US43500A - Harrow-teeth - Google Patents

Description

Harrow-Teeth.

Patented July 12""1864 fave Infor, @jy 5l@ v m VVQ @ZV/ I j? witnesses dw/wb Jn #M NrTEn STATES PATENT GEETEE.

EBEN N. HIGLEY, OF LAKE VILLAGE, NE7 HAMPSHIRE.

Specification forming part of Letters Patent No. 43.500, dated July 12, 1864.

To all whom it may concern:

Be it known that I, EBEN N. HIGLEY, of Lake Village, in the county of Belknap and State of New Hampshire, have invented anew and Improved Construction of H arrow-Teeth 5 and I do hereby declare that thevfollowing is a full and exact description thereof, reference being had to the accompanying drawings, making part of this specification- Figure 1 being a bottom view of a double tooth or pair ot' teeth constructed in my irnproved manner; Fig. v2, a side view ot' the same, shown as attached to the barrow-frame; Fig. 3, a rear view thereof; Fig. 4, a bottom view of a harrow provided with the improved teeth.

Like letters designate corresponding parts in all ofthe figures. l v

I make my improved harrow-teetli in pairs B B, attached t-o a common stock, A, subst-antially as represented in the drawings. I generally make the stock and teeth ot' cast-iron and in one piece, and yet they may be made ot' wrought-iron and riveted together; but the cast-iron is so much cheaper and wears so much better that the teeth thus formed are preferable,if sufcientstrength can be secured. I accomplish this by casting a thin web, c, behind each tooth, joining both with the tooth and stock. This web greatly increases the strength of the tooth without adding much to its weight, and Without offering any obstruction to the passage of the tooth through the ground. The teeth B B are as far apart as it is desired to have any two teeth ot the harrow.

There may be more than two teeth on each stock A; but it is most convenient and suitable to have only two. These teeth are near the rear edge ofthe stock A, as shown, and in the front end ot' the stock is a hole, C, through which a bolt passes, and through the harrowframe D, to secure the teeth to said frame. This bolt also serves as a pivot on which the stock A turns or vibrates, so that each pair of teeth has a self-adjusting motion-very useful to free them from obstructions, and thereby avoid breaking them, as well as to make the harrow run more freely.

Fig. 4 indicates the arrangementot the teeth on the barrow-traine. The space between the adjacent teeth ot' successive pairs or sets is equal to the distance between the teeth of one set or "stock, or thereabont.

What I clailn as my invention, and desire to secure by Letters Patent, is-

1 Making barrow-teeth in sets ot two or more teeth attached to the same stock, and pivoting the said stock to the barrow-frame, substantially as and for the purposes herein specified.

2. The webs a a on the barrow-teeth for strengthening them, arranged substantially as set forth.

The above speciticationof my improved harrow-teeth `signed by me this 18th day of March, 1864.

EBEN N. HIGLEY.

Witnesses: ,a

C. H. SLEEPER, THOMAS HAM.

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