USRE8395E - Improvement in straw-cutters - Google Patents

Description

T. E. MARABLE.

- Assignor to J. G. BLAKE 8: P. T. Youm Straw-Gutter.

N0. 8,395. Reissued Sept. 3'; i878.

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UNITED STATES PATENT OFFICE.

THOMAS E. MARABLE, OF PETERSBURG, VIRGINIA, ASSIGNOR TO JAMES (J. BLAKE AND PETER YOUNG.

IM PROVEMENT IN STRAW-CUTTERS.

Specification forming part of Letters Patent No. 191,008, dated May 2.2, 1877; Reissue No. 8,395, dated September 3, 1878; application filed June 13, 1878.

To all whom. it may concern:

Be it known that I, THOMAS E. MARABLE, of Petersburg,1 in the county of Dinwiddie and State of Virginia, have invented a new and useful Hay and Straw Gutter; and I do hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawings, forming part of this specification, in which- Figure 1 represents a side elevation of the straw-cutter; Fig. 2, a longitudinal vertical section of the same; and Figs. 3 and 4 detail views of the cutting-blade.

Similar letters of reference in the accompanying drawings denote the same parts.

The object of this invention is to produce for the public an improved hay and straw cutting machine, which shall be simple in construction, convenient of operation, cheap, and durable, and shall require less power to operate it than is required in the machines heretofore in general use for these purposes; and to this end my invention consists, first, in an improved knife, which can be more easily and perfectly sharpened than heretofore; secondly, in the reenforcement of said knife by a bar or rod operated by the knife handle or lever; thirdly, in combining with the knife and its supporting arms or levers a movable stop or gage, which will, when the knife rises, assume a proper position in front of the end of the feed-table, gage the length of hay to be cut, and when the knife descends will move away from said position and allow the out hay to fall; and, lastly, in the subordinate combination and elements of construction and operation, hereinafter more specifically set forth.

In the drawings, F is the feed-table; f, an upright frame attached to the discharge end of the feed-table; A, the cutting-knife; b, the arm or lever by which the knife is operated; a, an arm to which the lower end of the knife is articulated; d, a stiff rod or barparallel to the knife and articulated to the lever b and arm a c c, guide-bars, behind which the knife moves; and g, a gage, rigidly affixed to the arm 0, and adapted to ga-ge'the length of hay or straw to be out off by each stroke of the knife.

The knife is made of a thin piece of plate- Steel, with straight cutting-edge. The blade is of uniform thickness, and is beveled on one side from c to 0 ()n the other side it is cut or notched from o to v with a series of notches parallel to each other, but inclined to the straight cuttingedge, as clearly shown in Fig. 3, the notches increasing in depth from the point or line 0 to the edge 12 If the notches extended entirely across the blade they would weaken it, so that it would easily break; but by leaving the metal plain from o to the back edge, the blade is rendered sufficiently strong, although quite narrow. This blade is readily sharpened by grinding the beveled side, and if the notches rust or become worn away they may easily be deepened with a file. Although this blade is made very thin to facilitate its operation, yet it is prevented from doubling or buckling by reason of the stiff bar, which keeps it always at the proper tension. The arrangement of the bar just outside of the knife and parallel thereto prevents the bar from obstructing the operation of the machine. The attachment of the knife to the two levers I) c not only gives the blade a peculiar drawing cut, but causes it to pass back and forth across the end of the feed-table by a simple vertical movement of the operating-lever.

When the knife is raised the gage is thereby automatically brought squarely across the passage-way of the hay or straw, forming a stop to hold the feed in the proper position for a new cut; and when the knife is brought down to cut off the feed the gage is thereby moved out of the way and the out feed allowed to fall from the machine.

The gage may be secured to the arm by one or more rivets or other fastenings, as shown; or it may, if preferred, be adjusted upon the bar 61, or any other rod attached to the lever b, whereby it will be caused to operate by the movement of said lever, and without the necessity of any guides to control its course or.

position.

I claim as my invention- 1. As a new article of manufacture, the knife A, adapted for hay and straw cutting machinery, having a thin blade with straight serrated cutting-edge, said blade'bein g beveled on one side of the cutting-edge and provided on the other side with a series of notches or grooves, parallel to each other but inclined to the cutting-edge, extending from o to v, and decreasing in depth from the edge back to the line where they run out, substantially as herein shown, and for the purposes set forth.

2. The combination of the knife and operating-arm b with the stiff rod or bar d, arranged outside of the knife-blade, substantially as described.

3., The combination, with the levers b and c, of the knife A and gage supported and operated by said levers, substantially as described.

4. The combination of the knife, levers b and c, and stiff bar (1, substantially as described.

5. The combination of the levers b and c, the knife, the bar 11, and the gage 9, arranged between the bar 01 and the knife, substantially as described.

THOMAS EDWARD MARABLE.

Witnesses ALEXANDER DONNAN, ALEX. DONNAN, J r.

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