Improvements in and relating to Appliances for Teaching Model or other Object Drawing.
Year: 1897

page_text: PROVISIONAL SPECIFICATION.
Improvements in and relating to Appliances for Teaching Model or
other Object Drawing.
I, JAMES LESSELLS, Art Master of the School of Science and Art, in Montrose,
Forfarshire, do hereby declare the nature of this invention to be as follows:-
Two equal rectangular boards are hinged together on one side. The lower one
is fixed to a leg frame, and to the upper one is fixed a circular ring whose diameter
is slightly greater than the diagonal of the board. The upper board with its ring
can be raised on its hinges to any angle up to a vertical position if required.
The object of this is to enable pupils to readily find a true representation of
the appearance of the board from any point in the class, in whatever form the
room may be constructed. This is effected by the circle being represented by an
ellipse having its major axis horizontal. The corners of the board are then found
in the ellipse, and when joined give the correct representation.
It is claimed for this invention that an enormous saving of teaching time will be
effected, and that the common errors in attempting to draw the board, and in
consequence, all the models that it supports will be almost impossible.
This can be proved by raising the upper board with its ring attached and trying
the lower one without a ring.
When the boards are in a vertical and horizontal position they can also be
used to illustrate the principles of plan and elevation drawing.
1005
Improvements in and relating to Appliances for Teaching Model or
other Object Drawing.
I, JAMES LESSELLS, Art Master of the School of Science and Art, Montrose,
Forfarshire, do hereby declare the nature of my invention and in what manner
the same is to be performed to be particularly described and ascertained in and by
the following statement, that is to say: -
This invention has reference to improvements in and relating to teaching model
or other object drawing.
And in order that my said invention and the manner of carrying same into
practice may be properly understood, I have hereunto appended a sheet of ex-
planatory drawings in which the same reference letters are used to indicate like
parts in the several parts figures where shown. Figure 1 is a plan view and
ED 077

page_text: Figure 2 an end elevation illustrating one arrangement of my improvements, and
Figure 3 is a detached view showing the bracket by which the ring is secured to
the top table. Figures 4 and 5 are views similar to Figures 1 and 2 of a slightly
modified arrangement of my improvements. Figure 6 is a detached view of the
ring securing fittings and Figure 7 a similar view of the hinge by which the ring
is secured to the board.
Referring to Figures 1 to 3 two equal rectangular boards A B are hinged together
at C on one side. The lower one B is fixed to a leg frame or legs B¹ and to the upper
one is fixed a circular ring D whose diameter is slightly greater than the diagonal
of the board. The upper board A with its ring I can be raised on its hinges C
to any angle up to a vertical position if required, it being shown in an angled
position by the dotted lines. The object of this is to enable pupils to readily
find a true representation of the appearance of the board from any point in the
class in whatever form the room may be constructed. This is effected by tho
circle being represented by an ellipse having its major axis horizontal. The
corners of the board are then found in the ellipse and when joined give the correct
representation.
A bracket E shown detached in Figure 3 is fitted at each of the four corners of
the upper board A to secure the ring D to it.
In the arrangement shown in Figures 4 to 7 the board A is dispensed with, and
the ring D is hinged at C to the board B, and the ring D is secured at the opposite
edges of board B by projecting snugs E¹ as shown detached in Figure 6.
It is claimed for this invention that an enormous saving of teaching time will be
effected and that the common errors in attempting to draw the board, and in
consequence all the models that it supports, will be almost impossible. This
can be proved by raising the upper board with its ring and trying the lower one
without the ring.
When the boards are in a vertical and horizontal position they can also be
used to illustrate the principles of plan and elevation drawing.
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-
First. The method of teaching model or other object drawing by employing a
ring mounted on a board or the like substantially as set forth.
Second. In teaching model or other object drawing, the combination of a board
or boards and a ring, substantially as set forth.
Third. In teaching model or other object drawing the combination of a board
with a ring hinged to it, substantially as herein described in reference to and
shown in the accompanying drawings.
Fourth. In teaching model or other object drawing, the combination com-
prising a board, a ring hinged to it, and a leg frame or table, substantially as
herein described in reference to and shown in the accompanying drawings.
Dated the 8th day of July 1808
Dated the 8th day of July 1898
W. R. M. THOMSON & Co.,
90, Buchanan Street, Glasgow,' Agents.