AN IMPROVED SELF-SUPPLYING PEN
Year: 1868

page_text: PROVISIONAL SPECIFICATION left by George Davies at the Office
of the Commissioners of Patents, with his Petition, on the
10th January 1868.-A communication from abroad by Antoine
Edouard Brisbart-Gobert, of Paris.
I, GEORGE DAVIES, of No. 1, Serle Street, Lincoln's Inn, in the
County of Middlesex, and No. 87, St. Vincent Street, in the City of
Glasgow, Civil Engineer and Patent Agent, do hereby declare the
nature of the said Invention for "AN IMPROVED SELF-SUPPLYING PEN,"
(a communication to me from abroad by Antoine Edouard Brisbart-
Gobert, of Paris), to be as follows:-
The fundamental principle of this Invention consists in the application
of a physical effect whereby a tube plunged into water and then with-
drawn and closed hermetically is caused to retain in suspension all the
liquid introduced, which can only escape in proportion as air is allowed
To obtain this effect the Inventor employs an arrangement
of valves which admits of the spontaneous introduction of air in a very
small quantity, an essential condition in order to allow only a very small
quantity of ink to escape at a time. The introduction of the air presses
out the ink with force, and to regulate and counteract this effect the
Paine d

page_text: pass
Inventor employs a particular arrangement which causes the ink to
in a circuitous route through openings arranged in such a manner
as to offer a resistance to its exit. The air which is contained in the
interior of the pen is expanded or increased in volume by the heat of
the hand, and hence exerts a pressure which forces the ink to issue
unnecessarily, and to remedy this inconvenience the Inventor proposes
to make or cover the exterior of the pen with a material non-conductive
of heat. The pen itself may be made of metal, glass, or other suitable
material and of various forms and sizes. The ink to be employed may
or less liquid, and as it occasionally forms a deposit which
would necessarily close the small opening of the pen and hence render
the effect uncertain, the Inventor employs an arrangement whereby the
pen can be made to clean itself at will so as always to keep it in a
state to act with certainty. The pen is composed principally of a tube
of metal or other suitable material, the upper end of which is closed by
a movable stopper, in the centre of which is a valve which may be
opened and closed from time to time, as may be required to admit a
small portion of air above the ink. Inside the tube are fixed two or
more discs or partitions having only one small hole in each, the said
holes being eccentric as regards each other, that is to say, not one over
the other. The lower end of the tube has a short piece of smaller tube
inserted therein which passes down partly inside the nib, and in the side
of which is a small hole through which the ink can flow in a small
quantity at a time to the inside of the nib. Inside this smaller tube
is fitted a movable plug which is solid at each end, but is partly cut
away at back and front so as to leave a kind of midfeather, through
which there is a small opening for the ink corresponding with the
opening in the side of the tube. By moving this plug up or down
the flow of the ink can be regulated or stopped altogether, and in
case of any corrosion or other obstruction to the supply of ink the
plug may be withdrawn and the passages cleaned out.

page_text: PROVISIONAL SPECIFICATION left by George Davies at the Office
of the Commissioners of Patents, with his Petition, on the
10th January 1868.-A communication from abroad by Antoine
Edouard Brisbart-Gobert, of Paris.
I, GEORGE DAVIES, of No. 1, Serle Street, Lincoln's Inn, in the
County of Middlesex, and No. 87, St. Vincent Street, in the City of
Glasgow, Civil Engineer and Patent Agent, do hereby declare the
nature of the said Invention for "AN IMPROVED SELF-SUPPLYING PEN,"
(a communication to me from abroad by Antoine Edouard Brisbart-
Gobert, of Paris), to be as follows:-
The fundamental.principle of this Invention consists in the application
of a physical effect whereby a tube plunged into water and then with-
drawn and closed hermetically is caused to retain in suspension all the
liquid introduced, which can only escape in proportion as air is allowed
to enter. To obtain this effect the Inventor employs an arrangement
of valves which admits of the spontaneous introduction of air in a very
small quantity, an essential condition in order to allow only a very small
quantity of ink to escape at a time. The introduction of the air presses
out the ink with force, and to regulate and counteract this effect the

page_text: Inventor employs a particular arrangement which causes the ink to
pass in a circuitous route through openings arranged in such a manner
as to offer a resistance to its exit. The air which is contained in the
interior of the pen is expanded or increased in volume by the heat of
the hand, and hence exerts a pressure which forces the ink to issue
unnecessarily, and to remedy this inconvenience the Inventor proposes
to make or cover the exterior of the pen with a material non-conductive
of heat. The pen itself may be made of metal, glass, or other suitable
material and of various forms and sizes. The ink to be employed may
be more or less liquid, and as it occasionally forms a deposit which
would necessarily close the small opening of the pen and hence render
the effect uncertain, the Inventor employs an arrangement whereby the
pen can be made to clean itself at will so as always to keep it in a
state to act with certainty. The pen is composed principally of a tube
of metal or other suitable material, the upper end of which is closed by
a movable stopper, in the centre of which is a valve which may be
opened and closed from time to time, as may be required to admit a
small portion of air above the ink. Inside the tube are fixed two or
more discs or partitions having only one small hole in each, the said
holes being eccentric as regards each other, that is to say, not one over
the other. The lower end of the tube has a short piece of smaller tube
inserted therein which passes down partly inside the nib, and in the side
of which is a small hole through which the ink can flow in a small
quantity at a time to the inside of the nib. Inside this smaller tube
is fitted a movable plug which is solid at each end, but is partly cut
away at back and front so as to leave a kind of midfeather, through
which there is a small opening for the ink corresponding with the
opening in the side of the tube. By moving this plug up or down
the flow of the ink can be regulated or stopped altogether, and in
case of any corrosion or other obstruction to the supply of ink the
plug may be withdrawn and the passages cleaned out.