IMPROVEMENTS IN DRAWING PENS
Year: 1872

page_text: LETTERS PATENT to Edward Primerose Howard Vaughan, F.C.S., of
54, Chancery Lane, in the County of Middlesex, Patent Agent,
for the Invention of "IMPROVEMENTS IN DRAWING PENS."-A com-
munication from abroad by Eugène Daguin, residing at Paris, in
the Republic of France.
Sealed the 18th May 1873, and dated the 18th November 1872.
PROVISIONAL SPECIFICATION left by the said Edward Primerose
Howard Vaughan at the Office of the Commissioners of Patents,
with his Petition, on the 18th November 1872.
I, EDWARD PRIMEROSE HOWARD VAUGHAN, F.C.S., of 54, Chancery
Lane, in the County of Middlesex, Patent Agent, do hereby declare the
nature of the said Invention for "IMPROVEMENTS IN DRAWING PENS," being a
communication to me from abroad by Eugène Daguin, residing at Paris,
in the Republic of France, to be as follows:-
The object of these improvements is to enable fine, thick, or tapered
lines to be executed by the drawing pen at one stroke without recourse
to the setting screws usually employed for varying the opening of the
nibs.

page_text: Figure 1 of the accompanying Drawing is a front view of a compass
pen constructed according to this Invention. Figure 2 is a cross section
of the same through the line A, B, Fig. 1.
Figure 3 is a front view of a pen for tracing straight lines.
a', 6', are flattened portions of the branches a, b, twisted in opposite &
directions to each other, and inclined at an angle of from thirty to forty-
five degrees to the plane, passing by the axes of the pressure screw, as
indicated in Fig. 2. These flattened parts are sufficiently thin to bend
or spring under slight pressure, thus causing the tracing points to open
more or less like the slit nib of the common writing pen, and to close 1
again according as the pressure is removed. c is a screw for adjusting
the separation of the branches to the maximum thickness of the lines to
be traced, which, when required, may be tapered off to the finest point
by varying the pressure of the hand; d is the screw by which the points
are set to the minimum thickness of line to be traced. For the 1
execution of thick straight lines the branch 6 is fitted with a rigid bar ƒ,
Fig. 3, which acting as guide against the rule 9 allows the point of the
pen to open freely to the required extent.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Edward Primerose Howard Vaughan, in the Great 2
Seal Patent Office on the 17th May 1873.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, EDWARD
PRIMEROSE HOWard Vaughan, F.C.S., of 54, Chancery Lane, in the
County of Middlesex, Patent Agent, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her 2
Letters Patent, bearing date the Eighteenth day of November, 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 Edward Primerose Howard Vaughan, Her
special licence that I, the said Edward Primerose Howard Vaughan, my {
executors, administrators, and assigns, or such others as I, the said
Edward Primerose Howard Vaughan, 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

page_text: lawfully might make, use, exercise, and vend, within the United. King.
dom of Great Britain and Ireland, the:Channel Islands, and Isle of Man,
an Invention for "IMPROVEMENTS IN DRAWING PENS," being a communication
to me from abroad. by Eugène. Daguin, residing at Paris, in the Republic
5 of France, upon the condition (amongst others) that. I, the said Edward
Primerose Howard Vaughan, my executors or administrators,, by an
instrument in writing under my, or their, or one of their hands-and
seals, should particularly describe and ascertain the nature of the said
Invention, and in what manner the same was to be performed, and
O 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 Edward Primerose Howard Vaughan,
do hereby declare the nature of the said Invention, and in what manner
5 the same is to be performed, to be particularly described and ascertained
in and by the following statement, reference being had to the Drawings
hereunto annexed, and to the figures and letters marked thereon, that is
to say :-
The object of these. improvements is to enable fine, thick, or tapered
O lines to be executed by the drawing pen at one stroke, without recourse
to the setting screws usually employed for varying the opening of the
nibs.
Figure 1 of the accompanying Drawings is a front view of a compass
pen constructed according to this Invention. Figure 2 is a cross section
5 through the line A, B, Fig. 1.
Figure 3 is a front view of a pen for tracing straight lines; Figure 4
is a modification of the same.
•
a², b¹, are flattened portions of the branches a, b, twisted in opposite
directions to each other, and inclined at an angle of from thirty to forty-
0 five degrees to the plane, passing by the axes of the pressure screw, as
indicated in Figure 2. These flattened parts are sufficiently thin to
bend or spring under slight pressure, thus causing the tracing points to
open more or less, like the slit nibs of the common writing pen, and
to close again according as the pressure is removed. c is a screw for
5 adjusting the separation of the branches to the maximum thickness of
the lines to be traced, which, when required, may be tapered off to the
finest point by varying the pressure of the hand; d is the screw by

page_text: which the points are set to the minimum thickness of line to be traced.
For the execution of thick straight lines the branch 6 is fitted with a
rigid bar f, Fig. 3, which acting as guide against the rule g allows the
point of the pen to open freely to the required extent.
"
The pen above described may be converted into an ordinary drawing &
pen by removing the screw c and using the screw d for the adjustment
of the points.
Figure 4 represents a modification of the above arrangement, by which
the twist of the branches, as also the guide bar f, may be dispensed with
in straight line pens. In this modification the outer branch a is thinned 1
down at the point g, and on the setting screw h is mounted between the
branches a tapped disc k. The separation of the nibs and consequently
the depth of the thickest line to be traced is adjusted by the screw
For fine lines the branches are pressed between the fingers
until a comes in contact with the central disc k, the position of which 1
determines the maximum separation of the nibs.
nut m.
Having now described and ascertained the nature of the said Inven-
tion, and the manner of carrying it into effect, I declare that what I
claim and desired to protect by Letters Patent is, the formation on or
application to drawing pens of a thin blade or spring a¹, 6', constructed 2
and arranged substantially as and for the purpose herein set forth and
shewn in the Figures of the accompanying Drawings.
In witness whereof, I, the said Edward Primerose Howard Vaughan,
have hereunto set my hand and seal, this Seventeenth day of
May, in the year of our Lord One thousand eight hundred and a
seventy-three..