Improvements in Furnaces.
Year: 1898

page_text: Date of Application, 5th Sept., 1898-Accepted, 19th Nov., 1898
Improvements in Furnaces.
We, JOHANN JOSEPH FRIES, Smith, and FRITZ GERHARD, Engineer, both of
St. Ingbert, Pfalz, Germany, 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:-
Our invention relates to improvements in furnaces whereby the smoke laden
gases noticed when fresh fuel is added are completely consumed. The object
of our invention is effected by dividing the space above and below the furnace
grate into two or more parts or chambers by a partition or wall or by partitions
or walls provision being made for closing each chamber as and when required.
The smoke produced in the chamber on one side of the partition when fresh fuel
is supplied to this chamber passes in thin streams into the other chamber through
openings provided in the partition wall, and in this second chamber is completely
consumed by passing over the glowing fuel and mixing with the heated gases
in the chamber. The channels for the passage of the smoke laden gases are
provided by setting bricks or tiles at a suitable distance apart in an opening
or in openings in the partition and these tiles or bricks are formed with channels
by which the air for consumption is supplied to the furnaces.
In the accompanying drawing our invention is shown as applied to the furnace
of a steam boiler and the furnace is assumed to be divided into two parts by an
intermediate partition wall. Figs. 12 and 3 are respectively a cross section,
longitudinal section, and plan. Figs. 4 and 5 being enlarged cross and vertical
sections showing the air-bricks and the channels between thein.
The partition wall CD longitudinally divides an ordinary furnace into two
similar chambers A and B each of the chambers having a slide or valve G or H
which is shown as horizontal in the drawings, but which may be otherwise
arranged. In the partition wall the opening l, m, n, o, is so filled with bricks
or tiles, that there remains between each tile and its fellow a small opening or
crevice s. The shape of the tiles or bricks is shown more in detail by Figs. 1
and 5. The air-supply channels R R¹ are set over corresponding openings pro-
vided in that part of the partition, which is immediately below them and the
openings in communicate with the air-inlets i provided in the partition and
below the grate. K is the boiler & E & F are the flues.
The working is as follows:-After the fuel in the chambers A and B has
reached a glowing state the chambers are alternately "fired," or supplied with
fuel. Thus if fuel is added to A, the slide H is closed and the slide Ġ is opened.
The smoke laden gases evolved in A pass in thin layers through the openings s
into the second chamber B, over the fuel therein (which is already in a glowing
state) and mix freely with the fresh and heated entering air, and with that already
heated. This mixture will by reason of the great heat in B be converted into a
powerful gas flame which adds to the heating capabilities of the furnace. When
the evolution of smoke laden gases has nearly ceased in A, the slide H is again
opened. In the meantime the fuel in B will have burned so low as to require
replenishing. The slide G is closed after the fuel has been added, and the same
series of operations is repeated from time to time.

page_text: If after the complete evolution of the gases in one of the two chambers A B
the fuel in the other of them has not been sufficiently consumed as to need a further
supply, the slide then closed is opened and the two chambers act as a single one
until the fresh supply of fuel is required.
As already implied the number of partition walls and consequently the number
of chambers may be more than two if so desired.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what our
claim is
Furnaces divided into two or more heating chambers by means of a partition
wall or partition walls in each of which are openings from one chamber to the
adjacent one, suitable bricks or tiles having air supplying channels being also
provided in the wall or walls, and provision being made by shutters or equivalents
whereby the chamber or chambers may be alternately or simultaneously opened
or closed, the whole substantially as described in the above specification and
exemplified in the accompanying drawings.
Dated the 30th day of August 1898.
HUGHES & YOUNG,
23, Coleman Street, Agents.