Improvements in the Manufacture of Headed Pins and the like.
Year: 1899

page_text: COMPLETE SPECIFICATION.
Improvements in the Manufacture of Headed Pins and the like.
1, GEORGE WASHINGTON LEE, of Binghamton, in the County of Broome, State of
New York, United States of America, Manufacturer, do hereby declare the nature of
this invention and in what manner the same is to be performed, to be particularly
(lescribed and ascertained in and by the following statement:---
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 inuch 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 disc form,
Figure 2 represents an edge view of the same,
Figure 3 represents a top plan view of the headed pin,
Figure 4 is a side view of the same.
Figure 5 represents a side view of a headed pin with the pin portion threaded to
form a screw.
Figure 6 is a view, partly in vertical central section, of a press for forming the
headed pins, a blank being shown within the seat in the platen or matrix of the press
and the plunger being represented as being raised away therefrom.
Figure 7 is a detail vertical central sectional view showing the plunger depressert
and the headed pin formed, and
Figure 8 represents a detail vertical central sectional view with the plunger raised
and the ejector raised, indicating the manner of removing the headed pin from the
platen or matrix.
The table or bed plate of the press is denoted by a, its uprising yoke by b and its
legs by c. A platen or matrix & is inserted in the bed plate a and a vertically
reciprocating plunger e is mounted in the uprising yoke b, which plunger is provided
with a suitable operating means which, in the present instance, consists of a cam f
carried by the yoke and provided with a suitable handle g.
The platen or matrix & extends vertically through the bed plate of the press and
may he removed therefrom when it is desired to replace it by another platen or
[DQ27

page_text: matrix. The said platen or inatrix d is provided with a shallow seat h which is of
such shape and size that it will engage the periphery of the blank from which the
beaded pin is to be formed. The said seat, in the present instance, is of circular
form and the blank is a disc.
The platen or matrix d is provided with a screw threaded socket j of considerable
diameter leading from its bottom upwardly a considerable distance towards its top.
A vertical hole leads downwardly from the centre of the seat h into the screw
threaded socket j. This hole is made of the diameter which it is desired the pin
to have which is to be formed from the blank i.
The plunger e consists of an upper section and a lower section m having a screw 1
threaded engagement with the upper section. A lock nut n has a screw threaded
engagement with the lower portion of the plunger and serves to lock the said
lower portion in any desired adjusted position.
The bottom face of the lower portion m of the plunger is shaped so as to just enter
the seat of the platen or matrix d and fit within the walls of the seat so that
when the proper amount of pressure is brought to hear upon the said planger, a
portion of the metal of the blank i within the seat is caused to flow downwardly into
the hole & without permitting the blank to extend laterally.
The depth of the hole 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 o. This rod o is provided with a collar p within the recess j and the
portion of the rod below the said collar extends through an adjusting plug q. which
has a screw threaded engagement with the recess. As this plug 7 is screwed up-
wardly, the rod o is thereby forced upwardly in the hole toward the seat h. A
spring extends between the collar p and the upper end of the recess j tending to
keep the rod o at all times at the limit of its downward movement. A lock nut &
engages the screw threaded portion of the plug q and serves to lock the plug in any
required adjusted position.
After the headed pin has been formed it may be ejected from the platen or matrix
by the following means. A rock lever is pivoted to a bracket a depending from the
bed plate of the press and one arm of the rocking lever is caused to engage
the lower portion of the rod o so that, when the other arm w of the rocking lever is
depressed, the lower portion of the rod o will be forced upwardly through the plug
and the upper portion of the said rod will be forced upwardly through the hole
thereby lifting the headed pin out of the platen or matrix.
It is to be understood that the upper end of the rod o 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 piu. It is also to be understood that the platens or matrices may
be provided with seats h of any desired shape and size to form different styles of heads
for the headed pins and that the holes leading from the seats may be made of
different diameters to forin different sizes of pins.
The pin portion of the headed pin may be screw threaded as shown in Figure 5 to
form a screw or it may be used plain, as a rivet for instance.
When the blank is compressed to cause the metal therefrom to flow down into and
fill up the hole k, an irregular depression would be left upon the upper face of the
blank over the said hole if the bottom face of the plunger e 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 projection x directly over the hole k.
Having now particularly described and ascertained the nature of my said 'inven-
tion and in what manner the same is to be performed, I declare that what I
claim is:-
1. The hereindescribed 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 laterally away from the blank substantially as set forth.
2. Means for confining a piece of metal edgewise to prevent its expansion, a

page_text: 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 to force
a portion of the metal into the hole to form a pin integral with the metal.
Dated this 28th day of March 1899.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.