US1205321A - Harrow-tooth and fastener. - Google Patents

Description

C. C. BOYD.

HARROW TOOTH AND FASTENER.

APPLICATION men JULY 26.1916.

1,205,321 Patented Nov. 21, 1916.

Witnesses CALVIN C. BOYI), F PULA-SKI, PENNSYLVANIA.

HABBOVJ-TOQTI-I AND FASTENER.

Specification of Letters Patent.

Patented Nov. 21, 1916.

Original application filed March 27, 1916, Serial No. 87,040. Divided and this application filed July 26,

' 1916. Serial No. 111,459.

" tooth can be securely attached to a harrow beam, said fastening means operating both to hold th tooth to the beam and to prevent the tooth from swinging laterally out of proper position.

A further object is to provide a tooth which is so constructed as to be held against falling out of engagement with its fastening means should said fastening means work loose.

With the foregoing and other objects in View which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter de- \l scribed and claimed, it being understood tion.

In the accompanying drawings the preferred form of the invention has been shown.

In said drawings :-Figure 1 is an enlarged section through the structure constituting the present invention. Fig. 2 is a rear elevation of the parts shown in Fig. 1. Fig. 3 is a perspective view of a backing plate to be used in connection with a harrow tooth.

Referring to the figures by characters of reference 1 1 designates a bar forming a part of a harrow. The tooth used in connection with the bar is formed of a trans versely bowed strip 16 the lower end of which is flared and curved forwardly to a point as at 17, while the upper end of the tooth is flared outwardly as at 18. Arranged back of the tooth is a plate 19 having flanges 20 at the top and bottom thereof for engaging the corresponding faces of the bar 14. Ears 21 extend laterally from the backing plate 19 and segmental ears 22 extend forwardly from the end portions of the backing plate and are adapted to fit snugly against the concave face of the tooth. A U-bolt 23 straddles the tooth and extends through the bar 14: and also through a double washer 25 such as shown in Fig. 2, which washer engages the back face of the bar 14. Obviously by tightening the U-bolt 23 the tooth 16 will be clamped tightly against the backing plate 19 and the segmental ears 22. The arms of the U-bolt are extended through the cars 21 so that said bolt is thus prevented from spreading. I

Should the bolt become loosened accidentally, the tooth 16 could not drop out of position for the reason that the flared tion 18 would come against the bolt 23 and hold the tooth attached to the bar 1 1. Thus loss of the tooth is prevented.

In order that the bar 14 may be protected from wear and also provide an efficient backing for the tooth engaging means, the said bar is preferably provided with a wear strip 4A which can be of angle iron secured along the lower front edge of the bar.

What is claimed is 2- 1. The combination with a bar, of a backing plate upon the front face of the bar, said plate having rearwardly extending flanges for engaging the upper and lower faces of the bar, a transversely curved harrow tooth engaging the backing plate, said tooth having a flared upper end. and a bolt straddling the tooth and extending through the bar for binding the tooth against the plate, said flared end of the tooth constituting means for holding the tooth against downward displacement relative to the bolt. J

2. In a harrow the combination with a bar, of a. backing plate upon the front face thereof, forwardly extending segmental ears thereon, a transversely bowed tooth fitting snugly against the ears and back plate and 1 having a forwardly flared upper end, a U- bolt straddling the tooth and extending through the back plate and bar and constituting means for binding the tooth against the back plate and ears, the flared upper end of the tooth constituting means for holding the tooth against downward detachment relative to the bolt.

3. The combination with a bar and a backing plate engaging one face of the bar, said porplate having forwardly extending ears, of a In testimony that claim the foregoing harrow tooth straddling the ears and engagas my own, I have hereto affixed my signamg the plate, a fastening bolt straddling ture in the presence of tWO Witnesses.

th tooth and extending through the plate CALVIN G. BOYD. 5 and bar, said tooth having a flared upper Witnesses:

end for preventing downward Withdrawal R. McK. WHITE,

of the tooth from the bolt. MONT L. AILEY.

Copies of this patent may be obtained for five cents each, by addressing the Gommissionef of Patents, Washington, D. C.

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