US407658A - Rotary harrow - Google Patents

Description

J. R. HICKS.

ROTARY HARROW.

(No Model.)

No. 407,658. Patented Julyzs, 1889.

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JAMES R. HICKS, OF 'KANSAS CITY, MISSOURI.

ROTARY HAnRow.4

SPECIFICATION forming part of Letters Patent No. 407,658, dated July 23, 1889.Y Application filed-September 28, 1,888. Serial No. 286,640. (No model.)

To all whom t may concern.'

Be itknown that I, JAMES R. HICKS, ofV -Kansas City, Jackson county, Missouri, have View of a harrow embodying` my improvement. Fig. 2 represents a top plan view of the portion of a harrow-frame to which my improvement is applied, the preferred form` being shown. Fig.'3 is a side elevation of the central portion of a revolving harrowframe, partly in section, illustrating the interior construction of the preferred form of anti-friction bearing. Figs. 4 and 5-are side elevations of a modified form of the device, some portions being shown in section.

My present improvement in center bearin gs for revolving harrows is adaptable to many forlns of such an implement, either single, duplex, or in connected series of revolving frames. The preferred form for its utilization is shown as embodying the .salient features of my patent, No. 369,600, dated September 6, 1887. A brief description of the plan of construction of this harrow will be given to render 'clear the operation of such parts as constitute the subject of my present invention, reference being specifically made tothe annexed drawings, that have already been mentioned.

The harrow shown complete in Fig. l consists, essentially, of two revoluble frames A,

` and as the construction of these is similar a description of one will suffice for both.

The frames are preferably made circular, and for the purpose of saving material are each composed of a iiat ring C, that is superimposed upon the arms c, which radiate from a central hub-plate G. (See Fig. S for an enlarged view of the paris.) The hub-plate G is a circular metallic disk having a central perforation for thereception of Vthe vertical king-bolt o, and concentric therewith an integral vertical annular flange g is formed on the top surface of the plate G. The space B intervening' .between4 the flange g and the king-bolt Z1 when the latter is in position is such as to y permit the insertion of a series of true spherical balls B, that are preferably made of metal hard enough to withstand wear. On the upper surface of the flangeug a cap-plate Eis mounted and secured by the bolts 7s, said bolts being inserted through proper-sized perforations made at spaced intervals in the cap-plateE and hub-plate G oppositely, the bolts corresponding in number to that of the radial arms c, through which theyare inserted and serve to hold in place.

As will be seen in Fig. 2, the radial arms c have their inner ends mitered on the edges to permit these edges to have bearing contact, and the series of arms to mutually brace and support each other laterally, the bolts 7c passing through each" arm at a suitable distance from their inner ends, which ends abut against the outer surface of the flange g, as shown.

In Figs. el and 5 there is a form of antifriction bearing for the king-bolt shown, in which rollers B are employed in lieu of the balls previously described. These rollers occupy the annular channel B', and are of such relative length and diameter that when the space is completely filled with the rollers the king-bolt b will be afforded a rolling support that is the equivalent of the ball-bearing shown in Figs. 2 and 3, the cap-plate E holding the rollers from vertical displacement in like manner.v

Each of the arms c is provided with a suitable number of depending teeth d, as shown in Fig. l.

In order to support the harrow-frames `C and adapt them to rotate and pulverize the soil over which the harrow is drawn, the draftframe D is provided. This is mounted on clevis-arms g', that are secured to project forwardly from the ends of the frame and at right angles to the same. Both the clevisarms g and the draft-frame D are vertically perforated to engage the king-bolts b, the nuts IOO on which bolts bear on the upper surface of the frame D to hold the parts intact and permit the barrow-frames A to rotate freely.

On the draft-frame D the drivers seat i is mounted at about the center of saidv frame, and the bracketframes, which support the vertical screws h, are aflixed rigidly to the top face of said draft-frame on each side of the seat, so that the hand-wheels on the up-A per ends of the screws h will be conveniently located to be manually operated by the driver when the harrcw is in motion; h terminate below the frame D in bifurcated ends m, which are adapted to support theV pressure-Wheels f on journal-bolts inserted through perforations made in these forked portions of the screws h.

The purposes for which the pressure-wheels f are provided have been fully detailed in my Patent No. 369,600, and as they do not constitute a necessary portion of my present invention, I will not further consider them. A foot-rest e, as will be seen in Fig. l, is oonveniently located in front of the drivers seat. The arms g are intended to receive clevislinks for the attachment of a pair of horses or other draft-animals, said arms extending a proper distance in advance of the rotating barrow-fram es to avoid contact of the animals therewith.

It is evident from the foregoing description of parts that the harrow-frames will rotate with greatly-diminished frictional resistance The screwsY at their center of motion, and that lubrication of the working parts where contactis had with the king-bolts b may be dispensed with. From the great reduction in friction of the working part-s an important saving in draft force is effected and the durability of the machine largely increased.

I am aware that anti-friction devices-such as balls and rollers-have been used in rotary harrows and in bearings of various kinds, and I do not desire to claim such an invention broadly.

Having fully described my invention, what I claim'as new, and desire t0 secure by Letters Paten t, is

- In a rotary harrow, the combination, With two similar harroW-frames A A, that are circular and each composed of a central hubplate G, having upright iange g, cap-plate E, bolts la, and spaced arms o, of king-bolts b, located in central perforations of said plates G and E, and two sets of anti-friction rolling devices that are loosely held between and in contact with the king-bolts and the upright flanges of said hub-plates, substantially as set forth.

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

JAMES R. HICKS.

Witnesses:

F. G. FISCHER, F. C. FARR.

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