Year: 1898

page_text: Date of Application, 9th Aug., 1898-Accepted, 22nd Oct., 1898
This
Paris or similar material and of a backing or core of woven wire fabric.
fabric is exposed through the slots of the slabs and is engaged by the usual mortar
coating so as to constitute binding surfaces. It also projects beyond and is exposed
along the edges of the slabs to form a selvage, which permits the construction
of a seamless wall or partition.
In the accompanying drawing;
Figs. 1 and 2 are face views of two forms of my improved plaster board.
Fig. 3 is a bottom view thereof.
Fig. 4 an edge view thereof.
Fig. 5 a longitudinal section showing the plaster coating applied.
Fig. 6 a transverse section of a pair of adjoining plaster boards with the plaster
coating applied.
Fig. 7 a face view partly in section of a modification, and
Fig. 8 a cross section of the plaster board showing it curved.
a, represents the body of the plaster board which may be either of limited
length and rigid (Fig. 1) to form a slab, or may be of indefinite length and be
transversely cracked as at a2, (Fig. 2) to be readily rolled up and attachable to
curved surfaces (Fig. 8).
The plaster board a, is provided with a backing or core 6, of woven wire fabric,
These
which is exposed in part through a number of slots a¹, formed in body a.
slots thus form means for engaging the keys c¹, of the usual mortar coating c,
that project into the slots and adhere firmly to the backing b.
The fabric b. also projects laterally beyond the edges of body a, to form a rigid
selvage b¹, which permits the joints between the boards to be effectively closed
up in such a manner that the seams will not crack and that the plaster boards
may be intimately united into a continuous wall.
In use, the adjoining boards are secured to the studding with their selvages b¹,
overlapping (Fig. 6) though such selvages may also be placed edge to edge.
When the mortar coating c, is now applied, it will enter the grooves above the
selvage and form keys, that will join the boards into a continuous wall.
In order to permit the mortar to work through the rigid open work selvage
and into the back of the plaster boards a, I provide the rear face of the latter
with a series of transverse grooves a³, that connect the slots a¹, of each row with
one another (Fig. 3). Thus the mortar is free to be pressed through the selvage b',
into the grooves a³, and also into the openings a¹, from the rear. The effect is

page_text: that the boards will be intimately connected by the mortar at the front, the edges
and the back, so that a most intimate and durable union is formed.
In Figure 7, the plaster board is not provided with a continuous wire backing
or core, but with strips of woven wire fabric d, let into its edges, so as to form
the laterally projecting rigid selvages d'; otherwise the construction is the same
as above described.
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. A plaster board composed of a slotted body and of a woven wire fabric which
is partly exposed through the slots of the body, substantially as specified.
2. A plaster board composed of a slotted body and of a woven wire fabric which
extends beyond the edges of the bedy to form a rigid selvage, substantially as
specified.
3. A plaster board composed of a slotted body, having transverse grooves on
its back, and of a woven wire fabric that is partly exposed through the slots and
also along the edges of the board, substantially as specified.
4. A plaster board constructed substantially as herein shown and described.
Dated this 9th day of August 1898.
ALLISON BROS,
Agents for the Applicant.