US857710A - Cutting-tool. - Google Patents

Description

V PATENTED JUNE 25, 190 w. 1). ALLEN & G. A. JOHNSON.

GUTTING TOOL. APIfLIOATION FILED SEPT. 7. 1906.

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PATENTED JUNE 25, 1907. W. D. ALLEN & G. A. JOHNSON.

CUTTING TOOL. APPLICATION FILED SEPT. 7. 1906.

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UNITED STATES PATENT OFFICE.

WILLIAM D. ALLEN AND CUsTAvE A. JOHNSON, OF NEW HAVEN, CONNECTI CUT, ASSIGNORS To MARLIN FIRE ARMs COMPANY, OF NEW HAVEN, CONNECTICUT, A CORPORATION OF CO NECTICUT.

CUTTING-TOOL.

Specification of Letters Patent.

Patented June 25, 1907.

Application filed September 7.1906. Serial No- 333,586.

To all whmn it may concern.-

Be it known that we, WILLIAM D. ALLEN and GUsTAVE A. JoHNsoN, citizens of the United States, both residing at New Haven,

New Haven county, Connecticut, have invented certain new and useful Improvements in Cutting-Tools, of which the following is a full, clear, and exact description.

Our invention relates to improvements in tools, and particularly for automatic taper cutting. I

Our former patent No. 831,316, dated September 18, 1906 shows the principles of the machines with which our present inven tion is particularly intended for use. It is. what is commonly known as an automatic cutting machine, in which the stock is a wirelike rod fed through the head of the machine. The cutting tools are carried usually by a turret rotatable on a vertical axis and movable longitudinally toward and from the stock. Other cutting tools are also sometimes provided, for instance, for cutting-off operations, which tools are moved transversely of the work aXis.

Our former patent No. 834,877 dated. November 6, 1906, illustrates a taper cutting tool embodying the principles of this invention. The improvements in this application reside principally in the means of connection between the cutter and saddle blocks and in a central abutment for steadying the tip of the stock during the cutting operation.

Figure 1 is an end view of a tool embodying the improvements of our invention, Fig. 2 is a longitudinal section of the same taken on the plane of the line XX, Fig. 1, looking showing a fragment of the end of the stock after the cutting operation. Theoutline of the tool is also shown dotted in a position which it occupies as it moves to the po sition shown in full lines after the cutting operation. Fig. 3 is a bottom plan. view of the tool, Fig. 4 is a detail view of one of the connecting links, Fig. 5 is a detail view of the other connecting link, Fig. 6 is a detail view of a bearing-block forming art of the connection between the links, Eig. 7 is a detail I longitudinal sectional view of the central abutment for the stock.

The body 1 of the tool has a shank 2, which is adapted to be removably secured in the usual turret. The cutter-carrying block 3 and a saddle-carrying block 4 are mounted in guide-ways in the end of the tool in which they are adapted to slide toward and from the axis of the tool.

The cutter 5 and saddle 6 are suitably secured in the carrier blocks 3 and 4. The two carrier blocks are normally pressed outwardly by means of a suitable spring (not shown). Their outward movement is lim ited by adjustable screw stops 7 and 8. The carrier blocks are connected by levers 9 and 10 pivoted to the body of the tool by screws 11 and 12, respectively. A screw 13 passes through the double arm end 14 of the lever 9, and also through the bearing nut or block 15, which fits loosely in the notch 16 in lever 10. The screw 17 which takes into the cutter block 3 has its shank adapted to the notch 18 in link 9, while the screw 19 which takes into the saddle block 4 has-its shank adapted to the notch 20 in lever 10. By means of this construction the two carrier blocks move in and out in their guide-ways simultaneously, and there is little opportunity for the parts to bind. The construction being simple, there is little likelihood of the parts being thrown out of adjustment or being clogged with dirt or chips from the work.

The stock 21 is fed through the head of the machine in the usual manner and the end given a tapering cut, as shown at 22, by means of the tool. In our former application, the saddle corresponding to saddle 6is relied upon to steady the work during the cutting operation, but in some cases it is found desirable to give a further support to the stock. For this purpose, we have provided a central abutment, whose recessed end 23 receives a small tip 24 formed on the end of the stock. The body 25 of this abutment is guided in a longitudinal recess in the body of the tool and has a shank-26 guided in the sleeve 27, which is clamped in the shank of the tool by the screw 28. The spring 29 located between the body 25 of the abutment and the sleeve 27 holds the abutmeillt in its proper position relative to the too As the tool is moved toward the stock during the cutting operation, the abutment remains stationary and holds the tip of the stock rigid. When the tool is retracted, the

stock is released from the abutment after the tool passes to the right of the position shown in Fig. 2.

The advantages of this construction will be apparent to those acquainted with this art.

WVhat we claim is:

1. In a taper cutting tool, a body, radial guide-ways in said body at opposite sides of the center, a member mounted to slide in each guide-way, a pair of levers pivoted to the body near the margin thereof on separate fulcrums, a pin and slot connection between the inner ends of said levers, and a pin and slot connection between each lever and one of the members.

2. In a taper cutting machine, a body and a shank, both provided with a central, longitudinal passage, radial guide-Ways in said body at opposite sides of the center, a mem-' ber mounted in each of said guide-Ways, means to simultaneously move both of said members toward and from each other, a spring-pressed abutment mounted to slide in said passage normally engaging the inner faces of said members, and a smaller central projection therefrom extending flush with the outer faces of said members, said projection provided with a recess at its extremity to engage the stock.

WILLIAM D. ALLEN. G. A. JOHNSON.

Witnesses:

M. M. SHEEHAN, F. M. DANNENFELSER.

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