US109482A - Improvement in thrashing-machines - Google Patents

Description

J. ALLONAS. T hrashing lVIaJohine.A

No. 109,482. Patented Nov. 22, 1870.

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Letters Patent No. 109,482, dated November 22, 1870.

IMPROVEMENT IN THRAS`HING-MACHINES.

The Schedule referred to in these Letters Patent and making part of the same.

To -all whom it may con-cern p Be itknown that I, JOSEPH ALLoNAs, of Mansfield, county'of Richland and State of Ohio, have invented certain new and useful Improvements in rlhrashing- Machines, of which the following is a full, clear, and exact description, reference being had to the accompanying drawing making a part of this specification, in which- Figure 1 is a perspectiveview of my improvement. Figure 2 is a vertical transverse section, showing, in dotted lines, tho relative position of the thrashing-cylinder and the teeth of the concave.v

Figure 3 is a detached view, showing the manner of attaching the teeth to the concave.

The invention consists in- First, combining with. a reticulaled or perforated concave triangular teeth, having their upper or working-edges hollowed out or concaved, and their. sides ribbed or roughened.

Second, in providing the groo'vcd sector-pieces, which support the sections of concave, with radial ribs o1 spurs, whereby theyarc made to assist in thc separal tion of thc grain; and

Instead of ribs b', spurs may be employed, or any other means of roughening the surface of these plates,

without departing from the spirit of my invention.

Plate B may be adj ustably secured to frame A Al A2, in any desired manner, there being, of course, one plate at each end of the concave.

C is a section o f the concave.

It .is perforated or reticulated, as 'shown in the drawing, and grooved transversely for the reception of 'thelower edges ofthe teeth D.

. 11.', substantially as described.

These teeth are triangular in form, being convex upon their lower edge, as is plainly shown in iig. 3, in order to lit accurately the upper face of the section C,

'and concave upon their upper edge, for a purpose Ifacilitating the separation ofthe grain from thc-straw.

In operating my thrasher, the cylinder (represented by dotted lines in tig. 2) is driven rapidly in the direction indicated by the arrow in this vligure. As the straw is drawn in, it at lirst moves easily over thc upperedges of the teeth, the gradual risc of the curves offering but littlel resistance to the advancing straw, until it (the straw) reaches the rear end of the tooth, when it is suddenly driven down between -thcm with a sharp blow.

lAs thrashers are ordinarily constructed, ymore Vor less grain will slip through between the outer row of cylluder-teeth andthe inclosing-franie or sides, without being properly thrashed, and, in order to remedy this dilliculty, I form the ribs b upon sector-plates B.

Having now described lnyv invention,

y What I claim as new, and desire to securcbyl. The combination ot" Vthe rcticnlated concave section Gand the triangular teeth D having their upper or working-edges made concave in form, substantially as described.

2. The combination oi' the grooved concave section C, thc teeth I), provided with flanges d, and the bolts JOSEPH ALLONAS.

Witnesses l Joan MYERS, H. D. KEITH.

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