US405580A

US405580A - Harrow

Info

Publication number: US405580A
Authority: US
Publication date: 1889-06-18
Anticipated expiration: 1906-06-18

Description

(No Model 2 Shets-Sheet 1.. D. G. MARKHAM. HARROW.

No. 405,580. Patented June 18, 1889 (No Model.) 2 SheetsSheet 2.

1). ,0. MARKHAM.

HARROW.

.No. 405.580. Patented June18, 1889.

VII/[III] a Q .71 Zimwey UNITED STATES PATENT OFFICE.

DE\VI TT O. MARKHAM, OF COLLINSVILLE, NEV YORK.

HARROW.

SPECIFICATION forming part of Letters Patent No. 405,580, dated. June 18, 1889.

Application filed December l8, 1888. Serial No. 298,946. (No model.)

To all whom it may concern.-

Be it known that I, DEWITT C. MARKHAM, a citizen of the United States, residing at Collinsville, in the county of Lewis and State of New York, have invented certain new and useful Improvements in I-Iarrows; 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 invention relates to improvements in harrows which bear reference particularly to the construction of the frame-work and the manner of bringing the sections together.

'The objects of my improvements are the construction of a double harrow of great strength, lightness, and durability and the reduction in the expense of manufacturing these articles.

My invention is illustrated in the accompanying drawings, in which- Figure 1 is a plan of a spring-tootl'i folding harrow with my improvement applied; Figs. 2 and 3, sections, respectively, on lines so 00 and y y of Fig. 1 and Figs. 4, 5, 6, and 7, details.

Referring to the drawings, A A are the separate sections of a double harrow united by front and back hinges M N.

D are. the draft-bars of the harrow, which may be made of channel or angle iron or wood, and E are the cross-bars, which maybe of the same construction. The cross-beams are united to the draft-bars by means of a saddle F, screw-bolt G, and nut 72 The saddle F is provided with upper lugs i and lower lugs j, the latter at right angles to the former. The saddle forms a seat for a cross-beam which is placed between the lugs 1 and the lugs j project down and closely abut against the sides of the draft-bar. The saddle F and cross-beam being thus placed in position on the channel-bar, the screw-bolt G is inserted through these three parts, the nut 72 applied, and these parts are then rigidly secured together. YVhen channel draft-bars are used, the screw G may be of such size as to have its head securely held between the channel draftbar without turning. The parts may be united and tightened or taken apart by the use of the nut 71. and a wrench.

A washer is 0 0, having shown, and may be used under the head of the nut.

L is a steel brace used to more securely unite the cross-beams and draft-bars. It is flattened at both ends and at one end secured to the top of a cross-bea1n by the screw-bolt G and nut h, and at the opposite end to the draft-bar by the same means. An additional brace L may be used.

The harrow is made folding by means of the front and rear hinges M and N. The front hinge M is composed of two parts t" i The part 11 is at one end provided with lugs screw-holes, and which are slipped over the bottom of the channel draftbar and bolted thereto, and at the other end with a post 0 The other part is provided at one end with similar lugs connected to draft-bar in the same way, and at the other end with a slot 0 in which the post 0 of part r" is placed and there held by means of a washer o and spring-pin The rear hinge N is also composed of two parts m m The part m, provided at one end with a seat or saddle the same as the saddle F, with lugs i and j, forms a seat for a crossbar and unites the same to the draft-bar in the same manner as the other saddles above described. The opposite end of on is provided with the pin m The other part m is also at one end provided with a seat and lugs and secured to the cross-beams and draft-bar, as above described. The other end of m is provided with a slot to accommodate the pin m and having also a washer 0 and spring-pin 0 to hold the hingesections togetherj The functions performed by the braces L and L are separate and important. The brace L is used as a bridge-brace either on the front or rear draft-bar at a point where such bar is not braced, as in other parts of the frame, by a cross bar connection. and the function performed by such brace is that it counteracts the downward and upward strain of the draft-bar incurred at such point, which would otherwise be unprovided for. It also enables a light form of draft-bar to be used in. place of the heavy bars generally employed to give strength and rigidity to the frame. The diagonal brace L is used to prevent lateral strain.

Having thus described myinvention,what I claim is 1. In a harrow-frame,r.l1e combination of a draft-bar, a cross-beam mounted on said draftbar, and a brace, such as L, for connecting the cross-beam and draft-bar to provide against upward and downward strain of the draft-bar, substantially as described.

2. In a barrow-frame, the combination of a draft-bar, across-beam mounted on said draft bar, and a brace, such as L connecting the cross-beam and draft-bar diagonally to provide against lateral strain of the draft-bar,

substantially as described.

3. A folding harrow-frame having its sections held together by front and rear hinges M N, in combination with the draft-bar and the cr0ss-beam mounted on said draft-bar, the said rear hinge N being a saddle connecting the draft and cross bar, substantially as described.

4. In a sectional barrow-frame, in combination with the draft-bars and the cross-beams, the front hinge M, composed of two parts 2" 2' provided with lugs 0 o,and one of said parts having a post 0 and the other a slot 0 substantially as and for the purpose described.

5. In a harrow-frame, the combination, with the draft-bar, the cross-beam mounted on said part, and the rear hinge N, provided with the saddle having the upward and downward projecting lugs, between which the cross-bar and draft-bar are held, and a bolt and nut for securing the parts together, substantially as described;

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

DEWITT C. MARKHAM. Witnesses:

JOSEPH H. BLACKVVOOD, M. J HOYT.