Improvements in and connected with Screw Bottle Stoppers.
Year: 1895

page_text: Date of Application, 14th Feb., 1895
Complete Specification Left, 14th Nov., 1895-Accepted, 14th Dec., 1895
PROVISIONAL. SPECIFICATION.
Improvements in and connected with Screw Bottle Stoppers.
I, ANDREW CAMPBELL, of 136,. Amburst Road, Stoke Newington, in the
County of Middlesex, Gentleman, do hereby declare the nature of this invention
to be as follows:-
This invention relates to improvements in that description of bottle stoppers
known as Barrett's screw stopper, which consists of a plug of hardened india-rubber
composition, or other suitable material, having a screw thread formed on its outer
surface, adapted to engage with a similar thread formed on the interior surface of
the neck of the bottle, a tight joint being obtained by means of a soft india-rubber
ring, which, by the action of the screw, is-compressed between an enlarged head of
the screw plug and the top of the neck of the bottle.
For many purposes this forms an excellent stopper, but its use is to some extent
limited by reason of the liquid in the bottle-being in more or less continuous contact
with the hardened india-rubber, or other material of which the plug is composed,
and also with the beforementioned soft india rubber ring.
The object of my invention is to provide a stopper, which, while retaining the
advantages of the above described well-known form of screw stopper, shall obviate
the disadvantage above referred to.
For this purpose I form a hole of any suitable shape in the centre of the screw
plug, and into this hole I force by any suitable means, a cork (preferably-of the
ordinary cylindrical shape) in such a manner as to leave a portion thereof
projecting from the under side of the said screw plug. This projecting portion of
the cork will naturally expand to approximately the same diameter as that of the
screwed portion of the plug, and the cork will take the form, more or less, of a
mushroom, the stem of the mushroom being compressed within the hole in the
1 form
plug, and the head projecting and expanding at the under side thereof.
the interior of the neck of the bottle with a screw thread in the usual manner,
and below such screw-thread I provide a suitably shaped annular projection or
ledge, which, when the plug is screwed home, forms, with the mushroom head of
the cork, a secure and liquid-tight joint.
In order to strengthen the screw plug, the before mentioned hole may be lined
by a tube of metal or other suitable material, and in some cases the cork may be
shaped, by cutting or otherwise, so as to enable it to be fitted to the tube and valve
face with the application of less force than would be necessary were it uniformly
cylindrical as in the case first above described. Or the cork may be attached or
applied to the plug in any other suitable manner.
It will be understood that according to this invention, while all the advantages
of the screw plug or stopper are retained, the soft rubber ring is dispensed with,
and no other materials than glass and cork are brought into contact with the liquid
contained in the bottle.
Dated this 14th day of February 1895.

page_text: Improvements in and connected with Screw Bottle Stoppers.
1, ANDREW CAMPBELL, of 136 Amhurst Road, Stoke Newington, in the
County of Middlesex, Gentleman, 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 improvements in that description of bottle stoppers
*known as Barrett's screw stopper, which consists of a plug of hardened indiarubber
composition, or other suitable material, having a screw thread formed on its outer
surface, adapted to engage with a similar thread formed on the interior surface of
the neck of the bottle, a tight joint being obtained by means of a soft indiarubber
ring, which, by the action of the screw, is compressed between an enlarged head of
the screw plug and the top of the neck of the bottle.
For many purposes this forms an excellent stopper, but its use is to some extent
limited by reason of the liquid in the bottle being in more or less continuous
contact with the hardened indiarubber, or other material, of which the plug is
composed, and also with the beforementioned soft indiarubber ring.
The object of my invention is to provide a stopper, which, while retaining the
advantages of the above described well known form of screw stopper, shall obviate
the disadvantage above referred to.
For this purpose I employ the arrangement shown in the accompanying drawing,
which is a section of the neck of a bottle with a screw stopper having my invention
applied thereto.
thereof
1 form a hole A, of any suitable shape, through the centre of the screw plug B,
and into this hole I force, by any suitable means, a cork C (preferably of the
ordinary cylindrical shape) in such manner as to leave a portion C
projecting from the under side of the said screw plug B. This projecting portion
of the cork will naturally expand to approximately the same diameter as that of
the screwed portion of the plug, and will take the form, more or less, of a mush-
room, the stem of the mushroom being compressed within the hole A in the plug B,
and the head projecting and expanding at the under side, as shown in the drawing.
I form the interior of the neck of the bottle D with a screw thread in the usual
manner, and below such screw thread I provide a suitably shaped annular projection
or ledge E, which, when the plug B is screwed home, forms, with the mushroom
head of the cork, a secure and liquid-tight joint.
In order to strengthen the screw plug, and to enable it better to resist the
outward pressure of the compressed cork the hole A may be lined with a tube of
metal or other suitable material F, shown in dotted lines in the drawing, and in
some cases the cork may be shaped, by cutting or otherwise, so as to enable it to
be inserted into the hole, and to close against the projection or ledge E in the
bottle, by the application of less force than is necessary when the cork is uniformly
cylindrical, as in the case first above described.
It will be understood that according to this invention, while all the advantages
of the screw plug or stopper are retained, the soft rubber ring is dispensed with,
and no other materials than glass and cork are brought into contact with the liquid
contained in the bottle.
.
Having now particularly described and ascertained the nature of the said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
First. The improved screw bottle stopper which consists of a screw plug having
a hole through the centre, and a cork inserted in the said hole in such manner as to
..

page_text: projecting portion being adapted to make a liquid-tight joint with the inside of the
neck of the bottle, substantially as described.
Second. In the improved bottle stopper herein described, the use of a lining of
metal or other suitable material, inserted in the central hole for the purpose of
strengthening the plug, and enabling it better to resist the outward pressure of the
compressed cork, substantially as described.
Dated this 14th day of November 1905
A. CAMPBELL,
Per W. H. Beck,
115 Cannon Street, London, E.C., Agent.