AN IMPROVED BOTTLE STOPPER
Year: 1884

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I, THOMAS MCDONALD of Griffin Cottage, Chapel House Street, Millwall in the
County of Middlesex, Pattern Maker, do hereby declare the nature of said invention
for "AN IMPROVED BOTTLE STOPPER". to be as follows:-
A bottle stopper according to this invention is made in the form of a cap of
circular form in horizontal section but surrounded externally with an enlargement
of polygonal form integral therewith. Within the mouth of the cap are two or
more inwardly projecting are shaped flanges or projections with inclined upper
edges arranged in such a manner that the space between each two extremities of
these projections is equal or nearly so to the said projections.
The inner surface of the top of the cap is also made with a central projection and
fixed with a cork scating that projects centrally so that each projection may enter
the mouth of the bottle neck.
This neck is provided with external projections corresponding to the arc-like
internal projections of the cap so that when the cap has been placed with its
central internal projection in the mouth of the bottle neck (its flanges having then
been passed through the spaces between the projections on the bottle neck). On
turning the cap in the proper direction the tops of its flanges or projections will
slide under those of the neck of the bottle, thus drawing the cap tightly down upon
the top of the bottle neck, securing it there and ensuring the hermetical closing of
the bottle.
The above described stopper may be manufactured of glass, china, earthenware,
wood, or other suitable material,

page_text: I, THOMAS MODONALD, of Griffin Cottage, Chapel House Street, Millwall, in the
County of Middlesex, Pattern Maker, do hereby declare the nature of my invention
for "AN IMPROVED BOTTLE STOPPER" and in what manner the same is to bo
performed, to be particularly described and ascertained in and by the following
statement:
A bottle stopper according to this invention is mado in the form of a cap of
circular form in horizontal section but surrounded externally with an enlargement
of polygonal form integral therewith. Within the mouth of the cap are two or
more inwardly projecting are shaped flanges or projections with inclined upper
edges arranged in such a manner that the space between each two extremities of
adjacent projections, is equal in length or nearly so to that of the said projections.
The inner surface of the top of the cap is also made with a central projection and
fitted with a cork seating that projects centrally so that such projection may enter
the mouth of the bottle neck. This neck is provided with external projections
corresponding to the arc like internal projections of the cap so that when the cap
bas been placed with its central internal projection in the mouth of the bottle neck
(its flanges having first been passed through the spaces between the projections on
the bottle neck), then on turning the cap in the proper direction, the tops of its
flanges or projections will slide under those of the neck of the bottle thus drawing
the cap tightly down upon the top of the bottle neck by a kind of wedge action,
securing it there, and ensuring the hermetical closing of the bottle.
Referring to the accompanying sheet of illustrative drawings Fig 1 is a vertical
section of a portion of a bottle neck having my improved bottle stopper applied
thereto; and, Fig is a similar view showing the bottle stopper in elevation.
Fig 3 is a side elevation of a portion of a bottle neck showing the projections
formed thereon and Fig 4 is a plan or top view of the same. Fig 5 is a sectional
underside view of the bottle mouth and stopper taken in the line A. B, and illustrates
the relative positions of the two before being interlocked by turning. The remaining
figure is hereinafter referred to.
a is the bottle stopper or cap provided internally with flanges or projections b,
which in the example shown in Figs 1 to 5 are three in number, the distanco
between any two adjacent projections being equal or nearly so to the length of one
of the said projections. c is a seating of flexible packing material such as cork
provided with a central projecting portion c¹ arranged to fit the mouth of the bottle
neck d. To prevent the seating falling out of the cap when the latter is removed
from the bottle, a washer or pad may be employed that fits into a recess in the
interior of the cap and below the said seating, or other suitable means may be
employed for the purpose. e, e are the external flanges or projections formed on the
bottle neck, and corresponding in number and relative position, with the internal
flanges or projections of the cap. The upper surfaces or edges b¹ of the projections b
and the lower surfaces or edges e¹ of the projections e are inclined with reference to
the top of the bottle neck. f is a polygonal enlargement on the cap a to facilitate
its being turned to secure it to the bottle neck or remove it therefrom. Fig 6
which is a similar view to Fig 5 shows the cap a and bottle neck d each provided

page_text: with two flanges or projections instead of three as above described. If the cap a
be placed upon the bottle neck d by passing the projections b through the spaces
between the projections e the portion c¹ of the seating e being within the bottle
mouth, then upon slightly turning the cap a in the direction indicated by the
arrows, the inclined upper surfaces or edges 6' of the projections b will be caused to
slide beneath the lower inclined surfaces or edges e of the projections e whereby
the cap with its seating will be drawn down tightly upon the top of the bottle neck,
securing it there, and effecting a gas tight closure therewith. If the cap be turned
in the opposite direction it may be easily and quickly removed from the bottle neck
whilst if the pressure of gas within the bottle be great, as is sometimes the case
with aerated liquors, then the cap may be slowly turned and the gas allowed to
escape, thereby preventing the contents of the bottle being spilt by the rapid
ebullition of the gas.
The above described stopper may be manufactured of glass, china, earthenware,
wood, or other suitable material.
.
Figs 7 and 8 show a modification, Fig 7 being a plan or top view of the bottle
neck, and Fig 8 an inverted plan of the cap-a is the stopper, or cap-b.bare its
internal projections, c is a seating of cork-e e are the external flanges or projections
on the bottle neck.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I would have it
understood that I do not claim generally forming the neck of a bottle with external
projections for holding a cap on to it, but I declare that what I claim is
1. The use with a bottle neck of the form shewn in Figs 3 and 4 of the stopper
shewn in Figs 1, 2 and 5 with polygonal enlargement, internal projections and
seating all as described.
2. The modification shewn in Fig 6.
3. The modification shewn in Fios 7 and 8