A NEW OR IMPROVED APPARATUS OR DRAWING BOARD FOR OBTAINING ANGULAR OR PERSPECTIVE DRAWINGS FROM RIGHT-LINED DRAW-
Year: 1872

page_text: LETTERS PATENT to William Edward Gedge, of No. 11, Wellington
Street, Strand, in the County of Middlesex, Patent Agent, for the
Invention of "A NEW OR IMPROVED APPARATUS OR DRAWING BOARD FOR
OBTAINING ANGULAR OR PERSPECTIVE DRAWINGS FROM RIGHT-LINED DRAW-
."-A communication from abroad by Ernest Camus, of No. 64,
INGS.
Wenhout Min
D......
PROVISIONAL SPECIFICATION left by the said William Edward Gedge
at the Office of the Commissioners of Patents, with his Petition,
on the 24th December 1872.
I, WILLIAM EDWARD GEDGE, of No. 11, Wellington Street, Strand, in
the County of Middlesex, Patent Agent, do hereby declare the nature of
the said Invention for "A NEW OR IMPROVED APPARATUS OR DRAWING BOARD
FOR OBTAINING ANGULAR OR PERSPECTIVE DRAWINGS FROM RIGHT-LINED DRAWINGS,"
a communication to me from abroad by Ernest Camus, of No. 64,
Faubourg St. Martin, Paris, France, to be as follows:-
-
The object of this Invention is to remove the great difficulty which
draughtsmen have to overcome in transforming a right-lined ornamental
or other Drawing into an oblique one.
In addition to the great difficulty in labour overcome by this apparatus
it also affords the advantage of a considerable saving of time, for the
drawing having been made upon this apparatus a single turn of a crank
is all that is required to put it at twenty or fifty different angles giving

page_text: absolutely geometrical views; that which a draughtsman however skilful
would not obtain in two days or more is obtained by the use of this
apparatus in a second, and with more regularity.
This apparatus is composed of a plane part upon which moves a frame,
the four sides of which are jointed two and two so that each of the
angles may be either very sharp or very obtuse. The frame moves in
the direction of the length of the plane part, and this latter is about
20 inches longer than the frame. The sides of the frame which are in
the direction of the length are set to move with considerable friction in
grooves of a double dovetail form previously made in the entire length
of the plane part. The other sides jointed to the first are made in two
pieces fitted the one in the other, as in the preceding, but sliding easily
in order to permit these transversal sides to lengthen and shorten as may
be required. Motion is given by a pinion fixed in the frame and by a
rack fixed on the plane part. The space comprised between the four
sides of the frame is filled either by wooden rules of about 12th of an
inch thick, or by india-rubber, or by any other material which may be
found suitable.
To use this apparatus the frame must be placed so that its sides are
perpendicular the one on the other, draw upon the rules the india-rubber
or other material the right-lined drawing which it is desired to put in
angle or perspective, and by turning the crank placed upon the axle of
the pinion, the desired angle of the drawing will be obtained whether
great or small.
This improved apparatus is illustrated on the annexed Sheet of
Drawing, but I would observe that the form therein shown may be
varied as well as the material composing the apparatus, and any suitable
mechanism be used for obtaining the angular parts, whether following a
curved or a broken line, or for other applications of this system.
SPECIFICATION in pursuance of the conditions of the Letters Patent, 3
filed by the said William Edward Gedge in the Great Seal Patent
Office on the 21st June 1873.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, WILLIAM
EDWARD GEDGE, of No. 11, Wellington Street, Strand, in the County
of Middlesex, Patent Agent, send greeting.
3

page_text: WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twenty-fourth day of December, in the
year of our Lord One thousand eight hundred and seventy-two, in the
thirty-sixth year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto me, the said William Edward Gedge, Her special
licence that I, the said William Edward Gedge, my executors, adminis-
trators, and assigns, or such others as I, the said William Edward
Gedge, my executors, administrators, and assigns, should at any time
agree with, and no others, from time to time and at all times thereafter
during the term therein expressed, should and lawfully might make
use, exercise, and vend, within the United Kingdom of Great Britain,
and Ireland, the Channel Islands, and Isle of Man, an Invention for
"A NEW OR IMPROVED APPARATUS OR DRAWING BOARD FOR OBTAINING ANGULAR
OR PERSPECTIVE DRAWINGS FROM RIGHT-LINE DRAWINGS," a communication to
me from abroad by Ernest Camus, of No. 64, Faubourg St. Martin, Paris,
France, upon the condition (amongst others) that I, the said William
Edward Gedge, my executors or administrators, by an instrument in
writing under my, or their, or one of their hands and seals, should par-
ticularly describe and ascertain the nature of the said Invention, and
in what manner the same was to be performed, and cause the same to be
filed in the Great Seal Patent Office within six calendar months next
and immediately after the date of the said Letters Patent.
NOW KNOW YE, that I, the said William Edward Gedge, do hereby
declare the nature of the said Invention, and in what manner the same
is to be performed, to be particularly described and ascertained in and
by the following statement :-
-
The object of this Invention is to remove the great difficulty which
draughtsmen have to overcome in transforming a right-lined ornamental
or other drawing into an oblique one.
In addition to the great difficulty in the skilful execution of this work
overcome by this apparatus, it also affords the advantage of a con-
siderable saving of time, for the drawing having been made upon this
apparatus a single turn of a crank is all that is required to put it at
twenty or fifty different angles giving absolutely geometrical views; that
which a draughtsman however skilful would not obtain in two days or
more is obtained by the use of this apparatus in a second, and with more
regularity

page_text: This apparatus is composed of a plane part upon which moves a frame,
the four sides of which are jointed two and two so that each of the angles
may be either very sharp or very obtuse. The frame moves in the direction
of the length of the plane part, and this latter is about 20 inches longer
than the frame. The sides of the frame which are in the direction of the
length are set to move with considerable friction in grooves of a double
dovetail form previously made in the entire length of the plane part.
The other sides jointed to the first are made in two pieces fitted the one
in the other as in the preceding, but sliding easily in order to permit
these transversal sides to lengthen and shorten as may be required.
Motion is given by a pinion fixed in the frame and by a rack fixed on
the plane part. The space comprised between the four sides of the frame
is filled either by wooden rules of about 1 of an inch thick or by
india-rubber, or by any other material which may be found suitable.
To use this apparatus the frame must be placed so that its sides are
perpendicular the one on the other, draw upon the rules the india rubber
or other material the right-lined drawing which it is desired to put in
angle or perspective; and by turning the crank placed upon the axle of
the pinion the desired angle of the drawing will be obtained whether
great or small.
This improved apparatus is illustrated on the annexed Sheet of
Drawing, but I would observe that the form therein shown may be
varied as well as the material composing the apparatus, and any suitable
mechanism be used for obtaining the angular parts whether following a
curved or a broken line or for other applications of this system.
In witness whereof, I, the said William Edward Gedge, have
hereunto set my hand and seal, this Twenty-first day of June,
in the year of our Lord One thousand eight hundred and seventy-
three.