Improvements in Wheel Drawing-pens.
Year: 1892

page_text: Switzerland),
Date of Application (in United Kingdom), 11th Apr., 1892
Complete Specification Left, 11th Jan., 1893-Accepted, 25th Mar., 1893
PROVISIONAL SPECIFICATION.
Improvements in Wheel Drawing-pens.
I, ADOLPHE PROSPER EGGIS, of 10 Grand Fontaine, Fribourg, in Switzer-
and, Merchant, do hereby declare the nature of this invention to be as follows:-
My invention relates to improvements in wheel drawing-pens for drawing or
tracing dotted or broken lines, but which pens are likewise so disposed as to work
in a continuous and perfectly regular manner that is to say for drawing full lines.
The only resemblance to the well known instruments of this kind, consists in the
use of a truckle or rowel the rim of which is shaped according to the character of
line required. But my improved instrument is characterised, on the one hand, by
a continuous inking device hitherto not employed for this purpose, and on the other
hand, by a construction which enables the truckle or rowel, as well as the inking
device, to be very easily and quickly changed.
In the accompanying drawings:
Fig. 1 is a front elevation of the improved instrument; and Fig. 2 is a side view
of the same but with the handle removed.
and
Figs. 3, 4, and 5 show to an enlarged scale, constructive details of the instrument,
Fig. 6 shows some examples of the lines the instrument is intended to produce.
Fig. 7 shows separately the plate A of the instrument.
In all the figures, the same letters refer to the same parts.
A is a plate, the rear-end A' of which may be adjusted, if desired in a handle B
of any suitable shape (Fig. 1) or in a pair of compasses. C is a shaped truckle or
rowel which is free to turn on a pivot D (Fig. 5) fixed to the plate A, and which
can be replaced by a differently shaped rowel by simply removing the screw-
button D E is an inking roller, preferably made of two metallic discs el, e²,
between which is provided a piece of felt e, or its equivalent, charged with colour
(aniline ink or the like). The inking roller E turns freely upon a pivot f, fixed to
an arm F. The latter is connected to the plate A by means of a pivot f¹. To
remove the inking roller E it is only necessary to unscrew the screw button G.
There is also provided a spring H, fixed by means of a screw h, to the plate A, and
which engages in a suitable notch formed in the tubular axis of the arm F so that
its tension acting in the direction of the arrow i presses the arm F in the direction
of the arrow m, that is to say causes the inking roller E to be pressed against the
shaped truckle or rowel C. When this latter is rolled with slight pressure over
the paper, it turns and thereby causes the inking roller E to be likewise turned and
to supply the truckle or rowel C in a continuous and regular manner with the
required ink for drawing or tracing the line. The character of the lines will vary
according to the shape of the rowel C employed, and may be for instance of one of
the forms shown in Fig. 6.

page_text: The plate A is preferably provided with a suitable opening A" in order to reduce
the friction of the inking roller E against the plate A.
Dated this 11th day of April 1892.
ERNEST DE PASS,
Chartered Patent Agent,
78, Fleet Street, London, and 6, Victoria Street, Nottingham,
Agent for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Wheel Drawing-pens.
1, ADOLPHE PROSPER EGGIS, of 10 Grand Fontaine, Fribourg, in Switzer-
land, Merchant, do hereby declare the nature of this invertion and in what manner
the same is to be performed, to be particularly described and ascertained in and
by the following statement, reference being had to the accompanying drawings and
to the letters and figures marked thereon, that is to say :-
My invention relates to improvements in wheel drawing pens, for drawing or
tracing dotted or broken lines, but which pens are likewise so disposed as to work
in a continuous and perfectly regular manner, that is to say for drawing full lines.
The only resemblance to the well known instruments of this kind consists in the
use of a truckle or rowel, the rim of which is shaped according to the character of
lines required. But my improved instrument is characterised, on the one hand, by
a continuous inking device, hitherto not employed for this purpose, and on the
other, by a construction which enables the truckle or rowel, as well as the inking
device, to be very easily and quickly changed.
In the drawings filed with my Provisional Specification
Fig. 1 is a front elevation of the improved instrument, and Fig. 2 is a side view
of the same, but with the handle removed.
Figs. 3, 4, and 5 show, to an enlarged scale, constructive details of the instru-
ment, and
Fig. 6 shows some examples of the lines the instrument is intended to produce.
Fig. 7 shows separately the plate A of the instrument.
In all the figures the same letters refer to the same parts.
A is a plate, the rear end A¹ of which may be adjusted, if desired, in a handle B,
of any suitable shape, (Fig. 1) or in a pair of compasses. C is a shaped truckle
or rowel which is free to turn on a pivot D (Fig. 5) fixed to the plate A, and
which can be replaced by a differently shaped rowel by simply removing the screw
button D¹. E is an inking roller, preferably made of two metallic discs e¹, e³,
between which is provided a piece of felt e, or its equivalent, charged with color
(aniline ink, or the like). The inking roller E turns freely upon a pivot f, fixed
to an arm F. The latter is connected to the plate A by means of a pivot f³.
To remove the inking roller E, it is only necessary to unscrew the screw button G.
There is also provided a spring H, fixed by means of a screw h, to the plate A and
which engages in a suitable notch formed in the tubular axis of the arm F so
that its tension, acting in the direction of the arrow i, presses the arm F in the
direction of the arrow m, that is to say, causes the inking roller E to be pressed
against the shaped truckle or rowel C. When this latter is rolled with slight
pressure over the paper, it turns, and thereby causes the inking roller E to be
likewise turned and to supply the truckle or rowel C in a continuous and regular
manner with the required ink for drawing or tracing the line. The character of the
lines will vary according to the shape of the rowel C employed, and may be, for
instance, of one of the forms shown in Fig. 6.
The plate A is preferably provided with a suitable opening A" in order to
reduce the friction of the inking roller E against the plate A.
Instead of the arm carrying the inking roller being arranged to pivot or rock,

page_text: it may be arranged to slide in the manner shown with reference to Figs. 8 to 12
of the accompanying drawings, which illustrate modified constructions of the
drawing pen, and in which :-
Fig. 8 is a front elevation, Fig. 9 a similar view, but with the inking roller in its
withdrawn position, and Fig. 10 a side elevation of Fig. 8, partly in section.
Figs. 11 and 12 are front elevations of a further modified construction.
In all these figures, the rocking arm F is replaced by a sliding piece F', guided
by two lugs or projections a' on the plate A which carries the inking roller E, as
in Figs. 8 to 10, or by two screws a³, as in Figs. 11 and 12, said sliding piece F¹
being acted upon by a spring H¹ to keep the inking roller E normally pressed
against the rowel C. When the rowel is to be exchanged, as above stated with
reference to the first mentioned construction, the sliding piece F1 is withdrawn, as
shown in Figs. 9 and 12, and retained in its withdrawn position by bringing its
notch into engagement with one of the projections a¹, or screws a³, of the
plate A as shown in Figs. 9 and 12, until the exchange has been effected.
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. The improved instrument with automatic continuous inking, for tracing dotted
and broken lines, in technical or other drawings, and for tracing single or double
continuous lines, staves in music, etc., consisting in the combination of the inter-
changeable rowel C having its pivot D fixed to a plate A and provided with a
screw nut or button D¹ to secure said rowel on the pivot D, and of the arm or
lever F having its tubular axis maintained on the pivot f¹ by means of a screw
nut F and pin engaging in the central hole of the inking roller E, and with a
spring H acting upon said arm or lever F, substantially as and for the purpose
specified.
2. The improved wheel drawing pen, with automatic continuous inking, substan-
tially as described and shown with reference to the annexed drawings.
Dated this 11th day of January 1893.
ERNEST DE PASS,
Chartered Patent Agent,
78, Fleet Street, London, and 6, Victoria Street, Nottingham,
Agent for the Applicant.