A NEW OR IMPROVED FIRE-PROOF LIQUID COMPOUND TO BE USED ALONE OR MIXED WITH COLOR TO FORM A PAINT FOR COATING WOODWORK FABRICS AND SUCH LIKE ΤΕΤ ΑΑΓΑΓΑΤro MATERIAIS TA DENDED THEE LYAC WDEDDOOR
Year: 1882

page_text: LETTERS PATENT to William Astrop Chemist and Robert Ridgway both of
Homerton in the County of Middlesex, for an Invention of A NEW OR
IMPROVED FIRE-PROOF LIQUID COMPOUND TO BE USED ALONE OR MIXED WITH
COLOR TO FORM A PAINT FOR COATING WOODWORK FABRICS AND SUCH LIKE
ΤΕΤ ΑΑΓΑΓΑΤro
MATERIAIS TA DENDED THEE LYAC WDEDDOOR
PROVISIONAL SPECIFICATION left by the said William Astrop and Robert
Ridgway at the Office of the Commissioners of Patents on the 17th August
1882.
WILLIAM ASTROP, Chemist and ROBERT RIDGEWAY both of Homerton in the
County of Middlesex "A NEW OR IMPROVED FIREPROOF LIQUID COMPOUND TO BE
USED ALONE OR MIXED WITH COLOR. TO FORM A PAINT FOR COATING WOODWORK
FABRICS AND SUCH LIKE INFLAMMABLE MATERIALS TO RENDER THEM FIREPROOF
"
This invention relates to a new or improved fire proof liquid compound to be
used alone or mixed with color to form a paint for coating woodwork fabrics and
such like inflammable materials to render them fireproof.
According to our invention we first dissolve alum in any required quantity of
pure water. The solution is then treated with a solution of ammonia or any well
known precipitant by which a gelatinous precipitate of Hydrate of alumina is
thrown down. It is then collected by a suitable filtering process and well washed
on the filter and afterwards dried and pulverized ready for mixing with an alkaline
Silicate (such as soluble glass) which by decomposition forms a basic silicate of
alumina or liquid cyanite the mixing to be done in a kind of Mortar or paint mill
and the pulverised alumina should be added gradually to the alkaline silicate until
the required density has been obtained to be afterwards diluted with water to suit
the material that has to be coated. It may be used as a plaster but in most cases
it will be preferable to be used with an ordinary paint brush or the article to be
coated dipped into it. With regard to old theatrical scenery it will be sufficient
to coat the back only, but for new scenery the priming should be mixed with
the paint.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said William Astrop and Robert Ridgway in the Great Seal Patent Office
on the 17th February 1883.
WILLIAM ASTROP of 31 Templar Road Homerton in the County of Middlesex
(Chemist) and ROBERT RIDGWAY of N° 5 Churchill Road Homerton also in the
County of Middlesex "A NEW OR IMPROVED FIREPROOF LIQUID COMPOUND TO BE
USED ALONE OR MIXED WITH COLOR TO FORM A PAINT FOR COATING WOODWORK
FABRIOS AND SUCH LIKE INFLAMMABLE MATERIALS TO RENDER THEM FIREPROOF
Our Invention relates to a new or Improved Fireproof Liquid Compound to be
used alone or mixed with color to form a paint or varnish for Coating Woodwork
fabrics and such like inflammable materials to render them fireproof
In carrying out our Invention we first make a saturated solution of Alum in any
required quantity in pure water, we then treat this solution with Ammonia or any
well known precipitant by which a gelatinous precipitate of Hydrate of Aluminæ
is thrown down. The precipitate is collected by a suitable filtering process and well
washed on the filter, to be afterwards dried and pulverized ready for mixing with
an Alkaline Silicate (such as the Silicate of soda or Silicate of Potash commonly
known as soluble glass) which by chemical decomposition is formed into a basic
Silicate of Alumina as "Liquid Cyanite." The Mixing should be done in a kind of
Mortar or paint Mill taking care to add the pulverized Alumina gradually to the
Alkaline Silicate until the required density has been obtained. The Compound may
then be diluted with water to suit the material to be treated. But in some
instances we find it preferable to use the alkaline silicate and the Hydrate of
Alumina separately
The compound may be used as plaster, but in most cases it should be used with
an Ordinary paint or distemper brush taking care that it is well rubbed into the
pores and fibres of the article treated. Fabrics may in most instances be dipped and
wrung out dried and ironed after the manner of ordinary starching, Oil Paintings
and old Theatrical scenery may be coated on the back but for new paintings the
canvas should be primed with the compound. All kinds of woodwork should be
well treated with the compound before it is painted or varnished it should be well
dried, it will then take oil paint, size and spirit varnish without in any way altering
the appearance in any way, so that it is well adapted for Furniture, Match Linings
partitions, Church and Chapel fittings and particularly for Theatres both for the
Stage and Auditorium.
Having fully described the nature and particulars of our said Invention we desire
it to be distinctly understood that we do not confine ourselves to the exact details
berein set forth as such may be varied or modified without departing from the
principle hereof; but we claim―
The use of an Alkaline Silicate and Hydrate of Alumina together or separately
as a fire resisting compound which may be applied to anything of an inflammable
nature.
In witness whereof we the said William Astrop and Robert Ridgway have
hereunto set our hands and seals this Sixteenth day of February One thousand
WILLIAM ASTROP (L.S.)
ROBERT RIDGWAY (LS.)