The Manufacture of an Improved Lathing for Fire-proof Walls, Ceilings, and the like.
Year: 1898

page_text: Date of Application, 13th May, 1898
Complete Specification Left, 13th Feb., 1899-Accepted, 18th Mar., 1899
PROVISIONAL SPECIFICATION.
The Manufacture of an Improved Lathing for Fire-proof Walls,
Ceilings, and the like.
I, CHARLES PETRI, of 84, Eden Street, Kingston-on-Thames, in the County of
Surrey, Manufacturer, do hereby declare the nature of this invention (a com-
munication to me by Paul Strauss, of Cottbus, in the Empire of Germany, Manu-
facturer) to be as follows:-
-
This invention relates to the manufacture of an improved lathing for fire-proof
walls, ceilings and the like.
According to the invention I provide a lathing made of burnt clay provided with
a wire insertion; the lathing is formed of clay bars or strips which are preferably
lozenge-shaped in cross section and cross one another like trellis-work so as to
leave spaces which serve to receive and retain the mortar or plaster.
The manufacture of the improved lathing is effected as follows, that is to say,
two pressure rollers, each of which has cut upon its periphery the form of the
lathing, are slowly rotated and press clay which is fed between them upon crossed
wires which are simultaneously fed between the said rollers. The moulded clay
mass which passes out from the rollers is drawn slowly over a heated body for dry-
ing purposes and then through a furnace having two horizontal slits opposite one
another, whereby the said clay mass is burnt to a brick hardness during its slow
passage therethrough and can then be rolled up. Any prejudicial effects which
might be produced by the unequal expansions of the clay and of the wire which
take place during the baking operation are compensated for by slits or notches
in the clay which are formed by projections upon the rollers so that the wire can
expand without tearing or cracking the clay bars surrounding it. At the same time
the said notches enable the lathing to be easily bent and rolled up.
COMPLETE SPECIFICATION.
The Manufacture of an Improved Lathing for Fire-proof Walls,
Ceilings, and the like.
I, CHARLES PETRI, of 84, Eden Street, Kingston-on-Thames, in the County of
Surrey, Manufacturer, do hereby declare the nature of this invention (a com-
munication to me by Paul Strauss, of Cottbus, in the Empire of Germany, Manu-
[Price 8d.1
The Manufacture of an Improved Lathing for Fire-proof Walls,
Ceilings, and the like.
I, CHARLES PETRI, of 84, Eden Street, Kingston-on-Thames, in the County of
Surrey, Manufacturer, do hereby declare the nature of this invention (a com-
munication to me by Paul Strauss, of Cottbus, in the Empire of Germany, Manu-
[Price 8d.1

page_text: facturer,) 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 the manufacture of an improved lathing for fire-proof
walls, ceilings and the like.
According to the invention I provide a lathing made of burnt clay provided with
a wire insertion; the lathing is formed of clay bars or strips which are preferably
lozenge-shaped in cross section and cross one another like trellis-work so as to
leave spaces which serve to receive and retain the mortar or plaster.
In the accompanying drawing:-
Figure 1 is an elevation of a portion of lathing made according to the invention.
Figure 2 is a section on the line 2-2 Figure 1.
a, a are the bars or strips of burnt clay, the said bars being somewhat lozenge-
shaped in cross section and crossing one another so as to leave spaces b, b serving
to receive and retain the mortar or plaster. c, c are the crossed wires forming the
insertion for holding the bars together.
The manufacture of the improved lathing is effected as follows, that is to say,
two pressure rollers, each of which has cut upon its periphery the form of the
lathing, are slowly rotated and press clay, which is fed between them upon crossed
wires simultaneously fed between the said rollers. The moulded clay mass which
passes out from the rollers is drawn slowly over a heated body for drying purposes and
then through a furnace having two horizontal slits opposite one another, whereby
the said clay mass is burnt to a brick hardness during its slow passage therethrough
and can then be rolled up. Any prejudicial effects which might be produced by
the unequal expansions of the clay and of the wire which take place during the
baking operation are compensated for by slits d, d or notches made in the clay
by projections upon the rollers so that the wire can expand without tearing or
cracking the clay bars a, a surrounding it. At the same time the said notches
enable the lathing to be easily bent and rolled up.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what I
claim is:
1. Lathing for fire-proof walls, ceilings and the like consisting of notched or
divided bars or strips of burnt clay of suitable shape in cross section and provided
with a wire insertion, substantially as herein before described.
2. The manufacture and use of the improved lathing for fire-proof walls, ceilings
and the like herein before described and illustrated in the accompanying drawing.
Dated the 13th day of Fahmom 1000
G F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.