A New or Improved Draught Regulator for Furnaces.
Year: 1895

page_text: Date of Application, 5th July, 1895
Complete Specification Left, 2nd Apr., 1896-Accepted, 16th May, 1896
PROVISIONAL SPECIFICATION.
A New or Improved Draught Regulator for Furnaces.
We, NOËL MARC, and EUGENE SCHERDING both of 15 Rue du Louvre Paris
in the Republic of France, Manufacturers do hereby declare the nature of this
invention to be as follows:
--
This invention relates to a new draught regulator for furnaces of large
dimensions and is especially adapted for steam generating surfaces.
According to our invention the draught is uniformly regulated by an apparatus
placed in front of the fire bed under which latter it distributes the air in a uniform
and rational manner thus preventing or suppressing all irregularities in the action
of combustion.
Our invention admits of purifying the air baving access to the combustion
chamber by means of a sifter worked in contact with substances adapted to com-
pletely or partially remove all elements that would be injurous to the combustion
or to enrich the same by use of the sifter in contact with substances adapted to
increase the proportion of oxygen which is contained therein.
Finally our invetition admits of heating the entering air in a more intimate
manner by forcing the same to subdivide itself very intimately and to thus traverse
the apparatus which is kept at an elevated temperature by the heat emanating from
the fire grate.
The invention is performed by placing underneath the grate of the furnace our
regulating apparatus, in the form of a carriage with wheels, having two plates
fixed on longitudinally to the two sides of the frame thereby preventing the air
from having access sideways to the grate without having passed the regulator.
Plates in a reversed V form are secured with their free extremities on to the
plates transversely to the apparatus, and bridges formed, between which are placed
boxes, the latter being mounted on the traverses. Said boxes have a bottom and
a movable partition wall consisting of a wire gauze of perforated sheet iron or any
other suitable material and adapted to allow of the passage of air upwards. They
are provided at their longitudinal sides with horizontal arms. On to the latter are
hinged trap doors which are kept in a horizontal position by means of counter-
weights resting with their extremities opposite to the hinges against the arms. The
doors are of the same length as the plates under which they are placed and thus
protected from the slags that will fall through the grate. These slags drop on
the plates and from there on the bridges which after a sufficient accumulation
give way under the weight and opening themselves pour the slags into the ash-
box. Plates, project from the centre supporting the traverses that rest with their
extremities on the frame. These said plates are keyed on to the shaft which
latter also carries a screw shaped toothed pinion that engages while rotating with
an endless screw said rotation being manipulated by a crank attached to the
end of the endless screw shaft and being within arms reach of the fireman.
The boxes receive at their bottom pounded limestone, and on their partition wall
baryta or any other bodies, materials or products that are appropriate or suitable
for the result aimed at.
Dated this 5th day of Tul 1905
HERBERT HADDAN & Co.,"
Agents to Applicants.

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We NOËL MARC and EUGENE SCHERDING both of 15, Rue du Louvre, Paris,
in the Republic of France, Manufacturers, 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 relates to a new draught regulator for furnaces, of large
dimensions and is especially adapted for steam generating furnaces.
According to our invention the draught is uniformly, regulated by an apparatus
placed, in front of the fire bed under which latter it distributes the air in a uniform
and rational manner, thus preventing or suppressing all irregularities in the action
of combustion.
Our invention admits of purifying the air having access to the combustion
chamber by means of a sifter worked in contact with substances adapted to com-
pletely or partially remove all elements that would be injurious to the combustion
or to enrich the same by use of the sifter in contact with substances adapted to
increase the proportion of oxygen which is contained therein.
Finally our invention admits of heating the entering air in a more intimate
manner by forcing the same to subdivide itself very intimately and to thus
traverse the apparatus which is kept at an elevated temperature by the heat
emanating from the fire grate.
The drawings annexed hereto represent our invention in its entirety and in
detail.
Fig. 1 shows such an apparatus in elevation and partial vertical section. Fig. 2
shows a rear view. Fig. 3 a plan view thereof.
Fig. 4 is a vertical section on a larger scale representing the arrangement of
plates of reversed V shape, of sifters and traps.
:
The invention is performed by placing underneath the grate Z of the furnace
our regulating apparatus in the form of a carriage a with wheels 6 having two
plates c fixed on longitudinally to the two sides of the frame, thereby preventing
the air from having access sideways to the grate without having passed the
regulator plates d of a reversed V form are secured with their free extremities on
to the plates c transversely to the apparatus: e are trap doors between which are
placed boxes i, the latter being mounted on the traverses e'. Said boxes have a
bottom and a movable partition wall a' consisting of a wire gauze of perforated
.sheet iron or any other suitable material and adapted to allow of the passage of
air upwards. They are provided at their longitudinal sides with horizontal arms
and On to the latter are hinged trap doors e which are kept in a horizontal
position by means of counterweights j resting with their extremities opposite to the
hinges, against the arms ¹. The doors e are of the same length as the plates a
under which they are placed and the boxes are thus protected from the slags that
will fall through the grate. These slags drop on the plates d and from there on
the traps e which after a sufficient accumulation give way under the weight and
opening pour the slag and ashes out into the ash box: plates f project from the
centre supporting the traverses el that rest with their extremities on the frame.
These eccentric plates fare keyed on to the shaft f' which latter also carries a worm
wheel that engages with an endless screw g the rotation being given to the latter
by a crank attached to the end of the endless screw shaft g within arms reach of
the fireman. The boxes i receive on their bottom a pounded limestone, and on
their partition wall a baryta or any other bodies, materials or products that are
appropriate or suitable for the result aimed at.
The mode of operation is as follows:-
The apparatus having been placed underneath the grate the air arrested by the

page_text: trap doors e and the boards and passes through the bottoms of the boxes i
through the limestone and the baryta, and enters the chamber formed between the
apparatus and the grate in a heated state and deprived of its carbonic acid
through the action of the limestone and with a larger store of oxygen imparted
by the hot baryta. In order to regulate the draught it is only required to raise or
lower the boxes i which is accomplished by means of the screw g the pinion k and
the eccentric plates for by means of any other regulating combination.
It is manifest that our apparatus may be employed in connection with a closed
ash box and consequently with previously heated air. It is also evident that we
only give an exemplification of the idea of our construction, to which we would.
not confine ourselves, consequently we reserve the right to vary the form of
construction in its entirety as well as in its details according as practice
suggests.
Having now particularly described and ascertained the nature of this inven-.
tion and in what manner the same is to be performed we declare that what we
claim is:
1. A draught regulating apparatus consisting of movable boxes i perforated at
their bottoms in combination with plates d of reversed ✓ shape, trap doors e
capable of being opened under the action of the weight of slag and ash and of
closing again automatically; the said boxes i being adapted to receive limestone,
baryta, or other materials for the purpose of subdividing, purifying, and enriching.
the air.
2. In draught regulating apparatus, boxes i with perforated bottoms for the
purpose set forth.
HERBERT HADDAN & Co.,
18, Buckingham Street, Strand, London, W.C.,
Agents for Applicants.