Improvements in Steam Generators and Means for Consuming Smoke.
Year: 1891

page_text: Date of Application, 17th Feb., 1891
Complete Specification Left, 17th Nov., 1891-Accepted, 19th Dec., 1891
PROVISIONAL SPECIFICATION.
Improvements in Steam Generators and Means for Consuming
Smoke.
I, WILLIAM BAXENDALE, of 156, Shaw Road, Oldham, in the County of
Lancaster, Engineer, do hereby declare the nature of this invention to be as
follows:-
This invention has for its object the prevention of smoke and a better utilization
of the furnace heat than heretofore has been the case.
To this end my invention consists in forming the boiler or furnace flue with a
double furnace preferably arranged side by side.
These furnaces join the flue at one point and are each furnished with a door
having a damper or slide for the admittance of air. When each of the said
furnaces has been charged with fuel and lit, the damper or slide of one furnace is
closed or nearly so, while the damper or slide of the other furnace remains open.
This causes the gases to be liberated from the fuel in the first named furnace and
the hot gases in the last named furnace to attract and burn the smoke at the point
of their junction. When the gases from the first named furnace are all absorbed,
the respective damper or slide is opened and a fresh supply of fuel fed into the last
named furnace and the respective damper or slide closed so as to alter the function
of the furnaces vice versa.
In order to utilize the heat from the boiler or furnace flue more advantageously,
I form a short distance apart at the back thereof a deflector and in the boiler itself,
in a longitudinal inclined position, I employ one or more pipes, the back orifices of
which communicate with the space between the end of the boiler and the said
deflector and the front orifices respectively with a flue formed in the seating of the
boiler. The hot gases from the boiler or furnace flue are thus caused to return
through the said pipe or pipes to near the front of the boiler and then make their
way underneath the boiler through the said flues into the chimney.
Dated this 16th day of February 1891
F. BOSSHARDT & Co.,
Agents to Applicant.
COMPLETE SPECIFICATION.
Improvements in Steam Generators and Means for Consuming
Smoke.
I, WILLIAM BAXENDALE, of 156, Shaw Road, Oldham, in the County of
Lancaster, Engineer, do hereby declare the nature of this invention and in what
manner the same is to be performed to be particularly described in and by the
following statement :-
This invention has for its object the prevention of smoke and a better utilization
of the furnace heat than heretofore has been the case.
And in order that my invention may be more fully understood I have caused to
be appended hereunto one sheet of drawings marked with letters of reference
indicating like parts in the various figures.
Fig. 1 is a longitudinal section, Fig. 2 a sectional plan Fig. 3 a cross section
through A-B of Fig. 1 and Fig. 4 an end view of a boiler provided with my
improvements.
În carrying out my invention and referring to the figures generally my improve-
ments consist in forming the boiler or furnace flue a with a double furnace b, b¹,
preferably arranged side by side.

page_text: These furnaces b, b', join the flue a at one point and are each furnished in front
with a door e, e' having a damper or slide d, d for the admittance of air. When
the furnaces b, b¹, have been charged with fuel and lit, the damper or slide d of the
furnace is closed or nearly so while, the damper or slide d', of the other furnace 6¹
remains open. This causes the gases to be liberated from the fuel in the furnace b
and the hot gases in the furnace to attract and burn the smoke at the point of
their junction. When the gases from the furnace are all absorbed, the respective
damper or slide d is opened and a fresh supply of fuel fed into the furnace b¹ and
the respective damper or slide d¹ closed, so as to alter the function of the
furnaces b, b, vice versa. In order to alternately produce a down and up draught in
the furnaces b, b', principally when using very damp coal and thus expel the
moisture therefrom, I employ at the back of the furnace b, », respectively, a semi-
circular damper e attached to a rod reaching to the front of the furnace, by
means of which rod the position of the dampere can be altered at will and thus
communication between the space above the fire bars and the boiler flue cut off or
established and the air passed respectively down or up the fire bars into the boiler
flue a.
To prevent the air entering the flue a through the ash space below the fire
bars, when it is desired to produce a down draught in one or the other of the two
furnaces b, I employ in front of the furnace a door g, arranged to be slid on a
rod from one furnace to the other to cover the respective flue orifice.
In order to utilize the heat from the boiler or furnace flue a more advantageously,
1 form a short distance apart at the back thereof a deflector i, see dotted lines, and
in the boiler itself in a longitudinal inclined position, I employ one or more pipes k,
see dotted lines, the back orifices of which communicate with the space l, between
the end of the boiler and the deflector i and the front orifices respectively with
flues m formed in the seating of the boiler. The hot gases from the boiler or
furnace flue a are thus caused to return through the pipe or pipes k to near the
front of the boiler and then make their way through the flues m into the chimney
flue n.
In lieu of passing the hot gases through pipes k, the same may be caused to pass
from the boiler or furnace flue a, along each side of the boiler through the flues m
and return into the chimney fluc through the central flue o, as indicated by the
arrows.
Having now particularly described and ascertained the nature of this inven
tion and in what manner the same is to be performed, I declare that what I
claim is-
"In steam generators,"
1st. The general arrangement and combination of parts constituting my improve-
ments operating substantially as and for the purpose set forth.
2nd. The use of two furnaces, ', furnished with doors c, c' having dampers d, d¹
in combination with one boiler or furnace flue a, adapted to effect a low combustion
or gassing of the fuel in one of the furnaces, whilst the smoke resulting therefrom is
attracted and burned in the flue « by the live fire in the other furnace, substantially
as set forth.
Dated this 16th day of November 1891.
F. BOSSHARDT & Co.,
4, Corporation Street, Manchester, Agents to Applicant.