US556589A - Machine for making wire nails - Google Patents

Description

(No Model.)

G. SGHULTZE.

MACHINE FOR MAKING WIRE NAILS- No. 556,589. Patented Mar. 17, 1896;

UNITED STATES VATENT OFFICE.

CHARLES SOHULTZE, OF BROOKLYN, NEW YORK.

MACHINE FOR MAKING WIRE NAILS.

SPECIFICATION forming part of Letters Patent No. 556,589, dated March 17, 1896.

Application filed August 12, 1895. Serial NO- 553,994. (N0 model.)

T0 or whmn it may concern.-

Be it known that I, CHARLES SoHULTzE, a citizen of the United States, residing at Brooklyn, in the county of Kings and State of New York, have invented an Improvement in Machinery for Making WVire Nails, of which the following is a specification.

Nails have been made of wire both round and prismatic, and in some instances prismatic wire has been twisted in the formation of nails, so that such nails approximate the form of screws and partially revolve while being driven, and of course such nails hold more strongly than plain nails because they cannot be easily withdrawn.

Difficulty has heretofore been experienced in forming the twisted wire nails because the operation of twisting has been separate and distinct from the manufacture of the nail and has increased the expense of manufacture.

In my present improvements the prismatic wire is twisted in the act of feeding the same to the heading mechanism,whereby a separate twisting operation is avoided. In carrying out this improvement I apply to any ordinary nail-machine in which there is a feedingclamp, holding-jaws and a header, a twisting device composed of a die having a twisted hole through which the wire passes, and the wire is pushed through this twisted hole in the feeding operation, so that when it reaches the holding-dies it is ready to be headed and then subsequently to be out off and is complete and ready for use.

In the drawings, Figure 1 is a diagram illustrating a nail-machine and the place in which my improved twisting-die is located. Fig. 2 is an elevation of the twisting-die; and Fig. 3 is a plan view in larger size, showing the surface of one side of the twisting-die.

The holding-jaws A are adapted to be opened and closed, as in nail-machines, and the header ]3 is adapted to be reciprocated so as to strike up the head of the nail against the surface of the holding-jaws A, and the feed-clamp O is adapted to grasp the wire and carry the same forward to feed the wire D to the holdingjaws, and such feed-clamp O is drawn back over the wire to take a fresh hold at the time that the holding-jaws A clamp the wire and the head is being formed. These parts being common in nail-machines do not require further description herein. 1, however, remark that the nail is cut off, after being headed, by any suitable cutter, which at the same time points the nail. I have represented such a cutter at E.

My improved twisting-dieF is made of two parts and the one part is advantageously fastened permanently to a cross-bar G, through which is an opening for the free passage of the twisted wire. The lower part 2 of this die F is represented with screws 3 for fastening such part 2 of the die to the cross-bar G,

prism the opening through the twisting-die is triangular, and if the wire is four-sided the opening corresponds thereto; but instead of the opening or recesses being straight they are made with a twist, so that the two recesses form substantially a prismatic twisted hole, and the angle of inclination is to correspond to the angle of inclination in the twist that is given to the wire, and of course such angle of inclination cannot be too steep; otherwise the wire would be buckled between the feedcla'mp and the twisting-die; and it is to be understood that a lubricant may be applied to the wire as it passes through the twistingdie, and that when the feed-clamp is moved forward toward the twisting-die the wire D is carried thereby and pushed through the opening in the twisting-die, and in this operation the twist is imparted to the wire, so that when the holding-jaws A grip the wire near the advancing end the wire of the nail has received the proper twist and the projecting end of the wire is upset by the header and spread to form the head of the nail. During this operation the feed-clamp C is drawn back the proper distance for the length of another nail, and when the holding-jaws A are opened the feed-clamp O is again moved toward the twisting-die and the wire twisted and the headed blank is free to rotate as the feed takes place, and the wire is projected beyond the cutter E the proper length for the nail. Such cutter E is closed to cut off the wire and form the point of the nail and usually a sufficient length of wire is allowed to project from the holdingjaws A for forming the head of the next nail, and such holding-j aws A close upon the wire and the head is formed upon the wire by the header B and the operations are repeated.

By adjusting the screws 5 and 6 the opening through the twisting-die may be made wider or narrower and the angle of twist given to the wire can thereby be slightly varied, and it will be apparent that the twisting-die can easily be changed upon the nailmachine so as to adapt the same to different sizes or shapes of wire without the other portions of the machine being materially altered.

I claim as my invention 1. The combination with the feeding-clamp, holding-jaws and cutting and heading devices, of a two-part stationary die with inclined recesses in its faces for twisting a prismatic wire as it is forced through the die, and mechanism for adjusting the two parts of the twisting-die to Vary the twist in the nail-wire, substantially as specified.

2. In a nail-making machine, the combination with the feeding, holding, heading and cutting mechanism, of a stationary twistingdie between the feeding mechanism and the holding mechanism for imparting to the prismatic wire a twist as it is fed through the twistin g-die to the heading and cutting mechanism, substantially as set forth.

Signed by me this 8th day of August, 1895.

CHARLES SOIIULTZE.

\Vitnesses:

GEO. '1. PINCKNEY, S. T. ITAVILAND.

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