Improvements in or relating to the Manufacture of Receptacles and Hollow Vessels of Wood.
Year: 1896

page_text: Date of Application, 24th Sept., 1896-Accepted, 28th Nov., 1896
COMPLETE SPECIFICATION.
Improvements in or relating to the Manufacture of Receptacles and
Hollow Vessels of Wood.
I, HUGO LUTHER, of Braunschweig, in the Empire of Germany Manufacturer,
do hereby declare the nature of this invention and in what manner the saine is
to be performed to be particularly described and ascertained in and by the following
statement:
The hereinafter described invention relates to a process for manufacture of hollow
vessels of bent wood of any desired shape and size.
The process is as follows;-
A mould is prepared corresponding to the inner or outer shape of the object to be
manufactured, and into or round this mould, boards of suitable dimensions are placed
close to each other and are led in or round the mould in one or several windings
of any desired direction and slope till the shape of the object to be produced is
obtained.
On the first layer follows a second layer of boards produced in similar manner,
which rise in the opposite or even in the same direction and are connected to the first
layer by glue or nails or the like and have their longitudinal joints with the same
slope arranged alternately to those of the first layer. On the second layer can be
placed if desired other similarly produced layers.
Figs. 1 and 2 show partly in elevation and partly in section a pipe made of three
layers of boards, in which the layers 2 and 3 slope in the opposite direction to
that of the layer 1, and the longitudinal joints of the layers 2 and 3 are arranged
in alternate order. The separate layers may however also be combined in other ways.
A layer of helically bent boards may also be combined with a layer of boards
bent to circular shape, or the first layer may be produced with boards placed in the
direction of the axes of the helix.
Figs. 3-7 show other hollow vessels produced according to the present invention.
Fig. 3 shows a plan of a rectangular vessel.
Figs. 4 & 5 are a vertical section and plan of a conical vessel.
Figs. 6. and 7 represent a plan and vertical section of a rectangular funnel.
In all such constructions the number of separate layers is of no importance.
Figs. 8 and 9 represent as another example a silo or storage receptacle made
according to the present invention.
Fig. 8 is a vertical section and
Fig. 9 a horizontal section thereof.
At first boards of suitable dimensions are bent in or round the receiver from the
side and placed round it one near another edgeways.
Behind this layer there is a second layer of bent boards with joints arranged
alternately with those of the first layer and connected to the latter by screws-or nails
with or without glue.
On this first layer are placed second, third fourth and the following layer, the
strengthening on the outside is effected in a similar manner by increasing the number
of layers all joints being arranged alternately till the height required and the thickness
of walls necessary to support the lateral pressure in the chamber are obtained. As
this pressure is smaller towards the top, the thickness of the walls can be reduced
towards the top this reduction being effected on the inner side so as to leave the
outside smooth or vice versa.

page_text: Preparing separate beards by a material impervious to water or fire (painting
impregnating etc.) may take place either before or after the erecting of the tower.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed I declare that what I
claim is ;-
1. A process for manufacture of hollow vessels the walls of which are made of
several layers of boards, consisting in the boards lying close to each other and
being wound in separate layers in helical lines of any desired slope and direction
or being bent into closed rings or placed in the direction of the height of the
vessel and the separate layers being connected to each other by suitable means
the consecutive order of different layers and their number being as desired,
substantially as described.
2. The employment of a process such as claimed in Claim 1, for the manufacture
of silos or storage receptacles comprising separate layers of bent boards connected
to each other and placed edgeways and near each other as well as one over the
other the joints being arranged in alternating order substantially as described.
Dated this 22nd day of September 1896.
BOULT. & WADE,
Agents for the Applicant..