US246257A - Wood-bending machine - Google Patents

Description

(No Model.) I 2 Sheets-Sheet I. D. N. WEBSTER.

' WOOD BENDING MACHINE. No. 246,257. Patented Aug. 23,1881.

(No Model.) v 2 Sheets-Sheet 2.

D. N. WEBSTER.

WOOD BENDING MACHINE. I

'5" Patented Aug. 2-3, 18.81.

NITED STATES PATENT 0FFICE..

DENNIS N. WEBSTER, OF GENEVA, OHIO.

WOOD-BENDING MACHINE.

SPECIFICATION forming part of Letters Patent No. 246,257, dated August 23, 1881.

Application filed February 23, 1881. (No model.)

To all whom it may concern:

Be it known that I, DENNIS N. WEBSTER, a citizen of the United States, residing at Goneva, in the county of Ashtabula and State of Ohio, have invented certain new and useful Improvements in Machines forBendingWood; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being bad to the accompanying drawings, and to the letters or figures ofreference marked thereon, which form a partof this specification.

My invention relates to a machine for bending wood for scythe-snaths or other forms where different curvatures are required; and the novelty consists in the construction, arrangement, and adaptation of parts, as will be more fully hereinafter set forth, and specifically pointed out in the claims.

The object of the invention is to give to a bending machine the facilities, by molds, springs, and power, by means of which differential curvatures are imparted arbitrarily to forms adapted for useful and important purposes.

For convenience, I will describe the device as applicable to the formation of scythesnaths; but it will be understood that the mechanism is equally useful in forming implements for other useful arts.

In the accompanying drawings, which form a part of this specification, Figure l is a horizontal view, partially in section; Fig. 2, a similar view, showing the loop-rods and springs; Fig. 3, a front elevation, partially in section; and Fig. 4, a detail view of the mold.

Referring to the drawings, in which similar letters of reference indicate like parts in all the figures, A represents a base table, in which is provided a curved slot, at, which terminates in a curved groove, (1, formed in a mold or die, D, working in guides under the frame. This table has a horizontal curved bearing-surface, A, which corresponds with the curved slot as and is adjacent thereto. This bearing-surface A is adapted to give a horizontal curvature to the blank, and the force is impelled through the means of the levers shown, in which a lever, B, is pivoted at I) to the table and held by a metal frame, a, and has a right-angled holding-arm, b. Operating beyond the pivotal point bis a flexible lug or washer, N, which traverses a portion of a lever, O, fulcrnmed at c, and having a curvature corresponding to the form of the portion A. The piece of sawed or turned wood is placed in such juxtaposition with the levers and bearing-surface A that by the forcible manipulation ot'the leverO the blank is made to conform to the curvatures desired in one direction, and is held over the curved slot at until a vertically-operating frame, E, working in guides upon proper standards secured to the table or base A, operates to force the part down through the slot at by means of the rigid end rods, e, and link-rods e, the latter of which exert a constant force to hold the form in the mold D d by reason of the springs e The vertically-acting frame E is held in position to give a positive reciprocating motion, through slotsfin metal frames F, upon the standards.

The operation is obvious. The blank receives its first curvature by means of the force and conformation of the levers B O and part A. It is then forced down into the mold D d, and the link-rods and springs give it the shape due to the form of the mold, which may readily be removed at will. The spring 00 serves to throw the levers back out of contact with the slot or, and further adds as a bearing to assist in giving the proper curvature to the blank.

' What I claim as new isl. A scythe-snath-forming machine having horizontally-curved recesses to receive the blank and levers to force the blank into the form described by the curves, and having a removable die, with a vertically-curved recess, corresponding with the horizontal curves, into which the partially-formed snath is forced by proper means, the two operations imparting both horizontal and vertical curves to the snath, as set forth.

2. The combination of the frame E and bearings F f, the link-rods 6, end rods, 6, and springs c with the hearing A, levers B 0, slot or, and mold D d, as and for the purposes set forth.

In testimony whereof I affix my signature in presence of two witnesses.

M. F. BRETT, BURT BRETT.

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