Improved Vessel for Delivering Liquid in Drops, and Case therefor
Year: 1895

page_text: Date. of Application, 16th May, 1895-Accepted;. 22nd June, 1895
[Communicated from abroad by. Dr:. BLOKUSEWSKI, of. 76, Friedrichstrasse; Berlin,
Germany,, Doctor of Medicine.].
Improved Vessel for Delivering Liquid in Drops, and Case therefor:
1, CHARLES DENTON ABEL, of No. 28 Southampton Buildings, Chancery
Lane, in the County of London, Consulting Engineer and Chartered: Patent.
Agent, 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 an improved construction of vessel for delivering liquids.
in drops, which is more particularly intended for. medical purposes.
I will describe the construction with reference to the accompanying drawing in
which Fig. 1 shews a vertical section of the vessel.
The vessel a has at its upper end an opening for discharging the liquid, and at
the lower end c it has an inward projecting tube d which may either be cylindrical
or more or less tapering, and the extremity e-of which forms the air inlet' of the
vessel.
This vessel is only filled with. liquid to a certain height for the purposes of this
invention, such as to the dotted line x-x, and it is so proportioned that the level of
the liquid, in whatever position the vessel may be, shall'uever touch the opening e
of the tube d.
. The dotted line ¹¹ in the drawing indicates the level of the liquid when the vessel
is inverted and held in an inclined position.
The dotted line 2 on the other hand indicates the level of the liquid when the
vessel is held in a vertical inverted position.
As shewn at Fig. 1, it is impossible,, with a suitable. proportioning of the vessel a
and of its air tube d, for the liquid to escape through the opening e
In order to control the drop-wise delivery of the liquid from the vessel a at will!
the lower. end.thereof is covered with an elastic cap wbich may be of caoutchouc
and the bottom surface. c is so formed that an air space is produced between it and
the cap f.
If now, the vessel be inverted and a pressure be exerted-upon the-elastic cap so
as to compress the air in the said space, the contents can be discharged through b
drop by drop. On relieving the pressure on the cap f, air will enter the vessel
through bin proportion to the quantity of liquid discharged.
In order to prevent any escape of liquid by shaking & c., a caoutchouc cap m can
be fitted on the thickened end of the discharge nozzle b, or any other closing device
may be employed.
For enabling the vessel to be more conveniently carried about in the pocket,
it can be enclosed in a suitable case. Fig. 2 shews a construction of metal case in
which the vessel is enclosed, consisting of an upper part i and a lower part g that
are easily separated. If an opening / be formed in the bottom of the case, the
cap is made directly accessible to the pressure of the finger, so that the vessel
The vessel is
can be used without removing it from the lower part g of the case.
for this purpose made to fit with its elastic cap f more or less tightly into the case,
so that on inverting the latter after removal of the top, the vessel will be retained
therein, and the liquid can be expelled in one or more drops by pressing upon the
cap accessible through the opening h. In the top of the case is provided an

page_text: elastic disc k, of caoutchouc, cork, or the like, which serves to close the mouth b of
the vessel when the case is closed.
For imparting greater elasticity to the pressure of the disc k upon the mouth b,
a spring may be introduced behind the disc k. In order to render the same
case available for vessels slightly differing in length, the top i may be of rounded
form as shewn, so as to leave some space between the case and the disc k. When the
mouth b is closed by the above described means, the caoutchouc cap m Fig. 1 is of
course not required.
By enclosing the vessel in a protecting case as described in which it can be
used without removal therefrom, the vessel can be made of transparent glass
without fear of the liquid contents being deteriorated by the action of light, and
the operator is thus enabled at any time to see whether the liquid is pure.
The essential feature of the invention consists in the vessel itself, in its
characteristic construction; the case enclosing the same can be constructed in
various ways.
The construction shewn on the drawing is that which has been found to be most
convenient for use.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1. A vessel a for delivering liquid in drops wherein the bottom surface c has an
air tube d open at the end e, which projects inward to such a distance that when
the vessel contains a suitable quantity of liquid, the level hereof can in no
position of the vessel come in contact with the opening e, substantially as
described.
2. In combination with a vessel for delivering liquid of the kind referred to in the
first claim, the use of a cap f of elastic material fitted over the bottom c this being
so formed as to leave an air space between it and the cap, so that by pressing upon
the latter the air in such space will be compressed and will thus effect any desired
discharge of the liquid in drops, substantially as described.
3. The use in combination with the vessel referred to in Claims 1 and 2, of a
case whose lower part g has an opening which, on removal of the cover i, enables
the vessel to be used for the discharge of drops without removing it from the case,
substantially as described with reference to Fig. 2 of the drawings.
Dated this 16th day of May 1895.
ABEL & IMRAY,
Agents for the Applicant.