Improvements in Metallic Lathing.
Year: 1889

page_text: COMPLETE SPECIFICATION.
Improvements in Metallic Lathing.
I, GEORGE HAYES, of No. 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 improvements relate to lathing of sheet-metal adapted for reception of plaster
by apertures punctured through and the edge-metal of the cuts or incissions turned
outward and not removed from the sheet but left projecting as tongues, hook or barbs
to become embedded within the plaster-thereby securing the same to the sheet.
And my invention consists of a sheet-metal lath in sheet or strip passing apertures
at intervals throughout, at the verge of each of which apertures is a tongue of the
metal turned outward in forming the opening and with a forward bend over the
opening which it then partly overhangs.
It also consists of a lath of sheet-metal apertured at intervals throughout, each
aperture having two tongues of the edge-metal bent outwards from the plane of the
sheet in forming the opening and again at a suitable point bent forward over the
opening to forn: hooks or barbs for retention of plaster.
It also consists of a sheet metal lath having apertures at intervals throughout, each
aperture having two tongues of the edgemetal turned outward and with a forward
bend over the aperture, one from each opposite side or end of the aperture-and two
tongues of the edge-metal turned outward and with a backward bend away from the
opening at the remaining opposite sides or ends.
It further consists of a lathing in sheet or strip provided with tongued apertures at
intervals throughout each tongue to each aperture integral with the sheet and certain
of the tongues formed with two bends-one wherein union with the sheet and the
other at a point intermediate of its length.
All as hereinafter more fully described reference being had to the accompanying
drawings-in which—
Figure 1-represents a piece of sheet-metal lath-showing the face prepared for
reception of plaster with its tongued apertures. At the upper left-hand corner the
aperture is shown with dotted lines across the field which indicate the direction of
primary cuts or incissions.
Figure 2-is a sectional view on line w - - x of Fig. 1.
Figure 3-is a sectional view on line y
11- 2 of Fig. 1.
Figure 4 is a perspective view of a small piece of lath with one tongued aperture
like those of Fig. 1.
Figure 5-is a perspective view of a small piece of lath with one tongued aperture
as a modification the side tongues omitted, and the bend to the inwardly projecting
tongues more angularly made.
Figure 6-is another modified form in perspective in this case two sides flanges
are shown at the verge of the opening-bent forward instead of backwards.
Figure 7-is another modification in perspective four tongues are shown, all pointed
and projecting over the opening.
Figure 8-is a face view of a small piece of lathing with one aperture with two
forwardly projecting tongues and two turned backwardly from the opening-dotted
lines within the field of the aperture show the cross cuts which seperate the metal.
Figure 9-shows a face view of another modification with two tongues projecting
over the opening and four tongues turned backwardly from the opening-dotted lines
show the cross cut.
Figure 10 is a plan view of another modification-four apertures shown each with
one tongue only-projecting over to partly cover the aperture.

page_text: Figure 11-is another modification-one tongue to the aperture which is here
shown approximating a triangle-it may be fully pointed at one end when desired.
Figure 12-shows another modification dotted lines show the cuts, the two side
tongues here project over the opening and two tongues at each end are turned
outwards and backwards from the openings.
On the drawings A, represents the lath B, indicates the apertures-(), the tongues
which raised above the plane of the sheet project partly over the aperture and
D, indicates the tongues turned or bent backwards from the aperture-E, in Figs. 2
and 3 indicate the line of plaster dotted.
I do not confine myself to any particular shape of aperture-I have shown several
shapes to illustrate the principle upon which they are made.
The apertures are formed by suitably shaped dies which cut through the metal and
turn out the portions where desired to produce the tongues-and also giving them the
desired bends.
The tongues C, are bent out from the plane of the sheet and then forwards to partly
cover the openings-the bends may be curved or angular as desired, and their free
ends may be depressed towards the opening if desired but I prefer them to stand
about as shown in Figure 1. 2 and 3.
The tongues D, are bent outward and with a bend backwards as shown sectionally
in Figs. 2.
The bends in the tongues servo to stiffen them and also bring them to the desired
position for securing plaster-which when applied completely surrounds thom so that
they become embedded therein the plaster also sets into the apertures and protruding
at the back of the lath forms into knobs or buttons.
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 sheet-metal lath having at intervals throughout-apertures-each formed
by cutting incissions through the sheet and forcing outwards the edge-metal of the
cuts beyond the plane of the sheet so that they stand as tongues projecting over and
partially cover the opening essentially as shown and described.
Second A sheet-metal lath formed for the reception of plaster by apertures arranged
at intervals throughout, each aperture having tongues of metal integral with the
sheet raised beyond the surface and projecting over the opening essentially as shown
and described.
Third-A sheet-metal lath provided with apertures at intervals throughout-each
aperture having a tongue of metal turned outwards in forming the opening-each
tongue formed with a bend where in union with the sheet and another bend inter-
mediate of its length carrying its free end forward over the opening essentially as
shown and described.
Fourth-A sheet-metal lath having at intervals throughout apertures-each aperture
having two tongues of the sheet-metal raised and projecting over the opening-their
free ends directed towards each other essentially as shown and described.
Fifth A sheet-metal lath having at intervals throughout-apertures-each aperture
having a tongue of the edge-metal raised and projecting over the opening and a tongue
of the edge-metal turned outward and with a bend backward away from the opening
essentially as shown and described.
Dated this 10th day of December 1884