US440047A - Harrow - Google Patents

Description

H. L. MACK.

(No Model.)

HARRUW.

Patented NO v. 4, 1890.

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UNITED STATES PATENT GEEICE.

HENRY L. MACK, OF ELLENSBURG, IVASIIINGTON.

HAIR ROW.

SPECIFICATION forming part of Letters Patent No. 440,047, dated November 4,1890.

Application filed I une 26, 1890. Serial No. 356,794. (No model.)

To a/ZZ whom t may concern:

Be it known that I, HENRY L. MACK, a citizen of the United States of America, residing at Ellensburg, in the county of Kittitass and State of "Washington, have invented certain new and useful Improvements in Harrows and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of .this specification.

This invention has reference to harrows of the type generally represented in my patents, No. 400,697, dated April 2, 1889, and No. 421,739, dated February 18, 1890; and the present invention consists in certain improvements, hereinafter described and set forth, whereby the tooth-carrying bars are improved, the end hinge-connections of the same are rendered more durable than heretofore and equally applicable to either metal or Wooden bars, and the teeth are effectively clamped into position.

In theaccompanyiug draw ings, forming part of this specification, Figure lis a plan View of a harrow sect-ion embodying my improvement-s and showing the employment of both metal and wooden bars. Fig. 2 is a side view of of Fig. l. Fig. 3 is a detail view of one of the tooth-clampin g plates. Fig. 4 is a detail viewof one of the end hinge-loops in connection with the clamping-bar. Fig. 5 is a detail perspective view of a sectional tubular bar.

The frame is preferably formed similar to that disclosed in said patents, and consists of a single iron bar bent to form flatside parallel portions and transverse ends, the latter being turned upward. Upon each of the parallel sides are secured a series of castings a, each consisting of a horizontal base-plate, the ends of which are perforated for the passage of bolts to secure the casting to the frame, and each of said castings is provided centrally with a vertical ear b, transversely perforated for the engagement of al clip-bolt c. The tooth-carrying bars A A A2 are each designed to consist of two parallel sections, either of wood or metal, as may be found desii-able, according to the character of the work for which the harrow is designed. As shown in Fig. l, the parallel sections of the bars A A2 represent wooden sections, and the adjacent faces of the sections of the bar A are vertically notched o r recessed at several points, so that each pair of recesses will present a tooth-receiving opening, in which a tooth is securely held at any adj usted vertical height by means of bolts CZ d', which pass through said sections at either side of each tooth, and have nuts applied to their projecting ends, as shown. Instead of notching the adjacent faces of the wooden sections, as stated with reference to bar A, oppositelyarranged metallic clamp-plates e e may be arranged in the inner side, of the sections and have their vert-ical portions recessed or notched, while they are provided at the lower and upper edges with horizontal flanges, which embrace the section on which they are supported. Vhen such clamp-plates are elnployed, it will be noted that the securingbolts also pass through them, as they are pierced for such purpose. Vhen the parallel sections are made from metal, they are comparatively thin, as shown in the construction of the two rear bars A', Fig. l, and may be thicker in order to provide for the increased difference between the parallel sections.

I prefer to construct the hinged loops c and vconnect them to the parallel sections of the adjacent bar, as shown in Fig. 4, wherein the loop is represented as consisting of a long and short member, the former passing through one of the sections and seated in an opening in the other section,while the longer member passes through both sections, so that the threaded projecting end may be engaged by a nut c. The longer member is provided with an annular shoulder c2, resting against the face of the adjacent section in order to give the hinged loop proper bearing.

As shown in Fig. 5,it willbe convenient to provide tubular bars embodying the same general principle of parallel clamp-sections. The teeth fare rectangular in cross-section, or at least so at their upper portions5, but it is preferable that they should coincide with the shape of the recesses presented for them by the sections of the bars.

The construction set forth is simple, dur- IOC ' able, and comparatively inexpensive, and the teeth can be removably, adj ustably, and rigidly elamped, as will be understood.

I claiml. The combination, in a harrow, of the main frame having its side portions provided with perforated ears, toothed carrying-bars, and U-shaped clip-bolts engaging said projections and passing through said bars, and

secured by nuts, substantially as set forth.

2. The combination, in a harrow, of the main frame having its side portions provided With perforated ears, tooth-carrying bars, 'each comprising two parallel sections, com- Witnesses:

J AMES vP. SMITH, AUGUST SAssE.

HENRY L. MACK.

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