THE MANUFACTURE OF WATERPROOF COMPOSITIONS
Year: 1876

page_text: LETTERS PATENT to William Dummer, of Southsea, in the Parish of Portsea,
in the County of Southampton, Gentleman, for the Invention of "THE
MANUFACTURE OF WATERPROOF COMPOSITIONS."
Sealed the 1st September 1876, and dated the 11th March 1876.
PROVISIONAL SPECIFICATION left by the said William Dummer at the Office
of the Commissioners of Patents on the 11th March 1876.
WILLIAM DUMMER, of Southsea, in the Parish of Portsea, in the County of South-
ampton, Gentleman. "THE MANUFACTURE OF WATERPROOF COMPOSITIONS."
This Invention has for its object improvements in the manufacture of waterproof
compositions suitable for covering damp walls, internally or externally, iron, zinc,
stone, wood, canvas, cotton, woollen cloth, and other textile fabrics, which suffer
from damp and exposure to weather, and for a waterproofing generally in colors.
My improved composition is intended to be applied with a brush. It may be
applied either heated or cold.
My said improved compositions are formed of the following ingredients:-White-
lead, driers, rosin oil, Hay's Patent varnish, petroleum spirit, spirit of turpentine,
rosin, india-rubber; or instead of spirit of turpentine I use oil, naphtha, or any other
spirit or essential oil, and I combine two or more of these ingredients, and mix
them with white lead and driers, and add colouring matter to meet the require-
ments.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by the
said William Dummer in the Great Seal Patent Office on the 8th September
1876.
WILLIAM DUMMER, of Southsea, in the Parish of Portsen, in the County of South-
ampton, Gentleman. "THE MANUFACTURE OF WATERPROOF COMPOSITIONS.'
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My Invention of waterproof compositions is adapted to all classes of internal and
external work where common paint could be used, and is specially suitable for all
textile fabrics, as well as wood and iron work.

page_text: I first make 3 separate compositions as follows:-
1. I take of rosin oil 10 lbs.; caoutchouc or india-rubber, four ounces; and boil
them together until dissolved; or I take spirit of turpentine, spirit of rosin, rectified
naphtha, or any other essential oils or solvent of caoutchouc, in which I dissolve
caoutchouc or india-rubber, in the proportion of five ounces to one gallon. I call
thus composition " flux."
2. I also take of boiled pine or rosin oil 4 gallons, to which I add one quart of
flux, and mix together. This I call" oil composition."
3. I also take rosin, three pounds; of oil composition, one quart; and boil them
together, to which I add when cool spirits of turpentine, rosin, spirit of naphtha, or
any other essential oil or spirit three pints, to which is added sugar of lead 1½ ozs.;
of litharge, 1 ozs.; terabene, 8 fluid ounces. This I call "bright varnish."
I now take of dry or ground lead, 10 lbs.; dryers, 30 ounces, to which I add 30
fluid ounces of bright varnish; oil composition, 5 fluid ounces; petroleum, spirit of
turpentine, rectified naphtha, or any other essential oils or spirits, 10 fluid ounces.
These I mix together and color with anotine or any other coloring pigments, and
stir or agitate them together until the color and consistency required has been
obtained. This completes the manufacture of my enamel waterproof composition
or paint, which may be applied and used just in the same way as ordinary paint.
Having thus described the nature of my Invention, and the manner of performing
the same, I would have it understood that I claim, the manufacture of waterproof
compositions, substantially as herein-before described.
In witness whereof, I, the said William Dummer, have hereunto set my hand
and seal, this First day of September, in the year of our Lord One thousand
eight hundred and seventy-six.
W. DUMMER. (L.S.)