An Appliance for Facilitating the Drawing of Objects in Correct Perspective.
Year: 1897

page_text: Date of Application, 12th July, 1897
Complete Specification Left, 22nd Mar., 1898-Accepted, 4th June, 1898
PROVISIONAL SPECIFICATION.
An Appliance for Facilitating the Drawing of Objects in Correct
Perspective.
JOHN HENRY APPLETON, 211, Park Road, Oldham, County of Lancaster, Certifi-
cated Art Master, do hereby declare the nature of this invention to be as
follows:-
An instrument to obtain the inclination of lines of objects, buildings, etc.,
whether rectangular or polygonal when turned at any angle from the eye, &
thereby assist to correct the common error of rendering objects sufficiently flat, &
foreshortened surfaces small enough. It is also designed to obtain exact propor-
tion of parts one with the other for which purpose one side is figured from the
centre outward horizontally and from the centre upward & downward vertically.
It consists of two flexible arms made to close up for pocket or box, & jointed
with rivet eyelit or bolt and thumbnut the arms to be held in position by adhesion
at the joint or by disc & screw.
The whole to be made of cardboard, ivorine, bone, papier-mache brass or other
metals.
A Shows instrument open.
B Shows instrument closed.
Fig. 1 Shews the application of it for obtaining any angle.
Fig. 2 When held between the object and the eye to determine proportion
of planes laterally.
Fig. 3 For obtaining proportion of vertical & horizontal planes as viewed in
any position.
An Appliance for Facilitating the Drawing of Objects in Correct
Perspective.
JOHN HENRY APPLETON, 211, Park Road, Oldham, Art-Master, Municipal
Technical School, Oldham, County of Lancaster, 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:-
My invention is to facilitate the correct drawing of straight lined common

page_text: objects architectural arrangements and the like, being a mechanical contrivance
to prove the true inclination of their several lines as they appear to the spectator,
the number of degrees they may lie at, together with the ascertaining of the
relative proportions of such common objects and architectural arrangements.
In describing my invention reference be had to the accompanying drawing
shewing it to consist of two arms A, B, rotating round C, radiating from that
point is a scale of degrees to read off their angles. The arms to be held in
position by friction at the joint. Or by link attached to side and the free end
moving in the slot of arm at D, and similarly to the other arm, the links to be then
secured by screws, when the arms are adjusted to the required position. Or the
modification at E, may be employed consisting of a slot in a sector secured by
means of a screw at F. The arms to be scaled and figured horizontally from the
centre to the right and left and on the reverse side the arms to be likewise scaled
and figured from the centre up & down; this being to determine the relative pro-
portion of parts of objects from the spectator's point of view. The arms to fold
up compactly as at G, between two sides or cheeks or as a modification only one.
The appliance to be made of cardboard, wood, ivory, metal, or enamelled iron,
or the like.
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;
1. An appliance for facilitating the drawing of objects in correct perspective
by means of having two arms readily adjustable to any inclined line or lines
viewed by the spectator.
2. By affixing round the point the arms rotate at a scale of degrees so that the
angle they make may be read.
3. By the figured scales from centre upward & downward & to the right and left
to be able to ascertain the relative proportion of parts.
4. The general arrangement and combination of parts substantially as set forth
in the drawing and specification.
Dated this 21st day of March 1898.
JOHN HENRY APPLETON,
Applicant.