mprovements in the Method of Top Dressing for Wood Blocks for Streets, Footpaths, and the like.
Year: 1899

page_text: Date of Application, 16th May, 1899--Accepted, zoru dept.,
COMPLETE SPECIFICATION.
mprovements in the Method of Top Dressing for Wood Blocks for
Streets, Footpaths, and the like.
I, HUGH DUNLOP, of 43, Sloane Street, Summer Hill, in the Colony of New
uth Wales, Gentleman, do hereby declare the nature of this invention and in
at manner the same is to be performed, to be particularly described and ascer-
ned in and by the following statement:
1
The object of this invention is a more effective means of covering street blocks,
otpaths and the like, while at the same time being a preservative to the wood
sed, and is thus claimed to be far superior to anything yet used or tried for the
me purposes.
This method of top dressing wood blocks is a composition made with the
ollowing substances and liquids:-Bitumen, basalt or other igneous rock screen-
ngs, cement, caustic soda, resin, calcined clay, sand, boiled linseed oil, and Stock-
olm tar. I form or mix these ingredients into two mixtures or divisions which
I call the first and second mixture.
To make the first mixture, I take the ingredients named, in the following pro-
portions: To two hundredweight of basalt or other igneous rock screenings,
add one hundredweight Portland cement, one half (cwt.) hundredweight caustic
soda, three hundredweight resin, and two hundredweight calcined clay. To mix
these together the resin and caustic soda are boiled in water and when cooled
is mixed with the Portland cement, calcined clay and basalt or other igneous
rock screenings.
To make the second mixture I take the ingredients named, in the following
proportions: To two hundredweight of bitumen (placed in a boiler or vat) add
one hundredweight of resin, two and one half (2) gallons boiled linseed oil, and
When these are boiled to a thoroughly liquid
twelve gallons of Stockholm tar.
state, add two hundredweight calcined clay, two hundredweight of basalt or
other igneous rock screenings and any quantity of sand that may be deemed
necessary.
To apply the composition take the mixture number one and lay it on (by any
approved means) the substances desired to be covered or treated, and allow same
0 to remain about six hours to solidify, in order to form a preservative for the
blocks, and also to act as a gripper to the mixture number two.
After mixture number one is solidified, apply mixture number two by pouring
it over the first mixture (already set) in a hot liquid state (by any approved means)
after this mixture has been laid on and sufficient time allowed for it to cool, a
35 roller is then gone over it till it becomes an even surface, and then it is covered
with sand and again the roller is gone over it, as often as may be required, and in
four to six days this improved method of covering wood blocks will be perfectly
solid, and will allow of the heaviest traffic passing over it, without in any way
destroying or damaging it.
40
The thickness of this composition when set on wood blocks is from half an inc
according to the requirements of the place, so that besides bein

page_text: very efficacious, it will be found also to be a very economical method of top
dressing.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I desire to state I do
not in any way claim the use of wood blocks in the formation of roadways and
footpaths, but what I claim is: -
First: In the construction of roadways, footpaths and the like formations for
vehicular and other traffic, the combination of wood. blocks with a mixture of
ingredients composed of bitumen, resin, caustic soda, Portland cement, calcined
clay, boiled linseed oil, Stockholm tar, basalt or other igneous rock screenings,
and sand prepared and mixed in a manner as hereinbefore described.
Second: In the construction of roadways, footpaths and the like formations
for vehicular and other traffic, the combination of wood blocks with a mixture of
ingredients herein described and in the proportions as hereinbefore described and
set forth.
1000
WM. P. THOMPSON & Co.,
Of 6, Lord Street, Liverpool, Agents for the Applicant.