Improvements in and relating to Instruments for Drawing Maps or Plans.
Year: 1896

page_text: Date of Application, 5th Mar., 1896
Complete Specification Left, 7th Dec., 1895-Accepted, 5th Mar., 1897
PROVISIONAL SPECIFICATION.
Improvements in and relating to Instruments for Drawing Maps
or Plans.
I. LAURENT CAZES of 44 Boulevard St. Michel, Paris Professor, do hereby
declare the nature of this invention to be as follows:-
This invention relates to improvements in and relating to instruments for drawing
maps or plans, and the object of my invention is to enable two separate maps or
plans to be simultaneously drawn from an ordinary map or plan, said separate maps
or plans being drawn in such a manner as to produce, when stereoscopically
superposed or otherwise arranged or more generally by the binocular vision, an
appearance of relief of the ground or object thus drawn.
This result is obtained by employing two tracing styles in combination with a
directing style, the arrangement being such that when the directing style is passed
over the lines on an ordinary map or plan-such for example as a topographic
map er plar-the two tracing styles will each draw a more or less similar plan as
desired. For the purpose of making a sufficient difference in the maps or plans
made by the tracing styles as compared with the original or ordinary map or plan,
so as to obtain the desired result when the maps are arranged as above described,
I may provide any suitable mechanism which will cause such divergence of
movement of either or both said tracing styles as may be requisite.
As an example, I may mount or fix the two tracing styles on a bar-one at about
each end-said bar being connected at its ends to two pantographs or any usual
construction. One end of each pantograph is pivotally fixed to the drawing
table or equivalent in the usual manner and the two other or free ends of said
pantograplis are pivotally joined together and provided at point of junction with
a directing style, the arrangement being such that each of the tracing styles
will describe similar lines or curves to those described by the directing style.
Under each of the tracing styles there is a drawing board cr equivalent which
two boards are connected together by means of a right or left hand screw in
such a
manner that when said screw is revolved by means of a handle or
equivalent, the said two boards will be either brought closer together or moved
further apart according to the direction in which the said screw is revolved.
If the directing style be moved over the lines on an ordinary topographic
or other map or plan the tracing styles will describe similar lines but by turning
the screw connecting the boards at the proper time and to a sufficient extent
the lines drawn on the papers by the tracing styles will diverge to a corre-
sponding extent, the result being that when said tracings are superposed the
lines which have been caused to diverge as above described will produce the
effect of relief. The amount of such apparent relief corresponding to the amount
or extent to which the boards have been caused to diverge.
Any suitable mechanism may be employed to cause the lines drawn by the
tracing styles to diverge to a sufficient extent, for example, I may employ a bar
upon which said tracing styles are mounted said bar being made telescopic so as to
be capable of being lengthened or shortened by means of a screw or equivalent
while the directing style is being passed over the lines of an ordinary map or plan,

page_text: said bar being supported by two pantographs. But I wish it to be distinctly
understood that I do not confine myself to any particular means for causing the
lines drawn by the tracing styles to diverge as compared with the map from which
they are traced or copied.
I wish it to be understood that I do not confine myself to any particular
arrangement of the different parts in my improved instrument, nor to any particular
arrangement of the maps or plans made by the tracing styles. I may also use any
kind of ink or other substance or material with my improved instrument and
the material upon which the said maps or plans are made by the tracing styles
may be any which in practice is found most suitable. The said maps or plans
made by the tracing styles may be also reproduced in any suitable manner and by
any suitable means or apparatus.
Dated this 5th day of March 1896.
HORN, SON & Co..
Applicant's Agents.
CUMI LETE SPECIFICATION.
Improvements in and relating to Instruments for Drawing Maps
or Plans.
'I, LAURENT CAZES of 44 Boulevard St. Michel, Paris, Professor, 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 :-
This invention relates to improvements in and relating to instruments for
drawing maps or plans, and the object of my invention is to enable two separate
maps or plans to be simultaneously drawn from an ordinary map or plan, said
separate maps or plans being drawn in such a manner as to produce, when stereo-
scopically superposed or otherwise arranged, or more generally by the binocular
vision, an appearance of relief of the ground or object thus drawn.
This result is obtained by employing two tracing styles in combination with a
directing style, the arrangement being such that when the directing style is passed
over the lines on an ordinary map or plan-such for example as a topographic map
or plan the two tracing styles will each draw a more or less similar plan as
desired. For the purpose of making a sufficient difference in the maps or plans
Inade by the tracing styles as compared with the original or ordinary map or
plan, so as to obtain the desired result when the maps are arranged as above
described, I may provide any suitable mechanism which will cause such divergence
of movement of either or both said tracing styles as may be requisite.
As an example, and referring to the accompanying drawing I may mount or fix
the two tracing styles A, A' on a bar B-one at about each end-said bar being
connected at its ends to two pantographs of any usual construction. One end H H¹
respectively of each pantograph is pivotally attached to the drawing table or
equivalent in the usual manner and the two other or free ends G of said
pantograph are pivotally joined together and provided at their point of junction
with a directing style, the arrangement being such that each of the tracing styles
will describe similar lines or curves to those described by the directing style.
Under each of the tracing styles there is a drawing board or equivalent J J which
two boards are connected together by means of a right and left hand screw N in
such a manner that when said screw is revolved by means of a handle or
equivalent, L, the said two boards will be either brought closer together or moved
further apart according to the direction in which the said screw is revolved.

page_text: If the directing style be moved over the lines on an ordinary topographic or
other map or plan the tracing styles will describe similar lines, but by turning the
screw connecting the boards at the proper time and to a sufficient extent.the lines
drawn on the papers by the tracing styles will diverge to a corresponding extent,
the result being that when said tracings are superposed the lines which have been
caused to diverge as above described will produce the effect of relief. The amount
of such apparent relief corresponding to the amount or extent to which the boards
have been caused to diverge.
Any suitable mechanism may be employed to cause the lines drawn by the tracing
styles to diverge to a sufficient extent, for example, I may employ a bar upon which
said tracing styles are mounted said har being made telescopic so as to be capable
of being lengthened or shortened by means of a screw or equivalent while the
directing style is being passed over the lines of an ordinary map or plan, said har
being supported by two pantographs. But I wish it to be distinctly understood
that I do not confine myself to any particular means for causing the lines drawn
by the tracing styles to diverge as compared with the map from which they are
traced or copied.
I wish it also to be understood that I do not confine nyself to any particular
arrangement of the different parts of my improved instrument, nor to any particular
arrangement of the maps or plans made by the tracing styles. I may also use any
kind of ink or other substance or material with my improved instrument and the
material upon which the said maps or plans are made by the tracing styles may be
any which in practice is found most suitable. The said maps or plans made by
the tracing styles may also be reproduced in any suitable manner and by any
suitable means or apparatus.
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 :-
1. An instrument for drawing maps or plans having the appearance of relief said
instrument having two tracing styles and a directing style and two laterally
movable drawing boards all for the purposes and substantially as described.
2. An instrument for drawing maps or plans having the appearance of relief said
instrument having two tracing styles and a directing. style, said tracing styles being
supported on telescopic bars so as to be capable of being moved further apart or
closer together relatively to their common directing style for the purposes and
substantially as described.
Dated this 5th day of December 1896.
HORN, SON & Co.,
Agents for the Applicant.