AN IMPROVED MANUFACTURE OF ARTIFICIAL MARBLE, OR IMITATION OF OTHER ORNAMENTAL STONE.
Year: 1881

page_text: LETTERS PATENT to Bernard O'Neill, of No. 189, Blackfriars Road, in the
"
County of Surrey, for an Invention of AN IMPROVED MANUFACTURE OF
ARTIFICIAL MARBLE, OR IMITATION OF OTHER ORNAMENTAL STONE.'
PROVISIONAL SPECIFICATION left by the said Bernard O'Neill at the Office
of the Commissioners of Patents on the 17th November 1881.
BERNARD O'NEILL, of No. 189, Blackfriars Road, in the County of Surrey.
"AN IMPROVED MANUFACTURE OF ARTIFICIAL MARBLE OR IMITATION OF OTHER
ORNAMENTAL STONE."
My Invention relates to the manufacture of slabs, mantel pieces, columns, or
other pieces of structure in imitation of marble or other ornamental stone, which
I effect in the following manner :-I 'mix approximately equal weights of Portland
cement, blue lias cement, cinder or coke dust, and marble dust with water in
which is dissolved about one per cent. of borax to a pasty consistency; and this
mixture I run into moulds to give the desired shapes. I leave the mixture in the
moulds for about 24 hours or until it is thoroughly set, and then remove the casts
and dry them, after which I smooth carefully by rubbing with sand paper the
surfaces that are to be enamelled. For enamelling I apply a succession of coats
of varnish, preferably in the following order, best tar varnish, Pontypool varnish,
pale mixing varnish, copal varnish, and extra fine polishing varnish. After
applying each coat of varnish I bake the casts for about 24 hours in an oven
at a temperature of 150° to 200°, and then rub off by pumice stone all roughnesses.
After the final baking and rubbing I polish the surface with rotten stone applied
by the hand until it attains a brilliant polish. The desired colours are applied along
with some of the coats of varnish, the ground colour being preferably applied with
the first coat of varnish, and the veins or streaks being applied with some of
the succeeding coats.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Bernard O'Neill in the Great Seal Patent Office on the 16th May
1882.
BERNARD O'NEILL, of No. 189, Blackfriars Road, in the County of Surrey.
"AN IMPROVED MANUFACTURE OF ARTIFICIAL MARBLE, OR IMITATION OF OTHER
ORNAMENTAL STONE."
My Invention relates to the manufacture of slabs, mantel pieces, columns, or
other pieces of structure in imitation of marble or other ornamental stone, which I
effect in the following manner :-I mix approximately equal weights of Portland
cement, blue lias cement, cinder or coke dust, and marble dust with water, in which
is dissolved about one per cent. of borax to a pasty consistency, and this mixture
I run into moulds to give the desired shapes. I leave the mixture in the
moulds for about 24 hours or until it is thoroughly set, and then remove the casts
and dry them, after which I smooth carefully by rubbing with sand paper the
surfaces that are to be enamelled. For enamelling I apply a succession of coats of
varnish, preferably in the following order, best tar varnish, Pontypool varnish, pale
nixing varnish, copal varnish, and extra fine polishing varnish. After applying
cach coat of varnish I bake the casts for about 24 hours in an oven at a temperature
of 150° to 200° Fahrenheit, and then rub off by pumice stone all roughnesses.
After the final baking and rubbing I polish the surface with rotten-stone-applied-
by the hand until it attains a brilliant polish. The desired colours are applied
along with some of the coats of varnish, the ground colour being preferably
applied before the first coat of varnish, and the veins or streaks being applied
between some of the succeeding coats.
Having thus described the nature of my Invention and in what manner the same
is to be performed, I claim,-
The manufacture of artificial marble or imitation of other ornamental stone,
substantially as herein described.
In witness whereof, I, the said Bernard O'Neill, have hereunto set my hand
and seal, this Sixteenth day of May, in the year of our Lord One thousand
eight hundred and eighty two.
B. O'NEILL. (L.S.)