Improvements in and connected with the Manufacture of Safety Pins and Curtain Pins.
Year: 1892

page_text: Date of Application, 19th Nov., 1892
Complete Specification Left, 19th Aug., 1893-Accepted, 23rd Sept., 1893
PROVISIONAL SPECIFICATION.
Improvements in and connected with the Manufacture of Safety Pins
and Curtain Pins.
I, ARTHUR GRAFTON HERBERT, of Dean Street, Birmingham, Safety Pin-
and Curtain Pin Manufacturer, do hereby declare the nature of this invention to..
be as follows:-
This invention has reference to those safety pins and curtain pins in which the
pointed arm can be entered into the cap from either side thereof the said pointed
arm lying in a trough part of the cap when the pin is closed. In order to prevent
the pointed arm of the pin being accidentally pushed directly through the cap from
one side to the other without engaging in the trough part of the cap there is a
central partition in the cap extending into the said trough shaped part thereof.
Heretofore when this partition has been made long enough to enter the said trough
part of the cap it has been customary to make the partition of wire or of a separate
piece of metal from the cap and to fix it to the cap by solder or other means; or
when the partition and the cap have been made together from a single sheet metal
blank the partition owing to the form of blank and tools employed has not been made
to enter the trough part of the cap which makes the pin imperfect as the pointed
arm is then liable to be pushed through the cap from one side to the other without
engaging in the trough part. By employing a blank and tools of special form as
herein described I am enabled to make the partition enter the trough when made
in a piece with the cap, thus making a more perfect cap than heretofore.
In carrying out my invention I provide a sheet metal blank which is somewhat
of an oblong form corresponding with the said cap when opened out into a flat
state. This blank has a projecting part at one side or a projecting part at both
sides which projecting part or parts forms or form the said partition when the cap
is finished. By means of a punch which in cross section is oval corresponding with
the inside of the cap before the cap is closed on to the pin I force the said blank
through an oblong die which has the effect of bending or raising the sides of the
blank towards each other to form a trough and simultaneously bending the two end
parts of the blank towards each other so as to form the cap. There is a small
recess in one side or in both sides of the punch and a slightly projecting part in one
side or in both sides of the die so that as the blank is forced through the die and
raised as above described the said side projecting part or side projecting parts of
the blank is or are closed against the recess or recesses in the punch before the
trough shaped end part of the cap in which the pointed arm will lie is formed so
that when the cap issues through the die the said side projecting part or parts will
form the partition located within the trough shaped part of the cap as is required
in the finished pin.
The cap is closed on to the bent arm of the pin in the usual way.
Instead of raising the cap complete from the blank in one operation as above
described this may be performed in two or more operations but the former is
what I prefer.
D: 10th 1 of Noiember 1800
:

page_text: COMPLETE SPECIFICATION.
Improvements in and connected with the Manufacture of Safety Pins
and Curtain Pins.
I, ARTHUR GRAFTON HERBERT, of Dean Street, Birmingham, Safety Pin
and Curtain Pin Manufacturer, do hereby declare the nature of this invention and
in what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement :-
This invention has reference to those safety pins and curtain pins in which the
pointed arm can be entered into a cap from either side thereof the said pointed arm
lying in a trough part of the cap when the pin is closed. In order to prevent the
pointed arm of the pin being accidentally pushed directly through the cap from
one side to the other without engaging in the trough part of the cap there is a
central partition in the cap extending into the said trough shaped part thereof.
Heretofore when this partition has been made long enough to enter the said trough
part of the cap it has been customary to make the partition of wire or of a separate
piece of metal from the cap and to fix it to the cap by solder or other means; or when
the partition and the cap have been made together from a single sheet metal blank the
partition owing to the form of blank and tools employed has not been made to enter
the trough part of the cap which makes the pin imperfect as the pointed arm is then
liable to be pushed through the cap from one side to the other without engaging
in the trough part. By employing a blank and tools of special form as herein
described I am enabled to make the partition enter the trough when made in a
piece with the cap thus making a more perfect cap than heretofore.
I will describe my invention by referring to the accompanying drawings
on which.
Fig. 1 represents in elevation and in cross sectional plan a safety pin constructed
according to this invention;
Fig. 2 is a frout elevation and a sectional elevation of the punch and die which
as hereinafter described I use in forming the cap from a sheet metal blank;
Fig. 3 is a plan of the said die ;
Fig. 4 is a side elevation and a cross sectional plan of the said punch ;
Fig. 5 shews the said punch with the cap thereon as when the cap has been
forced into the die by the punch;
Fig. 6 shews the blank for forming the said cap;
Fig. 6 is a modified form of the said blank;
Fig. 7 is a side and front elevation and plan of the partly finished cap in the form
in which it leaves the punch and die;
Fig. 8 shews a part of the safety pin with the cap placed thereon ready to be
closed on to the pin by the tools illustrated by Figs. 9 and 10.
The same letters of reference indicate the same parts in all the figures of the
drawings.
a is the usual pointed arm of the safety pin and b is that arm to which the cap C
is fixed this cap C having the trough part c in which the pointed arm a of the pin
lies when the pin is closed. c is the central partition of the cap extending into the
trough shaped part cl as stated above.
In carrying out my invention I provide a sheet metal blank by preference of the
oblong form represented by Fig. 6 corresponding with the cap C when opened out
into a flat state. This blank Chas a projecting part c² at one side which projecting
part forms the partition when the cap is finished; or as hereinafter described
and shewn by Fig. 6° the said blank may have a projecting part c³ ³ at both sides
so as to form the partition of double thickness of metal.
In order to form the sheet metal blank (Fig. 6) in to the cap C shewn by Fig. 7
with the partition centering the trough shaped part c¹ of the cap I employ a
punch D worked in a press and a die E. The lower end of the punch D is as

page_text: shewn in Fig. 4 oval in cross section corresponding with the inside of the cap
before the cap is closed on to the pin and the hole e in the die is as shewn in
Fig. 3 of corresponding oval form bell mouthed slightly at its upper side and pro-
vided with a recess in which the blank C will lie so as to keep the blank in the
proper position relatively to the hole e'. I place the blank C in the recess e* of the
die E as shewn by the dotted lines in Fig. 3 and then by means of the punch D
which it will be understood is carried and operated by a fly press or otherwise
suitably arranged I force the blank through the oblong hole e¹ in the die E which
has the effect of bending or raising the sides of the blank towards each other to
form a trough and simultaneously bending the two enlarged end portions of the
blank towards each other so that the cap issues through the die in the form
represented in Figs. 5, 7 and 8. There is a small recess d¹ in one side of the
blank D see Figs. 2, 4 and 5 so that as the blank C is forced through the die and
raised as above described the side projecting part of the blank is closed against
the recess d¹ in the punch before the trough shaped end part c¹ of the cap is formed
so that when the cap C issues through the die E the side projecting part will
form the partition located within the trough shaped part of the cap C as is
required in the finished pin.
The cap thus formed is then placed upon the bent arm of the pin and closed
thereon by means of closing tools such as shewn by Figs. 9 and 10 which are the
usual kind used for other safety pins and form no part of this invention. These
tools and the method of closing the cap on to the bent arm of the pin being well
known and forming no part of this invention require no description here.
When the blank is made with two side projecting parts such as c² c* shewn in
Fig. 6 then it will be understood that the punch D must in addition to the
recess d¹ have a similar recess on the opposite side for the projecting part to lie
in as the blank is being forced through the die E.
Instead of raising the cap C complete from the blank in one operation as above
described this may be performed in two or more operations but the former is what
I prefer.
My invention is applied to curtain pins similarly as above described with
reference to a safety pin.
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. In a safety pin or a curtain pin of the kind herein referred to provided with
a sheet metal cap into which the pointed arm can be entered from either side,
making the said cap in the manner herein described in a piece with the central
partition which latter enters the trough part of the cap and prevents the pointed
arm passing right through the cap without entering the trough substantially as
hereinbefore set forth.
2. The manufacture and sale of safety pins and curtain pins in which the central
partition of the cap is made from a sheet metal blank in a piece with the cap and
enters the trough part of the cap substantially as herein before set forth.
3. In the manufacture of sheet metal caps of the kind herein referred to for
safety pins and curtain pins, raising the sheet metal blank into the cap by means
of the punch D and die E in combination the punch D having the side recess d¹
into which the side projecting part of the blank is closed as the blank is passing
through the die and before the trough part c¹ of the cap is closed upon the punch
substantially as hereinbefore set forth.
Dated this 18th day of August 1802
CHARLES BOSWORTH KETLEY,
Agent for the Applicant.