IMPROVEMENTS IN ASPHALTED PAVEMENTS TO PREVENT THEIR SURFACE FROM BECOMING SLIPPERY
Year: 1873

page_text: LETTERS PATENT to Edward William Bonham, of No. 36, Lansdowne
Road, Notting Hill, in the County of Middlesex, for the Invention
of "IMPROVEMENTS IN ASPHALTED PAVEMENTS TO PREVENT THEIR SURFACE
FROM BECOMING SLIPPERY."
PROVISIONAL SPECIFICATION left by the said Edward William
Bonham at the Office of the Commissioners of Patents, with his
Petition, on the 13th December 1873.
I, EDWARD WILLIAM BONHAM, of No. 36, Lansdowne Road, Notting
Hill, in the County of Middlesex, do hereby declare the nature of the
said Invention for "IMPROVEMENTS IN ASPHALTED PAVEMENTS TO PREVENT
THEIR SURFACE FROM BECOMING SLIPPERY," to be as follows:-
The object of this Invention is to prevent the surface of asphalted
pavements from becoming slippery as they now frequently do in foggy
or damp weather. For this purpose after a coating of asphalte has been
laid upon a roadway in the ordinary manner I coat its surface with tar,

page_text: and over this throw a quantity of sawdust and beat or roll the sawdust
into the tarred surface of the asphalte, the asphalte being by preference
still in a heated state.
If the asphalte has been laid down in a liquid state the surface of the
asphalte may be subsequently covered with a coating of pitch, and saw-
аттма опа ЛАТТ
still in a heated state.
по сорпатися по сорпа б
If the asphalte has been laid down in a liquid state the surface of the
asphalte may be subsequently covered with a coating of pitch, and saw-
If the asphalte has been laid down in a liquid state the surface of the
asphalto may be subsequently covered with a coating of pitch, and saw-
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Edward William Bonham in the Great Seal Patent 1
Office on the 12th June 1874.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, EDWARD
WILLIAM BONHAM, of No. 36, Lansdowne Road, Notting Hill, in the
County of Middlesex, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her :
Letters Patent, bearing date the Thirteenth day of December, in the year
of our Lord One thousand eight hundred and seventy-three, in the thirty-
seventh year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto me, the said Edward William Bonham, Her special
license that I, the said Edward William Bonham, executors, admin-
istrators, and assigns, or such others as I, the said Edward William
Bonham, executors, administrators, and assigns, should at any time
agree with, and no others, from time to time and at all times there-
after 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 ASPHALTED PAVEMENTS TO PREVENT THEIR
SURFACE FROM BECOMING SLIPPERY," upon the condition (amongst others)
that I, the said Edward William Bonham, executors or admin-
istrators, by an instrument in writing under my, or their, or one of
their hands and seals, 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

page_text: Office within six calendar months next and immediately after the 'date
of the said Letters Patent.
NOW KNOW YE, that I, the said Edward William Bonham, 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 :-
The object of this Invention is to prevent the surface of asphalted
pavements from becoming slippery as they now frequently do in foggy
or damp weather. For this purpose after a layer of asphalte has been
laid upon a roadway in the ordinary manner I coat its surface with tar,
and over this throw a quantity of saw dust, and beat or roll the sawdust
into the tarred surface of the asphalte, the asphalte being by preference
still in a heated state.
If the asphalte has been laid down in a liquid state the surface of the
asphalte may be subsequently covered with a coating of pitch, and saw-
dust be worked in with it in a similar manner.
The surface covering of tar or pitch and sawdust may be renewed
whenever required.
Having thus stated the nature of my Invention I will proceed to
describe more in detail the manner in which I prefer to operate.
The asphalte having been laid in any usual manner I at once, and if
heated, whilst it is still hot, sprinkle the surface with petroleum, so as
thoroughly to moisten it. The petroleum should not be of too volatile a
nature, such as is commonly burnt in lamps is suitable. I then paint
over the surface with coal tar moderately heated, and I at once sift over
it fine wood sawdust or analogous substance. The pavement is
thoroughly rolled or beaten, and after about 24 hours the road is ready
for traffic. The surplus sawdust may be lightly swept off.
Should it become requisite to renew the surface the road or way
should be thoroughly cleansed and dried, it is then moistened with
petroleum, painted over with tar, covered with sawdust, and rolled or
beaten, as already described.
If the pavement be of a comparatively soft nature, it will usually be
so when it has been laid in a melted state, I use melted pitch in place of
tar.

page_text: Having thus described the nature of my said Invention and the
manner of performing the same I would have it understood that I claim
the means, substantially as described, for treating and improving
asphalte pavements and preventing the surface becoming slippery.
In witness whereof, I, the said Edward William Bonham, have 5
hereunto set my hand and seal, this Twelfth day of June, in
the year of our Lord One thousand eight hundred and seventy-
four.
EDWARD WILLIAM BONHAM. (L.S.)