Improved Airtight Cover for Jars and similar Vessels.
Year: 1890

page_text: COMPLETE SPECIFICATION.
Improved Airtight Cover for Jars and similar Vessels.
We WILHELM MEISSNER, Tinsmith and JOHANN RIBBACH Metal ware Manufac-
turer both of Prinzessinnen Strasse 29 Berlin in the German Empire do hereby
declare the nature of this invention, and in what manner the same is to he
performed, to be particularly described and ascertained in and by the following
statement:-
Our invention relates to airtight covers for jars and similar vessels and consists in
an improved arrangement or construction of said covers by means of which the cover
can be readily fixed air tight to jars and other vessels or receptacles without said
jars or other vessels having to be specially arranged for fastening the cover to them,
as is the case with other arrangements for closing jars or vessels airtight, so that our
improved cover can be used for closing airtight any vessel or receptacle having a
circular or oval orifice if made of corresponding shape and size. Our arrangement
further allows the cover to be easily removed and thoroughly cleaned in all
its parts.
On the drawing appended hereunto
Figure 1 shows a sectional view of our improved cover opened or only loosely put
upon the vessel.
Figure 2 the same when closed.
Figure 3 a top view of the closed cover.
Figure 4 a side view of the cover partly in section with the packing ring removed
and in the opened and closed positions.
Figures 5 and 6 details.
The cover consists of the lid or stopper A. hereinafter called lid the lower edge of
which projects so as to form a flange a upon which the elastic packing ring B. rests,
or has a similar flange attached to it. Near to the upper surface of the lid A. two
diametrically opposite holes or recesses are formed into which the ends or pivots b.
of the semi circular locking handle C. are entered. These ends or pivots are not
in the same plane as the handle but are formed on the bent up ends bas
shown on figures 4 and 5, these ends b¹ forming short levers or cranks on the
fulcrums b. The handle is further bent up in the middle part at d. Surrounding
the lid A. a movable faucet shaped ring D is arranged, which can slide on A. with its
lower part the cylindrical portion fitting behind the packing ring B and the lower
flange compressing the ring when pushed down. The upper part of the ring D fits
into the opening of the vessel and rests upon the vessel with its top flange.
When the cover is to be fixed in the vessel E. figures 1 and 2 the handle is turned
so that the bend d rests upon the ring D in the position shewn in dotted line on
figure 4.
The packing ring B then lies flat against the circumference of A. and
holds the sliding ring D up as shewn on figure 2. The cover having been inserted
into the orifice of the vessel E. the handle is turned over on its pivots b. to the
opposite side as indicated by arrows on figure 4. The cranks b¹ of the handle C. are
thereby pressed upon the sliding ring D and the lid A. is drawn up, doubling up the
packing ring B and pressing it outwards so that it makes an airtight joint against the
vessel E. and the flanges of the lid A. and ring D as shewn on figure 1 and in full
lines on figure 4. The bend d in the handle is directed upwards in this position
of the handle and serves for lifting it again when the cover is to be removed.
The cranks or levers 6 are so arranged that they are beyond their dead centres as
shewn by figure 4 when the cover is fixed so that an automatic loosening of the
cover is prevented. This position of the handle may be further secured by forming
it a little eccentrical to the ring D so that its ends have to be compressed into
the faucet of the ring and are held there by the springing of the handle.
When the cover has to be removed the handle C. is lifted by the part d. into a

page_text: vertical position; the cranks b₁ are thereby removed from the ring D so that the
packing ring B is released and, while depressing the lid A., returns into its original
position shewn on figure 1 when the cover can be removed by the handle C. The
handle also facilitates removal of. the cover if the packing ring should stick to the
vessel.
The cover can be easily taken to pieces by springing the pivots b. out of their
sockets and removing the handle C when the rings D and B can be taken off the
lid A. and all parts thoroughly cleaned or a new packing ring put in.
The cover may be made of any material possessing sufficient stiffness and not
affected by the chemical action of the materials enclosed in the vessel. In place of
the handle C. any other suitable equivalent device for drawing up the lid A. and
compressing the ring B may be applied.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what
we claim is
Firstly. The general arrangement of airtight cover for jars and similar vessels
substantially as hereinbefore described and illustrated by the drawings.
Secondly. In airtight covers for jars and similar vessels the arrangement of a
flanged lid or stopper A. sliding in a flanged ring D and an elastic packing ring
between the flanges of A. and D in combination with devices for drawing said flanges
together and thereby pressing the elastic ring against the sides of the orifice of the
jar or similar vessel substantially as hereinbefore described.
Thirdly. In combination with a flanged lid or stopper A. sliding in a flanged
ring D and an elastic ring B between the flanges of A. and D a semi circular
handle C. with cranks b¹ and pivots & for drawing said flanges together and fixing
the cover substantially as hereinbefore described and illustrated by the drawings.
Dated this 17th day of February 1890.
EMMOTT & Co.,
Agents for the Applicants.