US546577A - Jonathan boothman - Google Patents

Description

(ModeL).

Patented Sept; 17, 1895.

' FIG-.1.

Fig.5.

JONATHAN BOOTHMA N, OF MANCHESTER, ENGLAND.

CUTTER FOR NAIL MAKINGAND DRIVING MACHINES.

SPECIFICATION forming part of Letters Patent No. 546,577, dated September 17, 1895. Application filed. May 11, 189{l. Serial No. 51a9 odem To all whom it mayconcern: I

Be it known that I, JONATHAN BOOTHMAN,

that a portion of the parallel wire is severed slantwise, so as to leave the nail pointed. In such a machine there is a fixed cutter having two grooves, and opposite thereto is a reciprocating cutter having a single groove. The stroke of the reciprocating cutter (which is operated by a cam) is such that its groove is in juxtaposition first with one groove and then with the other groove of the fixed cutter. In one position the groove in the fixed cutter and that in the reciprocating cutter together form a passage for the reception of the end of the continuous length of wire. Part of the wire is held by the groove in the fixed cutter and part by the groove in the sliding cutter. When the latter slides past the former, it takes with it the short length destined to form the nail (which is severed and pointed by the cutting-edges of the fixed cutter) and brings it to the second groove of the fixed cutter, through which works the driver to drive the shaped nail into the work held underneath. The reciprocating cutter thus acts simply as a holder and conveyer of the In the drawings, Figure 1 is a sectional front elevation through the cutter-box, showing the acting end of the fixed cutter as seen when the reciprocating or carrying cutter is removed. A represents the continuous length of wire. B represents the driver. Fig. 2 is a sectional plan through a: y of Fig. 1 with the reciprocating cutter in the position in which it receives the wire from which the nail is to be cut. Fig. 3 is a transverse section through line w'yof Fig. 2. Fig. etshows side elevation of the middle sections of the fixed cutter. Fig. 5 is a plan showing the mode I adopt of securing the tool or cutter in thereciprocating cutter-box.

In all the figures the same letters of reference refer to the same parts.

0 is the cutter-box, which holds the fixed cutters and which is provided with a through passage 0, in which the reciprocating cutterbox D slides to and fro.

Referring first to the fixed cutter, the side sections ct aare cut away at a a on their inner faces adjacent to the center section b, in order to form the two sides of the grooves to receive the wire. The third side of each groove is formed by the center section b, which is so set that its front face lies in the same plane as the faces of the side sections. One edge b of the end face of the center section forms the cutting-edge, which points the nail as it is carried past the said cuttingedge by the travel of the reciprocating or carrying cutter. The center section b is simply a prismatic bar, and to sharpen the cutting-edge b it is merely necessary to withdraw it and grind the front edge or face.

' The upper section 0 is a square bar, the under edge 0' of which acts as a cutting-edge to sever the length of wire destined to form the nail from the continuous length of wire while the nail. is being borne forward to the drivinggroove by the stroke of the reciprocating or carryingcutter. To sharpen the cutting-edge of the section 0, it is merely necessary todisplace it longitudinally loy'pushing it forward, when a fresh length of the cutting-edge comes into action. When all of one edge is worn off, the bar is turned over a quarter-turn, presenting a fresh square edge. The bar being square has four such edges, which last along time before the bar need be replaced or reground.

The side sections a are preferably made double-ended 0r reversible. The grooves in the opposite ends are made of different sizes, so that one set of side sections may be used for two sizes of wire.

As may be seen in plan in Fig. 2, the side sections a are recessed into the cutter-box O. The center section is made a good driving fit, so that when driven up it keys the side sections and prevents longitudinal or transverse displacement. The fore end 0 of the upper section 0 projects through a square hole in the front of the cutter-box. A pinchingscrew (Z, passing through the bottom of the cutter-box and taking against the under side of the middle section b, prevents the sections 1) and c from shifting.

The present method of securing the grooved tool in the reciprocating cutter-bar is by fitting it accurately into a dovetailed groove. This, however, presents obstacles to ready renewal.

I secure the grooved tool 0 in a recess undercut at c by means of a nut e and clamping-screw a The nut is undercut at c and as it bears with a square edge at 6 against the cutter-holder the tightening of the screw 0 causes the nut e to securely clamp the tool in the bar.

What I claim as my invention, and desire to secure by Letters Patent, is

1. In a fixed cutter for a nail cutting and driving machine the combination of the two side sections a a each notched to form a groove for receiving the nail with a removable center section b substantially as and for the purpose set forth.

2. The combination of the side sections a a the center section b and the top section 0 the whole forming a fixed cutter for a wire nail cutting and driving machine substantially as set forth.

3. A combination cutter for a nail cutting and driving machine having reversible side sections provided with grooves at both ends for receiving two sizes of wire substantially as set forth.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

JONATHAN BOO'IIIMAN.

Witnesses:

G. P. ROWLEY, W. J. Nonwoon.

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