Improvements relating to Internal Bottle Stoppers.
Year: 1898

page_text: PROVISIONAL SPECIFICATION.
Improvements relating to Internal Bottle Stoppers.
I, JOHN FORSfaw, Junior, of 31, Crosby Road, Seaforth, Liverpool, Bottle
Stopper Manufacturer, do hereby declare the nature of this invention to be as
follows:-
This invention relates to internal stoppers for bottles, in which the weight
which causes them to fall into the bottle mouth in the process of bottling aerated
liquids, is a leaden ball which is free to roll in a cavity which extends from end
to end of the stopper. Such cavity is bored from one end of the stopper but
does not penetrate the other end, which remains solid. Hence, after the ball is
inserted, only one end of the stopper remains to be closed. This is accomplished
by forming a tapered recess or countersink in the wall of the cavity, extending
a short distance inwardly from the orifice to be closed. The greatest diameter of
such recess is at its inward end, its diameter diminishing therefrom to the orifice.
Into such recessed orifice of the cavity a plug of some suitable expanding or
filling material, such as cork, is forced. Such plug expands within the recess,
its edge abutting against the inner end of the recess, which-being of larger
diameter than the bore of the cavity-forms a shoulder. The said shoulder there-
fore prevents the plug from being thrust further into the cavity, whilst the tapered
formation of the recess prevents the plug from coming out of the stopper.
J. A. COUBROUGH,
Registered Patent Agent (Qual. by Exam.),
10, St. George's Crescent, Liverpool,
Agent for the Applicant.
Improvements relating to Internal Bottle Stoppers.
I, JOHN FORSILAW, Junior, of 31, Crosby Road, Seaforth, Liverpool, Manu-
facturer, 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 internal stoppers for bottles, in which the weight
which causes them to fall into the bottle mouth in the process of bottling aerated
liquids, is a leaden ball which is free to roll in a cavity which extends from end
to end of the stopper. Such cavity is bored from one end of the stopper, but

page_text: does not penetrate the other end, which remains solid. Hence after the ball is
inserted, only one end of the stopper remains to be closed. This is accomplished
by forming a tapered recess or countersink in the wall of the cavity extending
a short distance inwardly from the orifice to be closed. The greatest diameter of
such recess is at its inward end, its diameter diminishing therefrom to the orifice.
Into such recessed orifice of the cavity 'a plug of some suitable expanding or
filling material is forced. Such plug expands within the recess, its edge abutting
against the inner end of the recess which-being of larger diameter than the bore
of the cavity forms a shoulder. The said shoulder therefore prevents the plug
from being thrust further into the cavity, whilst the tapered formation of the
recess prevents the plug from coming out of the stopper.
The drawing hereto annexed illustrates a section of a stopper of the type herein
referred to. a is the cavity in which the weight p is disposed. Such cavity is
bored from the end c, and around the cavity there is formed at this end a tapered
or conical recess d. The orifice of such recess may be about the same diameter
as the cavity itself, but as the recess widens within the stopper a shoulder e is
formed. After the weight p has been inserted in the cavity a, a plug f is inserted
in the recess d. Such plug must be formed of a material having the following
characteristics, namely, it must be capable of expansion within the recess d, and
it must be sufficiently hard to withstand the pressure exerted by the various
implements used in opening aerated water-bottles. I have found in practice that
the most suitable material to be used is poplar wood, or woods of a similar fibre.
I take a perfectly dried cylindrical piece of poplar or similar wood, slightly longer
and larger than the orifice of the recess a. This is then put through a compressing
machine which reduces it to such a size as to enter the orifice of the recess a and
to rest upon the shoulder e. When in this position the cylindrical piece of wood
is moistened and immediately expands and fills the recess a. Should a portion
of the piece of poplar or other wood protrude beyond the outer end of the orifice
it is cut off with a saw or on a lathe or by any other such means.
It will thus be
seen that the plug f is immovable in either direction, namely the tapered forma-
tion of the recess d prevents its withdrawal whilst the shoulder e prevents it from
being forced further into the cavity of the stopper.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what
I claim is
As a means of closing the cavity in a bottle-stopper of the type herein specified,
the formation in the wall of the said cavity-and at the orifice thereof-of a
tapered recess or countersink, whereby a shoulder is formed in said cavity, and
the insertion into said recessed orifice of a plug of suitable material, such as poplar
wood, which is expanded within said recess, whereby it is prevented by the tapered
formation of said recess from escaping therefrom, whilst the said shoulder prevents
it from being thrust further into the cavity; substantially as described with
reference to the drawings.
T
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2011
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J. A. COUBROUGH,
Chartered Patent Agent, 10, St. George's Crescent, Liverpool,
Agent for the Applicant.