An Improved Plaster Board for Walls and Ceilings.
Year: 1893

page_text: Date of Application, 20th May, 1893
Complete Specification Left, 20th Feb., 1894-Accepted, 21st Apr., 1894
PROVISIONAL SPECIFICATION.
An Improved Plaster Board for Walls and Ceilings.
We, JAMES D. BAKER, and CHARLES FYFE, both of 50 and 52 Constant
Street Montreal, Canada, Gentlemen, do hereby declare the nature of this
invention to be as follows:-
This invention has reference to an improved plaster board for covering walls and
ceilings; the object of the invention being to provide means whereby adjacent
boards may be secured together by a suitable plastic filling.
By this invention, the plaster board is formed of a plaster facing and backing
having a sunken face round two of its edges and strips of textile fabric secured in
its other two edges between the backing and facing and adapted to lie in the
sunken faces of adjacent boards by means of which the said adjacent boards may
be secured together by a suitable plastic filling.
Dated this 20th day of No 1902
W. H. MUNNS,
Agent for Applicants.
COMPLETE SPECIFICATION.
An Improved Plaster Board for Walls and Ceilings.
We JAMES D. BAKER and CHARLES FYFE both of 50 and 52 Constant Street
Montreal, Canada, Gentlemen, 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 :-
Our invention has reference to the sections of plaster sheeting affixed to walls
and used as ceilings and more especially to the means by which the edges of the
several sections are secured together so as to obviate their shrinking apart.
Up to the present time it has been necessary, in order to give a presentable
appearance to a wall or ceiling covered with, or composed of plaster sheeting, to
cover the whole surface with a coat of mortar. By this invention this is not
needed, the ceiling or wall lining presenting a perfectly even and unbroken surface.
The plaster boards to which our invention refers are usually formed of a facing
coat of plaster and a backing, the meeting edges of which may be of any corre-
sponding sections. In this construction the plaster facing is omitted for any
desired width on two adjacent sides of the board, so as to afford a sunken face, the
other two adjacent sides (presuming that, as usual, the board is four-sided) being of
the full thickness of the board both backing and facing. In these last two adjacent
sides are set strips of textile fabric projecting from their faces and approximately
of the width of the sunken faces on the other two sides of the board.
When two boards are brought together the edge of one board which is of the
full thickness is brought against and meets the edge of the other board which has
the sunken face.
As soon as they are in contact the textile strip projecting from the edge of the
one board will be laid upon the sunken face of the other and secured in place by
plaster size or other means. The space left by the sunken face on the edge of the
one board is then filled up by plaster as shown and a finishing coat usually put on.
ר..'.D

page_text: .
In some cases the face of the boards may be sunk all round the edges and the
textile strips projecting beyond the edges of the boards be secured thereon, the one
on the other so as to give a double thickness of binding material.
For full comprehension however of the invention, reference must be had to the
annexed drawings in which :-
:-
Fig. 1, is a sectional view showing the edges of two boards apart; Fig. 2, a
similar view showing them joined together and Fig. 3, a modification of same.
Like symbols denote the same parts.
A is the plaster facing of the board and B the backing; C being a strip of
textile material such as canvas, held between them or in the backing.
A shows the sunken face on two edges of the board.
As will be seen in Fig. 2 the space left by the sunken face A' is, when the
strip C is secured down on the top of the backing, filled in by plaster as at D, so
as to give the even surface.
In Fig. 3 both boards have the sunken face A' on their meeting edges, and the
strips C are wide enough to cover both, one being laid on the top of the other. It
will be understood that this invention is applicable to all plaster boards composed
of plaster facing and a backing of any kind, & that the meeting edges of the
boards may be of any outline, or simply butt against each other.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is: :-
A plaster board formed of a plaster facing and backing having a sunken face
round two of its edges and strips of textile fabric secured in its other two edges
between the backing & facing and adapted to lie in the sunken faces of adjacent
boards by means of which adjacent boards may be secured together by a suitable
plastic filling.
Dated this 20th day of February 1894.
W. H. MUNNS,
55, Chancery Lane.