Improvements in Sheet Metal Lathing and in Machinery for Making the same.
Year: 1892

page_text: Date of Application, 11th June, 1892
Complete Specification Left, 9th Mar., 1393-Accepted, 6th May, 1893.
PROVISIONAL SPECIFICATION.
Improvements in Sheet Metal Lathing and in Machinery for Making
the same.
1, WILLIAM ECKSTEIN, of 187 to 193 Union Street, Borough, in the County of
Surrey, Engineer, do hereby declare the nature of this invention to be as
follows:-
Thin sheets of iron variously perforated have been employed as a foundation to
receive wall plaster.
I prepare sheets for this purpose by cutting in them short parallel slits and so
without removing any of the metal or producing any free ends I isolate strips at
distances apart across the sheet so far as to admit of the strips being bulged
upwards whilst other portions of the sheet lying between the strips are bulged
downwards or vice versa. In this way corrugations extending across the sheet are
formed.
The strips in successive rows or corrugations are arranged alternately, the slit in
one row coinciding with the interval between two slits in the next row and the slits
overlap and extend into the intervals.
Sometimes the corrugations are produced by. bulging all the strips in one
direction and the parts in the intervals in the other direction; or sometimes in
alternate rows the strips are bulged upwards and downwards.
..
The machine by which the sheets are prepared contains a pair of rollers and the
sheets are passed between the rollers. The rollers are formed of steel discs set
upon mandrils. The slits in the sheet metal are produced by teeth upon the discs
which teeth have sharp cutting edges. Each tooth of one roller works against
the side of a tooth on the other roller and the edges operate as shears to slit the
plate which is between them. In the way described counterpart rollers are built up
from discs and these rollers simultaneously slit and corrugate the metal sheet.
Sheets thus prepared have the appearance of wicker work, they are readily fixed
by nails to the brick work or other surface to be covered and the plaster takes a
very firm hold by adapting itself to and slightly overlapping all of the numerous
edges which the prepared sheet presents.
n
COMPLETE SPECIFICATION.
Improvements in Sheet Metal Lathing and in Machinery for Making
the same.
I WILLIAM ECKSTEIN of 187 to 193 Union Street, Borough, in the County of
Surrey, 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 :-
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Thin sheets of iron variously perforated have been employed as a foundation to
receive wall plaster.
I prepare sheets for this purpose by cutting in them short parallel slits and so
without removing any of the metal or producing any free ends I isolate strips at.
distances apart across the sheet so far as to admit of the strips being bulged.
Price Rd 1

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upwards whilst other portions of the sheet lying between the strips are bulged
downwards or vice versa. In this way corrugations extending across the sheet are
formed.
'
The strips in successive rows or corrugations are arranged alternately, the slit in
one row coinciding with the interval between two slits in the next row and the slits
overlap and extend into the intervals.
Sometimes the corrugations are produced by bulging all the strips in one direction
. and the parts in the intervals in the other direction; or sometimes in alternate rows
the strips are bulged upwards and downwards.
The machine by which the sheets are prepared contains a pair of rollers and the
sheets are passed between the rollers. The rollers are formed of steel discs or of
discs of other suitable material set upon mandrils. The slits in the sheet metal are
produced by teeth upon the discs which teeth have sharp cutting edges. Each
tooth of one roller works against the side of a tooth on the other roller and the
edges operate as shears to slit the plate which is between them. In the way
described counterpart, rollers are built up from discs and these rollers simultaneously
slit and corrugate the metal sheet. Sheets thus prepared have the appearance of
wicker work, they are readily fixed by nails to the brick work or other surface to
be covered and the plaster, takes a very firm hold by adapting itself to and slightly
overlapping all of the numerous edges which the prepared sheet presents.
In order that my said invention may be fully understood and readily carried into
effect I will proceed to describe the drawings hereunto annexed.
DESCRIPTION OF THE DRAWINGS,
Figure 1 is a plan of a portion of sheet metal lathing in accordance with my
invention, Figure is a section of the same on the line A A in Figure 1, and
Figure 3 is a section on the line B B of the same figure. This metal lathing
consists of sheet iron about the thickness of stout paper, corrugated and slit with
parallel slits; none of the metal is removed nor is any free end produced but the
part between each two adjacent slits is shaped by bulging it oppositely to the
corrugation it is upon. Along the sheet there are parallel rows of such bulges
occurring alternately upon the ridge and in the hollow; the two faces of the
lathing sheet being alike.
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Figure 4 is an elevation of the machine which I have invented for the production
The
of this metal lathing. Figure 5 is a transverse section of the machine.
machine consists of a bed frame a upon which are carried two parallel rollers b and c.
The upper roller c has upon its axis a spur wheel d which gears with a pinion e on a
driving shaft f. 99 are pinions gearing the rollers together. The rollers b and c
are built up each of a series of discs of chill cast iron (or it may be of steel) strung
upon a central mandril; these discs are shown to a larger scale by the Figures 6 and 7,
Figure 6 showing a transverse section through the rollers b and c taken where plain
or unperforated corrugations are produced. Figure 7 is likewise a transverse
section through the rollers b and c but taken where the slitting of the metal occurs
and the strip is upwardly bulged.
The corrugating discs are marked h h and the discs which co-operating with the
corrugating discs produce the slitting and bulging or shaping of the partially
detached strips are marked i and k.
The discs are arranged on each roller in the following order h, i, h, k, h, i and so
on. The discs and differ in that the undulating outline of the former consists of a
series of convexities and that of the latter of a corresponding series of concavities.
The discs are all of the same thickness except that the discs k are thinned around the
edges to the extent necessary to allow the metal passed between the rollers to leave
them freely. It is convenient to arrange a bench in front of the rollers on which to
place the sheets to be passed through the machine and another bench to receive the
plates as they leave the rollers.
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page_text: 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. The sheet metal lathing herein described.
2. A machine for producing sheet metal lathing, such machine consisting of
corrugating, slitting and bulging or shaping rollers substantially as described.
Dated this 2nd day of March 1893.
W. ECKSTEIN.