MENTS IN BATHS
Year: 1881

page_text: PROVISIONAL SPECIFICATION left by the said Charles Drake at the Office
of the Commissioners of Patents on the 20th August 1881.
CHARLES DRAKE, of Battersea, in the County of Surrey, Builder.
MENTS IN BATHS."
"IMPROVE
My Invention relates to improvements in cement baths, whereby a novel
combination of material is used in their construction to enable the easy pro-
duction of a marble-like polish on their interior face.
I employ in their construction a concrete composed of either marble or granite
chippings and Portland cement of fine quality, combined in such a manner as to
offer the largest possible surface of the marble or granite on the face of the concrete
to be polished, with the least amount of cement necessary to secure the proper
cohesion.
The marble or granite chippings must previously be thoroughly cleansed and
should be crushed into pieces of variable size, pieces as large as sixpences, together
with smaller particles. The Portland cement must be of fine quality, sifted, so
as to exclude all gritty particles.
The materials when so prepared are thoroughly mixed with water and placed
promptly in the mould. When greater hardness and capability of polish on the
surface is required, the moulded material is placed in a silicate bath. When
set, the interior surface of the bath may then be polished by known methods for
polishing stone or marble.
It will be found that a hard glassy polish, equal to that of marble, can be given
to the surface of this marble concrete.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Charles Drake in the Great Seal Patent Office on the 17th February
1882.
CHARLES DRAKE, of Battersea, in the County of Surrey, Builder.
MENTS IN BATHS."
" IMPROVE-
My Invention relates to improvements in concrete baths, whereby a novel
combination of materials is used in their construction to enable the easy pro-
duction of a marble like polish on their interior face.
I employ in their construction a concrete composed of either marble or granite
chippings and Portland cement of fine quality, combined in such a manner as to
offer the largest possible surface of the marble or granite on the face of the concrete
to be polished, with the least amount of cement necessary to secure the proper
cohesion.
The marble or granite chippings must previously be thoroughly cleansed, and
should be crushed into pieces of variable size, pieces as large as sixpences, together
with smaller particles.
The materials when so prepared are thoroughly mixed with water and placed
promptly in the mould. When greater hardness and capability of polish on the
surface is required, the moulded material is placed in a silicate bath.
The Portland cement must be of fine quality, sifted, so as to exclude all gritty
particles.
When set the interior surface of the bath may then be polished by known
methods for polishing stone or marble. Different shades may be used to forin
devices or patterns if required.
It will be found that a hard glassy polish, equal to that of marble, can be given
to the surface of this marble concrete.
And having now fully described and ascertained the nature and object of my
Invention and the manner in which the same is to be performed, be it known that
what I consider novel and useful and desire to protect by my Letters Patent is,-
I. The construction of a bath of marble or granite crushed to selected sizes and
cleansed, combined with a minimum quantity of fine Portland cement to give a
face capable of receiving direct polish, substantially as and for the purposes
specified.
II. The treatment of a bath so constructed in a silicate bath to give extra
hardness for improved polish, substantially as and for the purposes specified.
In witness whereof, I, the said Charles Drake, have hereunto set my hand.
and seal, this Sixteenth day of February, in the year of our Lord
eighteen hundred and eighty-two.
Signed, sealed, and delivered
in the presence of
S. P. WILDING,
23, Rood Lane,
London, E.C.,
Patent Agent.
CHARLES DRAKE. (L.S.)