US12900A - Stave-machine - Google Patents

Description

UNITED STATES PATENT OFFICE.

DANIEL DRAWBAUGH, OF EBERLYS MILLS, PENNSYLVANIA.

STAVE-MACI-IINE.

Specification of Letters Patent No. 12,900, dated May*22, 185,5.

To all whom it may concern:

Be it known that I, DANIEL DRAWBAUGH, of Eberlys Mills, in the county of Cumberland and State of Pennsylvania, have invented a new and Improved Machine for Cutting Staves; and I do hereby declare that the following is a full, clear, and exactdescription of the construction and operation of the same, reference being had to t-he annexed drawings, making a part of this specication, in which- Figure 1, is a vertical longitudinal section of my improved machine, the plane of section being through the center. Fig. 2, is an end view of the same. Fig. 3, is a detached perspective view of the stationary concave, and the vibrating bed.

Similar letters of reference indicate corresponding parts 1n the several figures.

The nature of my invention consists in the combination of a stationary concave, vibrating bed, curved knife, and pressure roller, constructed, arranged, and operating, as will be fully shown hereafter, for the purpose of cutting staves from a block in a smooth and perfect manner.

To enable others skilled in the art to make and use my invention, I will proceed to describe its construction and operation.

A, A, represent two uprights, the lower ends of which are secured to a proper base, B.

On the upper parts of the uprights there is suspended upon pivots, (a), (a), a vibrating bed, C, the pivots, (a), (a), passing through eyes, (b), (b), at the back end of the bed, C, an eye, (Z9), being at each end of the bed-one eye and one pivot are shown grooves, (o), (o), (c), in the front edge of the bed, C, as clearly shown in Fig. 3.

F, is a vertical sliding frame, the lower end of which works loosely on a rod, G, the ends of which rod work on ways, (d), (d), attached to the inner sides of the uprights, A, A, one way to each upright. At each side of the frame, F, there is attached a plate, Gr. The upper ends of these plates are connected by pivots, (e), to the front part of the vibrating bed, C, see dotted lines,

ig. l.

H, is a lever, having its fulcrum at (f), and its inner end connected by a smaller lever, I, to the lower part of the frame, F, as shown in Fig. l.

I', is a knife, the ends of which are secured by bolts, (g), to the upper parts of the uprights, A, A, see Figs. 1, and 2. The edge of the knife is somewhat curved, and is placed a little inward ofthe top of the concave, as shown in Fig. l, the space between the edge of the knife and concave, being equal, o-f course, to the desired thickness of the staves. The knife may be adjusted, or set farther in or out from the concave by means of the bolts, (g), and staves of a `greater or less thickness, cut as desired.

J, is a pressure roller placed directly over the top of the concave, D, and adjoining the knife, I, see Figs. l, and 2. K, is the axis of the pressure roller, J, and said axis works in bearings, L, L, attached to the uprights, A, by pins, (7a.), (7L), one of which is shown by dotted lines in Fig. l.

M, M, are springs which bear against the bearings, L, and keep the friction roller against the knife, see Figs. l, and 2.

Operation. The block, N, from which the staves are cut, is placed upon the vibrating bed, C, see dotted lines, Fig. 1, one edge of the block bearing against the concave, the vibrating bed is first moved downward by raising the outer end of the lever, H, in order to allow the edge of the block to bear against the concave. The outer end of the lever', H, is then pressed downward, and the vibrating bed is raised, and the block forced against the knife, I, which cuts 0H a stave corresponding in thickness to the space between the knife and concave. The pressure roller, J, keeps the stave against the knife, and prevents the staves from splitting when nearly cut from the block, and also causes them to be cut in perfect shape corresponding to the concave.

The ribs, or guides, E, work in the grooves (c), in the edge of the beds, C, cause the bed to operate evenly, and without any unnecessary play.

I do not claim separately any of the parts of the above machine, but,

What I claim as my invention and desire straight as required for staves heading 0I, 10 other purposes substantially as herein described, the bar D being changed or reversed as described.

DANIEL DRAWBAUGH.

Vitnesses:

SAMUEL BITNER, JOHN E. ROTH.

Images