IMPROVEMENTS IN APPARATUS FOR TEACHING AND ILLUSTRATING PERSPECTIVE DRAWING
Year: 1878

page_text: LETTERS PATENT to Philip Jolin, of 106, Tufnell Park Road, in the County of
Middlesex, for the Invention of "IMPROVEMENTS IN APPARATUS FOR TEACHING
AND ILLUSTRATING PERSPECTIVE DRAWING."
Sealed the 8th October 1878, and dated the 18th April 1878.
PROVISIONAL SPECIFICATION left by the said Philip Jolin at the Office of
the Commissioners of Patents on the 18th April 1878.
PHILIP JOLIN, of 106, Tufnell Park Road, in the County of Middlesex. ."IM-
PROVEMENTS IN APPARATUS FOR TEACHING AND ILLUSTRATING PERSPECTIVE
DRAWING."
This Invention has for its object improvements in apparatus for teaching andl
illustrating perspective drawing.
The apparatus consists of a rectangular board with a rim around it on three of
its sides.
Upon the board there is placed a ground plan corresponding to a model the
perspective drawing of which it is desired to teach or illustrate ; this plan is
drawn upon cardboard or stout paper, and the rim around the board serves to keep
it accurately in its position.
Upon the drawing, in the place marked for it upon the plan the model itself is
stood, and it is secured by a screw passing through the board from the underside
and entering the base of the model. To the sides of the board there are fixed, by
means of screws, easily removable to facilitate packing, a pair of grooved standards
opposite the one to the other, and these sustain a plate of glass in a position vertical
to the board upon which its lower edge rests. The glass has upon its face the per-
spective drawing of the model taken from a position marked by an upright attached
by a screw to the front of the board, and which upright may be considered to re-
present the spectator. .
Threads are attached to the prominent points of the model, and these are led
away in straight lines through fine holes bored in the glass, and the threads are laid

page_text: together in a V notch fixed upon the upright representing the spectator, and which
V notch may be taken to represent the eye. The threads are drawn tight and are
secured by a slider passed down over them.
The glass plate has upon it, in addition to the perspective drawing of the model,
such lines as are necessary for the elucidation of the principles upon which the
drawing is made.
The arrangements are such as to admit of the positions of the standards on the
sides of the board, and of the upright representing the spectator in the front thereof,
being varied in their positions as circumstances may render desirable.
The apparatus is provided with the number of models with plates and plans to 1
correspond.
When by withdrawing the screws the upright and the two standards are removed,
the whole of the apparatus packs flat in a box made to receive it.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Philip Jolin in the Great Seal Patent Office on the 18th October
1878.
PHILIP JOLIN, of 106, Tufnell Park Road, in the County of Middlesex.
"IM-
. PROVEMENTS IN APPARATUS FOR TEACHING AND ILLUSTRATING PERSPECTIVE
DRAWING."
This Invention has for its object improvements in apparatus for teaching and
illustrating perspective drawing.
The apparatus consists of a rectangular board with a rim around it on three of its
Bides.
Upon the board there is placed a ground plan corresponding to a model the per-
spective drawing of which it is desired to teach or illustrate; this plan is drawn.
upon cardboard or stout paper, and the rim around the board scrves to keep it
accurately in its position.
Upon the drawing, in the place marked for it upon the plan, the model itself is
stood, and it is secured by a screw passing through the board from the under side,
and entering the base of the model. To the sides of the board there are fixed, by
means of screws, easily removable to facilitate packing, a pair of grooved standards
opposite the one to the other, and these sustain a plate of glass in a position vertical
to the board upon which its lower edge rests. The glass has upon its face the per-
spective drawing of the model taken from a position marked by an upright attached
by a screw to the front of the board, and which upright may be considered to
represent the spectator.
Threads are attached to the prominent points of the model, and these are led away
in straight lines through fine holes bored in the glass, and the threads are laid
together in a V notch fixed upon the upright representing the spectator, and which

page_text: V notch may be taken to represent the eye. The threads are drawn tight and are
secured by a slider passed down over them.
The glass plate has upon it, in addition to the perspective drawing of the model,
such lines as are necessary for the elucidation of the principles upon which the
drawing is made..
The arrangements are such as to admit of the positions of the standards on the
sides of the board, and of the upright representing the spectator on the front thereof,
being varied in their positions as circumstances may render desirable.
The apparatus is provided with a number of models with plates and plans to
correspond.
=
When by withdrawing the screws the upright and the two standards are removed,
the whole of the apparatus packs flat in a box made to receive it.
In order that my said Invention may be most fully understood and readily
carried into effect, I will proceed to describe the Drawings hereunto annexed.
Figure 1 is a plan, Figure 2 is a front elevation, and Figure 3 is an end elevation
of apparatus arranged according to my Invention for teaching and illustrating per-
spective drawing.
A is a rectangular board having around it a rim A³, so contrived that a sheet of
cardboard B may be slidden in beneath it. Upon this card a plan of the object is
drawn, and there may also advantageously be marks to indicate the positions for the
standards D, D, and upright G .herein-after referred to.
In the Drawing C represents the object; in this case it is a rectangular block.
The object is attached to the board A by a screw passed through the board from
the under side; D, D, are standards which fit to the sides of the board A, and are
clamped in any position desired along the side of the board by clamping screws E, E.
The method of fixing these standards is more clearly seen in the Figures 4, 5,
and 6.
Figure 4 shows to a larger scale the inner side of one of the standards; Figure 5,
its outer side; and Figure 6 shows a vertical section, together with a portion of
the board A and the binding screw E.
The screw has a nut upon it which can be inserted into oue or other of several
recesses provided for it in the thickness of the board. The screw passes through an
elongated hole in the standard, so that some adjustment may thus be made in the
position of the standard, which consequently can be set in any desired position along
the side of the board.
F is a glass plate; it is dropped into grooves formed in the standards D to receive
it. On the face of the plate F a perspective drawing of the object together with
explanatory lines is traced.
The drawing in connection with the object C is seen in Figure 2; the glass is also
drilled at the angles of the object, as represented on the glass surface, and through
the holes threads are passed to the actual corresponding angles of the object. The
same threads are also continued on the front side of the glass, and are led through
the notch G¹ in the upright G.
Figure 7 is a back view of the upright G; and Figure 8 is a section of the upright
G called the "spectator."
The "spectator" G is attached to the front of the board by a screw and nut H,
in the same way as the standards D are beld by the screws E.
G* is a slider working upon the upright G, which after that the threads have
been laid in the V notch is pushed down over them into the position in which it is
seen in the drawing, and so when all the threads have been drawn tight they are
held fast.
The apparatus can be supplied with a variety of different models, and for each
there will be required a different glass F and plan card B. There may also be soveral

page_text: different plan cards and glasses for the same model, corresponding to different posi-
tions of the model and of the spectator.
?
Having thus described the nature of my said Invention and the manner of
performing the same, I would have it understood that I claim the construction
of apparatus for teaching and. illustrating perspective drawing, substantially as
desribed.
In witness whereof, I, the said Philip Jolin, have hereunto set my hand and
seal, this Eighteenth day of October, in the year of our Lord One thousand
eight hundred and seventy-eight.