IMPROVEMENTS IN THE MANUFACTURE OF VAL DE TRAVERS ROCK PAVEMENT
Year: 1872

page_text: LETTERS PATENT to John Fottrell, of No. 2, Idrone Terrace, Black-
rock, County of Dublin, Manager of a Public Company, for the
Invention of “IMPROVEMENTS IN THE MANUFACTURE OF VAL DE TRAVERS
ROCK PAVEMENT."
Sealed the 28th March 1873, and dated the 30th September 1872.
PROVISIONAL SPECIFICATION left by the said John Fottrell at the
Office of the Commissioners of Patents, with his Petition, on the
30th September 1872.
I, JOHN FOTTRELL, of No. 2, Idrone Terrace, Blackrock, County of
Dublin, Manager of a Public Company, do hereby declare the nature
of my said Invention for "IMPROVEMENTS IN THE MANUFACTURE OF VAL DE
TRAVERS ROCK PAVEMENT," to be as follows:-
This Invention relates principally to an improved manufacture of Val
de Travers bituminous rock pavement, and consists in mixing ground
stone or stone in a fine state of division with the Val de Travers rock.

page_text: I find that about (3 parts) of finely ground stone mixed with about one
part of Val de Travers rock, also finely ground, gives a good result, a
considerable saving being effected in the cost of pavement without in
any way impairing its durability.
In the production of certain pavements in addition to the employment
of the Val de Travers bituminous rock and ground stone other natural
bituminous substances may be employed together with bituminous shale,
and the whole being in a fine state of division may be subjected to heat
in the usual manner in order to obtain the desired result, viz., an
economical pavement.
SPECIFICATION in pursuance of the conditions of the Letters Patent
filed by the said John Fottrell in the Great Seal Patent Office on
the 28th March 1873.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOHN
FOTTRELL, of No. 2, Idrone Terrace, Blackrock, County of Dublin,
Manager of a Public Company, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Thirtieth day of September, in the year
of our Lord One thousand eight hundred and seventy-two, in the 36th
year of Her reign, did, for Herself, Her heirs and successors, give and
grant unto me, the said John Fottrell, Her special license that I, the
said John Fottrell, my executors, administrators, and assigns, or such
others as I, the said John Fottrell, my executors, 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 Channel Islands, and
Isle of Man, an Invention for "IMPROVEMENTS IN THE MANUFACTURE OF
VAL DE TRAVERS ROCK PAVEMENT," upon the condition (amongst others)
that I, the said John Fottrell, my executors or administrators, 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

page_text: 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 John Fottrell, do hereby declare
the nature of my said Invention, and in what manner the same is to be
5 performed, to be particularly described and ascertained in and by the
following statement, that is to say:
My said Invention relates principally to an improved manufacture of
Val de Travers bituminous rock pavement, and consists in mixing ground
stone or stone in a fine state of division with the Val de Travers rock.
I find that about one ton of finely ground Val de Travers rock to from
seventy to ninety per cent. of stone, also finely ground, gives a good
result. By mixing ground stone instead of whole grit in the form of
pebbles with the Val de Travers rock the powder becomes saturated, and
all the bitumen contained in the rock is made available, the advantage
of which is lost when grit is administered as at present in a whole state,
therefore a much larger per centage of stone can be used, and a con-
siderable economy is effected in the proportion of the bituminous material
so employed.
°
In the production of certain pavements in addition to the employment
of the Val de Travers bituminous rock and ground stone other natural
bituminous substances may be employed together with bituminous shale,
and the whole being in a fine state of division may be subjected to heat
in the usual manner in order to obtain the desired result, videlicet, an
economical pavement.
Having now described and particularly ascertained the nature of my
said Invention, and the manner in which the same is or may be used or
carried into effect, I would observe in conclusion that what I consider
to be novel and original and therefore claim as the Invention secured
to me by the herein-before in part recited Letters Patent is,-
First. The mixing of ground stone or stone in a fine state of division
with Val de Travers rock in the proportion of about one ton of Val de
Travers rock to from seventy to ninety per cent. of powdered stone,
according to the bituminous richness of the natural rock, the application
of such mixture to the making of bituminous rock pavement, substantially
as hercin-before described.

page_text: Second. The combination or admixture with the above of natural
bituminous matter, substantially as and for the purpose herein-before
stated.
In witness whereof, I, the said John Fottrell, have to this my
Specification set my hand and seal, the Twenty-fifth day of 5
March, One thousand eight hundred and seventy-three.