Improvements in Metallic Lathing.
Year: 1892

page_text: Date of Application, 23rd Feb., 1892-Accepted, 26th Mar., 1892
COMPLETE SPECIFICATION.
Improvements in Metallic Lathing.
I, GEORGE HAYES, of 71 Eighth Avenue, in the City and State of New York,
United States of America, Civil and Mechanical Engineer, 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 :--
My improvements relate to lathing formed of sheet-metal having at intervals
throughout tongued apertures and my invention consists of a sheet-metal lathing
formed with corrugations throughout and in the hollows of the corrugations (as they
appear to its front or receiving face) tongued apertures in line lengthwise the
corrugations with the tongues turned over backward from the openings in a
direction lengthwise the hollow and towards the next opening in line.
It further consists of a corrugated sheet-metal lathing having tongued apertures.
of special shape in the hollows of the corrugations appearing to its receiving face
hereinafter more fully described, reference being had to the accompanying drawings
in which-
Figure 1, represents part of a sheet of the corrugated sheet-metal lathing, showing
its receiving face with tongued apertures.
Figure 2, is a cross section of the same on line w-r of Fig. 1.
Figure 3, is a face view of a sheet-metal lath showing a modification in respect to
the tongued apertures.
Figure 4, is a face view of sheet-metal lath showing another modification in
respect to tongued apertures.
Figures 5, and 6, are sectional views showing modifications in respect to the-
corrugations.
Figure 7, is a longitudinal section of corrugated lath like that of Figs. 1 and 2,
showing manner of turning over the tongues.
On the drawings A, indicates the corrugated sheet-metal lathing. I do not
confine myself to any particular form of corrugation but corrugate the sheet after-
any of the known forms in present use when suitable.
By corrugating the sheet of lathing I obtain stiffness rendering the lathing more-
secure against pressure when upon studding or other supports.
B, indicates the tongued apertures and C, the tongues-the apertures are formed
by puncturing through the sheet and turning outwardly to one face the edge-metal
with a bend backward from the opening-leaving it standing as a tongue, hook or
barb to grasp plaster when applied thereto.
In this lathing the bend of the tongues of metal is in a direction lengthwise of the
corrugations-the shape of the openings and tongues may vary-but it is essential
that each aperture is provided with a tongue bent over and pointing towards the
next aperture in line, when two tongues are formed to each aperture as shown in
Figs. 1, 2 and 7, a tongue of one aperture always points towards a tongue of the
next aperture in line-tongues so arranged admit plaster readily beneath-the
plaster becoming an inverted arch and dovetailing itself between two tongues,
whereby it is more firmly secured than in plain sheet metal lathing-and is not so.
liable to cut itself away.
The openings of Figs. 1, 2 and 7-are formed from cuts made as shown by dotted
lines at a, Fig. 1-upper left hand corner, this is the preferable form of opening-it
admits of the rounding of the longitudinal edges of the opening by slightly turning
outward the edges thereby obviating the effect of sharp or cutting edges as the
blaster entering the openings keys at the back-and it is desirable that it should
remain firmly fixed-by means of such apertures and the tongues arched towards.

page_text: each other as shown in Fig. 7-plaster adheres to the lathing with enduring
permanency.
The openings of Fig. 3, are formed by cutting as by dotted line a', with side
lines of opening-a single tongued opening may be made similarly from a square
opening openings like Fig. 4. are cut as shown and the whole metal turned
outward to form one tongue.
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 lathing of corrugated sheet-metal having in the hollows of the corru-
gations to one face-tongued apertures arranged in lines lengthwise of the
corrugations a tongue of each aperture turned outward with a bend backward
from the opening and towards the next opening in line as set forth.
Second. A lathing of corrugated sheet-metal having in the hollows of the
corrugations to one face-tongued apertures in line lengthwise of the corrugations,
the longitudinal sides of each opening rounded and at each end of each opening a
tongue of metal standing outward with a bend backward from the opening and
towards the next in line as set forth.
In presence of
JAMES R. MCAFEE.
ARTHUR HAYES.
Cortiary O
GEO. HAYES.