Improvements in Metallic Lathing for Walls of Buildings.
Year: 1891

page_text: Date of Application, 3rd June, 1891
Complete Specification Left, 3rd Mar., 1892-Accepted, 9th Apr., 1892
PROVISIONAL SPECIFICATION.
Improvements in Metallic Lathing for Walls of Buildings.
I WILLIAM WILSON HORN of the firm of Horn and Son of 151 Strand in the
County of Middlesex Patent Agent do hereby declare the nature of this invention
(a communication to me from Robert Williams Gibson of 18, Wall Street, New
York United States of America Inventor) to be as follows:-
This invention relates to the manufacture of fire-proof lathing for buildings out
of sheet metal by cutting slitting and drawing or otherwise opening the same so as
to form a surface on which mortar will clinch on hardening and bending or
similarly treating the sheet metal at intervals so that it will have the requisite
stiffness.
The object of my invention is to provide a stiff metallic lathing of this character
which will serve also efficiently in lieu of the usual furring in that it may be
attached directly to a flat wall or solid timber work and will stand out so as to
raise the plastered surface therefrom and leave an air space the same as with the
common furring and lathing.
In making my improved lathing a sheet of metal preferably sheet iron is formed
with corrugations preferably parallel and of a square or angular cross section and
of a proper depth for furring. Between such corrugations the sheet metal is cut
or slit in parallel lines oblique to the corrugations and the sheet metal then
distorted so as to form between the said corrugations an expanded bar-like open-
work and to space the intervals at about the usual distance apart.
This open work may be left smooth or the bars made of angular or U-shaped
cross section or the open work may be distorted into a net work of any approved
description for clinching the mortar.
This lathing may be applied to a flat wall or solid timber work with the
corrugations projecting inward and nailed to the wall or timber work when the
comparatively flat though distorted open work will stand out stiffly from the wall
or timber work the flat inner sides of the corrugations and their depth serving in
lieu of the usual furring to keep the lathing rigid both longitudinally and
transversely. The mortar is then applied to the lathing filling up the
corrugations and being securely clinched by them and by the distorted open-
work so that when dry the plastering will be held securely and rigidly against
displacement.
Dated this 3rd day of June 1891
HORN & SON,
Applicant's Agents.
COMPLETE SPECIFICATION.
Improvements in Metallic Lathing for Walls of Buildings.
I WILLIAM WILSON HORN of the firm of Horn and Sou of 151 Strand in the
County of Middlesex Patent Agent do hereby declare the nature of 'this invention
a communication to me from Robert Williams Gibson of New York United States
of America Inventor 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 fire-proof lathing for buildings out-
of sheet metal by cutting, slitting, and drawing or otherwise opening the same, so
as to form a surface on which mortar will clinch on hardening, and bending or

page_text: Simary treating the sheet metal at intervals, so that it will have the requiSIT
stiffness.
The object of my invention is to provide a stiff' metallic lathing of this character
which will serve, also, efficiently in lieu of the usual furring, in that it may be
attached directly to a flat wall or solid timber-work, and will stand out, so as to
raise the plastered surface therefrom and leave an air-space the same as with the
common furring and lathing.
To this end the invention consists of the novel self-furring lathing and the
method of making the same, hereinafter described and as claimed.
Reference is to be had to the accompanying drawings, forming a part of this
Specification, in which―
Figure 1, illustrates a self-furring lathing made according to my improvement
applied to a flat wall.
Fig. 2, is a sectional view of the said wall and lathing on the line X, X,
Fig. 1.
Fig. 3, represents a slit and corrugated sheet-metal blank, from which the said
Iathing is made by drawing out.
Like letters of reference designate corresponding parts in the several figures.
In making my improved lathing a sheet of metal, preferably of sheet-iron, is
formed with corrugations B, preferably parallel and of a square or angular cross-
section and of a depth proper for furring, as shown. Between such corrugations B,
the sheet metal is cut or slit by preference in parallel lines oblique to the
corrugations B, as shown in Fig. 3, and the sheet metal then distorted, as by
drawing out on a line transverse to the corrugations B, so as to form between the
said corrugations an expanded bar-like open-work C, as shown in Figs. 1, and 2,
and to space the corrugations about as common furring. This open-work C, may
be left smooth or the bars made of angular or U shaped cross-section, as shown in
Figs. 1, and 2, or the open-work may be further distorted into a net-work of any
usual or approved description for clinching the mortar.
This lathing may be applied to a flat wall E, or solid timber-work with the
corrugations B, projecting inward, and, nail-holes D, being formed in the bottoms
of the corrugations, thereby securely nailed to the wall or timber-work, when the
comparatively flat though distorted open-work C, will stand out stiffly from the
wall or timber-work, the flat inner sides of the corrugations and their depth
serving in lieu of the usual furring to keep the lathing rigid both longitudinally
and transversely. The mortar is then applied to the lathing, filling up the
corrugations and being securely clinched by them and by the distorted open-work,
so that when dry the plastering will be held securely and rigidly against
displacement or distortion.
In some cases this lathing may be applied to joints or common furring with the
corrugations transverse thereto.
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 made of sheet metal formed at intervals with depressed corrugations,
the bottoms of which are in the same plane, the raised sheet metal between said
corrugations being slit or stretched into a mortar-clinching open-work, substantially
as described.
2. Lathing made of sheet metal formed at intervals with depressed corrugations,
the raised sheet metal between said corrugations being slit and stretched into a
mortar-clinching open-work, while the corrugations are straight, substantially as
described.
3. The combination, substantially as hereinbefore set forth, with a wall, of a
metallic furring consisting of sheet-metal joist-like channels having their bottoms
fastened without other and intervening joists or furring directly against said wall,
and a metallic lathing consisting of a mortar-clinching open-work of sheet metal

page_text: formed integrally with and bridging the wide spaces between the said sheet-metal
channel joists and standing out from the said wall, so that nearly all the applied
mortar will stand out from the wall, which is on a level with the bottoms of the
channel-joists, substantially as described.
4. The improvement in the art of making lathing of sheet metal, which consists
in corrugating the sheet metal at intervals, in slitting or slashing the sheet metal
between said corrugations, and in stretching the slashed portions into a mortar-
clinching open-work, while maintaining the corrugations straight and parallel,
substantially as hereinbefore set forth.
Dated this 3rd of March 1909
HORN & SON,
Applicant's Agents.