US78197A - Improved method of constructing finger-bars of harvesters - Google Patents

Description

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Letters Patent No. 78,197, datedllfag/ y2G, 1868.

IMPRVBD METHOD OI' GONSTRUGTING 'IINGER-BARS l0I' HARVESTERS.

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TO ALL WHOM IT MAY CON CERN: l

Be it known that I, RUFUSDUTTON, of the city of New York, in the county of New York, and State of New York, have inrentcd a new and improved Mode or Method of Constructing the Finger-Bar of Mowing and Reaping- Machines; and I do hereby declare that thef'ollowing is a full, clear, and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon, and making a part of this speeication.

The nature o1' character ofmy invention or improvement consistsg Firstly,l in forming, by suitable mechanism, a blank-or plate, of metal, of a width sufficient for two ingerd bars, having its edges raised or turned up, and having also two other raised-or elevated ribs or parts, parallel to and each'at such` a distance from each edge-of such plate, that when the plate is.cut diagonally lengthwise through its` central part, each part or half into which it is so cut will have its straight edge turned up or raised,

andwll also be raised or curved parallel to such front edge, and near to or towards the back side; and

Secondly, in forming a. finger-bar, with two parallel ribs or raised portions, one at the front or `straight edge, and the other near or toward the back side, whether such bar is made singly, or from a plato made wide enough for two bars, and. afterwards cut in two parts.

Figure 1 is a section of a bar, having two raised ribs on it, and'ivith the fingers attached to it.

Figure 2 is a cross-section of a plate formed to make two hars like thatshowning. 1.

Figureo is a double plate, of reduced siz'e, of which lig 2 is a cross-section.

I consider it most preferable to rst form a plate or blank of metal wide enough for .two bars, and then cu't it in twdparts, as hereafter described. When this plan s adopted, a blank or plate of steel, or other metal, A13, is rolled out or formed', by suitable machinery or mechanism, of any thieknessdesired, and of a widthsnliicient for two iinger-bars. Such plate is turned up or raised on each edge, a Zalige. 2, 3, and is also turned up or has a raised rib, e d, on each side of and ntowards 4the middle Aot` the plate, parallel t'o the raised edges a b. Su'ch ribs or raised parts c ci are so located or placed with respect to the platesand its edges t t, that when such pl'ate is cut diagonally lengthwise, on a line 1 2, lig. 3, each part or half of the plate will have one edge, its

straight edge, raised or turned np, and will alsohave the rihor elevated portion, c or el, parallel to its front.

edge, and at or near the back side ofthe bar. i

Fig. 2 represents a cross-section of a plate, formed ,to make two bars, and as it is before it is cut into tvro parts.-

After the plate has been-so formed, and has been made the length required for the finger-bar, it is cut dr divided lengthwise, diagonally through its central portion, into two parts or halves, such diagonal line starting at one end ofthe plate, just behind one of the ribs or raised portions, c or d, `and terminating at the other end ofthe plate, just behind the other inside rib o r raised portion.

In gs. 1 and 2, the figures 1 2 indicate the starting and termination of such diagonal line` Each half of the plate, or each single bar A Aand B, has thus two raised or 'turned portions or ribs, one on the straight v edge of eac'h bar, andthe other parallel to it, and near'the back part of tho bar, and also forming the edge of the bar at its narrowest end. .At the widest end of the bar there will be, behind such back rib or elevated part, a Hat portion of the bar, which gradually decreases in width, and terminating at the narrowest end. This flat part ofthe bar, behind' the back rib, is shown n tig. 1.

A single bar, having such double ribs or raised portions, may be formecbby first rolling or forming a flat tapering plate, of steel or metal, the same as if for an ordinary dat bar, and then passing such plate between rolls, which shall depress the central portion, and form ribs o r tnrned-up parts at each end of such rolls.` The ribs on the bar being parallel to each other enable the plate to he treated and suhjcctedto rolls as described.

Such double ribs materially strengthen the bar, and on both the front and 4back sides. Such double ribs may also be formed on'a har, whether one of such ribs forms the front edge of the finger-har or otherwise.. Y

What I claim as my invention, and de sirc to secure by Letters Patent, `is

Constructing the ngewbas of harvesters substantially as described, that is, forming a. metallic plate of n. breadth sul`n`cient for two bars, such plate having its cdges'taisecl or turned up, and also having ribs or raised portions towards its centre, and parallel with its .edgea so that when such plate is divided diagonally length- 1 wise, into two partsyit will form two bars, each having two parallel ribs or raised portions, substantially as set forth.

R. DUTTON.

v Witnesses l Y S. D. LAW, FRED. B. SEARS.

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