AN IMPROVED MATERIAL TO BE USED IN MAKING ROADS, RAILWAY SLEEPERS AND FOR OTHER PURPOSES
Year: 1884

page_text: CONRAD FREDERICK STOLLMEYER of 6 Bream's Buildings, Chancery Lane in
the County of Middlesex, Merchant, do hereby declare the nature of my invention
for AN IMPROVED MATERIAL TO BE USED IN MAKING ROADS, RAILWAY SLEEPERS
AND FOR OTHER PURPOSES, to be as follows:-
The object of this invention is to produce in an economical manner, a material
to be used chiefly in making roads, but which is also applicable for other purposes,
such as for making railway sleepers and for making floors and the invention
consists in the combination of asphalt and sawdust in varying proportions.
It is well known that asphalt is of too brittle a nature to be used alone for road
work and with a view to obtain toughness, the asphalt has been mixed with fibre,
gravel, sand, stone chips and similar materials but these have not had the desired
effect.
From experiments I have made I find that saw dust is a material which when
mixed with the asphalt, gives a considerably greater amount of toughness than
any of those above named, while from the fact that it is almost a drug in tho
market, the cost is comparatively alight.
In carrying out my invention I take any convenient quantity of asphalt, by
preference Trinidad asphalt, or asphalt of a similar character and submit it to the
action of heat in a suitable vessel until it is completely disintegrated. I then mix
therewith, as much sawdust as it will take up, which in general will be about
50 per cent.
When this material is to bo used for paving roads or footways, I first lay a bed
of concrete in the usual manner and I apply the material, which will be in a hot
and pulverulent condition, evenly over the surface of the concrete, to the depth of
from, an inch to 2 inches, in any convenient manner and roll it or beat it down
with leated beaters or I may compress it into blocks of any convenient size and
use it in the same manner as blocks of wood, running liquid asphalt into the
interstices between the blocks.
When the material is to be used for making railway sleepers, the requisito
quantity of the hot material to make a sleeper of a certain size, is placed in a
mould of the required length and width, and whilst still hot, is subjected to
pressure by means of a roller or in any other convenient manner, which will
compress it to the required depth.
This improved material has much of the toughness of wood without the
brittleness of the pure asphalt, as the saw dust, while diluting the asphalt, seems
to give it cohesion.
NEWTON & SON,
Agents for the Applicant.

page_text: I, CONRAD FREDERICK STOLLMEYER of 6, Bream's Buildings, Chancery Lane,
in the County of Middlesex, Merchant, do hereby declare the nature of my
invention for AN IMPROVED MATERIAL TO BE USED IN MAKING ROADS, RAILWAY
SLEEPERS, AND FOR OTHER PURPOSES, and in what manner the same is to be
performed, to be particularly described and ascertained in and by the following
statement:
The object of this invention is to produce, in an economical manner, a material
to be used chiefly in making roads, but which is also applicable for other purposes,
such as for making railway sleepers and for making floors, and the invention
consists in the combination of asphalt and sawdust in varying proportions.
It is well known that asphalt is of too brittle a nature to be used alone for road
work, and with a view to obtain toughness, the asphalt has been mixed with fibre,
gravel, sand, stone chips, and similar materials but these have not had the desired
effect.
From experiments I have made, I find that sawdust is a material which, when
mixed with the asphalt, gives a considerably greater amount of toughness than
any of those above named, while from the fact that it is almost a drug in the
market, the cost is comparatively slight.
In carrying out my invention, I take any convenient quantity of asphalt, by
preferenco Trinidad asphalt, or asphalt of a similar character, and submit it to the
action of heat in a suitable vessel until it is completely disintegrated. I then
mix therewith as much sawdust as it will take up, which in general will be about
50 per cent.
When this material is to be used for paving roads or footways, I first lay a bed
of concrete in the usual manner, and I apply the material, which will be in a hot
and pulverulent condition, evenly over the surface of the concrete to the depth of
from an inch to 2 inches, in any convenient manner, and roll it or beat it down
with heated beaters, or I may compress it into blocks of any convenient size, and
use in it the same manner as blocks, of wood, running liquid asphalt into the
interstices between the blocks.
When the material is to be used for making railway sleepers, the requisite
quantity of the hot material to make a sleeper of a certain size, is placed in a
mould of the required length and width, and whilst still hot, is subjected to
pressure by means of a roller, or in any other convenient manner, which will
compress it to the required depth.
This improved material has much of the toughness of wood without the
brittleness of the pure asphalt, as the sawdust, while diluting the asphalt, seems to
give it cohesion.
It has also the effect of giving a certain amount of elasticity which enables it
to resist shocks and for this reason I propose to employ this new material to
protect the hulls of vessels from shot. The asphalt prepared as above described
would be filled or cast in between thin sheet iron plates on the sides of the vessels

page_text: and would be a better protection than iron plates of the same thickness as the
elasticity in the material, which is absent in iron, would prevent the passage of
shot through it.
Having now particularly described and ascertained the nature of my said
Invention and in what manner the same is to be performed, I declare that what
I claim is
As an improved material for making roads, railway sleepers and for other
purposes, asphalt and sawdust in combination in or about the proportions given.
NEWTON & SON,
Agents for the Applicant.