An Improvement in Metal Lathing.
Year: 1894

page_text: Date of Application, 3rd Apr., 1894
Complete Specification Left, 23rd Jan., 1895-Accepte1, 9th Mar., 1805
PROVISIONAL SPECIFICATION.
An Improvement in Metal Lathing.
SAMUEL TAYLOR HARVEY Surveyor 61 Strathblaine Road New Wandsworth,
S.W. and JAMES BARTLETT Architect 12 Aspley Road Wandsworth, S.W. do
hereby declare the nature of this invention to be as follows:-
The sheets which may be of iron, steel, tin, or other incombustible metals or
materials with a plain or roughened face is perforated at intervals on one side with
special dovetail shaped openings, the metal displaced on the one side forming a
special shaped key to hold up the plastering & at the same time allowing the
minimum thickness of plastering materials to be used, & while offering a flat
punctured surface to the plasterers tools thus saves much time in working, over the
corrugated methods now in use. The openings are of two forms placed alternately
on the width & length or diagonally of the sheets & are sunk respectively in
size 1" x 1" & "x" but may be of any width length or shape & the metal
displaced by the perforation be used to form or assist in forming the special key.
The sheets may be manufactured in any width or leugth to suit the requirements of
the building trade & where required for "dubbing out &c." may be used with the
rough face outward, or with larger perforations to allow of a coarser material being
used in the plastering.
Dated this 3rd day of April 1894.
SAMUEL TAYLOR HARVEY.
JAMES BARTLETT.
An improvement in Metal Lathing.
We, SAMUEL TAYLOR HARVEY, Surveyor, late of 61 Strathblane Road,
New Wandsworth, S.W., but now of 24 North Side, Wandsworth Common, S.W.
and JAMES BARTLETT, Architect, 12 Aspley Road, Wandsworth, S. W., 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 :-
According to our invention metal lathing is made of sheet iron. steel, tin or other
suitable metal, having either a plain or roughened face wherein suitable perforations
or openings of any convenient shapes and sizes are made on one side only. The
edges of the metal which is displaced in making such perforations or openings
form a series of keys that serve both to hold up the plastering more securely at the
same time that they allow the minimum thickness of plaster to be used. Another
advantage of such improved metal lathing is that it offers a flat punctured surface
to the plasterers' tools and thus effects a considerable economy both in time and
labour as compared with the corrugated metal lathing hitherto in use.
The perforations or openings which are preferably of different forms and sizes as,
for instance, dovetail and triangular are arranged alternately and either diagonally
or otherwise. A good average size for such perforations or apertures is, say,
n

page_text: 1" x 1" and "x", but where the lathing is required for dubbing out or other
similar work larger perforations may be made so as to allow of coarser material
being used in the plastering while the rough face of the lathing may be turned
outwards.
A further advantage of our invention is that the lathing can be made of thinner
and lighter metal thus effecting an economy in the cost of manufacture.
Figures 1 and 2 of the accompanying drawings show plan views of the front an
back surfaces of a piece of our improved metal lathing and Figure 3 is a section
taken on the line A. A. Figure 1, shewing the projecting edges of the displaced
metal which projecting edges form a series of keys as herein before mentioned.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what
we claim is;
As a new and improved article of manufacture metal lathing made of sheet iron,
steel, tin, or other suitable metal having either a plain or roughened face wherein
suitable perforations or openings of different forms and sizes are made on one side
only, and are arranged alternately, and either diagonally or otherwise so as to
form a series of keys to hold up the plaster and otherwise, all substantially as
herein before specified.
Dated this 23rd day of January 1895.
SAMUEL TAYLOR HARVEY.
JAMES BARTLETT.
Elt & Co.,
Patent Agents,
43, Southampton Buildings, Holborn, London, Agents for Applicants.