IMPROVEMENTS IN INDIA-RUBBER PIECES FOR INFANTS' FEEDING BOTTLES, WITH A CONTRIVANCE ADMITTING AIR
Year: 1878

page_text: LETTERS PATENT to Gerard Wenzeslaus von Nawrocki, of the Firm of J. Brandt
and G. W. von Nawrocki, Berlin, Leipzigerstrasse, 124, German Empire, for
the Invention of "IMPROVEMENTS IN INDIA-RUBBER PIECES FOR INFANTS'
FEEDING BOTTLES, WITH A CONTRIVANCE ADMITTING AIR." A communication
from Emile Siebenlist, of Berlin, Prussia, German Empire.
PROVISIONAL SPECIFICATION left by the said Gerard Wenzeslaus von
Nawrocki at the Office of the Commissioners of Patents on the 27th April
1878.
GERARD WENZESLAUS VON NAWROCKI, of the Firm of J. Brandt and G. W. von
Nawrocki, Berlin, Leipzigerstrasse, 124, German Empire. "IMPROVEMENTS IN
INDIA-RUBBER PIECES FOR INFANTS' FEEDING BOTTLES, WITH A CONTRIVANCE
ADMITTING AIR."
German Empire.)
(A communication from Emile Siebenlist of Berlin, Prussia,
The india-rubber nipple pieces used for infants' feeding bottles have the defect
that they easily collapse when sucking through them, by reason of the rare-
faction of the air therein, thus preventing the flow of the milk or other fluid
therethrough.
The object of this Invention is to remedy this defect. For this purpose air is
supplied to the interior of the nipple by means of a fine india-rubber tube cemented
to the lower outside part of the nipple, and communicating with the interior through
a fine opening, by preference at or about the middle of the height of the nipple; the
other end of this tube is closed, but there pierced with one or two very fine air holes
not permitting fluid to pass through; the tube may be wound or twisted in a coil,
in order to narrow the passage through it to a minimum.
While using it, the nipple is placed on the bottle, so that the air inlet is just
above the edge of the neck, the air tube may also be bent or pressed upwards.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Gerard Wenzeslaus von Nawrocki in the Great Seal Patent Office
on the 26th October 1878.
GERARD WENZESLAUS VON NAWROCKI, of the Firm of J. Brandt and G. W. von
Nawrocki, Berlin, Leipzigerstrasse, 124, German Empire. "IMPROVEMENTS IN
INDIA-RUBBER PIECES FOR INFANTS' FEEDING BOTTLES, WITH A CONTRIVANCE
ADMITTING AIR." (A communication from Emile Siebenlist, of Berlin, Prussia,
German Empire.)
The india-rubber nipple pieces used for infants' feeding bottles have the defect
that they easily collapse when sucking through them, by reason of the rare-
faction of the air therein, thus preventing the flow of the milk or other fluid
therethrough.
The object of this Invention is to remedy this defect. For this purpose air is
supplied to the interior of the nipple by means of a fine india-rubber tube cemented
to the lower outside part of the nipple, and communicating with the interior through
a fine opening, by preference, at or about the middle of the height of the nipple; the
other end of this tube is closed, but there pierced with one or two very fine air
holes, not permitting fluid to pass through; the tube may be wound or twisted in
order to narrow the passage through it to a minimum.
While using it the nipple is placed on the bottle, so that the air inlet is just above
the edge of the neck; the air tube may also be bent or pressed upwards.
Figure 1 of the accompanying Drawings is a side view of a nipple piece con-
structed according to this Invention; Figure 2 is a vertical section through same;
Figure 3, an end view, and Figure 4 a horizontal section.
a is a small tube serving to conduct a small quantity of air to the interior of the
nipple piece A, to the outer lower part of which it is fastened at one end, while its
other end terminates at b; near its lower end it has a fine aperture for air
admission.
The opening at 6 is so fine that no fluid can enter the tube d therethrough, and
for this purpose the tube a is also coiled double, as shown, but the configuration or
form of the tube may be varied as desired.
By the air admission the sucking action is also facilitated.
And having thus described and ascertained the nature of this Invention, I declare
that I claim, the application to a feeding bottle nipple piece of an air admission tube
as and for the purposes set forth.
In witness whereof, I, the said Gerard Wenzeslaus von Nawrocki, have here-
unto set my hand and seal, this Twenty-third day of October, in the year of
our Lord One thousand eight hundred and seventy-eight.
GERARD WENZESLAUS v. NAWROCKI. (L.S.)