Improvements in Reservoir Pen Holders.
Year: 1897

page_text: Date of Application, 5th Nov., 1897
Improvements in Reservoir Pen Holders.
I, WILLIAM THOMAS SHAW, of the Firm of Thomas De La Rue & Co. Ld.,
of 110, Bunhill Row, in the City of London, Manufacturers, do hereby declare
the nature of this invention to be as follows;-
This invention relates to improvements in the pen-holder shown at Figure 14
of the drawings of my former Specification No. 6398 of 1891.
The upper part of the tubular reservoir with the valve and valve rod are un-
altered but the plug at the lower end of the reservoir is made in two parts the
outer one of which is tubular screwing into the end of the reservoir and forming
the valve seat. The inner part fits within the outer part its end coming against
a ridge or shoulder inside the latter.
Between the inner and outer parts a space is left at one place to receive the nib.
The face of the inner part next the nib has a longitudinal slot in it running from
its upper end almost down to the point of a tapering projection extending beyond
the outer part. This slot forms the ink duct.
A small air hole is made leading diagonally from the outside to the slot its
outer end being close to the lower end of the outer part.
Improvements in Reservoir Pen Holders.
I, WILLIAM THOMAS SHAW, of the Firm of Thomas De La Rue & Co. Ld.,
of 110, Bunhill Row, in the City of London, Manufacturers, do hereby declare
the nature of this invention and in what manner the same is to be performed
to be particularly described and ascertained in and by the following statement:
This invention relates to reservoir pen-holders for ordinary nibs.
Figure 1 is a central longitudinal section of the holder, and Figure 2 is an
elevation of the inner part of the plug.
The upper part of the tubular reservoir a with the valve b, valve rod b', and
the screw cap 62 fixed to and operating the valve rod, are of ordinary construction,
but the plug at the lower end of the reservoir is made in two parts c and d the
outer one c of which is tubular, screwing into the end of the reservoir and forming
the valve seat. The inner part d fits within the outer part c, its end coming
against a ridge or shoulder el inside the latter.

page_text: Between the inner and outer parts a space is left at one place to receive the
nib The face of the inner part d next the nib has a longitudinal slot d¹ in it
running from its upper end almost down to the point of a tapering projection
extending beyond the outer part. This slot forms the ink duct.
A small air hole is made leading diagonally from the outside to the slot its
outer end being close to the lower end of the outer part c.
To fill the pen holder it is only necessary to unscrew the part c and remove
it with the part d and nib e together from the reservoir and introduce ink into the
latter by an ordinary feeder.
When in use the parts are in the relative positions shown in Figure 1 and
the ink flows past the valve b through the tube c and along the groove to the
underside of the nib being prevented by surface tension from escaping at the
hole ². As the ink is consumed a partial vacuum is formed in the reservoir a
and air is drawn in through the hole ².
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 combination of a reservoir, a tube at its lower end opening into it, and a
solid feed bar, whose end fits into the tube, and which has a longitudinal groove
in its top surface, running from its upper end nearly to its lower end, and an air
hole leading from its under surface into the groove.
2. The combination of a reservoir, a tubular plug at its lower end, a valve seat
at the upper end of the plug, a valve above the seat, and a solid feed bar whose
end fits into the plug, and which has a longitudinal groove in its top surface
running from its upper end nearly to its lower end, and an air hole leading from
its under surface into the groove.
3. The combination of a reservoir, a tubular plug at its lower end, a valve seat
at the upper end of the plug, a valve above the seat, a shoulder inside the plug,
and a solid feed bar whose end fits into the plug and abuts against the shoulder,
and which has a longitudinal groove in its top surface running from its upper end
nearly to its lower end, and an air hole leading from its under surface into the
groove.