A New or Improved Article or Instrument for use in Drawing Angles.
Year: 1892

page_text: Date of Application, 19th Dec., 1892-Accepted, 11th Feb., 1893
COMPLETE SPECIFICATION.
A New or Improved Article or Instrument for use in Drawing
Angles.
I, FRANK ERNEST WILKINS of 47 Vine Street, Coventry, in the County of
Warwick, Schoolmaster, do hereby declare the nature of my said invention and in
what manner the same is to be performed to be particularly described and
ascertained in and by the following statement:-
My invention has for its object a new or improved article or instrument for use
in drawing angles which I may call an "Anglant" and by which means polygons
of any number of sides and of any size may be drawn with perfect ease and
without any calculation being required such articles in their simplest form being
for use in schools while in their more technical form they are particularly adapted
for use in the offices of architects, engineers, surveyors and schools of art.
In order that my invention may be clearly understood and more easily carried
into practise I have appended hereunto a double sized sheet of drawings upon
which I have fully illustrated the nature of my said improvements.
Figure 1., shows a simple form of my invention suitable for use in schools.
Figure 2., shows a modification having angles other than polygonal.
Figure 3., shows a further modification.
Figure 4., shows a modification in which any number of angles can be embodied.
Figure 5., shows a combination of protractor and set square with polygonal
angles.
Figure 6., is a view showing the use and application of my invention.
In carrying my invention into effect I take a piece of wood, vulcanite, horn,
ivory, metal, or other suitable material which I cut to form a plane A having a
number of angles such as shown at Figure 1 where angles 4, 5, 6, 7, 8, are formed
which are suitable for either forming a square, pentagon, heptagon, hexagon, or
octagon; and which is a simple form suitable for use in schools. In Figure 2 the
same angles are provided with the addition of two angles which are not polygonal,
viz.; one of 45° and one of 30° while the circular edge may be formed as a
protractor as hereafter described. In the case of Figure angles are provided for
forming 3, 4, 5, 6, 7 & 8 sided figures while an article with angles for forming
figures of any number of sides may be provided by continuing this form as shown
by dotted lines B thus forming a spiral of any size and with any number of angles.
The article or instrument may be marked with information or instructions with
regard to the formation of polygons &c., as shown at Figure 5 and may have a
protractor cut in any convenient position such as shown at Figure 5 thus rendering
the same instrument useful for obtaining any angle required. The sides of the set
angles may be marked in inches or parts of inches as shown at Figure 3 thus
enabling my improved article to be used for measuring the length of each side of
the polygon as it is formed. The mode of using my instrument is as followe. A
line is drawn to form the base of the polygon and the point a' marked for the one
angle then supposing it to be an hexagon to be drawn the one side of the instru-
ment is placed level with the base line a³ and the line a is drawn which then forms
a base for the next angle to be formed and so on as shown at Figure 6 until the
complete polygon has been formed.
Of course the examples shown upon the drawing only serve to indicate one or
two of the variety of forms which this instrument or article may take.

page_text: Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
A new or improved article or instrument for use in drawing angles, sub-
stantially as and for the purpose herein set forth and shown upon the accompanying
drawings.
Dated this 17th day of December 1892.
GEORGE BARKER,
77,, Colmore Row, Birmingham, Agent.