Improvements in Drawing Compasses.
Year: 1892

page_text: Date of Application, 26th May, 1892
Complete Specification Left, 22nd Feb., 1893-Accepted, 1st Apr., 1893
PROVISIONAL SPECIFICATION.
Improvements in Drawing Compasses.
I, THOMAS JACKSON of 131, Hyde Park Road, Leeds, in the County of York,
Lecturer on Engineering do hereby declare the nature of this invention to be as.
follows:-
My invention consists in using a separate and adjustable sheath (of a form as
hereinafter described) for the needle, in conjunction with a holder of the usual split
form suitably modified and bored to receive it. The sheath (which may be made
from a piece of brass or other suitable wire or material) is properly bored to receive
an ordinary sewing needle, and is split from the end at which the hole in it is largest
to within a short distance of the other end, at which the hole is very small in:
diameter to prevent shake of the needle in use. When the sheath, with the needle.
in it, is properly placed in the needle-holder leg of the compasses, the tightening of
the clamping screw of the holder fixes both the sheath and the needle contained by
it. When the clamping screw is slackened the needle may be readily adjusted,.
either together with the sheath or relatively to it.
My invention permits of being modified to suit other forms of needle holders of
compasses.
COMPLETE SPECIFICATION.
Improvements in Drawing Compasses.
I, THOMAS JACKSON, of 131, Hyde Park Road, Leeds, in the County of York,
Lecturer on Engineering do hereby declare the nature of this invention and in
what manner the same is to be performed, to be particularly described and ascer
tained in and by the following statement :-
My invention consists in using, in drawing compasses, a separate and adjustable
socket or sheath for the needle, in conjunction with a needle-holder-compasses-leg
of suitable form and bore. The socket or sheath (Fig. A.) made of brass, electrum,
or other suitable material, is suitably bored to receive an ordinary sewing needle
and is split from the end at which the hole in it is largest to within a short distance
of the other end, at which the hole is very small in diameter to prevent shake of
the needle in use. When the socket (with the needle in it) is properly placed in
position in the leg of the compasses (Fig. B.) the tightening of the clamping screw
of the holder fixes both the adjustable socket and the needle contained by it..
When the clamping screw is slackened the needle and socket may be readily
adjusted in position to suit the length of the other leg (i.e. pen, pencil, or divider
point) of the compasses.
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 :-
In drawing compasses, a separate adjustable socket to hold the needle, the said
socket being split down the middle for a portion of its length and so arranged with
respect to the needle-point leg of the compasses as to permit of its being readily

page_text: adjusted in its position therein to suit the length of the other leg of the compasses,
while the clamping of the socket in the leg of the compasses also firmly secures the
needle in the socket.
Dated this 20th day of February 1893.