US96458A - Improvement in machine for making chair-seats - Google Patents

Description

dinard' tapes A wat limine;

JOSEPH C. MCOORMICK, OF SMIOKSBURG HIMSELF AND `GEORGE STITELER, OF SAMEPLACE.

Letters Patent No. 96,458,

dated November 2, 1869.

IMPROVEMENT IN MACHINE FOR MAKING` CHAIR-SEATS.

The Schedule referred to in these Letters Patent and making part f the same.

f Figure 2 is a pian, one end of the machine having been broken away.

Figure 3, is a perspective view of one of the bits detached.

vThe object of this invention is to provide, for public use, a simple, convenient, and effective machine for cutting out and moulding curved seats for common wooden chairs.

In the drawings- A indicates the frame; y

B, the platform or'table, supported by the frame;

C, the cutter-heini;

1),' the driving-gear, belts, Snc.;v E, the head or graduated rest at the end of the table, in front ofthe cutter;

l, an elevated plaltbrm'a't the left side of the cutter, made removable, itpreierred; and

M M, the bits or cutters, fastened t the side of the 'cutter-head by a pivot-screw or rivet, Ir, and a slof, s, and set-screw, s', iu-the manner clearly shown in tig. 1.

i\l y invention relates solely vto 'the construction of the cuttilig-instrument, and the arrangement of the same with relatiol to the graduated head E, formed ofthe steps c, el, 2, &c., and placed transversely across the table at right angles with the vertical plane of the cutter. f

The cutter-head is a cam-shaped disk, having four (more or less) projections, m m. m2 m3, arranged around its perimeter, as seen in tig. 1,- with their left-hand edges bevelled olf.

lhe bits are attachedto the right-hand side of' these czun-slntped* projections, so that their cutting-edge projects beyond the abrupt or front 'edge of the projections;

.By-setting the screws s' at diii'erent points along the slots s,- the inclination ot the bits to the axisof the disk U may be adjusted, at pleasure, so that the bits wili cutinto' the wood more or less rapidly.

'lhe cutting-end of each bit is scalloped out onv theA left side, so as to leave a sharp,I curved edge, a a a a, as shown in iig, 3.

In practical operation, the-machine works as fol` lows:

One edge ofthe plank that is to become a chairseat is rested upon one ofthe steps e c, &c., or upon the platform, in front of the lower step, and the op,

posite edge, heldin the workmans hand, is brought down until the hits strike the fiat side ot' the plank, and cut to a suticient depth into it. The plank is then moved endwise a little, and'auother similar ont 4is made alongside of and parallel to the first, and so onuntil it has been scored in like manner from endA to end, when the wood between the cuts may easily be removed; or, if` preferred, in practical (nieration, the plank may be so gradually moved that thecutters will themselves remove all the wood to the depth ot' their cut as they perform their work. not leave the plank cut out properly on that side, its position may be changed, by resting its edgeon a different step, (higher or lower, and nearer to or' further from the'cutter-head,) and again going through the'process; and this may be repeated till the plank has become properly'moulded on that side. It may then be turned, and moulded on theopposite, until it has assumed the scroll-shaped form that adapts it to the oiiice it has to perform.

Having thus 'described my invention,

What I claim as new, and desire to secure by Let ters Patent, is

1. The bit, constructed in the form shown in tig. 3, having its cutting-edge scalloped out. on the left side, so as to leave a sharp, curved point, au, the rivethole 1', and transverse slot s, near thel widened end of the bit, and opposite the cutting-point, substantially as described. h v2. The rotating disk c, having the canrshaped projections m ml m2 m3,' with their lelt edges bevelled o,

in combination with the bit above claimed, substantially as described.

3. In connection with the cutter-head C, having the bits M, the iixedhead or rest E, having the steps c c e c, substantially as and for the purposes described. To theabove specification ofmy invention, I have signed my 11a-nd, this 17 th dayot'Jnne, 1869.

- J. C. BLIC-COR-MICK.v

Witnesses EDM. F..BnowN,

Unas. A. Partir.

, PENNSYLVANIA, ASSIGNOR T0 l,

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