Improvements in Ventilating Stoves.
Year: 1892

page_text: Date of Application, 11th Oct., 1892
Complete Specification Left, 8th July, 1893-Accepted, 12th Aug., 1893
PROVISIONAL SPECIFICATION.
Improvements in Ventilating Stoves.
1, HENRI JOSEPH PIRON, of 5, Chaussée de Gand, Molenbeck-lez-Bruxelles,
in the Kingdom of Belgium, Engineer, do hereby declare the nature of this inven-
tion to be as follows:-
This invention relates to improvements in ventilating stoves chiefly adapted for
burning coke but also applicable for burning other kinds of fuel.
My improved stove comprises a base, a body consisting of three walls or jackets
and a cover provided with radial ribs and a charging door.
The base is formed of two parts, the pure air entering the lower part from the
exterior or interior of the room or chamber to be heated and passing through
openings and inlet pipes into the three walled body of the stove.
This body comprises (1) an inner jacket of corrugated sheet or cast iron (2) a
middle jacket of cast iron made with ribs or projections and (3) a sheet or cast iron
outer jacket.
Pure air arriving as above described passes through the inlet pipes rises between
the outer and middle jackets and spreads into the chamber through the top of the
stove, licking the ribs of the cover which are partly enclosed by a cap fixed on the
outer or third jacket. The air necessary for the combustion is taken from the room
or chamber to be heated and rises between the corrugated jacket and the iron
jacket to the top of the stove passing over the surface of the ignited fuel.
It will thus be understood that this highly heated air serves to effect an almost
perfect combustion.
The feeding of the fuel is effected through a feeding door a door being also
provided for the cleaning.
The quantity of air necessary for the combustion can be regulated by a damper
in the chimney or by a rotating plate closing the openings of the passages between
the inner and middle jackets.
Where good ventilation is not necessary the inlet pipes may be dispensed with as
well as the outer jacket, the cap allowing the ribs or projections to radiate the heat
freely into the chamber.
Dated this 7th day of October 1892.
4 2.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements, in Ventilating Stoves.
1, HENRI JOSEPH PIRON of Brussels, in the Kingdom of Belgium do hereby
declare the nature of this invention and in what mauner the same is to be
performed to be particularly described and ascertained in and by the following
statement:
In slow combustion stoves (the so called tortoise stoves &c.) only a comparatively
small quantity of air is allowed to enter the combustion chamber and consequently
the removal of the vitiated air from the room can only take place very slowly and
incompletely.
The improved stove according to the present invention is constructed to effect a
strong exhaust of the vitiated air which is replaced by pure air from the exterior

page_text: besides drawing in the small quantity of air required for slow combustion while at
the same time the vitiated exhaust air is highly heated and serves to complete the
combustion at the outlet of the gases.
This result is obtained by simply constructing the stove with three walls forming
two separated passages or conduits and communicating one with the room and
ending above the hearth near the outlet of the combustion gases-and the other
with the open air and opening into the room just above the cover of the stove.
In the accompanying drawings
Fig. 1 is a vertical section of the improved stove.
Fig. 2 is an elevation partly in section.
Figs, 3, 4, 5, are transverse sections and .a. plan and
Fig. 6 shows in vertical section, Fig. 7 in clevation and Figs. 8 & 9 in transverse
section the application of my improved system to a domnestic stove.
The arrangement is shown in a general way in Fig. 1 in which 1 indicates the
combustion chamber charged with fuel. 2 is the conduit or passage nearest or
immediately surrounding the combustion chamber communicating with and
drawing the air from the room through openings e in the foot or base of the
stove and ending at g at the upper part of the combustion chamber. 3 is the outer
conduit or passage communicating through with the exterior and through with
the room.
The arrow a represents the course of the small quantity of air necessary for the
slow combustion which enters the stove in the usual way through a door, valve, or
other suitable device. c represents the course of the large volumes of vitiated air
passing through the conduit 2 in which it becomes highly heated and after leaving
which at git mixes with the gases passing in the direction indicated by arrows d
from the combustion chamber so as to cause their complete combustion.
The exhausted vitiated air passing as at c togetlier with the quantity of air.
entering as at a necessary for combustion is replaced by the same volume of pure
air passing as at through the fresh air conduit 3 and is preferably drawn from the
open air and passes through and into the room after having become heated on its
passage through the conduit 3.
The three walls Figs. 2 & 4 extend throughout the height of the stove the inner-
most one C being preferably formed of corrugated sheet or cast iron the middle
one A of cast iron provided with radiating ribs G and the exterior one K which
may be constructed of plain sheet or cast metal or ornamented to suit requirements.
The middle wall A is provided with a cover having radiating ribs M Figs. 2 & 5
and a charging door H. The ribs of the cover are partly surrounded by a crown
or rim N at the top of the outer wall K. The base or foot B E of the stove
Figs. 2 & 3 forms two separate compartments O and P. The lower compartiment !'
in which the pure air enters preferably from outside communicates through tubes F
with the conduit formed by the two outer walls A & K while the upper compart.
ment is in communication with the room and vitiated air conduit formed between
the innermost and middle walls C & A. The three walls C A K are intercepted
by the fire door I which may be of the usual construction having a slide or valve ['
so as to allow of the regulation of the quantity of air admitted to the combustion
chamber.
Independently of the air for combustion of which only a'amall quantity is required
a large volume passes from the room through openings D and into the channels.
formed by the corrugations between the two inner walls C and A where it becomes.
highly heated owing to the intimate contact with the heated surface of the inner-
most wall C whereby all impurities and germs are destroyed. On arriving at the
upper part the vitiated air at once mixes with the gases coming from the
combustion chamber and causes them to ignite and be completely consumed.
As the volume of air required for combustion which is allowed to enter by the
fire door I is very small it can be altogether neglected in regard to ventilation and
& stove constructed according to my system discharges from 100 to 110 cubic

page_text: meters of warm air per hour for each kil. of coke burnt which result is consider-
ably better than that of other slow combustion stoves with the same consumption
of coke.
The pure air entering E passes through the tubes F up into the outer conduit
formed by the walls A & K where it becomes thoroughly heated by contact with
the radiating ribs G and finally leaves at the top to warm the room.
The stove is charged with fuel through the door H and cleaned or stoked through
the door I.
When it is not required to constantly introduce pure air from outside into the
room the stove may be simplified by dispensing with the outer wall K tubes F and
the crown or rim N and allowing the ribs G provided on the wall A to radiate the
heat freely into the room and in this case the stove, which nevertheless retains
the slow combustion features will simply draw off and burn the vitiated air from
the room:
The arrangement of stove shown in Figs. 6, 7, 8 and 9 of the drawings requires
no further supplementary description and its construction will be at once clear from
the drawings.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed I declare that what I
claim is ;-
1. A thermo-ventilating slow combustion stove having walls such as C A forming
between them a passage or conduit which is preferably divided into a number of
chanuels by means of corrugations or equivalent in one of these walls this passage
communicating with the room by means. of openings D & d in the base or foot of
the stove and with the upper part of the combustion chamber near the outlet of the
gases in such manner as to draw from the room large quantities of vitiated air
besides that required for combustion entering through the door I of the stove, the
vitiated air being thoroughly heated and subsequently utilized for completing the
combustion of the gases substantially as described and illustrated in the accom-
panying drawings.
2. In a thermo-ventilating stove such as claimed in Claim 1 the arrangement of a
third wall such as K surrounding the walls C & A and ending in a crown or rim
such as N covering a part of the cover M so as to form in coujunction with the
wall A a conduit which communicates at the upper part with the room and at the
lower part with the compartment (E) in the base or foot D E of the stove by
means of tubes such as F, the said compartment being preferably in communication
with the open air so as to enable the air exhausted from the, room by the
conduits CA to be replaced by pure warm air substantially as described and
illustrated in the accompanying drawings.
Dated this 8th day of July 1893,
W. P. THOMPSON & BOULI,
Agents for the Applicant.