Certain Improvements in Drawing Compasses.
Year: 1893

page_text: Date of Application, 23rd Mar., 1893
Complete Specification Left, 23rd Dec., 1893-4ccepted, 27th Jan., 1894
PROVISIONAL SPECIFICATION.
Certain Improvements in Drawing Compasses.
We, ADOLPH MYERS and LEOPOLD MYERS, of the Firm of M. Myers & Son,
of Charlotte Street, Birmingham, Warwickshire, Pen Manufacturers, do hereby
declare the nature of this invention to be as follows:-
This invention has.reference to drawing compasses of that kind which consists of
a pointed metal leg jointed at the top to a socket like clip which grips and can be
moved to and fro along an ordinary cedar or other pencil so that the latter will
form the other leg of the compasses; a link being jointed to the clip part and
arranged to be clamped against the leg to keep the end of the leg and the pencil
point. at any required distance apart whilst the compasses are in use.
This invention consists in the improved construction of certain of the parts of
the said compasses as herein described whereby the compasses can be produced
and sold at a cheaper rate than heretofore.
In carrying out this invention we make the said clip socket part in the usual
way, that is to say, it consists of an oblong sheet metal blank which is bent into
a C-shaped socket to clip the pencil and has portions pierced out of the back which
are turned up to stand out parallel with each other a short distance apart to form
two ears between which the leg is hinged. The leg consists of a sheet metal
blank of the required shape pointed at the bottom end and jointed at the top end
between the said two ears of the clip socket part by means of an eyelet or a rivet
passing through the ears and leg. The said slotted link, which is also by preference
jointed between the said ears below the joint of the leg, is clamped to the leg by a
turn button of peculiar construction instead of the clamping screw usually
employed. This turn button consists of a sheet metal blank which may be of
oblong form with a projecting tongue at each end and which blank is folded across
centrally so that the two tongues come together and form the divided shank of the
turn button; this shank is passed through the slot in the link and a hole in the arin
and the ends of the shank are clenched over to secure the turn button thereto.
When the turn button is turned about its shank so that it lies in a line with the
slot in the link the leg is free to be, turned nearer to or farther from the pencil
point, but when the turn button is turned about its shank to stand across the slot in
the link then the turn button clamps the link against the leg and fixes the latter at
the required distance from the pencil point.
Instead of the turn button being made of a folded blank as stated above the
turn button and its shank may be made of a single thickness of metal and act as
above described.
Or the turn button may be dispensed with and instead thereof we may use a
clamping lever which is jointed to the leg and is so formed that when the lever is
turned outwardly the link is free of the leg but when the lever is turned
down against the leg a heel formed on the lever clamps the link against the leg and
thus secures the leg at the required distance from the pencil point.
Dated this 22nd day of March 1893.
'
CHARLES BOSWORTH KETLEY,
Agent for the Applicants.

page_text: COMPLETE SPECIFICATION.
Certain Improvements in Drawing Compasses.
We, ADOLPH MYERS and LEOPOLD MYERS of the Firm of M. Myers & Son,
of Charlotte Street, Birmingham, Warwickshire, Pen Manufacturers, 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 of that kind which consists
of a pointed metal leg jointed at the top to a socket like clip which grips and can
be moved to and fro along an ordinary cedar or other pencil so that the latter
will form the other leg of the compasses; a link being jointed to the clip part and
arranged to be clamped against the leg to keep the end of the leg and the pencil
point at any required distance apart whilst the compasses are in use.
This invention consists of the hereindescribed improved means (instead of the
usual clamping screw) for clamping the link and the leg together when the distance
between the leg and the pencil has been adjusted as required. The simple
construction of the parts which we employ for clamping the link and the leg
together as aforesaid enable the compasses to be produced and sold at a cheaper
rate than heretofore.
We will describe this invention by referring to the accompanying drawings on
which
Fig. 1 is a side elevation Fig. 2 is a sectional plan and Fig. 3 is a back elevation
of drawing compasses with our invention applied;
Fig. 4 is a side elevation Fig. 5 is a plan and Fig. 6 is a front elevation of the
peculiar turn button of the same constructed according to this invention for
clamping the link and the leg together;
Fig. 7 shews the sheet metal blank for forming the said turn button;
Fig. 8 represents in front elevation side elevation and in plan a modified form of
the said turn button and
Fig. 9 is the turn button shewn by Fig. 8 before being fixed to the leg
Fig. 10 is a side elevation, Fig. 11 is a sectional plan and Fig. 12 is a back
elevation of the same kind of drawing compasses, constructed according to this
invention with a clamping lever, for clamping the link and leg together instead of
the turn button; and
Fig. 13 is a back elevation of the compasses shewn in Figs. 10, 11 and 12 with
the clamping lever turned up to release the liuk as when the compasses are being
adjusted.
The same letters of reference indicate the same or corresponding parts in all the
figures of the drawings.
•
A is the socket like clip which grips and can be moved to and fro along the
ordinary cedar or other pencil B which latter forms one leg of the compasses. It
will be seen that this clip A is made in the usual way that is to say it consists
of an oblong sheet metal blank which is bent into a C shaped socket to clip the
pencil B and has two portions a' a pierced out of the back which are turned up to
stand out parallel with each other a short distance apart to form two ears between
which the leg C is hinged. The leg C consists of a sheet metal blank of the shape
shewn pointed at the bottom end and jointed at the top end c' between the two
ears a a² of the clip socket part A by means of an eyelet as shewn or by a rivet
passing through the ears a' a' and leg. G. D is the link which is jointed to the
ears a a² below the joint c of the leg and according to this invention is clamped to
the leg by the turn button E (or by the lever clamp F hereinafter described) which is
of peculiar construction and which forms one of the important features of this
invention. This turn button E consists of a sheet metal blank which may be of
oblong form such as shewn by Fig. 7 with a projecting tougue el e³ at each end and
which blank is folded across centrally as shewn in Figs. 4, 5 and 6 so that the two

page_text: tongues come together and form the divided shank of the turn button; this.
shank is passed through the slot in the link D and through a hole c³ in the leg C
and the ends e' of the shank are clenched over as shewn in Figs. 2, 3, 4, 5 and 6
so as to secure the turn button thereto. When the turn button E is turned about.
its shank so that it lies in a line with the slot in the link D as shewn for instance
by Fig. 5 the leg C is free to be turned about its jointed end c¹ nearer to or farther
from the point of the pencil B, but when the turn button E is turned about its
shank to stand across the slot in the link D as shewn in Figs. 1, 2, 3 and 4 then
the turn button E clamps the link D between the shoulders of the turn button
and the leg C and thus fixes the latter at the required distance from the pencil
point.
Instead of the turn button E being made from the folded blank as above-
described with reference to Figs. 1, 2, 3, 4, 5, 6 and 7 the turn button E and its
shank may be made of a single thickness of metal and act as above described. A
turn button E made in this way of a single thickness of metal is shewn by Figs. 8.
and 9 where it will be seen that the shank is divided for a short distance up and
then its ends are spread outwardly and clenched over as shewn in Fig. 8 so as to
secure the turn button E to the leg C.
Or instead of the turn button E we may as before stated use the clamping lever F
for clamping the link D and the leg together. This clamping lever F is as
shewn by Figs. 10, 11, 12 and 13 made from sheet metal and has two side pips f¹f
near one end which engage in holes in the outwardly projecting cars cc formed
on the leg C between which ears the link D can slide to and fro. This clamping
lever is made with a heel near its joint "so that when the lever F is.
turned outwardly as shewn in Fig. 13 the link D is free of the leg C; but when
the lever F is turned down against the leg C as shewn in Figs. 10, 11 and 12 the
heel of the lever F clamps the link D against the leg C and thus secures the
leg C at the required distance from the pencil point.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what
we claim is —
1. In drawing compasses of the kind herein referred to the employment of the
turn button E for clamping the leg and link together and for releasing them when
required, said turn button being constructed and applied in the manner substantially
as hereinbefore set forth.
2. In drawing compasses of the kind herein referred to the employment of the
clamping lever F for clamping the leg and link together and for releasing them
when required said clamping lever being constructed and applied in the manner
substantially as herein before set forth.
3. In drawing compasses the combination of the compass leg C, the clip socket A
jointed to leg C and adapted to fit and slide upon a pencil, the slotted link D
jointed to clip socket A, and the turn button E fixed to the leg C and adapted
to clamp the link D and leg C together and to release them when required the
whole forming the improved drawing compasses herein before described and
illustrated by Figs. 1 to 9 of the accompanying drawings.
4. In drawing compasses the combination of the compass leg C, the clip socket A
jointed to leg C and adapted to fit and slide upon a pencil, the link D jointed
to clip socket A, and the clamping lever F jointed to the leg C and adapted to
clamp the link D and leg C together and to release them when required the whole
forming the improved drawing compasses herein before described and illustrated by
Figs. 10 to 13 of the accompanying drawings.
Dated this 22nd dor of D.
1000
CHARLES BOSWORTH KETLEY,
Agent for the Applicants.