Improvements in Fountain-pens.
Year: 1899

page_text: Date of Application, 28th Jan., 1899-Accepted, 18th Mar., 1899
COMPLETE SPECIFICATION.
Improvements in Fountain-pens.
I, EDUARD REISERT, of 23, Frankfurterstrasse, Hennef-Sieg, in the Province of
the Rhine, in the Kingdom of Prussia, German Empire, Engineer, do hereby
declare the nature of this invention, and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement;-
My invention refers to fountain pens, but more particularly to certain com-
binations and arrangements of the parts thereof, as fully described hereinafter.
Reference being made to the accompanying drawing in which:
Figure 1 is a vertical longitudinal section of a fountain-pen embodying my
invention.
Figure 2 is a vertical section of a modification thereof.
Figure 3 is a vertical section of a second modification.
Figure 4 is a vertical section of a third modification.
Figure 5 is a vertical section of a fourth modification.
In the form of construction represented in Figure 1 a branch a is conveyed
to the pen without being in communication with the interior of the reservoir 2¹.
The elastic chamber a¹ is formed by a part of the tube which extends along the
outside of the reservoir and has a mouth breaching into said reservoir near to
the bottom of the latter. Elastic rings cc, preferably made of india rubber
surround the tube at and respectively. The double-armed lever made
of some elastic material such as steel spring or the like, and attached to the
holder at f rests upon the rings c c¹ and extends along the outside of chamber a¹.
When pressure is applied to the lower arm of lever the communication at d is
interrupted and the ink contained in chamber a¹ is forced through the opening
at to the branch a and from there to the pen.
The modification shown in Figure 2 may be called, in a certain sense, the
reverse of the form just explained. The one branch a² of the tube is situated
in the interior of the reservoir 22 and finishes exactly at the bottom of the latter.
The other branch containing the elastic chamber a³ extends along the outside
of the reservoir. Elastic rings & surround the tube at de d³ respectively. The
said rings are arranged in such a manner that the chamber a³ is in communica-
tion with the branch a at d³, and that the tube is tightly closed at d³ when the
ink is not allowed to pass to the pen. The elastic lever g which is rigidly attached
to the holder at f¹ rests upon the ring and extends along the outside of
chamber. If pressure is applied to the lever g the ring is compressed so
that the communication of chamber a³ with the interior of reservoir 2 is cut off.
If, now, the pressure is continued, the walls of chamber a³ are likewise compressed.
The ink contained in this chamber causes the ring to expand and flows through
the opening thus formed at d down to the pen. As soon as the pressure on
lever ceases, the opening at is shut, and the communication at d³ is reestab-
lished so that fresh ink can enter the chamber ³. The refilling of chamber a³
will always take place, even when the level of the ink-in the reservoir is near to

page_text: the bottom, since the tube forms a siphon which discharges underneath
the bottom of the reservoir. This form of construction has the great advantage
that almost the whole of the holder can be used as a reservoir as the elastic
chamber a is arranged on the side of the holder.
In Figure I have shown a form of construction which is operated in the
following manner. The spring g which is fixed at exerts a pressure on the
lower part of the double-armed lever k, the latter being fulcrummed at n. Thus
the bent end of lever is pressed at against the india-rubber tube m and closes
the same.
The top portion of lever k is operated by means of lever o which
is fixed to the reservoir at p. If pressure is applied to the lever o the passage q
becomes closed, while the pipe m remains closed, owing to the play which is
arranged between the lower end o of lever o and the top end of lever k. If
still more pressure is applied to the lever o the lower end o¹ presses against the
top end of the double-armed lever k, and raises its lower end, thus permitting
the ink to pass to the pen through the pipe m.
In the form of construction shown in Figure 4 the upper arm of the double-
armed lever is elongated to form the lever r. This lever is provided with a
piece which is always in contact with the elastic chamber at.
A most simple form of construction is shown in Figure 5. The elastic cham-
ber a forms again a part of the tube, but is arranged underneath the reservoir.
The rings c¹ of Figure 1 are dispensed with. Their action is accomplished by
the projecting ends ss of the pressing piece t, which is provided with a button t
for receiving the thumb of the writing hand. This button is nearer to the end s
than to the end s. When the ink is not allowed to pass to the pen the opening
at do is shut, while a continual communication with the reservoir it is entertained
the communication at d' is inter-
at d. If pressure is applied to the button
rupted, and the walls of chamber a5 are compressed, so that the ink contained in
this chamber is forced to leave the latter. As now, the button t¹ is nearer to the
ends than to the end s¹, the pressure exercised at d³ is greater than at d*. In
consequence, the ink flows through the opening d to the pen.
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. In a fountain-pen, the combination with the reservoir for the ink and the
pen proper, of an elastic chamber interposed between said reservoir and pen, the
chamber forming part of the tube and being arranged on the side of the holder,
the mouth breaching into the reservoir, a double-armed lever g the one arm of
which is adapted to compress the chamber, and means such as elastic rings c c¹ for
temporarily shutting the chamber at the bottom or at the top respectively as and
for the purpose set forth.
2. In a modification of the fountain pen claimed in Claim 1, the combination
with the reservoir for the ink and the pen proper, of an elastic chamber interposed
between said reservoir and pen, the chamber forming part of the tube and being
arranged on the side of the holder, a branch a² of the hose reaching into the
reservoir, a lever g¹ for compressing the chamber and means such as elastic
rings for temporarily shutting the chamber, at the top or at the bottom
respectively, as and for the purpose set forth.
3. In a modification of the fountain-pen as set forth in the preceding claims the
combination with the reservoir for the ink and the pen proper, of an elastic
chamber interposed between said reservoir and pen, a lever adapted to be pressed
against the said elastic chamber, a second lever or arm of a lever adapted to he
withdrawn by the first lever and a spring for pressing the said second lever or arm
of a lever against the tube substantially as and for the purpose set forth.
4. In a modification of the fountain-pen as set forth in Claim 1, the combination
with the reservoir for the ink and the pen proper, of an elastic chamber inter-
posed between said reservoir and pen, and a pressing piece t extending along the

page_text: chamber, and means such as projecting ends ss for temporarily shutting the
chamber at the bottom or at the top respectively, as and for the purpose set forth.
Dated this 28th day of January 1899.
GEO. THOS. HYDE,
1, Broad Street Buildings, Liverpool Street, London, E.C.,
Agent for the Applicant.