Improvements in Devices for Delivering Measured Quantities of Liquid.
Year: 1896

page_text: Date of Application, 19th Oct., 1896
Complete Specification Left, 19th July, 1897-Accepted, 21st Aug., 1897
PROVISIONAL SPECIFICATION.
Improvements in Devices for Delivering Measured Quantities of
Liquid.
I, JULIUS RHEINBERG, of 32 Snow Hill, in the County of London, do hereby
declare the nature of this invention to be as follows:-
This invention relates to devices for delivering measured quantities of liquid
from a bottle or other vessel, the liquid delivered being displaced by air passed
into the vessel by means of a piston or plunger.
For the purposes of my invention I provide the containing vessel with an outlet
tube for the passage of the liquid to be delivered and with another tube or cylinder
communicating with the interior of the said vessel and fitted with a piston or
plunger whereby a definite quantity of air can be passed into the vessel and a
corresponding volume of liquid thereby displaced and delivered through
the outlet tube. As applied to a bottle for example the inlet tube for air
and the outlet tube for the liquid may be conveniently inserted through
the cork in an air-tight manner. The quantity of liquid delivered
depends on the diameter of the measuring cylinder and the distance
through which the piston is moved, and the cylinder or the stem of the
piston may be graduated in any suitable manner to show the extent of movement
of the piston required to deliver any desired quantity of liquid. An adjustable
stop may be provided to regulate the distance through which the piston or plunger
can be moved so as to provide for mechanically delivering any desired quantity
of liquid less than the full capacity of the measuring vessel. The measuring
cylinder is conveniently made of glass so that the movement of the piston may be
seen. Before passing the air into the containing vessel to displace the liquid the
said vessel is turned so that the outlet tube is sealed by the liquid and so that the
liquid does not require to be lifted in order to be discharged. Consequently when
the piston is pushed inward and air passed into the vessel the liquid is displaced
without being put under pressure and the volume of liquid delivered is precisely
the same as that of the air passed in.
It should be observed that the outlet tube or the mouth thereof is a
ciently small to prevent the escape of the liquid until air is introduced by the
piston as above described.
The device used as above described is very suitable for application to medicine
bottles for delivering medicine inasmuch as the liquid does not enter the
measuring chamber and the latter therefore remains unsoiled. The device can
however be used in such a manner as to draw the liquid into the measuring
chamber where the soiling of said chamber is of no consequence. When liquid
is so drawn into the measuring chamber the action of pushing in the piston again
will expel such liquid and operate in the same manner as when air is forced
into the vessel so delivering from the vessel a corresponding quantity of liquid.
It is so obvious that the device can be used for delivering drops of liquid with
certainty and precision. My invention will be found very useful by photographers

page_text: and others for delivering or drawing off chemicals and it is generally applicable
to most cases where liquids are required to be delivered or drawn off from a vessel
in definite or measured quantities.
In some instances the outlet tube for the liquid and the inlet tube for the air
may communicate with a common tube, or even one tube may serve for both
admitting air and allowing the liquid to escape.
Dated this 10th day of October 1896:
HASELTINE, LAKE & Co.,
45 Southampton Buildings, London, W.C., Agents for the Applicant.
Improvements in Devices for Delivering Measured Quantities of
Liquid.
I, JULIUS RHEINBERG, of 32 Snow Hill, in the County of London, 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:-
This invention relates to improvements in devices for delivering measured
quantities of liquid from bottles or other analogous vessels.
For the purpose of my invention I provide the bottle or other vessel with a
cylinder or tube preferably of glass fitted with a piston or plunger. This cylinder
or tube is so arranged that it can be filled with air, or with liquid from the bottle,
by drawing back the piston, and this air or liquid can on the piston being moved
in the opposite direction be forced back into the bottle, so displacing its own volume
of liquid therefrom.
To enable definite quantities of liquid to be displaced or withdrawn from the
bottle, the cylinder is graduated and an adjustable stop may also be provided on
the stem of the piston.
In order that my said invention may be clearly understood and readily carried
into effect I will proceed to describe the same fully by aid of the accompanying
drawing, which shews in vertical section a medicine bottle provided with one
construction of my improved device for delivering measured quantities of liquid.
a is the body of the bottle, the cork or like stopper a of which is provided with
an outlet tube a. b is the cylinder of the measuring device which is graduated
as shown and has a tapering portion or nozzle 6' passing through and secured in the
cork a¹. It will be observed that both the tube a3 and nozzle b¹ terminate flush
or practically so with the under surface of the cork a¹. c is the piston of the said
cylinder, which piston may be of any suitable construction but in the example
shown consists of a layer of packing material held between a pair of metal discs c¹
secured on a screw-threaded stem provided with a knob or button c³. At its
upper end the cylinder is closed by a cork or plug d provided with a central
aperture through which the stem can pass easily. e is the adjustable stop for
limiting the inward movement of the piston. This stop consists of a metal disc
adapted to be screwed to and fro upon the stem 2 to bring it to the required
position.
The improved measuring device is used as follows:-
While the bottle is in an upright position the piston c is drawn up to the top
of the cylinder 6 until its lower surface comes on a level with the zero line. The
bottle is then turned on its side or partially inverted until the level of the liquid
covers and seals the end of the outlet tube a2, and so that the liquid does not

page_text: require to be raised in order to be discharged. Consequently when the piston is
pushed inward, air is forced into the bottle, the liquid is displaced without such
air being put under pressure, and the volume of liquid delivered is precisely the
same as that of the air forced in, which latter is measured by the graduation on
the cylinder.
It should be observed that the outlet tube or the mouth thereof is made sufficiently
small to prevent the escape of the liquid until air is introduced by the piston as
above described; that is to say, no liquid can escape from the outlet tube, however
the bottle may be tilted, except when the piston of the cylinder is actually being
moved.
The device above described is very suitable for application to medicine bottles
for delivering medicine inasmuch as the liquid does not enter the measuring
cylinder and the latter therefore remains unsoiled. The said device can however
be used in such a manner as to draw the liquid into the measuring cylinder where
the soiling of said chamber is of no consequence. When liquid is so drawn into
the measuring cylinder the action of pushing in the piston again will expel such
liquid and operate in the same manner as when air is forced into the vessel so
delivering from the vessel a corresponding quantity of liquid. It is also obvious
that the device can be used for delivering drops of liquid with certainty and
precision if the piston be pushed in sufficiently slowly. My invention will be
found very useful to photographers and others for delivering or drawing off chem-
icals and it is generally applicable to most cases where liquids are required to
be delivered or drawn off from a vessel in definite or measured quantities.
In some instances the outlet tube for the liquid and the inlet tube for the air
may communicate with a common tube, or even one tube may serve for both
admitting air and allowing the liquid to escape.
Furthermore, instead of graduating the cylinder I may graduate the stem c
of the piston c especially if the latter be formed of glass after the manner of
those of an ordinary syringe.
Having now particularly described and ascertained the nature of my said in-
vention and in what manner the same is to be performed, I 'declare that what I
claim is:-
1. A device for delivering measured quantities of liquid from bottles or similar
vessels, comprising a cylinder and a piston in combination with an outlet tube,
these parts being so arranged that the discharge of the liquid can only take place
when the bottle or vessel is tilted and the piston is pushed in, substantially as
described.
2. A. device for delivering measured quantities of liquid from medicine bottles
or similar vessels, substantially as described, with reference to the accompanying
drawing.
HASELTINE, LAKE & Co.,
45 Southampton Buildings, London, W.C., Agents for the Applicant.