US443791A - Sickle-bar for harvesters - Google Patents

Description

(No Model.)

W. H. PALMER.

SIGKLE BAR FOR HARVESTERS.

No. 443,791. Patented Dec. 30,1890.

' y E 1 I 1 1 25555: yftl/gibzw v \Nllllam' HPal-n E1" 4 Wm A EH * 'NITED STATES ATENT \VILLIAM II. PALMER, OF YALE, MICHIGAN.

SlCKLE-BAR FOR HARVESTERS.

SPECIFICATION forming part of Letters Patent No. 443,791, dated December 30, 1890.

Application filed October 10, 1889. Serial No. 326,641. (No model.)

Tq all whom it may concern..-

Be it known that I, WILLIAM H. PALMER, a citizen of the United States, residing at Yale, in the county of St. Clair and State of Michigan, have invented certain new and useful- Improvements in Sickle-Bars for Harvesters, of which the followingis a specification, reference being had therein to the accompanying drawings. I

This invention relates to new and useful improvements in sickle-bars for harvesters; and the invention consists in the novel construction and arrangement whereby the sickles or knives are detachably secured to the sickle-bar, all as more fully hereinafter described, and shown in the accompanying drawings, in which- Figure l is a plan of a section of a sicklebar detached from the harvester. Fig. 2 is a longitudinal section thereof 011 line 0c 90. Fig. 3 is a cross-section of a sickle-bar on line y y in Fig.1, showing it in position as in operation. Fig. at is a cross-section .of a sickle-bar with sickles of slightly-modified form. Fig. 5 is a plan view of a modified form of sicklebar embodying my invention in another form. Fig. 6 is a cross-section thereof on line to w, and Fig. 7 is a detached plan of one of the notched sickles.

A represents a series of sickles or knives of the usual form. B is the sickle-bar to which they are secured; C, the finger-bar, and, D the fingers in which the sickles operate as in the usual manner, except as hereinafter described.

My invention consists in the novel manner in which the sickles are secured to the sicklebar, and to this end I use the following means: The sickle bar I preferably make in two parts, which I secure together at intervals by rivets E, with an open slot equal to the thickness of the knives between them and extending the whole length of the bar. Into this slot the knives are assembled side by side and clamped against a fixed abutment at one end of the slot by a wedge F, driven in at the other end of the slot between the first knife of the series and the fixed abutment or rivet G. This wedge or key I secure in a substantial manner by a set-screw or otherwise, so that it will not be liable to become detached, except for the purpose of detaching the knives from the bar. I preferably secure the rivets E, which secure the two parts of the sickle-bar together at intervals, coincident with the width of three knives, so that one rivet passes between each third knife, allowing the wedge to act throughout the whole series of sicklcs to clamp them together, the edges of the knives adjoining the rivet having notches H cutinto them, as shown in Fig. 7, which notches have to be deep enough to prevent the sickles from binding upon the rivet. .With a sickle-bar so constructed it will be seen that if it is desired to remove the knives, for the purpose of grinding or otherwise, from the sickle-bar, the wedge being first loosened, every knife in the center of the three constituting a section can be driven out backwardly, as shown in dotted lines in Fig. 1, and after it has been removed the two adjoining knives may be disengaged from the sickle-bar. Thus every section can be readily removed in the same manner. The mounting of the knives on the bar is then accomplished in the reverse manner, andafter they are put in position side byside the wedge is then firmly driven in, so that all the knives crowd against each other against the abutment held between the fixed abutment at one end and the end of the bar at the other. I do not intend to confine myself to this construction alone, as it is obvious that upon the principle I have now described many modifications may be made-sueh as, for instance, that instead of one wedge to hold the whole series of knives, several wedges may be used, each one for a portion of the series of knives; and, further, to give more stability to the knives of the sickle-bar the knives may be provided with a downwardly-p rojectingflange I at the rear end, as shown in Fig. 4, or as shown in Fig. 6, in which said flange extends to the under side of the sickle-bar. With a sickle-bar of this latter construction it will be seen that my principle of clamping the knives in series may be applied with a single sicklebar, as shown in Fig. 5, and that, instead of a wedge F for clamping, a screw J or other ICQ Further, my construction makes use of the simpliest form of sickles, and thus admits of interchangeability with almost any form of sickles used in the diflferent styles or constructions of harvesters, provided the sickle has the right width; and, further, it will be seen that with my construction it will be practicable to remove any of the knives in case of emergency without dismounting the sickle-bar from the harvester. As, suppose the sickle-bar to be held in position in the usual manner, as shown in Fig. 3, it will be possible, without removing or turning the springplates K out of the way, that the rear edge of the sickle-bar may be sprung up suliiciently to dismount the knivesin the manner before described. This is a decided advantage, as with most other constructions the sickle-bar has to be dismounted entirely, and thus a vexations delay occurs.

A further advantage of my construction is that the whole series of knivesfbeing' clamped together in one body, there is no liability of any one knife becoming loose, and as there is but one locking device for the sickles the mounting and disinounting are quickly ac complished.

The rivets E, which secure the two parts of the sickle-bar together, are in the first place for the purpose of keeping the two bars in their proper relative position to each other; and it will be conceded, also, that they form an element of stability for the knives, as each rivet passing between two sickles will hold the same against displacement in the line of the draft.

\Vhat I claim as my invention is- In a sickle-bar, a series of rivets or posts E and a series of knives arranged in groups of three between the posts, the outer knives of the groups having side grooves in their outer edges, in which the rivets enter, and the center knives having even edges, permitting an easy insertion of the same between the outer knives of the group, and a'clamping device to secure the knives in place, substantially as described.

In testimony whereof I aifix my signature, in presence of two witnesses, this 3d day of October, 1889.

' WI LLIAM Il. PALMER.

Vt'itnesses:

ED. MoBaEAn'rv, Geo. A. GREGG.

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