Year: 1897

page_text: I, JOHN WILLIAM SETTEN, of 36, George Street, Saint Pauls, in the City of
Birmingham, Manufacturer, do hereby declare the nature of this invention to be as
follows:-
This invention relates to drawing compasses generally, but more particularly to that
class of compass in which an ordinary lead pencil, pen, or their equivalents is used.
The said invention consists in a simple and efficient device for rigidly affixing the
said pencil or pen to the one leg of the compass.
In existing drawing compasses various means have been used for the attachment
thereto of the lead pencil or its equivalent, but in every case the said means has
either been too complicated and too expensive in its production, to constitute a good
marketable article, or it has been defective in its grip, the pencil having a lateral
displacement.
Now this invention is an extremely simple grip which will hold the pencil or its
equivalent positively rigid. The same consists of a open ended barrel or socket part,
formed at the extreme lower end of the short leg of the compass, of a sufficient
length to form a good bearing and of such a diameter as to accommodate the standard
sizes in lead pencils and pens. The direction of the bore of the said socket is
approximately vertical, and its cross sectional shape is cylindrical. The metal of the
walls of this socket or barrel upon the outer side is slightly thicker than at any other
part, and a screwed hole is formed transversely therethrough, within which a rotating
set screw having a milled head works; the end of the same projecting into the hollow
interior of the barrel or socket. To the end of this set screw, so as to lie
longitudinally within the said socket, is swivelly connected a gripping plate, the
same extending the full length of the socket and being of a concave or semi-circular
figure in cross section, its purpose being to grip onto the pencil or its equivalent,
inserted into the said socket, and to rigidly clamp it in position against the inner
face of the socket and the inner face of itself. The loose connection of the gripping
plate to the end of the set pin is a very simple one; the said end is slightly reduced,
a piercing formed within the said plate, and the latter fits onto the former and is
loosely rivetted; a hole or gap being formed through the side of the barrel opposite
the axis of the set screw, wherethrough a tool can be inserted for the purpose of
rivetting, or the displacement of the metal of the set screw end.
Thus, the clamping screw carries, crossly mounted upon its end, a concave or semi-
circular shaped gripping plate, which grips onto the pencil when set up and clamps
it within the barrel. The said gripping plate also prevents the possibility of the set
screw being withdrawn and lost.
11.
1011
1
1100

page_text: An Improved Drawing Compass.
I, JOHN WILLIAM SETTEN, of 36, George Street, St. Pauls, in the City of
Birmingham, 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 relates to drawing compasses generally, but more particularly to
that class of compass in which an ordinary black lead pencil or its equivalent is used.
The said invention consists in a simple and efficient device for rigidly affixing the
said pencil or pen to one leg of the compass.
In existing drawing compasses various means have been used for the attachment
thereto of the lead pencil, or its equivalent, but in every case the said means has
been either too complicated or too expensive in their production to constitute a good
inarketable article, or it has been defective in its grip, the pencil having a lateral
displacement.
Now this invention is an extremely simple grip which will hold the pencil or its
equivalent positively rigid.
In the accompanying drawings the invention is clearly illustrated; Fig. 1 repre-
senting an elevation of a complete compass having the invention applied to its pencil
leg, Fig. 2 an enlarged sectional view of the leg terminal and grip, Fig. 3 a transverse
horizontal section of Fig. 2 upon the dotted line, and Figs. 4, 5, and 6, the parts of
the grip separate. The said grip comprises an open-ended barrel or socket-part, a
rotating set screw, and a gripping plate. The said open-ended socket or barrel-part
which is marked 3 is formed at the lower end of the short leg a² of the compass a,
and is of a sufficient length to form a good bearing for the pencil or pen, and of such
a diameter and bore as to accommodate the standard sizes in lead pencils and pens.
The direction of the bore c of the said barrel is approximately vertical and its cross
sectional shape cylindrical. The metal of the walls of this socket or barrel a³ upon
the outer side c² is slightly thicker than at any other part, and a screwed hole c' is
formed transversely therethrough, within which a rotating set screw d, herein before
mentioned, which has a milled head d², works; the inner end d' of the shank d³ of the
said screw projecting into the hollow interior or bore c of the barrel or socket. To
the end of this set screw d, so as to lie longitudinally within the bore of the said
socket, is swivelly connected a gripping plate e, made preferably from sheet metal,
the same extending approximately the full length of the said socket and being of a
concave or part-circular figure in cross section.
The purpose of this gripping plate e is to grip onto the pencil or its equivalent g
inserted through the bore of the socket, and to rigidly clamp it in position against
the inner concave face g² of the barrel's bore and the inner face e² of itself.
The loose connection of the gripping plate e to the end d of the set screw is a
very simple one; the said end is slightly reduced, a piercing e³ is formed within the
gripping plate, and the latter is fitted onto the former and loosely rivetted; a hole or
or gap h being formed through the inner side wall of the barrel opposite the axis of
the set screw wherethrough a tool can be inserted for the purpose of rivetting-up or
displacing the metal of the set screw end (*.
Thus the clamping set screw carries crossly mounted upon its end, which is
disposed within the bore of the barrel, a concave or part-circular shaped gripping
plate, which grips onto the pencil or its equivalent when set up and clamps it within
the barrel's bore.
The breadth of the gripping plate e is sufficient to cause its edges to almost abut
against the face of the bore of the barrel, which prevents the gripping plate's
rotation with the set screw.

page_text: The permanent connection of the gripping plate to the set screw prevents all
possibility of the set screw being withdrawn from its screw box and lost.
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 :-
First. In a drawing compass, the combination with the long leg carrying the
centre point, of a short leg a² having a barrel part a³ at its lower extremity, the said
barrel part having a hollow bore or a concave seating and a screwed hole c³ a set
screw d working within the screwed hole of the barrel part, and whose inner end
projects into the barrel's bore, and a concave or part circular-shaped gripping plate e
swivelly connected upon the end of the set screw, substantially as described.
Second. In a drawing compass, the combination with the short leg a² of a barrel
part a³ located at its lower extremity and having a vertical bore ca concave seating g²
a transverse screw box c³ and a hole or gap h formed within and around it, a set
screw d working within the said screwed hole and whose end protrudes into the
barrel's bore, a concave or part-circular gripping plate e swivelly connected to the set
screw's end and of a breadth sufficient to prevent it rotating within the barrel's bore,
and a gripped media g, substantially as described.
Dated this 12th day of January, 1898.
W. P. THOMPSON & Co.,
11, Burlington Chambers, New Street, Birmingham.
Also of Liverpool, London and Manchester, Agents for Applicant.