Year: 1886

page_text: .Date of Application, 12th June, 1886,
Complete Left, 24th Dec., 1886.
Complete Accepted, 25th Jan., 1887.
We WILLIAM CRAWFORD and CORNELIUS CRAWFORD 26 Carnarvon Street Glasgow
in the County of Lanark, Scotland, Tinsmiths do hereby declare the nature of this
invention to be as follows:
The object of our invention is to construct metallic boxes cans and other receptacles
so as to render them air-tight and to dispense with the use of solder in closing the lids ;
thereby permitting the boxes cans and other receptacles being used repeatedly which
not be done when the lids are soldered.
We construct boxes, cans or other receptacles which may be of any suitable shape,
but preferably round oval or tapered with a bevelled ring of metal, stamped in one
piece with a top edge soldered to the edge of the box, can or receptacle, this bevelled
ring extending either outside or down the inside of the box can, or other receptacle.
The lid or cover for use in connection with this bevelled ring may be constructed in
various ways. Where the bevelled ring is used in the inside of the can, box or other
receptacle the lid is made of a corresponding diameter, and has its top so formed that
it projects slightly over the outer edge of can, box, or other receptacle to permit of its
being lifted by tapping the edge with a hammer or any suitable tool; or instead of
projecting over the edge of the can it may be made to extend slightly down the outside
and can be removed in the same way as already stated. This last form of the lid is
also suitable where bevelled ring is formed on the outside of the can; the only difference
is that the part extending down is slightly deeper. When the lid is placed on the can
and brought under pressure or a series of blows, an air-tight joint is formed in the one
case by the outer surface of the lid bearing on the bevelled ring in the can; where the
ring is fitted outside of the can the joint is formed by part of that lid extending down
outside of the can. We also propose to run a bead or beading round the outer side of
the can in bevelled or half-round forms.
A
WM. CRAWFORD.
C. CRAWFORD.

page_text: COMPLETE SPECIFICATION.
Improvements in Metallic Boxes, Cans, and other Receptacles.
WILLIAM CRAWFORD and CORNELIUS CRAWFORD, 26 Carnarvon Street, Glasgow in
the County of Lanark, Scotland Tinsmiths do hereby declare the nature of this
invention and in what manner the same is to be perfornied, to be particularly described
and ascertained in and by the following statement:-
The object of our invention is to construct metallic boxes, cans and other receptacles,
so as to render them airtight, and to dispense with the use of solder in closing the
lids thereby permitting of the boxes, cans and other receptacles being used repeatedly,
which can not be done when the lids are soldered. We fit the boxes, cans, and other
receptacles, which may be of any suitable shape but preferably, round, oval or tapered
with a stamped ring of metal in one piece with a horizontal or bevilled edge which is
soldered to the top edge of the can, this stamped ring extending upwards or downwards,
on the outside, or down the inside of the can. The lid or cover for the can is made
dished or hollowed, either on its inner or outer side to suit the position of the stamped
ring of the can.
This dished part may be of a corresponding diameter to the ring or as we now prefer
to make it slightly less inclined, so that, when the lid is placed on the can, and brought
under pressure, an airtight joint is formed, in the one case by the lower edge of the
inner surface of the lid, "which is dished on its outer side," bearing on the stamped
ring in the can, and in the case where the ring is fixed outside of the can by the lower
edge of the lid, "which is dished on its inside" bearing on the outside of the ring.
The top edge of the lid dished on its outside, is made horizontal, and projects slightly
over the edge down the outside of the can and any of the forms of the lid may be
removed, by tapping on this projecting edge or part extending down the inside, with
a hammer or other suitable tool.
Four modifications of our improved cans are shown in the drawings annexed hereto,
the figures being vertical sections of the cans, with the lids placed on, so as to form
air tight joints.
In Figure 1, the can C, is of a cylindrical form, and a stamped ring R which is made
in one piece with a small bevelled or horizontal flange F which is placed and soldered
on can C.
The lid L which is used in this case, is dished on its onter side and when inserted
into the can with sufficient pressure, its lower edge bears against the stamped ring,
and by its wedging action, forms an air tight joint.
The top of the lid L is formed with a horizontal flange A which is preferably slightly
larger in diameter than the can C to facilitate the removal of the lid from the can, by
acting on the outer edge of this flange A with any tool. The outer edge of the flange
is curled over to strengthen it. A bead B is formed near the top of the can C, so that
when a number of the cans are packed together for carriage the projecting flanges A
of the lids, will not interfere with each other.
In figure 2 the can C is made of a tapered cylindrical form, and the ring R, is placed
on the outside, and soldered to the top edge and projects downwards with an outward

page_text: inclination. The small horizontal or bevelled flange F being dispensed with in this
case.
The lid L is dished on its inner side its lower edge being turned over to strengthen
it, and the air tight joint is formed, when the lid is forced on, by this lower edge
bearing on the outer side of the ring K. The lid is removed from the can by tapping
the lower edge with any tool. The taper form of the can prevents the lid of one can
interfering with another when packed together.
Figure 3 is a similar modification to that shown in figure 1, but the lower edge of the
ring R is formed with a narrow flange D on the inner side and the lid L is made
slightly deeper so that when pressed fully into the can its lower edge comes in contact
with the flange D. and a space is left between the flanges F and A and the lid can also
be removed by hammer or square edged tool.
In the modification shown in figure 4 the ring R with bevelled or horizontal flange is
fixed on the can C, the ring extending upwards instead of downwards as in the
previous modification. The lid in this case being dished like that used in figure 3 but
having its lower edge formed with a horizontal flange A which extends slightly over
the edge of the can to facilitate the removal of the lid. The can may either be formed
with a bead B as shown in figure 1, or tapered as shown in Figure 2.
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
Constructing metallic boxes, cans, and other receptacles with a ring to act in com-
bination with a dished or hollowed lid substantially as and for the purpose herein before
described.