US321071A - Harrow - Google Patents

Description

(No Model.)

H. L. WHITMAN,

HARROW.

110. 321,071. Patented June. so, 1885.

N, PETERS. Phcto-Lhhognphcr, Wl h lines, and inclined in dotted lines.

UNITED STATES PATENT OFFICE.

HENRY L. WHITMAN, OF ST. LOUIS, MISSOURI.

HARROW.

SPECIFICATION forming part of Letters Patent No. 321,071, dated June 30, 1885.

Application filed August 5, 1884. (N0 model.)

To all whom it may concern.-

Be it known that I,-HENRY L. WHITMAN, a citizen of the United States, residing at St. Louis, State of Missouri, have invented certain new and useful Improvements in Harrows, of which the following is a specification, reference being had to the accompanying drawings, in which- Figure 1 is a perspective view showing the teeth of the harrow straight vertically in full Fig. 2 is a longitudinal section of a portion of one of the bars, showing a tooth both vertical and inclined; and Fig. 3 is a transverse section in front of one of the bolts which clamp the angle-iron which comprises the bars.

My invention relates to the class of harrows the bars of which are composed of angle-iron; and it consists, chiefly, in the manner of securing the teeth to the bars so that said teeth will be vertical when the draft is in one direction, and inclined when the draft is in the reverse direction.

Referring to the drawings, like letters of reference indicate corresponding parts in the different views.

A represents the bars, which are constructed of angle-iron.

B B are the end bars, which may be of any suitable form, but are preferably flat, as shown in Fig. 1, with the end of the compound bars A bolted between them.

0 represents the teeth, which are of any approved form, and are secured to the bars A, as will be presently explained. The bars A are constructed, as is usual when made of angle-iron, of two pieces reversed, so as to form a rectangular bar. The top of the bar is provided with perforations or slots about the size of the top of the teeth; but one of the walls of the said slots is inclined, as shown at a, Fig. 2. The bottoms of the bars A are also provided with slots longer than the dimensions of the teeth, as shown at a, Fig. 2. Two of the walls of these top and bottom slots are in the same vertical plane; but the other wall of the lower slot does not coincide with the upper one, but extends beyond it, and is also beveled or inclined, so that the teeth may be inclined, as shown in dotted lines, Fig. 2.

The bolts D, which clamp the angle-irons together to form the bars A, are placed adjacent to the teeth, and at one side of them only. I use the ordinary straight harrow teeth, which are made with an enlargement at their upper ends, so that they will not fall through the slots or apertures made for them in the beams. As the angle-iron used for the beams or frame is comparatively narrowabout an inch and five-eighthsand as the pins or teeth are only held between the angle-bars for a small portion of their length, the angle-bars may be bolted comparatively tight, and yet in practice I find the teeth will stand vertical when the shaft s applied at one end, and that all the teeth will assume inclined positions, as shown, when the shaft is reversed.

Suitable braces, E E, are secured to the longitudinal bars A, and devices F F, of any desired construction,are attached to the harrow at both ends.

The operation of the harrow is obvious. When the draft is in one direction, the two walls of the top and bottom slots, wh ch are in the same vertical plane, together with the bolt D, form fulcra for one side of the teeth, and all the teeth in operation will be vertical. By reversing the line of draft-or, in other words, hitching the horses to the opposite end of the harrow-the lower slots being longer than the width of the teeth, the latter will all be inclined, as shown in dotted lines of the drawings, and the inclined walls of the top and bottom slots on reverse sides will then be the fulcra for the teeth. By my invention I am thus enabled to construct a harrow in which the teeth are automatically adjustable to either a vertical or inclined position by simply chang ing the line of draft. I

I am aware that it is not novel to use bars of angle-iron bolted together for the frame or beams of harrows, nor to construct them with teeth which are adjustable by changing the line of draft, and I do not claim either,-broadly.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-- 1. In a reversible harrow, the longitudinal bars composed of angle-iron bolted together, the tops of one set of bars being provided with apertures nearly the size of the teeth, and the bottoms of the corresponding parallel bars havi ng slots longer than the width of the teeth, in and the reversible devices, substantially as set 10 combination with the straight teeth, the transforth. I verse clamping-bolts, and the end bars, sub- In testimony whereoflhaveaflixed my signastantially as set forth. ture in presence of two witnesses.

2. In a reversible harrow, the combination of the longitudinal bars constructed of angle- HENRY WHITMAN' iron and provided with apertures and slots having beveled walls, as described, the transverse clamping-bolts at one side of the slots,

WVitnesses:

GEORGE E. BENNETT, V. A. STEPHENS.

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