoted to the seat-arms having connected ends which engage with said rack, substantially as described.

2. The combination, with the axle having angle-arms on its ends and wheels mounted on said arms, of a toothed bar having a standard thereon, a segmental gear on the axle, a lever provided with a detent engaging said gear and having a link-connection with the handle -lever, parallel arms pivoted to the standard, and a rear bar having hinged connections with the said other bar, and having a toothed rack thereon, substantially as described. l

The combination, with the axle having its ends bent at right angles and wheels mounted on said ends, of a gear secured on the axle, a lever having a detent engaging with said gear, a toothed bar secured to the axle having an angular base to which the teeth are secured, a standard mounted on the bar, parallel arms secured to the standard, straps pivoted to said arms having their outer end connected by abolt, the rear tooth-bar hinged to the said other bar, a toothed rack secured on the same working between the parallel arms and the straps, and a lever pivoted to the ends of the parallel arms, substantially'as described. V

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

JOHN H. SHARP. [L. s] Witnesses: l

PARKER H. SWEET, Jr.,

ROBINSON WHITE.

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