IMPROVEMENTS IN AND RELATING TO POCKET AND OTHER FOUNTAIN PENS OR WRITING IMPLEMENTS CARRYING THEIR OWN WRITING FLUID
Year: 1879

page_text: PROVISIONAL SPECIFICATION left by Samuel Wylde at the Office of the
Commissioners of Patents on the 15th January 1879. A communication from
abroad by Herman Walke, of Hamilton, in the State of Ohio.
SAMUEL WYLDE, junior, of 323, High Holborn, in the County of Middlesex.
"IMPROVEMENTS IN AND RELATING TO POCKET AND OTHER FOUNTAIN PENS OR
WRITING IMPLEMENTS CARRYING THEIR OWN WRITING FLUID." A communication
from abroad by Herman Walke, of Hamilton, in the State of Ohio.
The object of this Invention is the construction of a pen or writing implement
which may be carried in the pocket, which shall carry sufficient ink or other
writing fluid to last for several hours continuous writing, and shall be always
ready for use at any moment, one method of carrying it out being as follows:-
The body or holder is preferably constructed of hard rubber, vulcanite, or other
suitable substance hollow throughout its length, but the hole contracted or jointed
at its upper end to the size of a small internal tube of similar material (called the
air tube) connected to it there, and extending through it and a short distance
beyond. This tube may be formed of one or more pieces. At the lower end of the
air tube a number (preferably four) of small arms project to retain it in the centre
of the end piece, which is screwed or otherwise attached to the lower end of the
body or holder. The free end of this air tube is reduced in size, and only a fine
hole left through the end, into and through which passes the needle which supplies
the ink or other fluid. This needle is preferably composed of iridium upon a basis
of platinum (though I do not bind myself to these materials) tapering gradually
towards the point. Its thicker end is inserted in the fine hole in the end of the
air tube, and carried out through a fine slot in the side; it thus comes in contact
with a little spiral spring of gold or other suitable material, which will stand the
action of the acids in the writing fluid. The end piece, previously mentioned and
constructed of the same material as the body, is reduced in size towards its outer
end, and terminates in a nozzle or point having a fine hole through it for the
needle to pass through, the said nozzle being composed of similar material to the
needle itself. In the upper or lower small internal or air tube is a small hole to
allow of the passage of air. A cap screws on to the upper end of the piece fitted
into the body or holder, which when screwed tight up is practically air tight, and
keeps the fluid from passing down the needle. flat is made upon the thread of
the screwed piece, so that when the cap is partly unscrewed a connection is formed
between the air in the internal tube and the outer air, thus allowing the fluid to
flow down the needle when required. Another little cap fits tightly over the point

page_text: of the end piece to prevent damage when not in use, and small holes are provided
in this to allow the air to escape when this cap is being put on.
This instrument can be used by unscrewing the lower end piece, filling partially
or entirely the body with writing fluid, replacing the end piece, removing the little
cap upon the end piece, and slightly unscrewing the cap upon the top end of the
body so as to admit air.
These directions being carried out the instrument is ready for use.