A Metallic Box or Case with Interlocking Air-tight Cover, for Storing Articles of Food, Tobacco and the like.
Year: 1899

page_text: Date of Application, 18th Oct., 1899
Complete Specification Left, 21st Nov., 1899-Accepted, 23rd Dec., 1899
PROVISIONAL SPECIFICATION.
A Metallic Box or Case with Interlocking Air-tight Cover, for Storing
Articles of Food, Tobacco and the like.
We, ALFRED LOVELL, and GEORGE FINCKEN, Engineers, both of Hanham Road,
Kingswood, near Bristol, do hereby declare the nature of this invention to be
as follows:-
We construct a metallic box or case, to the top of which is soldered a ring
having an annular depression or groove, at the bottom of which is placed a ring of.
india rubber or other compressible substance, the inner wall or side of this annular
groove is inverted or turned downwards into the box or case, forming a bead, and
on this inverted edge is formed two wings, one opposite the other diametrically,
inclining in reverse directions towards the bottom of the box or case in the shape
of a wedge.
This box or case is provided with a loose cover, having on its inner surface an
annular projection whose mean diameter is the same as that of the annular depres-
sion or groove in the ring before referred to, and of such shape that it fits into the
said annular depression or groove, the cover is also dished in the centre and has
fixed to its underside a cross-bar, the ends of which, when the cover is placed on
the box or case and turned to the right hand for about one quarter revolution,
are brought into contact with the inclined edges of the two wedge shaped wings
previously referred to, this has the effect of drawing the cover downwards, when
the annular projection on the cover compresses the rubber ring, until the surface
of the said annular projection is in frictional contact with the sides of the annular
depression or groove in the ring fixed to the top of the box or case, when the
two become locked, making, with the assistance of the rubber ring, an air tight
joint or seal.
To open the tin, the cover is turned to the left hand, holding the box or case
stationary, this disengages the ends of the crossbar on the cover, by causing them
to slide off the wedge shaped wings, and thereby releases the compression on the
rubber ring, the cover may then be lifted off.
1000
ALFRED LOVELL,
GEORGE FINCKEN.
A Metallic Box or Case with Interlocking Air-tight Cover, for Storing
Articles of Food, Tobacco and the like.
We, ALFRED LOVELL and GEORGE FINCKEN, Engineers, both of Hanham Road,
Kingswood, near Bristol, do hereby declare the nature of this invention and in
SPQ77

page_text: what manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement:-
This invention relates to a metallic box or case, so constructed that the loose
cover may be locked thereto forming an air tight joint or seal for preserving the
contents with the advantage that the said box or case may be opened and re-sealed
again at convenience, and will be best understood by reference to the accompany-
ing drawings in which-
Fig. 1 is a view partly in section shewing box or case with cover locked or
sealed ready to be sent out.
Fig. 2 is a plan projected from Fig. 1.
Fig. 3 is a view of the box or case partly in section, with cover in position
preparatory to locking or sealing.
Fig. 4 is a cross section of the loose cover.
Fig. 5 is a sectional view of grooved ring round the top of box or case, over
which the loose cover fits.
Fig. 6 is a plan shewing alternative form for grooved ring round top of box or
case.
Fig. 7 shews an alternative form of loose cover.
Like letters of reference represent similar parts through out the drawings.
A box or case constructed in accordance with this invention is made with a
contracted top as shewn, to which is fixed a ring A, (clearly shewn in Fig. 5),
having an annular depression or groove B, at the bottom of this depression or
groove we place a ring C of india rubber or other compressible substance, further
the inner wall or side of the annular depression or groove B after being carried
up to the same plane as or level with the top of the ring, is curled over and
inverted or turned downwards, like a bead, and on this inverted edge is formed
two wedge shaped wings E, one each opposite the other diametrically, with their
inclined edges running in reverse directions.
+
We provide for the box or case a loose cover F, clearly shewn in Fig. 4, this
cover has on its inner surface an annular projection or ring G, whose mean
diameter is the same as that of the annular depression or groove B in the ring A,
this annular projection or ring G being of such a shape that when the loose cover F
is pressed home the projecting ring G on its underside fits into the annular depres-
sion or groove B in the ring A-this loose cover F is also dished or recessed in the
centre, and has fixed to its underside a crossbar I, which in conjunction with the
wedge shaped wings E on the beforementioned ring A, is provided for the pur-
pose of locking the loose cover F in position in the manner hereinafter described,
and thereby sealing the box or case.
The loose cover F fits over the top or neck of the box or case and is first placed
in the position shewn by Fig. 3, when the ends of the before mentioned crossbar I
drop through two pockets or recesses J in the grooved ring A, and stand just below
the inverted edge of the said grooved ring upon which the wedge shaped wings E
are formed--the position of these two pockets or recesses J is at right angles to
the wedge shaped wings E. With the loose cover F in this position the apex of
the annular projection G rests upon the rubber ring C at the bottom of the annular
groove B in the ring A but the surface of the said annular projection G is not in
contact with the sides of the annular groove B.
To seal the box or case, the loose cover F after being placed in the position shewn
by Fig. 3, is turned to the right hand for about one quarter revolution, the box
or case being held stationery, this revolution of the cover F brings the ends of the
crossbar I attached thereto into contact with the inclined edges of the wedge shaped
wings E on the grooved ring A, which as before stated is fixed to the top or neck
of the box or case, by continuing to turn the loose cover F in the direction indi-
cated, the ends of the crossbar I being still in contact with the inclined edges of
the wedge shaped wings E, the cover F is drawn downwards as in Fig. 1, the apex
of the annular projection G on its underside compressing the rubber ring C and

page_text: the surface of the said annular projection G being at the same time brought into
frictional contact with the sides of the annular groove B in the ring A, when they
become locked and assisted by the compressed rubber ring C make an air tight
joint or seal.
Το open or unseal the box or case, the loose cover F is turned to the left hand,
the body of the box or case being held stationery, this causes the ends of the cross-
bar I to slide off the inclined edges of the wedge shaped wings E, thereby releasing
the pressure on the rubber ring C in the annular groove B, and allowing the
cover to rise slightly, this reverse motion of the cover is continued until the
ends of the crossbar I are immediately under and in line with the pockets or
recesses J in the ring A, where a suitable stop is placed the cover F may then be
lifted off giving full access to the contents of the box or case, should only a portion
of the contents be required, it may be re sealed in the manner before indicated
with the same facility and security as when first packed and sent out.
Instead of making the grooved ring A with a circular opening in the centre,
and with 2 pockets or recesses J as shewn by dotted lines Fig. 2, this ring may
be made of the form shewn by Fig. 6, that is to say, it would have an annular
groove B exactly as in Fig. 5 with its inner edge curled over or inverted, but the
said inverted inner edge would have two flats thereon as K. Fig. 6, one opposite
the other diametrically and on the inverted edge of each of these two flats K a.
wedge shaped wing as E Fig. 5 would be formed, the inclined edge of the one
wing running in a reverse direction to the other as indicated by arrow- -by making
the grooved ring A of the form above mentioned the pockets or recesses J pre-
viously referred to, would be dispensed with, the crossbar I on the loose cover F
being made of such a length as to just pass through the largest diameter of the
opening, see dotted line Fig. 6, and by revolving the cover F the ends of the said
crossbar I would immediately they passed under the inverted edge of the flats K,
come into contact with the inclined edges of the wedge shaped wings E thereon,
drawing the cover down tight in the manner previously described.
Instead of making the loose cover F with a dish or recess in the centre as in
Fig. 4, it may be made of the form shewn by Fig. 7, that is with a flat surface
from the inner corner or shoulder of the projecting ring G, in which case the cross-
bar I would be bent to the form shewn.
The within described interlocking air tight cover F combined with the annular
grooved ring A is applicable to boxes or cases of any shape provided their form of
construction is such as to admit of their being fitted with a circular cover.
Having now particularly described and ascertained the nature of our said
invention, and in what manner the same is to be performed, we declare that what
we claim is:-
A metallic box or case to the top or neck of which is fixed a ring having an
annular groove and provided with two wedge shaped wings, the provision at the
bottom of the said annular groove of a ring of india rubber or other compressible
material, and the combination therewith of an interlocking cover having an
annular projection on its underside and provided with a crossbar substantially as
herein before described and illustrated by the accompanying drawings.
Dated this Eighteenth day of November 1899.
ALFRED LOVELL,
GEORGE FINCKEN.