Improvements in or relating to the Covering of Metal Vessels for Transport or other purposes.
Year: 1897

page_text: Date of Application, 30th Oct., 1897-Accepted, 29th Oct., 1898
COMPLETE SPECIFICATION.
Improvements in or relating to the Covering of Metal Vessels for
Transport or other purposes.
We, ADOLF GEORG HOFFMANN, Engineer, and AUGUST SCHWARZ, Merchant,
both partners of the Firm of Deutsche Siphon Fabrik Hoffmann, Schwarz
& Co., of Mockernstrasse 118, Berlin, in the Empire of Germany, 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:—
Metal vessels are especially suitable for the transport of liquids, gases, or
powdered or solid materials, as their construction and strength and perfect closure
by means of soldering they answer most requirements. Such metal transport.
vessels however have great deficiencies as in order to be of sufficiently durability
they must have walls of considerable thickness and consequently are of consider-
able weight and further in consequence of the known qualities of the metal, tem-
perature influences are not effectively excluded from the packed materials, but
are even conducted thereto and thus these materials are liable to decay.
For avoiding these inconveniences metal transport vessels are here provided
with an exterior protecting and insulating covering by which means the thick-
ness of the metal wall can be considerably reduced, and further the metal is pro-
tected from excessive heat or cold.
Also by means of such a covering it is possible to give the vessel an elegant
exterior appearance.
The annexed drawing shows as an example the application of the covering in
question to a barrel shaped transport vessel.
The most suitable materials for the covering are wood, cellulose, leather,
linoleum, celluloid, papier maché felt and the like, which are used in the form
of staves, plates, bands or the like.
In the example of construction as represented there are used staves c, which
are arranged in the usual manner on the metal vessel a and can be connected
with the latter by means of hoops or bands d, and in order to protect the upper
and under edges of the same against injuries, the upper and under bands are a
little larger than the others so that they project over the covering and these pro-
jecting parts e aré then bent over and inwards in such a manner, that they cover
the edges of the covering. These bent bands are then connected with the metal
vessels by means of soldering, rivetting or the like and form thus not only pro-
tecting caps over the edges of the covering but also protecting surfaces for the
vessels during the transport etc. In many cases this form of the upper and
under bands will not be required; one can cut these bands level with the edges
of the covering and apply suitable connecting means and then connect with the
inner metal vessel.
Having now particularly described and ascertained the nature of this in-
vention and in what manner the same is to be performed we declare that what
we claim is:-
-
An improved vessel for transport or other purposes provided with an insulat-
ing and protecting covering staves, plates, bands or the like of wood, cellulose,

page_text: leather, linoleum, celluloid, papier maché felt or other suitable materials being
arranged on the metal vessel according to the form of the latter and connected
with the same by bands or hoops, the upper and under ones of which are bent
inwards over the edges of the covering for the purpose of protecting the latter
and are connected with the metal vessel by means of soldering riveting or the like.
Dated this 11th day of July 1898.
HERBERT HADDAN & Co.,
Agents to Applicants, 18, Buckingham Street, Strand.

page_text: Date of Application, 30th Oct., 1897-Accepted, 29th Oct., 1898
COMPLETE SPECIFICATION.
An Improved Process for Producing Seamless Metal Vessels.
We, ADOLF GEORG HOFFMANN, Engineer, and AUGUST SCHWARZ, Merchant,
both partners of the Firm of Deutsche, Siphon Fabrik Hoffmann, Schwarz
and Co., of Mockernstrasse, 118, Berlin, in the Empire of Germany, do hereby
declare the nature of this invention. and in what manner the same is to be per-
formed to be particularly described and ascertained in and by the following
statement:-
This invention relates to an improved process for producing seamless metal
vessels consisting together with their bottoms of one piece, and they can be of
any suitable form, for instance like a cask, drawn in on the under and upper
parts and swelling in the middle, or like a cam, drawn in at the under or upper
part, or like a jug, drawn in at the upper part and enlarged at the under part
or of any other bellied or other form, wherein material is partly expanded and
partly contracted so that weakening of the material due to excessive expansion
is avoided.
The difficulty in producing such metal vessels has hitherto consisted in giving
them throughout an equal or at least nearly equal thickness through their sides.
This difficulty is avoided in the present invention by using as a ground form
a cylindrical vessel, the diameter of which is equal to the mean diameter of the
finished product, and by then working this cylinder at the upper and lower ends
and in the middle in such a manner, that the desired form is produced.
When for instance a cask like vessel is to be made the middle and largest
diameter of which is 25 cm. and the upper and lower diameters of which are each
21 cm., there is made out a conveniently cut metal plate a cylindrical shaped body a
consisting together with a bottom plate of one piece the diameter of this cylinder
is made equal to the mean diameter of the cask when finished (that is 23 cm.).
In order to diminish the underpart of this cylinder in a conical manner, a mould
or pattern c Fig. 3 in the form of a cone is suitably placed in its interior and the
vessel is formed to correspond to the shape of this mould by means of a roller press d
operating from the outside of the cylinder. Then the middle or bellied part of
the cask is formed by pressing the sides of the cylinder against a suitable
mould placed on the outside by means of a roller press g operating from inside
the cylinder; then the upper part is pressed conically inwards in a like manner
to the under part by a roller i onto a divided mould h in the form of a cone.
Fig. 1 the material
a metal vessel is produced which has the form of a cask
of which, throughout its sides, has in no part been excessively expanded or con-
tracted as in consequence of the chosen diameter of the cylindrical ground form
the sides are drawn equally inwards and outwards respectively.
Thus
When for instance a can, Fig. 2 is to be produced a cylindrical body a is made,
the width of which corresponds with the mean diameter of the finished can ¹,
and the under part is enlarged in manner as herein before described and the
upper part is drawn in, so that in this case also the material has in no part been
assively expanded or contracted.

page_text: Any other forms may be produced in a similar manner, provided the correct
diameter, is given to the blank form for providing for an equal balance between
contraction and expansion of the material throughout the sides of the finished
product.
Having now particularly described and ascertained the nature of this in-
vention and in what manner the same is to be performed we declare that what
we claim is:-
1. An improved process for producing seamless drawn metal vessels of any
form out of one piece, whereby a cylinder with bottom is taken preferably as a
blank the open width of this cylinder having the mean diameter of the finished
piece, so that by drawing in the upper part of this cylinder and bellying out the
under part or inversely or by drawing in the upper part, bellying the middle
part and drawing in the under part, the desired form is produced by equal ex-
tension and contraction of the walls, for the purpose of straining the metal of
the cylinder everywhere in an equal manner.
That thia 20th day of Oatahan 1807
HERBERT HADDAN & Co.,
Agents to Applicants, 18, Buckingham Street, Strand, London.