An Improved Closing Device for Jars and the like.
Year: 1897

page_text: Date of Application, 25th June, 1897-Accepted, 25th June, 1898
An Improved Closing Device for Jars and the like.
I, HARRY JOHNSON, of 55, Lydford Road, St. Peter's Park, Paddington, in the
County of London, Tobacco Merchant, do hereby declare the nature of this inven-
tion 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 an improved device for closing the mouth of a jar
or like receptacle and comprises a stopper which, whilst it can be readily placed
in or removed from position, closes the jar in a thoroughly air-tight manner.
In carrying out this invention a stopper is constructed of two rigid discs
arranged to be drawn together by a screw and nut, so as to compress a hollow
elastic ring engaged between their edges, and force it into a groove in the neck
of the receptacle so as to form an air-tight joint.
In the accompanying drawings
Fig. 1 is a perspective view of a stopper constructed according to this inven-
tion and
Fig. 2 is a vertical section of such a stopper in position in the neck of a jar.
Like letters indicate like parts in both figures.
The stopper A comprises the discs B, C formed of any rigid material, such
as earthenware, metal, wood or the like, and a hollow clastic ring D preferably
of rubber.
The discs B, C, form an easy fit in the neck E of the jar, and are provided
with central corresponding holes to receive the screw bolt G, preferably formed
with a square head Glet into the correspondingly shaped portion of the hole
in the disc C, and provided with an elastic or other washer so as to form an air-
tight joint with disc C.
The bolt G is operated by a nut H which may be of any convenient or orna-
mental shape readily turned by hand. A washer H' may be provided and if
desired a lock nut may be provided to prevent the nut H being accidentally
loosened.
The disc C has a flanged edge C to rest on an annular projection or stop E'
formed between the neck and body F of the jar. On the upper side it is formed
with a peripheral groove C to partly receive the hollow ring D. When uncom
pressed the ring D projects vertically above the surface of the disc C, but forms
a circle of the same external diameter as shown in Figure 2. The disc B is
formed with a downwardly projecting flange B' which rests on the hollow
ring D, and the flange is preferably formed with a slight bevel from within
outwards, as shown in Figure 2. The neck E of the jar has an internal groove E²
so placed as to correspond with the ring D when the stopper is in position. The
stopper can be readily placed in or withdrawn from the neck of a jar when the
discs and ring are in the relative positions shown in the figures. In turning
the nut H on the screw bolt G, the flanges B of the disc B compress the hollow
ring D, forcing it against the neck E and into the groove E so as to form a
perfectly air-tight joint to the jar.

page_text: Having now particularly described and ascertained the nature of the said
invention, and in what manner the same is to be performed, I declare that what
I claim is:-
-
1. A closing device for a jar or the like comprising discs B C, with screw bolt
and nut GH, and a hollow clastic ring D capable of compression between the
said discs, so as to engage a groove in the jar neck substantially as described.
2. In a closing device for a jar or the like the combination of a disc such
as C, having a peripheral recess such as C to carry the elastic ring D, and a
flange such as C; with an internal stop E substantially as and for the purpose
described and illustrated in the accompanying drawings.
3. In a closing device for a jar or the like making a tight joint between the
mouth of a jar or similar vessel and a stopper by squeezing out an elastic ring
so as to engage in a groove or channel or underneath a projecting face in the
mouth substantially as described.
4. The complete closing device substantially as described and illustrated in the
accompanying drawings.