Improvements in the Construction of Hollow Concrete Floors, Walls and the like.
Year: 1899

page_text: Date of Application, 10th Feb., 1899-Accepted, 18th Mar., 1899
COMPLETE SPECIFICATION.
Improvements in the Construction of Hollow Concrete Floors, Walls
and the like.
I, JOHANN CHRISTOPH AUGUST BREMER, Architect, of Landwehrstrasse, 2, Halle
on the Saal, 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..
This invention relates to an improved construction of hollow concrete floor, walls
and the like, the distinguishing feature of the construction being that pipes are
employed for forming the hollow spaces, these pipes being embedded in cement,
gypsum, or other good binding material, the formation of the hollow spaces being
thus greatly simplified.
In the accompanying drawing:-
Fig. 1 is a cross section of a piece of work produced by the process.
Fig 2 a section of the same in the direction of the hollow spaces,
Figs. 3 and 4 details of the pipes serving as supporting linings,
Fig. 5 an end view of the blocks produced by the process,
Fig 6 a partial plan view of Fig. 5
Figs. 7 and 8 illustrate the application of the process to the production of hollow
walls,
Figs. 9 and 10 a portion of a piece of work in cross-section and plan of the
hollow spaces in the same connected with one another.
The application of the process in the production of hollow concrete work is as
follows:
After the supports have been provided with a suitable covering S, so as to
furnish a secure bed for the laver of concrete, the pipes R which may be made
of any suitable material, (their cross-section being regulated by the necessary
strength of the work), are laid in at suitable distances apart, and the ends, as
well as one or more of the intermediate parts. covered with concrete a, so that
any displacement of the pipes R. on the soft material being poured in, or anv
running of the concrete into the interior of the pipes R is prevented, whereupon,
the cement, gypsum, or other good binding material M which serves for pro-
ducing the walls is poured in (see Figs. 1 and 2)
By means of this process, hollow blocks A Figs. 5 and 6 for the building of
walls, and other constructional purposes, can also be produced, the pipes being laid
for this purpose in suitable moulds and the moulds filled with concrete.
If it be desired to produce hollow walls by means of this process, the nipes are
first fixed at the required distances apart, and in a suitable position in the direc-
tion of the wall. then embedded with concrete, and thereafter scraped smooth
(see Figs. 7 and 8)
The pipes R employed, may be made of a single piece or of several pieces, which
can be telescoped see Figs 3 and 4.
The work produced by this process is very light, and sound-proof, and requires
considerably less material than any other. It can be made further sound-proof

page_text: in the following manner: the several pipes R, being embedded, are connected by
means of smaller pipes r, so that all the hollow spaces, or certain groups of the same
are in communication, see Figs 9 and 10 thus facilitating the ventilation, or
heating of the hollow spaces, which is of great importance in view of the rapid
drying of the work, as well as for keeping it constantly in a dry condition.
As a matter of course, the communication of the hollow spaces with the outside
air or with the heating contrivance, can be effected in various ways
In order that vermin may not be harboured in the hollow spaces, it is desirable
to impregnate the pipes Rr with suitable protecting material, before using them.
Having now particularly described and ascertamed the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is:-
1 The improved construction of hollow concrete work, the distinguishing
feature of which is that pipes R, made of suitable matenal, are employed for the
formation of the hollow spaces, such pipes, after the laying in or setting thereof,
being covered with concrete, or similar material, and remaining in the work.
2 The improved construction of hollow concrete work, in such a way that, after
the supports have been furnished with a suitable covering S, the pipes R are
laid in at the requisite distances apart, then embedded with concrete or the like;
the cement being thereupon' poured in
3 The improved construction of hollow concrete blocks consisting in laying the
pipes in suitable moulds and filling the moulds with cement or the like.
4. The improved construction of hollow concrete work consisting in laying the
pipes R firmly in a suitable position in the direction of the work, and thereupon
embedding them on both sides with concrete or the like, and then concreting the
whole over.
5. In the improved construction of hollow concrete work, connecting the laid-in
pipes serving for the formation of the hollow spaces, by pipes r before the process
of pouring in the soft material, so that all hollow spaces, or a part of the same,
are in communication, and the ventilation or heating of the work is rendered
possible
Dated this 10th day of February 1899
WHEATLEY & MACKENZIE,
40, Chancery Lane, London, W.C., Agents.