IMPROVEMENTS IN AIR TIGHT JARS AND OTHER SIMILAR RECEPTACLES
Year: 1884

page_text: I EDWIN JOHNSON of Roseville, Norman Grove, North Road Longsight Agent,
do hereby declare the nature of my said Invention for IMPROVEMENTS IN AIR
TIGHT JARS AND OTHER SIMILAR RECEPTACLES to be as follows:-
This invention relates to the construction of an air tight jar or other receptacle
of earthenware glass and other suitable material and specially suitable for the
preservation and protection of foods, preserves, fruits, meats, fish &c.
L
In carrying out my invention I form an annular rim or ledge inside the jar or
other receptacle upon which rests an india rubber ring-the lid is formed with a
similar annular surface and with two or more projections taking into slots formed
in the mouth of the jar above the india rubber ring and so that when inserted in
these slots the projections are capable of turning into side slots, after the manner
of a bayonet joint and thus by squeezing the india rubber between the two annular
surfaces an effectual air tight joint is produced.

page_text: I EDWIN JOHNSON, of Roseville Norman Grove North Road, Longsight—Agent,
do hereby declare the pature of my said Invention for "IMPROVEMENTS IN AIR
TIGHT JARS AND OTHER SIMILAR RECEPTACLES" 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 the construction of an air tight jar or other receptacle
of earthenware glass and other suitable material and specially suitable for the
preservation and protection of foods, preserves, fruits meats &°.
In carrying out my invention I form an annular rim or ledge inside the jar or
other receptacle upon which rests an india rubber ring-the lid is formed with a
similar annular surface and with two or more projections taking into slots formed
in the mouth of the jar above the india rubber ring and so that when inserted in
these slots the projections are capable of turning into side slots after the manner
of a bayonet joint and thus by squeezing the india rubber between the two annular
surfaces an efficient air tight joint is produced.
And in order that this my said invention may be more readily understood and
carried into practical effect I have hereunto annexed a sheet of drawings illustrative
of my improvements and will now proceed to describe the same with the assistance
of the reference of letters upon the several views.
Fig. 1 represents a front view partly in section and Fig. 2 is a plan of a narrow
mouth earthenware jar embracing my improvements Fig. 3 is a plan and Fig. 4 an
edge view of the cover appertaining to Figs. 1 and 2 shewn separately-Fig. 5 is
a perspective view of a wide mouthed jar and its cover also constructed in accordance
with my improvements.
In all the views a is an internal groove formed near the top edge of the jar
and b b are a pair of recesses or openings leading into the same. The lid o which
is constructed of earthenware or glass is arranged with a pair of projections & d
corresponding in form with the openings 6 b so that in placing the lid in position
such projections pass through such openings and thus permit the lid c to rest direct
upon the india rubber or other elastic washer e. It will now be apparent that if
the upper edge of the groove a is inclined slightly downwards in the direction of
the arrows seen in Fig. 2 that by turning the lid in the same direction.it will
tighten upon the intervening elastic ring e and so secure the lid in position in a
perfectly air-tight manner and this without the use of paper, parchment or other
covering material.
In this manner I construct a jar from which the contents can be removed at
pleasure and which can be readily closed up again and a further advantage claimed
for this invention so that no metal is employed in its construction and that being
manufactured entirely of glass or earthenware, preserved fruits, jams, marmalade,
butter, cream & are by its use preserved pure and wholesome. Instead of the
projections d d being formed upon the earthenware lid they might be constructed
upon a metal plate to be inserted above the lid but this I should consider to be a
modification of my invention.
Having thus particularly described and ascertained the nature of this my said
invention I declare that what I claim is :-
The construction entirely in earthenware glass or other similar material of air
tight jars and other similar receptacles with an internal groove formed with openings

page_text: to receive corresponding projections upon the lid or upon a metal plate above the
lid and which lid is capable of being tightened in position and rendered air tight
by the application of an elastic washer substantially as herein before described and
illustrated on the accompanying drawings.
Dated 11 Desemba 100A.
JOHN G. WILSON,
Agent for Applicant.