A NEW OR IMPROVED MATERIAL OR COMPOUND OF CAOUTCHOUG WITH OTHER SUBSTANCES
Year: 1875

page_text: LETTERS PATENT to George Mac Lellan, of Glasgow, in the County
ઃઃ
of Lanark, North Britain, India-rubber Manufacturer, for the Inven-
tion of "A NEW OR IMPROVED MATERIAL OR COMPOUND OF CAOUTCHOUG
WITH OTHER SUBSTANCES.”
ealed the 20th December 1875, and dated the 15th October 1875.
PROVISIONAL SPECIFICATION left by the said George Mac Lellan at
the Office of the Commissioners of Patents, with his Petition, on
the 15th October 1875.
I, GEORGE MAC LELLAN, of Glasgow, in the County of Lanark, North
Britain, India-rubber Manufacturer, do hereby declare the nature of
the said Invention of "A NEW OR IMPROVED MATERIAL OR COMPOUND OF
CAOUTCHOUC WITH OTHER SUBSTANCES," to be as follows, that is to say :-
This Invention relates to the manufacture of a new or improved
compound of caoutchouc with other substances, and it has for its object
the production of a material which is heavier, more elastic, and less
brittle than vulcanite, and it may be used in or for the construction of a
great variety of articles, such as bowls or balls, blocks to be used in

page_text: substitution for the stones at present employed in the game of " curling,"
valves for pumps, and generally for purposes wherein a dense and elastic
mass is required.
The Invention may be carried into effect in two ways, first by tri-
turating or disintegrating the refuse or waste of india-rubber cloth
manufacture, the result of which is the production of a loose mass of
india-rubber with the fibres of textile material combined therewith.
With this mass, if there is not sufficient sulphur therein, the requisite
quantity of sulphur and colouring matter is added to produce the desired
degree of hardness and colour required in the subsequent process of
vulcanization. The mass with the substances commingled therewith is
next placed in a mould or moulds, or other receptacles, and then sub-
mitted to the process of vulcanization.
In place of employing the waste or refuse of india-rubber cloth manu-
facture as herein-before described, a quantity of rags or textile fibres
may be commingled with raw india-rubber, together with colouring
matter and sulphur, after which it is vulcanized in the ordinary manner.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said George Mac Lellan in the Great Seal Patent Office
on the 15th April 1876.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, GEORGE
MAC LELLAN, of Glasgow, in the County of Lanark, North Britian,
India-rubber Manufacturer, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Fifteenth day of October, in the year
of our Lord One thousand eight hundred and seventy-five, in the
39th year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto me, the said George Mac Lellan, Her special
license that I, the said George Mac Lellan, my executors, administrators,
and assigns, or such others as I, the said George Mac Lellan, my exe-
cutors, administrators, or 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

page_text: Channel Islands, and Isle of Man, an Invention for "A NEW OR IMPROVED
MATERIAL OR COMPOUND OF CAOUTCHOUC WITH OTHER SUBSTANCES," upon the
condition (amongst others) that I, the said George Mac Lellan, by an
instrument in writing under my hand and seal, 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 George Mac Lellan, do hereby declare
the nature of my said Invention, and in what manner the same is to
be performed, to be particularly described and ascertained in and by
the following statement, that is to say:―
My said Invention relates to the manufacture of a new or improved
compound of caoutchouc with other substances, and it has for its object
the production of a material which is called "tenacious vulcanite," this
being heavier and less brittle than ordinary vulcanite, and it may be
used in or for the construction of a great variety of articles, such as
bowls or balls, blocks to be used in substitution for the stones at present
employed in the game of "curling," valves for pumps, piping, taps, and
cocks, especially adapted for the conveyance or discharge of acid or acid
liquor, and generally for purposes wherein a dense and tough mass is
required.
The Invention may be carried into effect in two ways, first, by tri-
turating or disintegrating the refuse or waste of india-rubber cloth
manufacture, or old india-rubber cloth, the result of which is the pro-
duction of a loose mass of india-rubber or caoutchouc with the fibres of
textile material mixed or combined therewith. With this mass, if there
is not sufficient sulphur therein, a further quantity of sulphur is added
to produce the desired degree of hardness by the subsequent process of
vulcanization. Colouring matter, such as it is usual to employ for
colouring india-rubber, may also be added when required, the substances
being commingled in an ordinary mixer. The mass, with the substances
commingled therewith, is next placed in a mould or moulds or other re-
ceptacles, and then submitted to the ordinary process of vulcanization,
excepting that it is submitted to that process for a longer period than is
usual in the manufacture of ordinary vulcanite, the presence of textile
fibres with the caoutchouc enabling the mass to submit to a high tempe-

page_text: rature for a longer period without its quality of tenacity being destroyed
than is the case with ordinary vulcanite.
In place of employing the waste or refuse of india-rubber cloth manu-
facture as herein-before described, a quantity of rags or textile fibres,
may be commingled with raw india-rubber or caoutchouc, together with
colouring matter and sulphur, after which it is vulcanized as herein-
before described with reference to the manufacture of "" tenacious
vulcanite" from waste or old india-rubber cloth.
Having now described and particularly ascertained the nature of my
said Invention, and the system, mode, or manner in or under which the
same is or may be used or practically carried into effect, I would obscrve
in conclusion that what I consider to be novel and original, and there-
fore claim as the Invention secured to me by the herein-before in part
recited Letters Patent is, the new or improved material herein-before
described, consisting of a vulcanized compound of india-rubber or
caoutchouc and textile fibres with sulphur, and with or without colouring
matter mixed therewith.
In witness whereof, I, the said George Mac Lellan, have here-
unto set my hand and seal, this Thirteenth day of April, One
thousand eight hundred and seventy-six.
GEORGE MAC LELLAN. (L.S.)