Percha, and Analogous Gums.
Year: 1887

page_text: Date of Application, 10th May, 1887
Complete Left, 10th Feb., 1888
Complete Accepted, 4th May, 1888
Percha, and Analogous Gums.
I ANNIE MATILDA WOOD of 13 Delahay Street, Westminster in the County of
Middlesex, and Firs Cottage, East Sheen in the County of Surrey Gentlewoman do
hereby declare the nature of this invention to be as follows:-
My invention has for its object the preservation of India Rubber, Caoutchouc,
Gutta Percha and analagous gums and articles manufactured from them, from
deterioration and decay, and from the destructive effects of steam, heat, oils &c. which
end I effect by the use of various chemical combinations and mechanical admixtures
which not only improve the material and at to its strength, resilence and resistance
but also considerably reduce the cost so that it can be more generally applied.
For the chemical combinations with Caoutchouc, I adopt the following materials and
formulas.
A Sal Ammoniac
Boracic Acid
Borax Pure
Gum Kauri
-
Tungstate Ammonia
B Tungstate of Soda
Alum
Carbonate Ammonia
-
-
-
Asbestos (fine powder)
Arsenic
Gum Kauri
55 parts
24
"
13
"
5
"
3
"
100
"
18 422555
"
->
10
"
20
""
-
15
"
"
"
-
100

page_text: Improvements in the Treatment of India Rubber, Caoutchouc, Gutta-
percha, and Analogous Gums.
I, ANNIE MATILDA WOOD of 13 Delahay Street Westminster in the County of
Middlesex and Firs Cottage, East Sheen in the County of Surrey, Gentlewoman, do
hereby declare the nature of this invention and in what manner the same is to be
performed to be particulary described and ascertained in and by the following
statement:-
This invention consists in certain novel compounds or combinations of materials
adapted to be mixed with rubber and similar gums for the formation therewith of
compositions or materials useful for the manufacture or constitution of a variety of
articles suitable for the purposes for which rubber compounds are available. The
general purpose of the invention is to provide a cheap substitute for the more
expensive rubber compounds heretofore used such substitute or substitutes being more
durable and capable of withstanding effects of steam heat, oil, acids, and mechanical
wear in an eminent degree.
The following are examples of the compounds or combinations aforesaid.
A Sal Ammoniac
Boracic Acid
Borax Pure
Gum Kauri
Tungstate Ammonia
B Tungstate of Soda
Alum
Carbonate Ammonia
Asbestos (fine powder)
Arsenic
Gum Kauri
-
-
55 parts
24
"
13
"
"
"
100
-
45. parts
10
"
20
"
.15
5
12
5
"2
Oxidised Linseed Oil -
Gum Kauri
-
Sulphate of Ammonia
Boracic Acid
1111
100
7 parts
-
-
10
"
-
"
-
18
"3

page_text: For frictional or rough surface or for mats, stair treads &c. I find the addition of
whalebone either shredded, in shavings or as an impalpable powder will give most
valuable results.
For example for frictional compound. I combine the following
Camphor Wood, ground.
Catechu.
Tannin.
Asbestos Fibre..
Para rubber.
This compound will not suffer from deterioration or oxidation in consequence of the
chemical combination occuring with or among the ingredients.
I also use,
Whalebone Shavings or Shreds.
Camphor Wood, ground.
Arsenic, ground.
Para Rubber.
To this I sometimes add Asbestos Fibre and powder.
The following is a mode of proceeding for carrying out or utilizing my invention
I take the ordinary compounds of Rubber, gutta-percha, or the like, prepared accord-
ing to the usual trade formulas and add, in the course of manipulation of the raw
material in the masticator or callender the desired chemical compound thus to render
the rubber compound uninflammable I distribute on the sheet rubber as it passes
through the mixing rollers a sprinkling of the compound A, each rolling and working
in the mixing rollers will ultimately mix the compound in the same manner and at the
same time that the sulphur for vulcanizing is added. This mode of utilizing my
improved materials, is however no part of my invention.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
Separately or in combination the compounds A B C D E comprising the materials
set forth, or some of them with or without admixture of Whalebone, Camphor-wood,
catechu tannin or arsenic for the purpose set forth.
1000
HERBERT & Co.,
18, Buckingham Street, Strand, London, W.C.,
Agents to Applicant.