Improvements relating to Set Squares.
Year: 1894

page_text: Date of Application, 31st Aug., 1894
Complete Specification Left, 15th May, 1895-Accepted, 17th Aug., 1895
PROVISIONAL SPECIFICATION.
Improvements relating to Set Squares.
JOHN JAMES HUGHES British Schools Llangennech Carmarthen Schoolmaster
do hereby declare the nature of this invention to be as follows:-
A set square (60°) for drawing purposes made of thin pear-tree wood or papier
maché: the bevelled sides containing the right angle to be 7" and 4" long nearly,
or other lengths in same ratio, with the inches distinctly marked thereon, and
divided into halves, 3rds and 4ths on the 4 inch side, and divided into 5ths, 6ths,
8ths, 10ths, 12ths and 16ths of an inch on the 7 inch side: Across the front face
are also drawn 6 lines parallel to the shortest side. Also figures of circle
(showing radius diameter & circumference) triangle (apex, base, height) and square
(diagonal) on the same face, as well as a vertical, oblique and horizontal line.
The obverse (back) face, with 2 sides marked in inches, shows the angles 90°
60° 30° bisected by straight lines respectively.
Dated this 28th day of August 1894.
JNO. J. HUGHES,
Applicant.
пиртомещения геланц
JOHN JAMES HUGHES of the British Schools Llangennech, in the County of
Carmarthen, Wales, Schoolmaster 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 :-
It will be seen that this invention relates to set squares for mechanical and
geometrical drawing and cousists in improvements in such set squares whereby
they are rendered useful for many additional purposes and especially suitable for
use by the pupils of elementary schools.
In order that this invention may be fully understood I append a sheet of drawings
of a square according to my invention of which:
Fig. I is a view of the obverse face of a set square according to my invention.
Fig. 11 is a view of the reverse face of the same.
I make my set square of pear tree or other wood or papier maché and it is of
that description which is generally called a 60° square or having an angle of 60°,
one of 90° and consequently one of 30° the sides of which containing the right
angle having their edges bevelled.
In a set square of this description it is well known that the lengths of the two
sides which contain the right angle are 7 inches and 4 inches nearly and in a larger
or smaller set square bear a similar ratio to each other.
On the obverse face each of the two bevelled edges is divided and has the inches
marked plainly and distinctly thereon and on the 4 inch or shorter side marked A. of
the two the inches are subdivided into (a) halves (b) thirds (c) fourths and on the
7 inch or longer side marked B, of the two, into (d) fifths (e) sixths (f) eighths

page_text: (g) tenths (h) twelfths and (i) into sixteenths of an inch, all of which are plainly
inscribed and marked C is the longest side.
Across this obverse face are also described and drawn at distances of one inch
apart six lines k, k², k³, k³, h^, k³, parallel to each other and to the 4 inch or smaller
side and in the spaces between such parallel lines different figures are described
and drawn as follows:-
Xa circle showing or illustrating the radius, diameter, and circumference.
Y a triangle showing apex, height, and base.
Za square showing diagonal, and diameter.
V specimens of lines, vertical, oblique, horizontal and parallel.
W specimens of angles, acute, obtuse, and right, each has printed close to it its
descriptive term.
The reverse or back face has the sides A and B containing the right angle marked
and numbered in inches as on the other side and further has a line (1) which bisects
the angle of 30 thus dividing it into two of 15° a line (m) which bisects the angle
of 60° into two of 30° and a third line (n) which bisects the right angle into two
of 45° each.
E marks the point where the two shorter sides meet at a right angle.
Any measurement can now be made. Say it is required to measure 3 inches.
Draw from E to the point indicating 7 inch which is situate between k² and k³.
If 2 inches is required-draw from 2 to that point between k* and ** which
indicates inch.
Set squares marked according to my invention will be found extremely useful
especially to those learning drawing and geometry and in eight elementary
standards for the purpose of familiarising with lines triangles squares angles &
circles as a child could at a glance correct his own mistakes.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what
I claim is :-
I. The improved set square consisting of a set square having different scales
marked in each of the inches substantially as shewn and described.
II. The improved set square consisting of a set square having different scales
marked in each of the inches and geometrical figures described upon one or both of
its faces substantially as shewn and described.
III. The improvements in set squares substantially as herein shewn and
described.
Dated this First day of May One thousand eight hundred and ninety-five.
JNO. J. HUGHES,
British Schools, Llangennech, R.S.O., Carmarthen, Applicant.