US203175A - Improvement in harvester cutter-bars - Google Patents

Description

LT. MGGORMIGK. Harvester Gutter-Bar.

No. 20s-,175. Ptented April 30,1878.

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UNITED STATES PATENTOFFIGE.

JAMES MCGORMIOK, OF PRINCETON, INDIANA.v

IMPROVEM ENT'IN HARVESTER CUTTER-BARS.

Specification forming part of Letters Patent No. 203,175, dated April 30, 1878 application led 2 March 12, 1878. Y

To all whom t may concern:

Beit known that I, J Ali/res MoGoRMroK, of Princeton, in the county of Gibson, and in the State of Indiana, have invented certain new and useful Improvements in Harvester- Cutters; and do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying. drawings, and to the letters of reference marked thereon, making a part of this specication.

My invention relates to sectional knives for reapers and mowers 5 and it consists in the construction and arrangement of the cutterbar, sectional cutters, and the devices for connecting the same, as will be hereinafter more fully set forth.

In order to enable others skilled in the art to which my invention appertains to make and use the same, I will now proceed to describe its construction and operation, referring to the annexed drawing, in which- Figure l is a plan view of my improved cutter-bar. Fig. 2 is a longitudinal section of the same on the line x w, Fig. 1. Fig. 3 is a transverse section on the line y y, Fig. 1. Fig. 4 is a perspective view of one of the connecting devices.

Arepresents the cutter-bar, provided at one end with the eye B for attachment to the pitman. C G are the knife-sections.

Each knife is formed on each side, at the base, with a square notch or slot, a, and they are connected to the knife-barA in the following manner: The bar A` is made of the 4square form shown in Fig. 3, and upon the eX- treme end is formed a bolt, b.

D represents a metal sleeve of such lform and size as to iit on the bar A,it being moved lengthwise from the end inward. This sleeve is open at the top at each end, leaving a top plate, D1, onlyinthe center. The ends of this top plate are beveled under, as shown in Fig. 4 at x w. The inner edges of the notches a in the knife-sections are beveled to correspond therewith.

The sleeves D are to form the connections between the knife sections and the knifebar; but at each end of the cutter a sleeve of just half the size is put on-that is to say, one sleeve is divided in the center to form the end sleeves, as shown at D2 in Fig. 2. A

One half-sleeve, D2, is first put on the knife- Abar A up to the shoulder formed by the eye B, and then a sleeve, D; but before this sleeve l edges x :v of said top plates, fitting over the beveled edges in said notches, will hold said section in place. Another sleeve and another knife-section are then put on, and so on to the entire length of the bar, when, at the outer en d, the second half-sleeve D2 is put on to complete the cutter-bar. A nut, d, and jamnut d are then screwed on the end bolt b, holding all the parts rmly together.

It will readily be seen that it is only necessary to loosen the nuts d d', when the sleeves can be sufficiently separated to remove any one or more or all of the knifesections, for sharpening or other purposes. the knifesections being in the center of the slides, and the joints of the slides being in the center of the sections, the whole bar becomes materially strengthened.

It will be noticed th at from the construction of the sections, should the knife receive a shock, the strain will be thrown ou the shoulder of the knife-sections, thus bearing the sleeve against the sides of the bar, and not toward the end; hence no strain comes on the nuts, and all the office required of these nuts is simply to tighten and loosen and hold in place.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. A cutter bar consisting of a straight bar, a series of removable sleeves having central top plates with beveled edges, and a series of removable knifesections having notches to correspond with the top plates, and arranged to break joints, substantially as herein set forth.

2. The combination of the knife-bar-A, with..

February, 1878.

JAMES MGGORMIOK. Witnesses CALVIN R. Hown, R. M. J. MILLER.

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