USRE291E - Improvement in cutter-fingers of harvesters - Google Patents

Description

UNITED STATES JOHN H. MANNY, OF

ROCKFORD, ILLlNOlS.

IMPROVEMENT IN CUTTER-FINGERS OF HARVESTERS.

Specification forming part of Letters Patent No. 9,675, dated April 19, 1853; antedated December 9, 1852;

Reissue No. 291, dated January 2, 1855.

To all whom it may concern:

Beit known that I, JOHN H. MANNY, of Bockford, in the county of Winnebago and State of lllinois, (formerly of Waddar'ns Grove, in the county of' Stephenson and State aforesaid,) have invented a new and useful Improvement 4in the Cutting Apparatus of Machines for Mowing Grass or Grain, of' which the following is a full, clear, and exact description, reference being had to the accompanying drawings, which form part of this specification, and in which- Figure 1 is a view in perspective ofV two of' the ngers of a mowing-machine attached to the linger-bar, and showing in red lines the serrated cutter which plays back and forth through them. Fig. 2 is a view in perspective of the upper side ofthe under halt' of the iinger detached. Fig. 3 is a similar view of the under side of the upper half of' the finger. Fig. 4 is a side elevation of' the finger and a section through the finger-bar, and Fig. 5 is a transverse section of' the finger at the line oc .fr of Fig. et.

1t is well known that the cutting apparatus of mowing-machines are not unfrequently rendered inoperative by the entanglement of wiregrass around the cutter a'nd the lodgment of it, together with straw, grain, and grit, in the openings through the lingers which forni the race or guide ofthe reciprocating cutter. To keep the critter and ngers clear of' all such impediments has lon g been a desideratum, which it is the object ot' my invention to secure.

Each finger, as represented in the drawings, consists of two distinct parts, but may be made in one piece. rlhe lower part, A, is made the strongest and supports the upper part, B. rlhe finger-bar C and the front and rear ex'- tremities of the fingers may be made in any convenient manner, as my improvements relate to that part of the linger through which the cutter plays and those parts immediately adjacent thereto. I shall therefore conne my description principally to those points i'n which the improvements are made.

The first of' these improvements consists in narrowing the finger just in front of the finger bar, where the stock of' the knife plays, by a recess, o, on either side. rllhe upper corners of the recess in the lower half of the linger are chamfered or beveled off, as shown at d, leaving a ridge, e, in the lniddle, so that, except at the middle of the finger, any ber, grass, gte., that may be drawn under the knife will drop down on either side, leaving the bearing on the middle so narrow that the grass will be cut off' or detached by the motion of the sickle-stock, and thus it will be impossible for wire-grass to accumulate, as it does in this part cf fingers of other constructions.

lf' a recess be made in the shank of' the linger beneath the knifestock, instead of the ridge e, and projections from the under side of the knife-stock be arranged to play through these recesses, the fingers will be kept clear until a roll, bunch, or quantity of the wire-grass happens to enters the recess, when the resistance of the grass fo displacement or being cut will projections on the under side of the stock of the knife, and very often the knife itself. By the peculiar shape I have given this part of the finger all the advantages of a transverse groove on the top of the finger are secured, and at the same time the entrance of' rolls and the accumulation of' wiregrass are eifectually guarded against.

The under side of the shankf of the upper part, B, of' the finger immediately over the part of' the lower tingerjust described may be made of corresponding shape.

The upper part of the finger has the general form of an openisosceles triangle, with a shank, f, projecting outward fromthe middle of' the base, the part of the inside of the triangle adjacent to the apex being filled or solid. The part of the lower halt of the finger corresponding to the triangle of the upper part is also of triangular shape, but the triangle is more acute. gle overhang the ed ges h of' the lower triangle, so that the grass must be inclined .when borne by the knife against the fingers in such man'- ner that it will receive a double drawing cut, the slant of the edge of lthe knife causing the draw in one direction and the slant of' the grass against the upper and lower triangles causing the draw in the other direction, as seen by the portion of' the inclined stem t' in Fig. 5.

Many other advantages result from this construction ef the finger; but it is deemed unnecessary to specify them, as they are sufficiently obvious.

be so great as to endanger the breaking of the Hence the sides q of the upper trianj What I claim as my invention, and desire to 1. Constructing the lower part of the finger or the upper, or both, with a recess on either side in front of the finger-bar, whereby the clogging of the cutting apparatus is etfeetually prevented, as herein described.

2. Constructing` the Enger so that the sides of its upper half will overhang those ot' its lower half, the cutter playing between the two,

substantially as herein set forth.

3. Beveling the upper corners of the shank ofthe lower part of the finger so as to form a cutting-edge, e, thereon, in the position and for the purpose described.

In testiinonT whereof I have hereunto subscribed my name.`

JOHN H. MANN'Y.

Witnesses: I

P. H. WATSON, F. G. DE FONTAINE.

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