Year: 1887

page_text: Date of Application, 25th Apr., 1887.
Specification Accepted, 22nd July, 1887.
I, REGINALD HADDAN, of the firm of Herbert & Co., Patent Agents, of 67 Strand,
London, in the County of Middlesex, Civil 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:-
The object of this invention is to construct the surroundings or walls of steam
generators or any other heaters of furnaces with hollow bricks or blocks the
cavities of which correspond to each other so as to form conduits or pipes which
terminate in a chamber, the hot air thus accumulated being utilized for various
purposes.
Referring to the annexed drawing: Fig. 1 is an elevation. Fig. 2 a cross section.
Fig. 3 a plan of a steam generator, surrounded after the improved method. Fig. 5
to 8 show various details of the blocks etc.
A are rectangular blocks for forming upright walls, the vaults being composed also
of hollow blocks. B.C are the perforations in the blocks, forming when the blocks
are built together longitudinal tubes, leading to the chamber R whence the heated air
can be drawn off through pipes T according to requirement. These longitudinal
tubes C are open at the front or other outer wall of the furnace and suck in cold air,
which is heated when passing through the hollow bricks. Fig. 5 represents a coupling
muff or cylinder which may be inserted between each two blocks into the recesses t
left for that purpose.

page_text: The hot air may be employed for better combustion of the fuel. For this purpose
pipes K are arranged, which conduct the heated air from the chamber R to the space
under the fire bars, ash-box being closed by a door P.
The pipe K may be closed at W or elsewhere by sliding doors or registers.
For allowing hot air to be drawn when the furnace is not in full combu-tion or after
the fire has been extinguished, the conduit H may be arranged with a closing register
to conduct the air direct to the chamber R. over the embers of the fire so that the
said air may be heated by the embers and by the surrounding boiler and walls which
would still retain a considerable quantity of heat.
As shown by Figs 8 and 8° in perspective and cross section the tubes C may be
provided with branches in communication with the grating for facilitating the
combustion of coal.
The hot-air pipes may be closed in front of the furnace by one or more doors or
other suitable means. They may also unite in one outwardly extending pipe for
avoiding the surrounding dust.
The hot-air conduits may be placed vertically or inclined. If they are vertical, a
horizontal pipe unites them at the ends. The may also be united by the pipes .
connected two main pipes.
The pipes in the masonry may also be applied in any other suitable manner and to
other furnaces than that represented.
Having now particularly described and ascertained the nature of said invention,
and in what manner the same is to be performed, I declare that what I claim is :-
:-
1. The construction of furnace walls of blocks having perforations so placed, as to
form continuous pipes or conduits through which air may pass substantially as set
forth.
2. The combination with the walls constructed with conduits C, of the chamber R
with which said conduits communicate substantially as and for the purpose set
forth.
3. The combination with the walls constructed with conduits C; of a chamber R
and pipe K substantially as and for the purpose set forth.
D
REGINALD HADDAN.
By Herbert & Co.,
67, Strand, W.C.,
Agents to Applicant.