Improvements in or connected with Sheet, Metal, Boxes.
Year: 1892

page_text: Date of Application, 8th Dec., 1892-Accepted, 28th Jan., 1893
COMPLETE SPECIFICATION.
..Improvements in or connected with Sheet, Metal, Boxes.
A communication by CORNELIS WOUD and JACOB'SCHAAP, both of Krommenie,
in the Kingdom of the Netherlands, Manufacturers.
I, WILLIAM PHILLIPS THOMPSON, F.C.S., M.I.M.E., of the Agency for
Foreign Patent Solicitors, 6 Lord Street, Liverpool and 6, Bank Street, Manchester,
both in the County of Lancaster and 323 High Holborn, in the County of
Middlesex, Civil Engineer, do hereby declare the nature of this invention 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 a band fastening for sheet metallic boxes in which
only one soldered seam is necessary for hermetically closing the box, instead of two
as in the present band fastenings, and which may be very easily loosened for the
purpose of emptying the box.
By this invention greater security against subsequent leakage of the box is
afforded than by the ordinary band fastening, it is also simpler and cheaper, may
be made with less solder, and is suitable for round, square, oval or any other shaped
sheet metallic boxes.
This improved band.fastening is shown in Figures 1 to 5 of the accompanying
drawings-
Figure 1 shows the sheet of metal cut out for making the box with the improved
band fastener.
Figures 2, 3, 4, and 44 show a vertical section of a cylindrical box together with
its lid in the various stages of the construction of the fastening; whilst
Figure 5 shows a vertical section of a closed box.
In this case the cylindrical form of box is explained as being the simplest, but
it must be understood that the invention is equally applicable to boxes of other
shaped sections.
The four cornered sheet of metal 1, 2, 3, 4, A has one of its side edges a
projecting strip 3, 5, 6, 7, B, dependent on the height the box is to be, which
strip serves for soldering the vertical connecting seam of the cylinder. The part
of the sheet above the line 7-8 is used in forming the fastening, and a tongue a is
arranged on this part, the object of which will be hereinafter explained.
The sheet of metal is first bent up on the line 7-8 in such a way that the
part 8, 7, 10 and 9 C, rests flat on A, whilst the part 1, 9, 10 and 4, D, stands
vertically to C or A; Figure 2 shows this when the sheet of metal has been bent
into a cylinder. Then the part D is bent round so that it lies flat on C, and then
the sheet A is rolled into a cylinder, Figure 3.
As the strip D is higher than C, it projects beyond the band of the box, as may
be seen from Figure 3.
The lid E is shown in Figure 44 and fits exactly between the bent up strips C
and D lying flat one upon the other. In order to easily insert the lid E the
projecting band of D must be bent outwards. The tongue a of the strip D projects,
as shown in dotted lines in Figures 3 and 4, along its whole length over the
vertical connecting seam d of the strip.
The strips D and C lie firmly and flat one upon the other, so that the point F
where the strip bends is quite clearly defined.
The bottom of the box may be inserted in any suitable manner.
In order to close the box, the lid is put on, and pressed in between C and D until
its upper surface lies level with or a little below the upper surface of D. Although
the strips C and D lie firmly on each other, they give sufficiently to allow of the
edge of the lid being pressed between them.

page_text: The box is then soldered up, both between the upper side of D and that of the
lid, as well as under the tongue a, at the vertical connecting seam d of the strips C
and D.
Figure 5 shows on the left side on a larger scale the box soldered at b. The
soldering at b seals the box up absolutely hermetically.
For loosening the fastening, a key is placed on the tongue a and by turning the
same the strip D is torn off all round the box.
As the bend at F, Figure 5, is a very sharp one, the strip D is separated quite
easily from the strip C and the solder. The lid may then be raised.
Figure 5 shows on the right side the box after the strip D has been removed.
Having now particularly described and ascertained the nature of the said inven-
tion, and in what manner the same is to be performed, as communicated to me by
my foreign correspondent, I declare that what I claim is :-
The improved fastening for sheet metallic boxes consisting of the specially
shaped upper edge of the box as shown and described and formed with the box
out of one sheet of metal, with a projecting tongue a in combination with a smooth
edged lid pressed into the annular channel formed by the specially shaped edge, and
soldered to its outward projecting face so that for opening the box the outermost
band of the edge need only be seized at the tongue a and be torn off the edge by
being rolled up, all substantially as herein before described and shown.
Dated this 7th day of December 1892.
WM. P. THOMPSON & Co.,
Agents for Applicant.