Year: 1888

page_text: I, JOSEPH PULSIFER, of Williams, in the county of Colusa, State of California,
one of the United States of America, Farmer, 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 relates to what I term an artists mechanical sketching device; and
it consists of a framework supported upon an adjustable tripod or stand, having one
end prepared for the reception of a paper or a sketching, surface, which is attached
thereto, and an opening made through the other end with an eye-piece, through which
the subject to he sketched may be viewed; and, in connection, therewith, of a panto-
graph or framework, having one end pivoted to the frame, and the other end adapted.
to carry a pencil or marking point, which will be moved over the paper in making
the sketch, while one of the angles has a sight-opening, which being moved in line
with the eye-piece, enables the outlines and shades of the object looked at to be.
accurately conveyed to the canvas or paper.
Referring to the accompanying drawings,
The Figure is a view of my device.
A is a board or other suitable frame or table for the support of the drawing-paper
or surface B, which is suitably fixed upon the board at one end. The opposite end of
the board may be cut away; or it may be formed, as shown in the drawing, with an
opening B', through which the observer will have a view of the landscape or other
subject which is to be drawn.
To the lower portion of the board or frame, and just beneath the opening B₁, is
securely attached an angular frame, having an eye-hole, as shown at C, through which
the observer will look. D is a jointed frame or pantograph, having the end E securely
pivoted to the side of the board or frame, so that the end F, which carries the pencil
may be moved about freely over the surface B, in the manner usual to this class of
devices. In order to counter-balance the extended end F, I employ a spring G, of
sufficient tension, one end of which is attached to the board or frame, and the other
to the hinged arm of the pantograph.

page_text: v
A weight might be substituted, if desired. Through one of the angles of the
frame D, is made a sight-hole H, which may have an ivory or other suitable point 1,
fixed in it, as shown.
This device is supported by means of a tripod, which is either attached directly to
the rear portion of the frame, or to a table upon which the frame may be supported.
One or more legs of the tripod may be made adjustable by means of a single sliding
leg J, which enters a corresponding hole in the upper portion K. of the leg, and may
be secured therein by a set or holding-screw, as shown at L, so that this leg may be
lengthened or shortened to suit circumstances and get the apparatus in the proper
position for the work to be done.
The operation of the apparatus will then be as follows
The tripod having been set up and adjusted, and the frame supported upon it in the
proper position, (which will, preferably, be at a slight angle from the perpendicular,
like an artist's easel,) sight is taken through the openings O, and H; and as the
point I is moved over the outline or details to be copied, the pencil F will be moved
by the hand of the operator over the surface B, thus transferring an exact picture
upon the paper. It will be manifest that this device may be used for landscapes, for
figure, or other drawing; and it may also be used for putting in details of shading
and other matter so as to make a perfect picture.
For convenience in transportation, the tripod-legs K, may be jointed so as to be
folded up; and the drawing-board or table may also be made with hinges in the
center, so that it may be folded up with the legs when not in use, and thus be easily
transported.
By means of the pantograph, the sketch may be accurately enlarged or diminished;
and, if desired, a telescopic eye-piece may be employed to make the object clearer.
_ 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. The frame or table, upon one end of which the paper or drawing-surface is
attached, and upon the other end a pantograph or jointed frame, pivoted so that the
free end carrying a pencil approaches the paper surface, a hole and sight-piece made
through the intermediate joint of the frame, in combination with a fixed or stationary
sight-opening, through which and the sight in the jointed frame, the object to he
drawn is observed, and by which it is transferreil to the paper by following the outline
or details by the two sight-openings while the pencil is moved over the paper, substan-
'tially as described.
"
2. The frame or table supporting the drawing-surface at one end, having the other
end perforated, with a fixed sight-piece in the front of the opening, in combination
with a jointed frame or pantograph, having a pencil or drawing-point attached to the
and which moves over the paper, while the other end is pivoted to the opposite end of
the frame or support, and has a spiral or other spring G, connected with it, substan-
tially as and for the purpose herein described.