Improvements in Metallic Lathing.
Year: 1890

page_text: COMPLETE SPECIFICATION.
Improvements in Metallic Lathing.
I, GEORGE HAYES, of 71 Eighth Avenue, in the City, County and State of New
York, United States of America, Civil and Mechanical Engineer, do hereby declare
the nature of my invention for "IMPROVEMENTS IN METALLIC LATHING," and in
what manner the same is to be performed, to be particularly described and ascertained
in and by the following statement :-
My invention consists of a lathing of sheet-metal-in sheet or strip-corrugated
throughout and having apertures formed at intervals therein by cutting incisions or
slits the edge-metal of which is turned outwardly when forming said apertures and
with a bend backwardly from each of said apertures and left standing (or projecting)
as tongues, hooks or barbs to grasp plaster when applied thereto-all as hereinafter
more fully described reference being had to the accompanying drawings, in which,
Figure 1-represents a face view of a piece of the lathing-corrugated and provided
with tongued apertures here shown of triangular shape.
Figure 2-is a crosswise section of the same on line -x of Fig. 1. The
apertures of Figs. 1 and 2 are shown as cut through the slope of the corrugation.
Figure 3, is a face view of a piece of lathing showing apertures cut through the
hollow of the corrugation being a modification.
Figure 4, is a section of the same on the line y- of Fig. 3.
Figure 5-is a cross section of a piece of lathing-being another modification,
the corrugations more angular-the apertures cut through the slopes and arranged
oppositely.
On the drawings A, indicates the piece of lathing of sheet-metal and of any desired
dimensions as a sheet or strip.
B, indicates the apertures and C, indicates the tongues, hooks or barbs formed of
the edge-metal of the cuts turned outward and with a backward bend from the opening
in the process of forming the aperture.
I do not confine myself to the shape of apertures shown nor to their arrangement
with regard to each other-nor to the forms of corrugations given as other forms
may be substituted, but it is essential that the arrangement of corrugations and
apertures be such that certain of the tongues turn over backward from the openings
and towards the rise of the corrugations so that plaster will become locked between
them.
In Figure 1. the tongued apertures are shown as arranged in diagonal lines across
the lath but in the rise of the corrugation and with each tongue turned over towards
the rise of the opposite corrugation so that it somewhat arches the hollow of the
corrugation (as shown to that face of the lath) and in this manner they alternate
lengthwise the lath-one aperture to one rise and the next to the other rise.
In Figure 3. they are represented in straight lines across the lath with the points of
one line of apertures turned one way and the points of the next line turned the
opposite way and so on alternating-the apertures all cut through the bottom of the
hollow and with tongues turned over backward towards the rise of the corrugation.
The apertures shown are triangular with one tongue turned outward and backward
from each opening the apertures may be oblong or any other convenient shape and
formed with several tongues of the metal turned outward as desired.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
First. A lath of corrugated sheet-metal having one face prepared to receive
plaster by a formation of apertures within the ridges or summits of the corrugations

page_text: (as showing to that face) each aperture having a tongue of the metal turned outward
in forming the aperture left standing as a hook or. barb to grasp plaster, essentially
as shown and described.
Second. A lath of corrugated sheet-metal having within the ridges or summits of
the corrugations to one face-rows of apertures-each aperture having a tongue of
the metal turned outward in forming the aperture left standing with a backward
bend from the aperture and pointing towards the rise of a corrugation, as a hook or
barb to grasp plaster, essentially as shown and described.
Third. A lath of corrugated sheet-metal having through each slope of each
corrugation, to one face, a row of apertures, each aperture having a tongue of the
metal, turned outward in forming the aperture, with a backward bend from the
aperture towards the rise of the opposite corrugation and left standing as a hook or
barb to grasp plaster, essentially as shown and described.
Fourth. A lath of corrugated sheet-metal, having through the hollow of each
corrugation, to one face, a row of apertures, each aperture having a tongue of the
metal, turned outward in forming the aperture-with a backward bend from the
opening towards the ridge of a corrugation and left standing as a hook or barb to
grasp plaster, essentially as shown and described.
Dated this 19th day of May 1890.
Witnesses,―
CLARENCE L. COLES.
ARTHUR HAYES.
Haseltine, Lake & Co.,
GEO. HAYES.
45, Southampton Buildings, London, Agents for the Applicant.