Into Solid Blocks.
Year: 1886

page_text: Date of Application, 29th Oct., 1886.
Complete Left, 15th July, 1887.
Complete Accepted, 23rd Aug., 1887.
Into Solid Blocks.
1 WILLIAM HENRY LINDSAY of 14 South Wharf Paddington Basin in the County
of Middlesex Engineer do hereby declare the nature of this invention to be as
follows:
-
This Invention has for its object improvements in apparatus for moulding coal dust
or small coal into solid blocks.
For this purpose I cause small coal or coal dust to be forced by means of a revolving
screw through a tube heated externally to a red heat. The coal as it passes from the
end of the tube I cause to be delivered either directly into moulds or into an open
hopper and thence into moulds as they are brought below it. The moulds as they are
filled I cause to be brought below the plunger of a hydraulic or other powerful press
and by this plunger I compress the material into the moulds with heavy pressure.
Moulded blocks formed from coal dust or small coal can be burnt in ordinary fire
grates just in the same way as lumps of coal whereas so called artificial fuel as
ordinarily made is quite unsuited for this purpose owing to the amount of tar or such
like matter admixed with the dust or small coal and which produces much smell when
burning.
Dated this 29th day of October 1886
CARPMAEL & Co.,
Agents for the Applicant.

page_text: COMPLETE SPECIFICATION.
Improvements in Apparatus for Moulding Coal Dust or Small Coal
into Solid Blocks.
1, WILLIAM HENRY LINDSAY of 14 South Wharf Paddington Basin in the County
of Middlesex Engineer do hereby declare the nature of this invention and in what
manner the same is to be performed to be particularly described and ascertained
in and by the following statement :-
This invention has for its object improvements in apparatus for moulding coal dust
or small coal into solid blocks and the improvements have reference to machinery for
heating the coal dust or small coal prior to its being compressed into solid blocks by
compressing machinery.
For this purpose I cause small coal or coal dust to be forced by means of a
revolving screw through a revolving tube heated externally to about a red heat.
Figure 1 of the drawings hereunto annexed is a longitudinal section and Figure 2
an end view of apparatus arranged in this manner.
W is a hopper from which coal dust or small coal is fed to one end of a revolving
cylinder X. This cylinder is mounted so that it can turn freely on an axis Y. The
cylinder X has fixed to it a chain wheel X¹ and the axis Y a chain wheel Y¹ so that
they may be revolved in opposite directions by endless chains working over them as
shewn at Figure 2.
The screw keeps the material from caking over the interior of the cylinder the
cylinder is somewhat inclined so that as it rotates the material travels gradually from
its higher to its lower end.
The exterior of the cylinder is kept constantly heated by a fire X² below it. The
material passed through the cylinder is discharged from its lower end in a heated
state through a shoot Z either directly into moulds or into a hopper from which it can
be fed into moulds.
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 :-
1. Apparatus constructed substantially as herein before described and illustrated
in the drawing annexed for heating coal dust or small coal prior to compressing it
into solid blocks.
2. The combination in apparatus for heating coal dust or small coal prior to
compressing it into solid blocks of the revolving cylinder inclining somewhat down-
wards and heated externally by a fire and the revolving screw within the cylinder
acting continuously as a scraper substantially as described.