US166423A

US166423A - Improvement in machines for shaping the heads of metal screws

Info

Publication number: US166423A
Authority: US
Publication date: 1875-08-03
Anticipated expiration: 1892-08-03

Description

I M. SPENCER.

Machine for Shaping the Heads uf Metal Screws. ,No.16'6,423.

Patented Aug. 3,1875.

j m'inessas.

UNITED STATES PATENT FFICE.

CHRISTOPHER M. SPENCER, OF HARTFORD, CONNECTICUT.

- I IMPROVEMENT IN MACHINES FOR SHAPING THE HEADS 0F METAL SCREWS.

Specification forming part of Letters Patent No. 166,423, dated August 3, 1875 application filed December 7, 1874.

To all whom it may concern:

Be it known that I, CHRISTOPHER M. SPENCER, of Hartford, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements pertaining to Screw-Making Machines, of which the following is a specification, reference being had to the accompanying drawings, where Figure 1 is a top View of a machine embodying my said improvements. Fig. 2 is a side elevation of the same, which I will term I a front view. Fig. 3 is a view of the same in vertical cross-section, on the plane at 00, look- ?ing in the direction denoted by the arrow as. "Fig. 4 is a crosssection view on the same plane, but looking in the opposite direction.

The machine, as a Whole, is intended for making what are commonly called machinescrewsthatis, screws for fastening metallic parts together. The invention is an attachment to or part of such machine for forming and fashioning the periphery of the heads of the screws to almost any desired shape, as round, square, hexagon, octagon, &c.

The letter a denotes. the base; I) b, ways for the block 0, carrying the horizontally-rotating .ool-stock d; e e, the standards of the headstock, in which is hung the hollow shaft f, wtatcd by a belt running on the pulley g. The stock h is fed through the shaft f, and caused to rotate with it by appliances which z'orm no part of the present invention. The

rotary tool-stock d has sockets i for different tools as mills for cutting down the body of the stock to the desired size, and dies for outie; the screw-thread, which can be brought -eear successively upon the stock by the rotation and longitudinal motion of this toolstock. One of these sockets bears upon the end of the stub or rod j the ways-block k, in which the tool-stock I has longitudinal movement. This tool-stock Z bears the tool m, secured in place by screw n. From this toolstock extends the tappet a, practically a part of the tool-stock I, kept in contact with the periphery of the rotating former 19 on the shaftf by the spring 1'. If the former p is circular it will cause the tool m to cut a round head on the screw 0; if the former is square, the tool m cuts a square head. The former shown in the drawings is of about the right shape for causingthe tool to cut a hexagon head, and the shape of the former can be varied to cut heads of almost any shape. The letter 8 denotes the cutting-off tool held in the tool-stock t, which has transverse motion on the base a in ways 20. This tool is used to sever the finished screw from the stock at the proper time.

I claim as my invention 1. The combination of the hollow rotating stock-feeding shaft f, the rotating former p, and the vibratory tool-stock Z, all substantially as shown and described.

2. The combination of the hollow stockholding shaft f, the rotating former p, the ways-block k, the t00l-stock l, and the tool m, all substantially as shown and described.

3. The combination of the slide 0, rotating head cl, ways-block 7c, reciprocating tool-holder Z, and rotating former 1), all operating substantiaiiy as shown and described.

CHRISTOPHER M. SPENCER.

Witnesses:

WM. E. Smonns, O. A. GRIFFIN.