Improvements in Drawing Compasses.
Year: 1897

page_text: PROVISIONAL SPECIFICATION.
Improvements in Drawing Compasses.
We, LEOPOLD MYERS, of Charlotte Street Steel Pen Works, Charlotte Street,
in the City of Birmingham, l'en Manufacturer, and FRANCIS ROBERT BAKER, of
Hillside, Park Hill, Kenilworth, in the County of Warwick, Mechanical Engineer,
do hereby declare the nature of this invention to be as follows:-
This invention has reference to drawing compasses and consists of the herein
described improved means for holding various sizes of pencils and of the method
of making the compasses from sheet metal so that they will have a substantial
appearance.
In carrying out this invention the socket leg of the compass is formed of a
sheet metal blank which may be said to roughly resemble the letter V so that
when the two limbs are folded together they will form a leg of double thickness
of metal and the lower part will form a trough section socket for the pencil.
This trough part may be pierced for lightness if desired. The upper ends of
the two limbs of the V-shaped blank are pierced as eyes for the joint pin at the
top of the compass and the limbs are corrugated for strength. Within the trough
like socket we provide a gripping lever which at one end is jointed to the sides
of the trough and can be turned either to lie parallel with the pencil or outwardly
therefrom towards the other leg. This gripping lever carries a spring tongue
the end of which, when the lever is turned towards the pencil grips the pencil
securely in the socket. The lever is secured by engaging with one or other of
a series of teeth, notches, holes, pegs or the like formed on one side of the trough
and thus various sizes of pencils can be held. To remove or adjust the pencil the
lever has to be pressed sideways to disengage it from the teeth or the like of
the trough and then turned to the left the spring tongue off the pencil which
can then be adjusted in the socket and the lever again turned down for the spring
tongue to grip and hold the pencil in the socket.
The pointed leg of the compass is made from a sheet metal blank of an elongated
form about twice the width of the finished leg and having eyes
at the
top one at each side. By press tools or other suitable means the sides of the blank
are folded and closed over so as to bring the two ears in position side by side for
the joint pin and form the leg of a tubular form and so as to grip the separate
metal point at the lower end.
T
1007
CHARLES BOSWORTH KETLEY,
Agent for the Applicants.

page_text: We, LEOPOLD MYERS, of Charlotte Street Steel Pen Works, Charlotte Street,
in the City of Birmingham, Pen Manufacturer, and FRANCIS ROBERT BAKER, of
Hillside, Park Hill, Kenilworth, in the County of Warwick, Mechanical Engineer,
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 drawing compasses and consists of the herein
described improved means for holding various sizes of pencils and of the method
of making the compasses from sheet metal so that they will have a substantial
appearance.
We will describe this invention by referring to the accompanying drawing on
which Fig. 1 is a side elevation partly in section and Fig. 2 is a plan of drawing
compasses constructed according to this invention; Fig. 3 is a view of the socket
leg as seen when viewed from between the legs; in Figs. 1, 2 and 3 the lever
which fastens the pencil is represented as closed so as to hold the pencil in
position; Fig. 4 is a sectional side elevation of the socket part of the compasses
with the pencil removed and the lever turned up to its open position; Fig. 5
shews the sheet metal blank from which the socket leg is formed; Fig. 6 shews
the said blank after it has been pierced and raised; Fig. 7 is a separate view
of the socket leg; Fig. 8 is a side and front elevation and cross section of the
pointed leg of the compasses; Fig. 9 shews the sheet metal blank of which
the pointed leg is formed; and Fig. 10 shews separately in side and front eleva-
tions the lever pencil fastener of the compasses.
The same letters of reference indicate the same or corresponding parts in all
the figures of the drawing.
are
In carrying out this invention the socket leg A of the compasses is formed of
a sheet metal blank of the shape shewn by Fig. 5 which may be said to roughly
resemble the letter "V" so that after the two limbs a¹ a² of the
blank have been pierced and raised as shewn in Fig. 6 they
folded together as shewn in Fig. 7 so that they then form a leg of double
thickness of metal and the lower part forms a trough section socket a³ for the
pencil B. The upper ends of the two limbs a¹ a² of the V-shaped blank are, as
shewn in Fig. 6, pierced at a a³ as eyes for the joint pin C at the top of the com-
passes, and the limbs a¹ a² are, as shewn, corrugated for strength an outwardly
projecting longitudinal rib being raised along each of them. Within the trough
like socket a³ we provide a gripping lever D, shewn separately by Fig. 10, which
near one end is jointed at its sides d¹d to the sides of the trough a3 and can be
turned either to lie parallel with the pencil as in Figs. 1, 2 and 3 or so as to pro-
ject outwardly therefrom and from the socket (see Fig. 4) towards the other leg E
of the compasses. This gripping lever D is formed with a spring tongue d³ the
end d of which when the lever is turned towards the pencil as in Figs. 1, 2 and 3
grips the pencil B securely in the socket a³. The lever D is secured in this
position by engaging with one or other of the series of teeth notches holes tongues
or the like a formed on one side of the trough like socket a³ and thus various
sizes of pencils can be securely held. To remove or adjust the pencil B the lever D
has to be pressed sideways in the direction indicated by the arrow in Fig. 3 so
as to disengage the lever from the teeth a6 or the like on the trough like socket a³
and then the lever with its spring tongue d³ is lifted and turned about its
centres as shewn in Fig. 4 so that the pencil B will then be released and
can be adjusted in the socket a³ as required. When the lever D is turned down

page_text: again the end d* of the spring tongue D will take into and grip the pencil B and
when the lever D has been allowed to spring under one or other of the teeth or
notches a the pencil will be securely held in the socket as represented in Figs. 1,
2 and 3.
The jointing of the lever D to the socket part is by preference formed by the
lever D being made with side pins which take into corresponding holes a7 a³
which are pierced in the socket like leg A.
The pointed leg E of the compasses is made from a sheet metal blank of an
elongated form as represented by Fig. 9 which is about twice the width of the
finished leg and has ears e¹³ at the top one at each side pierced with holes for
the joint pin C. By press tools or other suitable means the sides e³e of the blank
shewn in Fig. 9 are folded and closed over so as to bring the two ears e¹ e³ in position
side by side for the joint pin C and form the leg E of a triangular form as shewn
in Fig. 8 the sides of the lower end e of the blank being closed round upon and
so as to grip the separate metal pointed part eo of the leg as shewn in Figs. 1, 2
and 8.
Having now particularly described, and ascertained the nature of our said
invention, and in what manner the same is to be performed, we declare that what
we claim is:-
1. In drawing compasses, making the pencil leg with a trough like socket in
combination with a spring gripping lever jointed in said socket and provided
with a spring tongue adapted to grip and hold the pencil in the socket when the
lever is turned down towards the pencil and which releases the pencil when
the lever is turned outwardly therefrom, one side of the said socket being provided
with teeth or the like to engage the lever and hold the same in its closed position,
all substantially as hereinbefore set forth.
2. In drawing compasses, making the pencil leg of a sheet metal blank which
roughly resembles the letter V and which, when the two limbs of the blank are
folded together, forms the pencil leg of two thicknesses of metal with a trough
like pencil socket at the lower end, in combination with the gripping lever D
jointed in said socket and arranged to secure the pencil therein or release the pencil
therefrom, all substantially as hereinbefore set forth.
3. Drawing compasses made substantially as hereinbefore described and illus-
trated by the accompanying drawing.