IMPROVEMENTS IN WATERPROOFING SUB- STANCES PERMEABLE TO AIR
Year: 1876

page_text: LETTERS PATENT to Herbert John Haddan, of the Firm of Herbert and
Company, Patent Agents, of 67, Strand, in the City of Westminster, Civil
Engineer, for the Invention of "IMPROVEMENTS IN WATERPROOFING SUB-
STANCES PERMEABLE TO AIR." A communication from abroad by Achille du
Bled and Charles Dujardin, both of 24, Rue du Frère Philippe, Paris, in the
Republic of France.
Sealed the 29th December 1876, and dated the 21st July 1876.
PROVISIONAL SPECIFICATION left by the said Herbert John Haddan at
the Office of the Commissioners of Patents on the 21st July 1876.
HERBERT JOHN HADDAN, of the Firm of Herbert and Company, Patent Agents,
of 67, Strand, in the City of Westminster, Civil Engineer. "IMPROVEMENTS IN
WATERPROOFING SUBSTANCES PERMEABLE TO AIR." A communication from
abroad by Achille du Bled and Charles Dujardin, both of 24, Rue du Frère Philippe,
Paris, in the Republic of France.
The improvements are intended to render, and can be applied to, all kinds of
textile fabrics, leather, rope, forinium, paste-board, paper, stone, wood, bone, or any
substance permeable to the atmosphere waterproof without preventing the free
circulation of air through such substances.
The improvements are to be performed by treating the substances to be rendered
waterproof with the following materials, or their chemical equivalents, or some of
them, in solution, and in proportions, or near thereto, following:-For each 100 litres
of solution, viz., 1 kilo of sulphate of zinc crystallised in needles, 1 kilo of proto-
chloride of tin, also crystallized 280 grammes of English calcinated magnesia, 50
litres of hot water (soft rain or distilled), 1 kilo of fucus crispus, 200 grammes of
mallow root, 200 grammes of linseed, 100 grammes of gum arabic, 400 gramines of
stearine, 50 litres of cold water (soft rain or distilled), dissolve, mix and use for
textile and vegetable fabrics with a mordant formed by adding /rds of a
solution of acetate of soda, or chemical equivalent, composed by dissolving 2 kilos
of acetate of soda in 100 litres of water.
The articles and substances to be rendered waterproof can be dipped in, or
washed with, or otherwise treated with the mixture or solution, and with or without
the mixture of a mordant, as desired.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Herbert John Haddan in the Great Seal Patent Office on the 30th
December 1876.
HERBERT JOHN HADDAN, of the Firm of Herbert and Company, Patent Agents,
of 67, Strand, in the City of Westminster, Civil Engineer. IMPROVEMENTS IN
WATERPROOFING SUBSTANCES PERMEABLE TO AIR. A communication from abroad
by Achille du Bled and Charles Dujardin, both of 24, Rue du Frère Philippe, Paris,
in the Republic of France.
The improvements are intended to render, and can be applied to, all kinds of
textile fabrics, leather, rope, formium, paste-board, paper, stone, wood, bone, or any
substance permeable to the atmosphere waterproof without preventing the free
circulation of air through such substances.
some of
The improvements are to be performed by treating the substances to be rendered
waterproof with the following materials, or chemical equivalents, or
them, in solution, and in proportions, or near thereto, following:-For each 100 litres
of solution, viz., 1 kilo of sulphate of zinc crystallised in needles, 1 kilo of proto-
chloride of tin, also crystallised, 280 grammes of English calcinated magnesia,
50 litres of hot water (soft rain or distilled), 1 kilo of fucus crispus, 200 grammes
of mallow root, 200 grammes of linseed, 100 grammes of gum arabic, 400 grammes
of stearinc, 50 litres of cold water (soft rain or distilled), dissolve, mix, and use
for textile and vegetable fabrics with a mordant formed by adding 2/rds of a
solution of acetate of soda in 100 litres of water.
The articles and substances to be rendered waterproof can be dipped in, or
washed with, or otherwise treated with the mixture or solution, and with or without
the mixture of a mordant, as desired.
In witness whereof, I, the said Herbert John Haddan, have hereunto set my
hand and seal, this Thirtieth day of December, in the year of our Lord One
thousand eight hundred and seventy-six.
H. J. HADDAN. (L.S.)