IMPROVE. MENTS IN THE MANUFACTURE OF COMPOUND INDIA-RUBBER SHEETS OR SURFACES PROVISIONAL SPECIFICATION APPLICABLE TO VARIOUS USEFULPURPOSES
Year: 1874

page_text: LETTERS PATENT to Gavin Thomson and George Watson, both of
Deptford, in the County of Kent, for the Invention of "IMPROVE.
MENTS IN THE MANUFACTURE OF COMPOUND INDIA-RUBBER SHEETS OR SURFACES
PROVISIONAL SPECIFICATION left by the said Gavin Thomson and
George Watson at the Office of the Commissioners of Patents, with
their Petition, on the 26th August 1874.
We, GAVIN THOMSON and GEORGE WATSON, both of Deptford, in the
County of Kent, do hereby declare the nature of the said Invention
for IMPROVEMENTS IN THE MANUFACTURE OF COMPOUND INDIA-RUBBER SHEETS
OR SURFACES APPLICABLE TO VARIOUS USEFUL PURPOSES," to be as follows :--
This Invention has for its object the manufacture of compound sheets
of india-rubber, one side or surface of which is composed of india-rubber,
sulphur, lime, or other materials which admit of being converted by heat
into ebonite, or hard rubber, or vulcanized only, as is well understood in
the treatment of such compounds, the other side or surface of such
compound sheet being simply of india-rubber, or compounds of india-
rubber, or other materials which will not become hard when subjected

page_text: to heat in combination with the sheet or surface with which it is com-
bined. By this means compound sheets of india-rubber may be made
consisting of a hard ebonite or vulcanized surface on one side only, the
other side being left soft so as to be readily attached by suitable cement
to iron, wood, or other surfaces, such as the outside and inside of ships
or vessels, thus forming a water or air-tight coating, and thereby
preventing corrosion, crustaciæ, or "fouling." It may also be applied
to various other purposes where it is required to attach to or combine
cbonite and vulcanized rubber with other materials.
The above materials, for making a compound india-rubber sheet in
accordance with our Invention; are prepared in separate sheets, one
with and the other without sulphur, and then united by rollers or
otherwise; or the india-rubber alone may be applied to the compounded
sheet in the form of solution or otherwise, as may be required.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Gavin Thomson and George Watson in the Great
Scal Patent Office on the 26th February 1875.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, GAVIN
THOMSON and GEORGE WATSON, both of Deptford, in the County of
Kent, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twenty-sixth day of August, in the
year of our Lord One thousand eight hundred and seventy-four, in
the thirty-eighth year of Her reign, did, for Herself, Her heirs and
successors, give and grant unto us, the said Gavin Thomson and
George Watson, Her special license that I, the said Gavin Thomson
and George Watson, our exccutors, administrators, and assigns, or
such others as we, the said Gavin Thonson and George Watson,
our executors, administrators, and assigns, should at any time agree
with, and no others, from time to time and at all times thereafter
during the term therein expressed, should and lawfully might make,
use, exercise, and vend, within the United Kingdom of Great Britain
and Ireland, the Channel Islands, and Isle of Man, an Invention for
"IMPROVEMENTS IN THE MANUFACTURE OF COMPOUND INDIA-RUBBER SHEETS OR

page_text: (amongst others) that we, the said Gavin Thomson and George Watson,
our executors or administrators, by an instrument in writing under
our, or their hands or seals, under the hand and seal of one of us or
them, should particularly describe and ascertain the nature of the said
Invention, and in what manner the same was to be performed, and
cause the same to be filed in the Great Seal Patent Office within six
calendar months next and immediately after the date of the said Letters
Patent.
NOW KNOW YE, that I, the said Gavin Thomson, on behalf of myself
and the said George Watson, do hereby declare the nature of the said
Invention, and in what manner the same is to be performed, to be
particularly described and ascertained in and by the following statement
thereof, that is to say:
_
This Invention has for its object the manufacture of compound sheets
of india-rubber, one side or surface of which is composed of india-rubber,
sulphur, lime, or other materials, which admit of being converted by heat
into ebonite, or hard rubber, or vulcanized only, as is well understood in
the treatment of such compounds, the other side or surface of such
compound sheet being simply of india-rubber, or compounds of india-
rubber, or other materials which will not become hard when subjected
to heat in combination with the sheet or surface, such as above
described, with which it is combined. By this means compound sheets
of india-rubber may be made, consisting of a hard ebonite or vulcanized
surface on one side only, the other side being left soft so as to be readily
attached by suitable cement to iron, wood, or other surfaces, such as the
outside and inside of ships or vessels, thus forming a water or air-tight
coating, and thereby preventing corrosion, crustaciæ, or "fouling." It
may be applied to various other purposes where it is required to attach
to or combine ebonite and vulcanized rubber with other materials.
The above materials, for making. a compound india-rubber sheet in
accordance with our Invention, are prepared in separate sheets, one with
and the other without sulphur, and then united by rollers or otherwise,
and subjected to heat together, by which means a compound sheet is
produced in accordance with our improvements.
India-rubber alone or other materials may be applied to the com-
pounded sheet by means of solution or otherwise, as may be required

page_text: Compound india-rubber sheets or surfaces made as above described
may be applied in accordance with our Invention for covering the inside
or outside of ships or vessels to prevent rust, corrosion, or fouling; or
the same may be used for lining tanks, buckets, or vessels of wood or
iron; or for covering the walls of hospitals, urinals, or other places; for
lining to pipes or vessels for containing acids or other chemicals; and
for various other purposes to which the same may be applicable.
may be applied in accordance with our Invention for covering the inside
or outside of ships or vessels to prevent rust, corrosion, or fouling; or
the same may be used for lining tanks, buckets, or vessels of wood or
iron; or for covering the walls of hospitals, urinals, or other places; for
lining to pipes or vessels for containing acids or other chemicals; and
for various other purposes to which the same may be applicable.
Having thus described the nature of our improvements, and the
manner of performing or carrying the same into practice, what we claim
is,―
The improved manufacture of compound cbonite and other india-
rubber sheets or surfaces, such as herein-before described, and the
application thereof to the inner and outer surfaces of ships or vessels to
serve as a covering to protect and prevent rust and fouling, substantially
as herein-before described.
We also claim the application of compound ebonite and other india-
rubber sheets or surfaces of this, character to various useful purposes,
such as a cover or lining to tanks, buckets, or vessels of wood or iron,
for the walls of hospitals, urinals, and other places, to which the same
may be advantageously applied.
In witness whereof, I, the said Gavin Thomson, have hereunto
set my hand and seal, this Twenty-third day of February, in
the year of our Lord One thousand eight hundred and seventy-
fivc.
Witness,
J. G. TONGUE,
Patent Agent,
GAVIN THOMSON. (L.S.)
34, Southampton Buildings,
Chancery Lane,
London, W.C.