US107337A - Improvement in rotary harrows - Google Patents

Description

rotating when striking a stone, stump, or other impediment, as well as a more thorough breaking up diluted seas are fitflyiirr.

Letters Patent No. 107,337, dated September 13, 1870.

liMPROVZEiMBNT IN ROTARY HARROWS'.

The Schedule referred to in these Letters Patent and making .part of the same. I

To all whom it may concern.-

Be it known that I, GEORGE COLLINS, of Fremont, in the county of Dodge and State of Nebraska, have invented anew and useful Improvement in Rotary Harrows; and I dohereby declare that the follow ing is a full, clear, and exact description of the .con stru'ction and operation of thesame, reference being bad to the accompanying drawing making a part of this specification, in which Figure 1 is a plan view.

Figure 2 is a front elevation.

Figure 3 is a sectionalview, in detail, of couplingbar, showing the connection of brace therewith.

Like letters in the different figures of the drawing indicate like parts. g

,My invention relates to a rotary harrow, having for its object the avoidingof resistance by the harrow and leveling of the soil, and consists in a combination and arrangement of devices as will be hereinafter fully described. I I

' A A'areliarrows.

B, a coupling-bar, arranged to connect at each end with a pivot-screw, a, projecting upwardly in the center of each barrow.

O O are braces, arranged one at each end of the coupling-bar, to connect with the pivot-screws, so as form a steady bearing for the latter, which are passed through the underside of the harrows, where the center beams intersect one another at right angles, and fastened rigidly thereto.

The braces are fastened to the coupling-bar by bolts and screw-nuts, the bolts passing through elongated slots 1) b in the coupling-bar.

The object of the slots is to give tothe axis of the harrows an angular position with the vertical, so that the barrows may be made to rotate either way.

I) is the tongue, having an opening cut transversely on its upper side near therear cnd,and a spring plate, 0, arranged over the opening, and attached, by a screw or otherwise, a little forward of it.

The tongue is attached to the coupling-bar by rais- 'ing the spring-plate up and placing the tongue so that the opening will embrace the coupling-bar; the opening is made loose enough to allow the tongue to slide laterally therein either way; the spring plate .prevents it from becoming detached from the bar.

The tongue is further secured by the braces E E, one oneach side, arranged with additional braces at their rear ends, F F, to connect with the pivot-screws.

The forward endslof the braces E E intersect one another on the tongue, and are secured thereto by a pivot-screw, d. This arrangement of the tongnewith the coupling-bar and braces E E allows it to have a lateral movement either way, thus avoiding any too sudden or abrupt stralnvupon the team bythe barrow striking a stump or other impediment, as well asfacilitating the rotating of the harrow in avoiding the latter.

The coupling-bar is bowed from end to end, so as to elevate the tongue sufficiently to keep the draft from I the neck of the horse.

The braces 1 F are riveted or otherwise fastened to the braces E E, which latter are placed over the pivot-screws first, and then the ends of the couplingbar next, with the braces G O of the latter under those of the former, and the whole. then secured by screwnnts e c.

Having thus fully described my invention,

What I. claim therein as new, and desire to secure by Letters Patent, is-

The arrangement of coupling-bar B, provided with movable or adjustable braces C O, braces- E F and E F,-tongue- I), having its rear end arranged as described, and pivot-screws a a of theharrows A A, substantially as shown and set forth.

As evidence that I claim the foregoing as my invention,.1 have hereunto set my hand and seal in the presence of two witnesses.

' GEORGE COLLINS. [n. s.]

Witnesses:

T. S. Cox, N. M. Prnsn'onv.

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