An Improved Non-corrosive Material, suitable as a Cement Packing or Covering to Resist Acids.
Year: 1889

page_text: Date of Application, 28th Mar., 1889
Complete Specification Left;- 28th Dec., 1889-Accepted, 1st Mar., 1890
PROVISIONAL SPECIFICATION.
An Improved Non-corrosive Material, suitable as a Cement Packing
or Covering to Resist Acids.
1, BENJAMIN RHODES of 234 and 240 Bow Road in the County of Middlesex,
Brass Founder, do hereby declare the nature.of this invention to be as follows:-
Heretofore I have been in the habit of making an acid-resisting material of a
mixture of india-rubber, asbestos and sulphur together with a solvent, the mixture
being vulcanized by heat.
1
According to this invention 1 add mica or tale or both.
I take the following substances in about the proportions given below and I proceed
to prepare them in the following way:―viz.:
Para rubber in solution
Asphaltum
Albo-carbon
Mica
do.
do.
in fine powder
Flower of Sulphur do.
Talc
do.
-
25 per cent.
5
"
-
5
"
*20
"
-
3
"
-
""
These ingredients are thoroughly mixed together and solvent added until the
mixture is about the consistence of cream when I add the strongest fibrous asbestos
carefully prepared and freed from any impurity 40%. The mass is then kneaded
together until it is as dough when it may be forced into moulds or rolled into
sheet and dried when a felt is produced for jointing purposes or before drying it may
be passed through a set of rollers with sharp spikes and teazled out into a kind of tow
or oakum or woolly substance suitable for caulking into any space where a tight joint
is desired as the sockets of pipes, grooves of locks, linings for ditto, &c.
More rubber and sulphur may be added so as to form a more solid and compact
material for cutting into rings &c. and making flange joints and for other purposes.
I then vulcanize in the usual way.
I sometimes also vary the foregoing proportions for special uses, for instance more
mica and less asbestos may be used, or less mica and more tale or vice versa.
Dated thir 27th day of March 1980
COMPLETE SPECIFICATION.
An Improved Non-corrosive Material, suitable as a Cement Packing
or Covering to Resist Acids.
•
I BENJAMIN RHODES of 234 and 240 Bow Road in the County of Middlesex,
Brass Founder, do hereby declare the nature of this invention and in what manner the
same is to be performed to be particularly described and ascertained in and by the
following statement :-
―
Heretofore I have been in the habit of making an acid resisting material of a mixture
of india rubber, asbestos and sulphur together with a solvent, the mixture being
vulcanized by heat.
According to this invention I add mica or talc or both.

page_text: I take the following substances in about the proportions given below, and I proceed
to prepare them in the following way viz.:
(.
Para rubber in solution
Asphaltum
do.
Albo-carbon
do.
Mica
in fine powder
Talc
'a do.
25 per cent.
5
5
"
"
20
"
3
"
2
Flower of sulphur do.
ܙܕ
These ingredients are thoroughly mixed together and solvent such as rectified
mineral spirit added until the mixture is about the consistence of cream. I employ,
about one gallon of spirit to each pound of rubber. I then add the strongest fibrous
asbestos carefully prepared and freed from any impurity 40%. The mass is then
kneaded together, until it is dough when it may be forced into moulds or rolled into
sheet and dried when a felt is produced for jointing purposes. Or before drying it
may be passed through a set of rollers with sharp spikes or otherwise teázled out
into a kind of tow or oakum or woolly substance suitable for caulking into any space
where a tight joint is desired, as the socket of pipes grooves of cocks linings
for ditto &c.
More rubber and sulphur may be added, so as to form a more elastic and flexible
material. In which case I prepare the mixture with asbestos of very short fibre, and
then add more rubber in the usual-way by passing through heated rollers until all is
thoroughly mixed, when the mass may be rolled into sheets or cut into rings &c. and
then vulcanized in the ordinary way, of course with sufficient sulphur for vulcanization.
In this latter case the rubber is added in a pure state, and not in solution.
I sometimes also vary the foregoing proportions for special uses, for instance, more.
mica and less asbestos may be used, or less mica and more talc or vice versa.
By the use of mica and tale in this asbestos compound in the manner described, I
obtain the following advantages:
1st. When used as a jointing medium, there is less liability to stick to the surfaces.
2id. As a gland packing it presents a bright and better wearing surface than
ordinary asbestos.
3rd. The mica being unaffected by acids it is most valuable as a lining for cocks,,
used for acids and chemical purposes.
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
1. The coating or covering fibrous asbestos with mica and tale or either of them
by the aid of vegetable gums in solution to form an acid resisting packing or jointing
material for the purposes set forth.
2. Non-corrosive packing or covering materials substantially as herein described.
Dated this 27th day of December 1889