Improvements in Drawing Compasses.
Year: 1895

page_text: Date of Application, 24th Dec., 1895
Complete Specification Left, 24th Sept., 1896-Accepted, 31st Oct., 1896
PROVISIONAL SPECIFICATION.
Improvements in Drawing Compasses.
LEOPOLD MYERS Pen Manufacturer Charlotte Street Birmingham do hereby.
declare the nature of this invention to be as follows:-
:-
The object of my invention is to combine a compass & rule in one, so that on
opening the legs of the same, the measurement can be readily obtained, from a set
out quadrant, lying, or situate, near the centre of the compass, on the one side, and
a finger, or fingers, working in combination with the same, on the opposite side.
To do this, I cast, or cut out of sheet metal, two sides of a compass, one side having.
an arm, or quadrant on it, near its centre, on one side of which is marked inches,.
and the other side metres. The other side of the compass, having a pointer cut out
on it as, a marker, or indexer, on these two parts being rivetted together, the
pointer travels along the quadrant which is marked, so as to give the proper-
distances at the foot, of the compass, and a further point is fixed, or rivetted, to the
opposite side, which being bent over the quadrant forms a guide or support, to
steady it. I make prefferably a spring clip on the one side, to hold the pencil, and
on the other, I fold the metal over, so as to insert a steel needle for the point.
Dated this 23rd day of December 1895.
Improvements in Drawing Compasses.
1, LEOPOLD MYERS, of Charlotte Street, Birmingham, in the County of
Warwick, 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 consists of the hereindescribed improvements in drawing compasses
my object being to so arrange the compass that any required distance between the
points of the compass legs can be obtained without measuring the same on a separate
rule.
In carrying out my invention one of the legs of the compass is provided with a
quadrant arm situated between the joint and the ends of the legs, the other leg
carrying an index finger or pointer which travels over this quadrant and by its
position on a scale marked on this quadrant indicates the exact opening of the
points of the legs.
Fig. 1 of the accompanying drawing is a front view of a compass constructed
according to this invention and Fig. 2 is a back view of the same.
•
A B are the two legs of the compass which are jointed together at C. The
leg A is made with the arm or quadrant a¹ between the joint C and the outer ends
of the legs this quadrant being marked off at certain distances apart forming a
scale to correspond with the distances in inches or parts of an inch at which the
ends of the legs are apart. The other leg B is made with a pointer b' which, as
the legs are opened or closed travels over the scale on the quadrant also as to shew
Print

page_text: at a glance what is the distance between the opening of the outer ends of the
legs Å B.
The legs A and B are by preference made from sheet metal blanks (or they may
be cast) each having a raised longitudinal strengthening rib marked respectively bas
one of the legs preferably the leg A being formed as a clip socket a³ to carry the
pencil D and the other leg B having its end 6 made to "fold over and hold the
needle point. 6.
The back of the quadrant arm a¹ may be marked similarly to the front of the
same, or either the back or the front of the arm may be marked to indicate
the opening of the legs A B in millimetres.
Having now particularly described and ascertained the nature of my inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1. A drawing compass having one of its legs made with a quadrant arm situated
between the joint of the legs and their ends said quadrant arm having a scale marked
on it and the other leg having a pointer which as the compass is opened or closed
travels along the said scale and indicates the distances between the ends of the legs
substantially as hereinbefore described.
2. In a drawing compass the combination of the two legs A B jointed together
at C the leg A being made with the pencil socket a³ and the quadrant arm a¹ having
a scale marked upon it, the leg. B having a pointer 6' which indicates on the scale
on the quadrant arm the opening of the ends of the legs, the parts being constructed
and arranged substantially as hereinbefore described and illustrated by the
accompanying drawing.
Dated this 23rd day of September 1896.
CHARLES BOSWORTH KETLEY,
Agent for the Applicant.