US76351A - E d w a r p b - Google Patents

Description

EDWARD ROYON,- OF'PQUA,OH10.

Letters Palent No. 76,351, dated April "I, 1868.

MPROVEMENT irl 'SCREW-CUTTING MAGHiNE.

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T0 WHOM 1T MAY CONCERN;

Be it known thatl, EDWARD RoYoNfof PiqumMiami county, and State of Ohio, have invented a certain new and useful Screw-Cutting Machine; Vand'l do hereby ,declare the following to be a full, clear, and exact description thereof, reference being had to the accompanying drawings, making part of this specification.

My invention relates to machines for cutting screw-threaded bolts and nuts, and consists,irst, in Vconsti-noting u. set of dies in disk form,'capable of rotation, if necessary, and cut die-form in several places (differingin size) on the periphery, for thepurpose of adapting one set of dies to cut several sizes of bolts; second, in n peculiarconstruction 'and arrangement of the die-chuck, by which the jawsto which the dies are attached can be expandedvund contracted by the partial rotation of a part of the chuck, and be firmly retained in any desired position for the required depth of cut, the retaining-devices being capable of nice adjustment for dill'erent depths of' cut; third, in an improved device for holdingtaps for tapping nuts, Ste. vInthe accompanying drawings- Y l Figure 1 is a perspective view of a machine complete, embodying my invention, the dies and bolts for same being det-ached as shown.

Figures 2, `l, and 4, :ire detached views oi' portions of the die-chuck.

Figure 5 is a rear 4view of the chuck, with the jaws open. Y

Figure 6 is a rear view of' the chnelc, with the jaws closed, showing also the device for releasing the retainingmechanism. l

Figure 'i' exhibits theidevice for holding the taps.

A is the-frame of the machine, B the hollow shaft, C D the driving-gear, and E the dic-chuck, composed of the following parte, to wit, a permanently-attached head, F, diametricelly-divided clip G, concentric inside, and having opposing eccentric-arcsgg outside, sliding jaws H, revolving lring I, {provided with notches z',) and opposite eccentrie-ares i i, outside plated, dies K, and bolt L. A groove, f, is turned in the head for the reception of the clip G, which rotates within the notches L of the jaws H, the lips g g" tting into the notches z' of the revolvinglring. The ends of the jaws H are eccentrically curved to fit against the corre spending cuttingsz" i" of the ring. By a partial rotation of the ring 1, tue jaws and dies are contracted orv expanded at will, the aros it" serving to force thejaws in, and by a reversal of the clip Gr, as itis carried round with the ring, serving to force them out. The projecting pins E", fitting intocorresponding holes ,7c in the dies K, serve to adjust the dies, and the bolts L to secure them to thejavvs.

It. will be seen that the dies can be turned round to present different-sized euttingsfor different-sized bolts, The back ofthe ring I is notched, a, and" the head F is graduated, 1 2 3 4, to indicate the depth of cut. A plate, lili, notched at m and slotted at m', is fitted over the shaft B. A screw, N, is tapped into the head F, to receive the plate in4 any desired position, and a. tumbler, P, is pivoted'at p to the ring I, the lip p' being adapted to it the notch m. The tumbler is forced against the plate M by the action ofl spring Q. When the ring I is revolved, the tumbler slips into the notch m, and the jaws are retained in thatposition untilthe bolt is cut. To release this mechanism, 1 provide an incline-faced projection, p, on the tumbler, which, ou depression of Vlever R, engages the projection P, when, by o. slight rotation of shaft B, the tumbler is forced from the notch,

and the jaws H can be again expanded. By the adjustment of the plate M in the slot m, the tumbler can be made to drop into the notch in when the notch a is at either 1, 2, 3, or 4.

The lever R is kept up by a spring, S, and confined to a definite range of action. by the lip s on its shaft. Tis the sliding carriage, adapted 'to hold bolts or nuts. It is fitted with right and left-hand screws tt', to oper.- ate the jaws t" t'". W is the socket for holding taps, having bushes w for different-sized taps. The shank W slips into the hollow shaft B, andis confined by, the chuck-jaws H, the nut rv, when screwed to the shank W', serving to prevent displacement.A By means of the devices w w w', at, I enable my machine to be used for tapping nuts. l

I I claim herein as new, and of my invention- 1. As herein arranged and for the purpose explained, the hollow die-chuekE, having the permanenthead F, clip G, with opposite eccentric-arcs g g', sliding jaws H, notched revolving ring l, eccentric t" i, and plate J'.

2. The combination of the hollow shaft B, die-chuck E, jaws H, adjustable dies K, and bolts L.

The notched and adjustable plate M, and tightening-screw N, in combination with the tuAmAbler P, ing I, and spring 4. I claim, in combination withthe screw-threadin g machine herein described, the right and left screw tt',

jaws t`t, socket W, and nut X, all arranged as set forthn In testimony of which invention, I hereunto set my hand.

y EDWARD ROYON. Witnesses:

GEO. H. KNIGHT, JAMES H..- LAYMAN,

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