US621832A - Method of and apparatus for manufacturing headed pins - Google Patents

Description

No. 62!,832. Patented Mar. 28, I899. G. W. LEE.

ME'ILHOD OF AND APPARATUS FOR MANUFACTURING HEADED PINS, .&c.

(Application filed Oct. 7, 1898.)

(No Model.)

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GEORGE WV. LEE, OF BINGHAMTON, NEXV YORK.

METHOD OF AND APPARATUS FOR MANUFACTURING HEADED PINS, &c.

SPECIFICATION forming part of Letters Patent No. 621,832, dated March 28, 1899.

Application filed October '7, 1898. Serial No. 692,889. (No model.)

' Apparatus for Manufacturing Headed Pins for Screws, Rivets, and the Like, of which the following is a specification.

My invention relates to an improvement in the method of and apparatus for forming headed pins from blanks of metal, the said pins being intended for use as rivets, screws, and the like.

One object of my invention is to provide an improvement in the method of manufacturing headed pins in which the metal which forms the blank is displaced in a direction perpendicular to the face thereof to form a pin to which the surrounding portion of the blank forms the head;

A further object is to provide means for carrying out this method.

A further object is to provide an apparatus for forming headed pins in which means are provided for determining the length of the pin and in which means are provided for ejecting the headed pin from the machine after it has been formed from the blank.

A further object is to provide means whereby headed pins may be formed with heads of much larger diameter, if so desired, than has hitherto been possible by the well-known method of forming the headed pins from wire.

In the accompanying drawings, Figure 1 represents a face view of a blank of disk form. Fig. 2 represents an edge view of the same. Fig. 3 represents a top plan View of the headed pin. Fig. 4 is a side View of the same. Fig. 5 represents a side View of a headed pin with the pin portion threaded to.

form a screw. Fig. 6 is a View, partially in vertical central section, of a press for forming the headed pins, a blank being shown within the seat in the platen of the press and the plunger being represented as being raised away therefrom. Fig. 7 is a detail vertical central sectional viewshowing the plunger depressed and the headed pin formed; and Fig. 8 represents a detail vertical central sectional view with the plunger raised and the sists of a cam D, carried by the yoke and provided with a suitable handle d.

The platen B extends vertically through the bed-plate A of thepress and may be removed therefrom when it is desired to replace it by another platen. The platen B is provided with a shallow seat I), which is of such shape and size that it will engage the periphery of the blank E, from which the headed pin is to be formed. The said seat in the present instance is of circular form, and the blank is a disk.

The platen B is provided with a screwthreaded socket Z) of considerable diameter, leading from its bottom upwardly a considerable distance toward its top. .A vertical hole 19 leads downwardly from the center of the seat Z) into the screw-threaded socket Z). This hole I) is made of the diameter which it is desired to have the pin which is to be formed from the blank E.

The plunger 0 consists of an upper section 0 and a lower section 0, having a screwthreaded engagement with the upper section. A lock-nut c has a screw-threaded engagement with the lower portion a of the plunger and serves to lock the said lower portion in any desired adjustment. The bottom face of the lower portion 0 of the plunger is shaped so as to enter the seat bet the platen B and snugly fit within the walls of the seat, so that when the proper amount of pressure is brought to bear upon the said plunger a portion of the metal of the blank E within the seat is caused to flow downwardly into the holeb without permitting the blank to extend laterally. The depth of the hole 19 from the seat downwardly may be adjusted so as to regulate the length of the pin portion of the headed pin by means of a vertically-disposed rod F. This rod F is provided with a collar f within the recess 1), and the portion of the rod below rod F at all times at the limit of its downward movement. A lock-nut g engages the screwthreaded portion of the plug G and serves to lock the plug in any required adjustment.

After the headed pin has been formed it may be ejected from the platen by the following means: A rock-lever H is pivoted to a bracket h, depending from the bed-plate A of the press, and one arm h of the rocking lever is caused to engage the lower portion of the rod F, so that when the other arm 7L2 of the rocking lever is depressed the lower portion of the rod F will be forced upwardly through the plug G and the upper portion of the said rod will be forced upwardly through the hole b thereby lifting the headed pin out of the platen.

It is to be understood that the upper end of the rod F may be made of any desired shape, so as to produce a rounded, pointed, flat, or other shape to the end of the pin portion of the headed pin. It is also to be understood that the platens may be provided with seats I) of any desired shape and size to form different styles of heads for the headed pins and that the holes 11 leading from the the said hole if the bottom face of the plunger 0 were left perfectly plain. To produce'a more finished looking top face to the head, I provide the bottom face of the plunger with a slight teat or projection 0 directly over the hole b IVhile I have shown a hand-press in the accompanying drawings, I wish it understood that this form of press was simply used as an illustration to show a means for operating the plunger, it probably being preferable to use a power-press in general practice, because of the greater amount of pressure which could be obtained by the use of such power-press.

It is evident that slight changes might be resorted to in the form and arrangement of the several parts Without departing from the spirit and scope of my invention. Hence I do not wish to limit myself strictly to the structure herein set forth; but

hat I claim is 1. The herein-described method of shaping cold metal consisting in forcing the metal composing the blank to flow inwardly in a direction away from the periphery and thence directing it laterally away from the blank, substantially as set forth.

2. Means for eonfininga piece of metal edgewise to prevent its expansion, a support for the piece of metal provided with a hole leading away from the face of the support and means for exerting pressure upon the face of the piece of metal and for directing the metal into the hole to form a pin integral with the metal.

In testimony that I claim the foregoing as my invention I have signed my name, in presence of two witnesses, this 27th day of September, 1898.

GEORGE XV. LEE.

Vitnesses: FREDK. HAYNES, O. S. SUNDGREN.

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