Improvements in Compasses or Dividers.
Year: 1891

page_text: Date of Application, 13th Feb., 1891
Complete Specification Left, 12th Oct., 1891-Accepted, 14th Nov., 1891
PROVISIONAL SPECIFICATION.
Improvements in Compasses or Dividers.
I ROBERT BAUER, of Hamburg Germany Painter do hereby declare the nature
of this invention to be as follows:-
This invention relates to compasses or dividers provided with a graduated arc for
use in reading off and noting down measurements.
The graduated arc is concentric with the compass joint and is fixed removably to
the one leg and passes through the other leg which slides on it.
It is made pre-
ferably of a diamond or rhombic section, its major diameter, and consequently the
acute angles, being in the plane of the compass, so that the scale presents to the
eye of the user the sides adjacent to the obtuse angles. The graduations, according
to the metric or other system of measurement and to any desired scale of proportion,
are marked on the surfaces at either side of the obtuse angles and, to obviate error,
they may be lacquered different colors.
The arc being removable may be replaced by another graduated to a different
scale.
This device is of great service in measuring up drawings for the purpose of
taking out quantities or estimating cost, as the instrument may be used with one
hand whilst the other is free to note down the measurements.
Dated this 13th day of February 1891.
R. BAUER.
By A. M. & Wm. Clark,
53, Chancery Lane, London, Patent Agents.
COMPLETE SPECIFICATION.
Improvements in Compasses or Dividers.
I, ROBERT BAUER of Hamburg, Germany, Painter, 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 compasses or dividers provided with a graduated arc or
segmental scale for use in reading off and noting down measurements.
The invention will be described with reference to the accompanying drawing which
represents a face view of the instrument and a cross-section of the graduated arc
which forms the subject of this invention.
The graduated arc a is concentric with the compass joint and is fixed removably
to the one leg b.and passes through an aperture in the other leg c which slides on
It is made preferably of a diamond or rhombic section, its major diameter
and consequently the acute angles being in the plane of the compass so that the
scale presents to the eye of the user the sides adjacent to the obtuse angles.
the arc.
The graduations according to the metric or other system of measurement and to
any desired scale of proportion, are marked on the surfaces immediately adjacent to
and at either side of the obtuse angles and to obviate error they may be lacquered
of different colors.
To facilitate reading off the scale, the leg c may be bevelled as at d.
With the metric system, the divisions are made in, say, 18 or 1, or
for },
and
be directly read off, for instance 30, 20, etc. For an inch system, the divisions are
made accordingly.
or, full size. By means of the decimal system, tenths, hundredths, may

page_text: The are being removable may be replaced by another graduated to a different
scale.
This device is of great service in measuring up drawings for the purpose of taking
out quantities or estimating cost, as the instrument may. be used with one hand
whilst the other is free to note down the
measurements.
Having now particularly described and ascertained the nature of the said
invention, and in what manner the same is to be performed, I declare that what
I claim is
Compasses or dividers provided with a graduated arc of the sectional form
described and shewn, fixed removably to one leg and passing through an opening in
the other, substantially as specified.
-ՆԵ
R. BAUER.
By A. M. & Wm. Clark,
53, Chancery Lane, London, Chartered Patent Agents.