Year: 1899

page_text: Date of Application, 17th Feb., 1899
Complete Specification Left, 31st May, 1899-Accepted, 17th Feb., 1900
DAVID WOOD COCHRANE, Goldsmith. 33. Oakhurst Grove. E. Dulwich, S.E..
do hereby declare the nature of this invention to be as follows:--
A self-acting safety pin to be made of gold, silver, or any other suitable metal,
which, on simply pushing into silk, cloth, cotton or any like material opens
and closes of itself by means of a spring at one end, and guiding and fixing
arms or points at the other. The spring end of this pin has what is technically
called a tight or closed spring, an ordinary safety pin has an open spring which,
in using, requires to be opened and closed. This self-acting safety pin opens
and closes of itself when pushed into or withdrawn from the cloth or other
material on which it is used.
The point end of the pin, where the point rests, is in the form of a pear-
shaped loop and is bent under where the ends of the loop meet, the loop coming
in between the pin proper and the bar of the pin, and it is at this junction of
the wires at the pointed end of the pear-shaped loop where the point of the pin
rests, the point being guided by the sides of the loop, falls into its place and
rests between two smaller adverse points or teeth, one on each side near the point,
and are placed in or near the centre of the loop, so that when the pin has
taken sufficient hold of the material the point of the pin falls into its place, and
the two adverse points coming behind the material which is on the pin, prevents
it from coming out.
The point of the pin itself does not project so much as a sixty-fourth part
of an inch, and is well protected by the curvature at the end of the pin where
the point rests.
000
DAVID W. COCHRANE,
33, Oakhurst Grove, E. Dulwich.
DAVID WOOD COCHRANE, Goldsmith, 33, Oakhurst Grove, East Dulwich, S.E.,
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:-
A self-acting safety pin to be made of gold, silver, or any other suitable metal,
called self-acting because, simply on pushing the point end of the pin into
any material such as silk, cotton, cloth or any like material this pin opens and
CD 0.71

page_text: closes of its own accord, by means of what is technically called a tight or closed
spring, an ordinary safety pin requiring to be opened and closed when using.
The construction of the pin is as follows, as will be seen by the accompanying
drawings.
Fig. 1. Represents the pin made from one continuous piece of wire.
Fig. 2. Represents the pin made in gold, the loop and adverse points being
soldered, the action and effect being the same in both figures.
Figs. 3 & 4. Represent the pin at right angles from Figs. 1 & 2. The
point end of the pin, where the point rests, is in the form of a pear-shaped
loop (a) (Fig. 1) and is bent backwardly and inwardly, where the ends of the
loop meet (b) (Fig. 1), the loop coming in between the pin proper and the bar
of the pin, the shorter end of the wire being coiled one and a half times round
the bar of the pin at (d Fig. 1) and is then split to form the adverse points (c)
which are then bent towards the remaining end of the wire. Then at a given
distance from the loop according to the size of the pin required, the spring
is fashioned so that it is always closed as previously stated, after the spring
has been coiled, the remainder of the wire forms the pin proper, is cut the
right length and pointed, the point projecting just sufficient to enter any
textile fabric when pushed against it, when the spring opens and closes auto-
matically, and the adverse points coming in behind the material on the pin,
prevents it from coming undone.
To undo the pin, the bar is lifted just enough to clear the adverse points from
the material which is on the pin and withdrawn.
This safety pin although it cannot come undone of itself, yet it is more easy
to fix and undo than the ordinary safety pin and can be adapted to brooches,
badges, and the like.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what
I claim is:-
1-A safety pin having a closed spring as previously described.
2-A safety pin having a closed spring at one end, and two adverse points
at the other, between which adverse points the point of the pin rests.
3-A safety pin having a closed spring at one end and adverse points at
the other, (as previously described,) having a backwardly and inwardly inclined
loop at the pointed end of the pin, the sides of which loop acting as guides to
convey the point to its normal position.
Dated this day the 7th of February 1900.