An Improvement in Drawing Compasses.
Year: 1892

page_text: Date of Application, 11th Aug., 1892
Complete Specification Left, 15th Mar., 1898 Accepted, 15th Apr., 1896
πιοτμιτυ, και ημι, του
PROVISIONAL SPECIFICATION.
An Improvement in Drawing Compasses.
JAMES HENRY HOUGHTON of 48 Bankside View Roundhay Road Leeds,
Editor do hereby declare the nature of this invention to be as follows:-
In all school compasses the barrels are slit & the screw is arranged so as to
draw the two portions of the barrel together & thus the pencil is fastened in
position. In my invention the barrel remains intact & is sufficiently wide to allow
a pencil to go in easily; the screw works directly upon the pencil & thus holds
it in position.
Advantages claimed are
(1) It cannot be spoiled by the barrel being opened too much in putting in the
pencil, as is the case in ordinary compass.
(2) A great amount of time is saved as the pencil can be put into position in an
instant.
...
J. H. HOUGHTON.
COMPLETE SPECIFICATION.
An Improvement in Drawing Compasses.
I JAMES HENRY HOUGHTON of 48 Bankside View, Roundhay Road Leeds in
the County of York Editor 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 :-
In school compasses as hitherto constructed, the barrel for holding the pencil
has been slit down the outer side, and the parts on opposite sides of the slit
arranged to be drawn together by means of a screw, thereby holding the pencil in
position.
Now my invention consists in making the barrel of such a diameter, (say fonds
to ths of an inch), as to admit an ordinary school or drawing pencil, without
having to cut down or reduce the diameter of the pencil; and I make the barrel
portion intact, i.e. without any slit, but I arrange the screw so that it works or
presses directly on the pencil and thus holds it securely in position. One side
preferably the outer side of the barrel is formed with or as a boss or projection,
through which a tapped hole is made for the screw to work therein. Otherwise
the amount of metal bearing for the screw would be so small, that the threads
would be rapidly worn and stripped.
And in order that my invention and the manner in which the same is to be
performed may be more readily understood, I have annexed hereto the accom-
panying sheet of drawings which illustrate a school compass constructed in
accordance with my invention. Fig. 2 is a cross section on line A A Fig. 1.
a indicates the barrel, which as seen in Fig. 2 is intact (i.e. not split). The end
of the screw as shewn in Fig. 3, (which is a vertical section on line B B Fig. 2),
is somewhat enlarged, offering a larger biting surface and preventing the screw b
being completely withdrawn and lost. This thickening of the end is readily
accomplished, through the hole c drilled or cast in the opposite side of the barrel,
and the inner end of the tapped hole is countersunk as indicated at d, so as to
enable the screw 6 to be drawn back to facilitate the insertion of the pencil in the
barrel.
The advantages of my improved form of school compass are:-Rapidity of
TD 31

page_text: putting in and taking out the pencil; no cutting of pencils or packing to make
them fit the barrels; the screw cannot possibly get lost; and small bits of pencil
now thrown away can be used up.
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° A school or drawing compass having the barrel unsplit and a screw passing
through the side of the barrel and acting directly upon the pencil.
2° In school and other drawing compasses the formation of the barrel unsplit
and sufficiently large to receive an ordinary pencil without shaving, with one side
elongated to form a boss having a tapped hole passing through the same and
countersunk at the inner end, and carrying in said tapped hole a screw provided
with an enlarged inner end substantially as herein set forth or illustrated.
3° My improved school or drawing compass constructed substantially as herein
set forth or as shewn in the accompanying drawings.
Dated this 14th day of March 1892.
J. CLARK JEFFERSON,
2, East Parade, Leeds, Agent for Applicant.