Improvements relating to Wire Netting for use in the Manufacture, of Fire-proof Ceilings, Walls, and the like, and for other, Purposes.
Year: 1889

page_text: Date of Application, 23rd Sept., 1889
Complete Specification Left, 23rd June, 1890--Accepted, 26th July, 1890
PROVISIONAL SPECIFICATION.
Improvements relating to Wire Netting for use in the Manufacture,
of Fire-proof Ceilings, Walls, and the like, and for other,
Purposes.
I, CARL RABITZ, of 7 Scharnhorststrasse, Berlin N.W. in the Empire, of
Germany, Builder do hereby declare the nature of this invention to be as
follows:-
Trials have shown that a permanently fire-proof lining of mortar can be obtained
only through the inedium of a double wire-netting. There are however practical
difficulties to be overcome in properly stretching the two wire nettings, that is to say,
in such a manner that the inner notting will be throughout exactly at the same
distance from the article to be protected, and that the outer netting will be through-
out precisely at the same distance from the inner netting. Moreover, the work will
be comparatively expensive by reason of the necessity for stretching both nettings
separately at distances which must be accurately measured.
The aforesaid inconveniences are obviated by the present invention which relates
to a double wire-netting for use in the manufacture of fire-proof ceilings, walls, and
the like, and for other purposes. Each of the two nettings employed is held by con-
necting wires at the distance which is best adapted for the fire-proof lining. The
two wire-nettings are so connected with each other that one can be laid together with
the connecting-wires upon the other so that the double netting can be rolled up in a
similar manner as a single netting, and can be stored and transported in the most
convenient, manner.
I will proceed to describe two arrangements of the double wire-netting, in one of
which the two nettings can be laid together by simply causing them to approach cach
other in a direct line, whilst in the second arrangement they can be laid together in
the same plane only by laterally displacing the two relatively to each other at the
same time.
In the first-mentioned arrangement one of the nettings has small meshes whilst
the other has large meshes. The connecting wires are conducted behind the wire-
work having small meshes, and are passed through the same at points opposite, every
second, third or other wire of the netting having large meshes, and then around the
respective wire of this netting. Two neighbouring connecting wires are transposed
relatively to each by the distance of one mesh or one field of the netting having
large meshes.
When the connecting wires are arranged in this manner the two nettings can be
displaced in a direct line in order to lay them upon each other. This having been
effected the free loops of the connecting wires can be turned round whereupon the
double wire-netting may now be rolled up like a single wire-netting.
Ir the second arrangement the connecting wires are so interwoven with the two
nettings that the latter cannot be moved towards each other along the parts of the
connecting wires between the two nettings. "The said connecting-wires pass in
either netting above and below the same so that the two nettings are held in a definite
manner at a distance from each other. This is not the case in the above described
first arrangement as one netting can be freely shifted towards the other in the loops
formed by the connecting-wires, as long as the intermediate space has not been
filled up with mortar.
In order to lay one netting upon the other in the second arrangement, the two must
be laterally displaced relatively to each other a distance equal to the distance between
them, in which case a Turning movement takes place between nettings and the

page_text: connecting-wires, so that the latter will be moved round with the former and the double
netting can now be rolled up like a single netting. The last-mentioned mode of laying
the two nettings together by the lateral displacement of the same relatively to each
other can also be used in the first-described arrangement. It will be readily under-
stood that the connecting-wires can be interwoven with the two wire-nettings in
various manners, and yet enable the two nettings to be laid together in one or the other
of the two manners described. In special cases the wire netting having small meshes
may be replaced by one having large meshes. Furthermore, for the continuous
connecting wires can be substituted single clamps or the like hinged or otherwise
connected with the two nettings. At the places where the improved wire netting is to be
used it is unrolled and according to the node in which the two nettings are connected,
either one netting is lifted from the other or one netting is drawn to the left and the
other to the right hand side, whereby the connecting-wires are caused to stand upwards.
In this manner the two nettings are moved back so as to pass to the original distance
from each other.
When the improved double wire-netting is employed for producing fire-proof
ceilings, walls or the like the outer netting can be laterally displaced relatively to the
inner netting whereby the connecting wires are caused to pass to an inclined position
whilst the nettings approach each other, so that, when a layer of mortar is of varying
thickness, the wire-netting serving as a support for the mortar can in every case be
placed in the most suitable position.
Dated this 14th day of September 1889.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements relating to Wire Netting for use in the Manufacture
of Fire-proof Ceilings, Walls, and the like, and for other
Purposes.
1, CARL RABITZ, of 7 Scharnhorststrasse, Berlin, N.W. in the Empire of
Germany Builder 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 :-
Trials have shown that a permanently fire-proof lining of mortar can be obtained
only through the medium of a double wire netting. There are however practical
difficulties to be overcome in properly stretching the two wire nettings that is to say
in such a manner that the inner netting will be throughout exactly at the same
distance from the article to be protected, and that the outer netting will be
throughout precisely at the same distance from the inner netting moreover, the work
will be comparatively expensive by reason of the necessity for stretching both nettings
separately at distances which must be accurately measured.
The aforesaid inconveniences are obviated by the present invention which relates to
a double wire-netting for use in the manufacture of fire-proof walls, and the like, and
for other purposes. Each of the two nettings employed is held by connecting wires at
the distance which is best adapted for the fire-proof lining. The two wire-nettings are
so connected with each other that one can be laid together with the connecting-wires
upon the other so that the double netting can be rolled up in a similar manner
as a single netting, and can be stored and transported in the most convenient
manner.
The accompanying drawing indicates two arrangements of the double wire netting
in one of which the two nettings can be laid together by simply cansing them to
approach each other in a direct line whilst in the second arrangement they can be laid
together in the same plane only by laterally displacing the two relatively to each other
at the same time.

page_text: Figure 1 shows an upper view of the first arrangement in which the nettings have
small meshes.
Figure 2 is a section in the direction of the warp.
Figure 3 a side view of the netting having large meshes.
Figures
arrangements.
to represent different views of the second of the above mentioned
The mode of weaving the connecting wires A is shown in Figure 2. The connect-
ing wires are conducted behind the netting B having small meshes, and are passed
through the same at points opposite every second, third, or other wire of the netting C
having large meshes, and then around the rospective wire of this netting C. Two
neighbouring connecting wires are displaced relatively to each other through the
distance of one mesh or one field of the notting Chaving large meshes. In the case
represented the wire A is conducted around the wires c¹ c³ the next connecting-
wire A' around the wires cce of the netting having large meshes, then the following
again around c¹³c and so on.
C
When the connecting wires are arranged in this manner the two nettings Band C
can be displaced in a direct line in order to lay them upon each other. This having
been effected the free loops of the connecting wires can be turned round whereupon
the double wire-netting may now be rolled up like a single wire-netting.
In the second arrangement illustrated in Figures 1 to 6 the connecting wires A are
so interwoven with the two nettings B and C that the latter cannot be moved towards
each other along the parts of the connecting wires between the two nettings. The
said connecting-wires, as shown in Figure 5, pass in either netting above and below
the same so that the two nettings B and C are held in a definite manner at a distance
from each other. This is not the case in the above described first arrangement as one
netting can be freely shifted towards the other in the loops formed by the connecting-
wires, as long as the intermediate space has not been filled up with mortar.
In order to lay one netting upon the other in the second arrangement, the two must
be laterally displaced relatively to each other a distance equal to the distance between
then, in which case a turning movement takes place between.nettings and the connecting-
wires, so that the latter will be moved round with the former and the double notting
can now be rolled up like a single neiting. The last mentioned mode of laying thi
two nettings together by the lateral displacement of the same relatively to each other
can also be used in the first described arrangement. It will be readily understood
that the connecting-wires can be interwovon with the two wire nettings B and Cin
various manners, and yet enable the two nettings to be laid together in one or the
other of the two manners described. In special cases the wire netting having sinall
meshes may be replaced by one having large meshes. Furthermore for the continuous
connecting wires A can be substituted single clamps or the like hinged or otherwise
connected with the two nettings B and C. At the places where the improved wire
netting is to be used it is unrolled and according to the mode in which the two
nettings connected, either one netting is lifted from the other, or one netting is drawn
to the loft and the other to the right hand side, whereby the connecting-wires are
caused to stand upwards. In this manner the two nettings are moved back so as to
pass to the original distance from each other.
When the improved double wire-netting is employed for producing fire-proof
ceilings, walls or the like the outer netting can be laterally displaced relatively to the
inner netting whereby the connecting wires are caused to pass to an inclined position
whilst the nettings approach each other, so that, when a layer of mortar is of varying
thickness, the wire-netting serving as a support for the mortar, can in every case be
placed in the most suitable position.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
A double wire netting in which the two parts (B and C) are connected with each

page_text: other at a suitable, distance apart by connecting-wires (A) in such a manner that the
two wire-nettings can be placed upon one another either by direct approach
(Figures 1 to 3) or by mutual lateral displacement (Figures 4 to 6) together with the
connecting wires, and the distance of the two wire nettings can be changed by lateral
displacement of the one relatively to the other, with the connecting-wires placed in an a
oblique position.
1000
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, Agents for the Applicant.