US260687A - Harrow - Google Patents

Description

l (NovModel.)

J. M. JOHNSON.

HARROW. No, 260,687. ,Patented Ju1y`4, 188.2.'`

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HARROW.

SPECIFICATION forming part' of Letters Patent No.4.260,687, dated July 4, 1882.

Application filed April 25, 1382. (No model.)

To all lwhom it may concern:

Be it known that I, JOHN M.J OHNSON, of Raritan, in the county of Henderson and State of Illinois, have invented certain new and useful Improvements in Harrows; and I do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, which form a part of this specification, and in whichl more fully described, and particularly pointed out in the claim.

My improved harrow is composed of two, three, or more sections, A, each section consisting of three parallel bars, C, arranged slantingly or obliquely to the draft-barB, to which they are connected detachably by links or eye-rods a and b, of unequal length-that is to say, all the short links a are of the same length and all the long linksb are of even length, by which means the several sections A A A are kept in their oblique position rela tive to the drag-bar, parallel to one another.

The three bars C C C which compose each section are connected parallel to one another by cross-bars D D, one at each end, and each separate bar is composed of two parallel pieces of Hat iron or bar-iron of suitable width and thickness, as shown at c c, which are connected by nutt'ed bolts dd. These bolts are inserted also through bolt-holes c in the clamping-blocks E E', which are inserted between bars c c, and have a top iange, f, on each side, which rests upon the top edge of bars c c. Each of these blocks consists of two halves, E and E', as shown more clearlyin Fig. 4 of the drawings, which are recessed on their inner sides, or the sides facing each other, as shown in Fig. S-that is to say, it has a circular recess, g, concentric with thebolt-hole c, and a top and bottomk recess, (shown at h and t", respectively,) which open up into the centra-l re cess, g. These recesses, it will be seen, are formedeach with a straight side or shoulder, It audit', and a slanting side or shoulder, h2 and i2, the shoulders h t" and h2 i2 being respectively parallel to each other.

F represents the harrow tooth, which is made ot' steel or iron and of the shape clearly shown in the drawings, from which it will be seen that it has a circular head, F', a short distance below the top, which has a central aperture or bolt-hole, k. The head F is of such size and shape that it will t into the recess g, formed by putting the halves E and E' of the clamping-blocks together, with its top part projecting up into the shouldered top recess, h, in said blocks. In other words, the tooth is pivoted upon bolt d within the clamping-block E E' in such manner that the top and bottom recesses, h and z', permit it to assume an inclined position in one direction, but a straight or vertical position in the opposite direction. f

'The number of teeth and blocks in v each tooth-bar depends upon the size of thcharrow, and by withdrawing its appropriate bolt any oneofthe blocks,withitstooth,maybedetached from the bar. Thus teeth with different-shaped points may be substituted for the form of tooth shown in the drawings, and it' a tooth is bent or broken va new one may readily be inserted in its place. y

By the described construction and combination of the barrow-teeth F, blocks E E', and bars (l, it will be observed that by changing the position of the draft-bar B from one end of` the harrow to the other the latter may be changed from a straight tooth77 to an inclined tooth harrowV at will, or vice versa, on account ot' the peculiar construction of the tooth-sockets h g i. The barrow, being made entirely of iron, will be found to be very strong and durable, its weight and draft being light at the same time, owing tothe skeleton-frame construction of the several barrow-sections.

Having thus described my invention, I claim IOO and desire to secure by Letters Patent of the United States- In n herrow, the pivotal teeth F, having the circular centrally-perforated heads Ff, in cour 5 bination with the clamping-bars c c, detachable clamping-blocks E E', having sockets h g i, and nutted bolts d, inserted through the perforated circular heads F and centrally through the clamping-blocks E E', and connecting the parallel lbers c c, substantially as and for the xo purpose herein shown and specified.'

In testimony that I claim the foregoing as my own I have hereunto etxed my signature in presence of two Witnesses.

JOHN M. JOHNSON. Witnesses:

M. M. FIELD, J. VOORHEES.

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