US72292A - levi heywood - Google Patents

Description

@uiten fates betrat @fitta `LEVI HEYWOOIL'OF GARBNER, MASSACHSETTS. Letters Patent No. 72,292, dated December 17, 1867.

IMPROVEMENT IN MACHINES FOR BENDING WOOD.

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Be it known that I, LEVI HEYWOOD, of Gardner, in the county of Worcester, and Stateot` Massachusetts, have invented certain Improvements in Apparatus for Bending and Shaping Timber, of which the following is a full, clear, and exact description, reference being had Atothe accompanying drawings, making part of this specification, in which- Figure 1 represents a piece'oftimberbent around and shaped by the employment of a mould or form of common construction.

Figure 2 is my improved mould or apparatus for shaping timber, to be used in connection with the said f mould or form.

Figure 3 represents the two moulds with a piece of timber clamped therein. Figure 4 is a section on the line a: :i: of iig. 3. v

Figure 5 is a section on the line y y of iig. 3.

Figure 6, detail to be referred to.

, My invention relates particularly to certain improvements in apparatus for bendingand shaping timber for v the backs of chairs, &c., and consists in an auxiliary mould, or apparatus tobe used in connection with the mould or form commonly used for this purpose, the central portion of the timber being rstbcnt in tbc ordinary mould, after whiehthe auxiliary mould is securely clamped thereto, and the lower or end portions ofthe timber are bent as required, the two operations being performed with great facility and in a reliable manner.

To enable others skilled in the art to understand and use' my invention, I will proceed to describe themanner in which I have carried it out. I i

In the said drawings, A representsa mould, of the form seen inV figs. I and 4, in which a piece, a, of wood,

' for the back of a chair, Ste., after being steamed, is bent, by means of a chain or otherwise, the mould being fastened immovably to a bench or table, and the ends ofthe piece a being brought down, so as to snugly fit it, after which it is clamped thereto, and the mould A, being then released from the table,and turnedover, the lower portions or ends -of thetimber are fitted to an auxiliary mould, B, of the form seen in figs. 2 and 5, the mould B being first fastened securely to the bench or table. The lower portions of the timber are now kept in place between the moulds A B, by turning buttons b, secured by screws o to the mouldB, and clamping them against a projection or abutment, d, formed at the ends Aof the mould B. C are flexible metal straps, the upper 'l v ends of which are riveted to the abutments d, while their lower ends are made in the form of al shoe, e, as seen in iig. 4. A spring-lever, D, ofthe form seen in iig. G, is employed to bring the ends of the timber down wit-hin the lower curved portion ofthe mouldB into a position seen inviig. 4, a shoulder or projectiomf, on thc extremity cf the lever, fitting over and bearing against the side '7 of each button b. Each of the elastic metal straps C is brought down by the lever D simultaneously with the ends ofthe timber, which is prevented from springing up by means of clamps (not shown.)

By the employment of apparatus similar to that above described, any timber crpiece of wood for a variety of purposes may be bent and twisted, without fracturingits fibres, in such manner as to permanently retain any desired shape.

. O'Zaz'm.

What I claim as my invention, and desire to secure by Letters Patent, is-f The moulds A and B, in combinationwith the lever D,or its equivalent, all constructed to operate in the manner substantiallyr as and for the purpose set forth. v

LEVI HEYWOOD.

Witnesses:

N. W. STEARNS, P. E. TEseHnMAcBEn.

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