US97030A - Improved chisel-holder for file-cutting machine - Google Patents

Description

vWILLIAM J. BIRDSALL, 0F NEWARK, NEW JERSEY.

Letters Patent No. 97,030, dated November 23, 1869.

-00H r IMPROVED CH-ISEL-HOLDER FOR FILE-CUTTING- MACHINE.

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

I, WILLIAM J. BIRDSALL, of the city of Newark, in the county of Essex, and State of New Jersey, have invented cert-ain Improvements in Holders for Chisels in Machines for Cutting Files, of which the following is a specification.

My invention relates to the manuel' of securing the chisel in the holder, and to the ina-nner of keeping cert-ain parts ot' the holder together, so as to prevent their being liable to be. jarred loose by their work.

The top of the holder is shown, in full size, in lFigline 1, and the under side in Figure 2.

Figure 3 is a side and an end View of a semicircular block, that is movable in the interior of the holder.

Figure 4 is an end view of the holder, showing the place and position of the semicircular block and the chisel.

Figure 5 is a side View, showing cach separate piece of the entire holder in its relative position.

Figure (5 is a horizontal view of the eccentric, the intermediate, and a section oi' the chisel.

Figure 7 is a fiat and edge View of the springs that secure the seniicircnlar to the other part of the holder.

Ihe outer case A cncloses the semic-ircular block B, the two tt-ing nicely together, so that the block can turn freely in the case, the springs d pressing on the cent-re line of the semicircular block B, bythe edges e.

'.lhe chisel c passes through the senlicircularblock, and is held firmly therein by the intermediate b, which is held tight thereto by the eccentric e.

The upright shaft f, turning in bea-rings in the block B, has the eccentric c on its lower end, and a leverhandle, g, on its top.

Attached to the semicircular block, with room to move where itpasses through the end of the case A, is a segment, h, that is shown as having holes, but which can be a ratch, its object being the retention of the pressure which the eccentric gives to the chisel.

By reference to the patent, No. 79,878, July 14,

1868, issued to Messrs. Thurston and Kearney, in

which the present applicant has become a partner, it will be seen that the semicircular bloc-k was held t0 the case by screws, the under side of the heads of the screws resting ou a curve, to'allow the turning of the semicircle in the case, and that the chisel was held to the block by a screw or screws. -Thc severe labor of the machine made it needful to frequently renew or repair the loosened screws. 'Ihat annoyance I obviatd by the above d'evices.

\Vhat I therefore claim, and desire to secure by Letters Patent, is-

1. Ihe combination of' the eccentric c, shaft f, intermediate l), lever-handle g, segment h, chisel a, and frame A, all constructed and arranged substantially as specified and shown. y

2. lhe combination of the springs d, semicircul'ar block B,'and frame A, in a tilecutting machine, in the manner and for the purpose shown.

. WILLIAM J. BIRDSALL.

Witnesses:

W. M. GOODING,

EDWARD GoLLvER.

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