Year: 1888

page_text: Date of Application, 21st Jan., 1888-
Specification Accepted, 24th Feb., 1888
I ANNIE MATILDA WOOD of 13 Delahay Street in the City of Westminster, County
of Middlesex, Gentlewoman do hereby declare the nature of my invention, and in what
manner the same is to be performed, to be particularly described and ascertained
in and by the following statement :-
The object of this invention is to manufacture a compound or compounds of or
from a combination of Para Rubber or its equivalent with the substances hereinafter
set forth the same being amalgamated under the application of heat and moulded into
any desired article or form and then cured by sulphur or heat in the ordinary way
according to which rubber compounds are cured in order to bring the article so made
into a solid compact or spongy body somewhat soft to the touch yet sufficiently hard
to withstand abrasion or friction.
The hereinafter described composition for solid compact substance is unaffected by
the atmosphere, by acids, and by oils which renders it particularly suited as glands or
packing for engines, pumps & the like and will answer all the purposes for which
ebonite, vulcanite or similar products are now, used. The proportions of the
ingredients or their equivalents may be varied to suit the particular purpose for which
it is intended and as an example of the proportions I take say:-
same add
40% Para Rubber & 10% Whalebone ground, shreded or otherwise and to
20% Asbestos Fibre.
20% Asbestos Powder.
5% Earth Wax.
5% Carbon.
2% Sulphur.
10
These are admixed with the Para Rubber while in a semi-plastic state by rollers or

page_text: For the manufacture of "Light Sponge " I take
1 part Alum.
"
1
"
31
"
31
51
"
وو
Tungstate of Soda.
Borax.
Camphor.
Lampblack.
Carbonate of Ammonia.
These I mix with 50% Para Rubber and 2% Sulphur while in a soft or semi-
plastic state and roll it into sheets or spread, or mould it to the required thickness,
the sheets or articles so made are then cured in a similar way to which ordinary
rubber compound goods are cured, as sponge.
For my "intermediate sponge" I take
1 part Alum.
Tungstate of Soda.
Camphor.
""
"
Borax.
"
1
د"
Lampblack.
Chloride of Ammonium.
50% Para Rubber.
2% Sulphur.
These when thoroughly mixed and rolled into sheets or shaped to form articles are
cured as above mentioned.
For what I term "heavy sponge "I take
1 part Camphor.
Borax.
3
1
10
"
"
"
Lampblack.
Chloride of Ammonium.
50% Para Rubber.
2% Sulphur.
о
And treat them in the manner described with reference to my "Light Sponge,"
and "Intermediate sponge."
Sponge made according to my invention is very buoyant, yielding and supple and
is specially adapted for boats canoes and the like to resist the impact of shot and when
pierced to close up the opening again.
The above examples constituting my compounds are subject to variations in the
several proportions.
Having now particularly described & ascertained the nature of this inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
The several compositions or combination of ingredients hereinbefore mentioned and
the manufacture of articles for various useful purposes therefrom as set forth.
HERBERT & Co.,
18, Buckingham Street, Strand, W.C.,
Agents to Applicant.