Improved Process for Making Thin Partition Walls of Plaster or Cement Mortar.
Year: 1893

page_text: ale of Application, 18th Sept., 1893-Accepted, 21st Oct., 1893
COMPLETE SPECIFICATION.
Improved Process for Making Thin Partition Walls of Plaster or
Cement Mortar.
I, THEODOR LEHMANN, Architect of Halle on the Saale in the Kingdom of
Saxony German Empire, do hereby declare the nature of my invention and in
what manner the same is performed to be particularly described and ascertained
in and by the following statement :-
The present invention consists of a process for making so called rabbet walls,
without however employing wood or metal lattice work within the same as
heretofore.
The walls are made of plaster or cement mortar, in the manner herein after
more particularly described.
And in order to make this Specification more easily intelligible, reference is had
to the accompanying drawings in which similar letters denote similar parts through
out the several views:
Fig. 1 is a side elevation of a partition wall having a doorway therein,.
Fig. 2 is a plan of Fig. 1, and
Fig. 3 a section through the wall taken along the centre of the doorway.
In the two opposite walls of the building in which the wall is to be erected
vertical grooves are ent, the frame of the doorway is then supported in
the position which it is after to occupy in the wall. A boarding a is
then temporarily fixed up so that one end of the same lies in the groove against
the side B of the same. The side A of the boarding is now covered with floor
plaster or cement mortar to the thickness which it is required to give to the wall,
and the surface of this coating is dressed or smoothed off. After this coating has
thoroughly dried at the side A, i.e. when the wall is sufficiently stiff, the boarding a
at the side B may be removed and this side also dressed. That part of the groove b
which was occupied by the boarding is now filled in and the wall is finished. In
drying the plaster will expand in all directions, so that the wall will remain fast in
position.
By means of the above described process it is possible to erect unsupported
walls up to about 13 feet in height, of sufficient stability and without overloading
the joists to any dangerous extent. Furthermore these walls are fireproof, which
is not the case with those walls having, internal lattice or other wood work.
The walls made according to my present invention are only intended as partition
walls and are generally made about 1-2 inches in thickness.
The mortar preferably consists of about one part of floor cement or cement
with an addition of stucco-plaster and one part by weight of sand or ashes.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is performed I declare that what I
claim is :-
A process for making thin unsupported partition walls, without employing wood
or metal internal lattice or other work, consisting in first making suitable grooves
in the walls to be connected, then putting up a temporary boarding, covering one
side of the same with a coating of floor plaster or cement mortar, dressing the
same and after the mass has sufficiently hardened, removing the boarding and
TD 037

page_text: finishing the opposite side of the wall thus erected in the manner and for the
purpose substantially as described.
Dated this 18th day of September 1893.
W. P. THOMPSON & BOULT,
Agents for the Applicant.