Certain New and Useful Improvements in Steam Boiler Furnaces.
Year: 1896

page_text: Date of Application, 23rd Mar., 1896
Complete Specification Left, 19th Dec., 1896-Accepted, 6th Mar., 1897
Certain New and Useful Improvements in Steam Boiler Furnaces.
I, THOMAS YORK, of 118 East Third Street, Portsmouth, in the County of
Scioto and State of Ohio, in the United States of America, Engineer, do hereby
declare the nature of this invention to be as follows:-
This invention relates to improvements in steam boiler furnaces and the object
is to economize the fuel consumption, increase the rapidity and completeness of.
combustion, accelerate the boiler action and adapt the furnace to a varied range
of engines, which latter arrangement is more particularly referred to hereafter.
The first part of my invention consists in separating the furnace-grate into two
longitudinal horizontal sections by a dividing-wall over which the heat current
passes from one section to the other whence it makes its way to the very rear of
the boiler and thence by means of fire-tubes through the boiler to the front thereof
where provision is made for discharging it into the atmosphere by a funnel or stack
in the ordinary manner I also alternate the furnace draft so as to blow only one
section of the grate-fire at a time in order that the heat-current produced as
described may not be neutralized or obstructed by a counter-current caused by
blowing both grate-sections at the same time, by these means I manage to so
thoroughly convert the fuel into heat as to produce a practically smokeless
furnace.
As an extension of these arrangements I carry the grate-dividing wall up to the
boiler shell, aperturing it for the passage of the heat current from the blow grate
section over and back of the other, making the wall hollow instead of solid so that
the gases of the combustion may fill it and by aperturing the front face of the
hollow wall for the admission of air to the interior, intensify the combustion and
accelerate the current.
The furnace is built up thus.
The boiler is tightly enclosed in a roomy casing the divided grate being about
midway between the boiler. and the base of the furnace, the draft chambers
provided with doors are situated beneath the grate and also serve as the ash pits, .
there are also provided a pair of stoking doors above the grate, a wall rises
vertically from the base of the boiler case to the bottom of the boiler dividing the
grate centrally and longitudinally and extending back till it unites with a cross
wall which also rises from the base of the casing to the bottom of the boiler and
like the other wall embraces the segmental outline of the boiler tightly, the first
named wall is hollow within providing a long high narrow chamber and through
the wall above the grate level, and running longitudinally from nearly the front
to the rear of the wall is an aperture through which the gases of combustion
formed by the grate fires can enter and leave the chambers within the wall, draft
holes preferably with an inward taper are formed in the otherwise solid face of.
the wall below the grate level to increase the draft by which the gases are to be.
blown into a current to take them to the rear of the boiler, for the passage of
this current an outlet closed by a hand operated valve stopper is formed above
the grate level in the transverse wall, one outlet at the rear of each grate.
section. Obviously a funnel or stack is employed in connection with these
arrangements.

page_text: In order to operate this improved furnace, assume the fires and the boiler to be
in action with both fuel doors closed. Open the draft door beneath the left hand
grate section and close the other, open also the right hand outlet in the back wall
of the furnace and close the other, the fire on the left hand grate section will be
blown and the heated gases will pass through and into the chambered dividing-wall
and the draft holes in that wall will assist the draft beneath the active fire in
further vaporizing them through the open outlet of the back furnace wall unable
otherwise to expand or escape they will pass into and through the fire tubes of the
boiler to the front of the boiler-case and be drawn out through the funnel and
mingle with the atmosphere robbed of smoke in their long and fiery journey,
furthermore I may arrange for passing these gases again through the fire and boiler
or otherwise use them before their final dispersion.
When the left hand fire section needs stoking it can be thrown out of use by
closing its draft door and corresponding outlet in the back wall and opening the
other door and outlet.
I may choose to stopper the draft holes in front of the partition-wall in any
suitable manner, but in practice have not found that they need closing at any time
except possibly when the fires are to be started or banked.
Dated this 20th day of March 1896.
EDWD. J. PAYNE & SON,
104 Colmore Row, Birmingham, Patent Agents for the Applicant.
Certain New and Useful Improvements in Steam Boiler Furnaces.
I, THOMAS YORK of 118 East Third Street Portsmouth in the County of
Scioto and State of Ohio one of the United States of America 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 and with reference to the accompanying sheet of drawings:-
This invention relates to improvements in steam boiler furnaces and the objects
of these improvements are to economize the fuel consumption increase the rapidity
and completeness of combustion accelerate the boiler action and adapt the furnace
to a varied range of engines.
The first part of my arrangements consist in separating the furnace grate into
two longitudinal horizontal sections by a dividing wall over which the heat current
passes from one section to the other whence it makes its way to the very rear of
the boiler and thence by means of fire tubes through the boiler to the front thereof
where provision is made for discharging it into the atmosphere by a funnel or
stack in the ordinary manner. I also alternate the furnace draught so as to blow
only one section of the grate fire at a time in order that the heat current produced
as described may not be neutralized or obstructed by a counter-current by blowing
both grate sections at the same time, by these means I arrange to so thoroughly
convert the fuel into heat as to produce a practically smokeless furnace.
As an extension of these arrangements I carry the aforesaid grate dividing wall
up to the boiler shell aperturing it for the passage of the heat current from the
blown grate section over and back of the other, making the wall hollow instead of
solid, so that the gases of the combustion may fill it and by aperturing the front
face of the hollow wall for the admission of air to the interior intensify the
combustion and accelerate the current.
In the accompanying drawings, wherein like letters represent like parts-
Fig. 1 is a vertical longitudinal section of a furnace. Fig. 2. a vertical cross

page_text: Fection thereof, and Fig. 3. represents a horizontal section through the lower part
of the furnace.
A is the boiler and B the roomy casing in which it is tightly enclosed. C is the
divided grate. D represents the two doors of the draught chambers (also serving as
ash pits) below the grate and E represents the pair of fuel and stoking doors above
the grate. F is the funnel or stack. G is the wall rising vertically from the base
of the boiler case to the bottom of the boiler dividing the grate centrally and
longitudinally and extending back till it unites with the cross wall H which also
rises from the base of the casing to the bottom of the boiler and like the other wall
embraces the segmental outline of the boiler tightly. The wall G is hollow within
providing a long high narrow chamber g, and through the wall above the grate
level and running longitudinally from nearly the front to the rear of the wall is an
aperture & through which the gases of combustion formed by the grate fires can
enter and leave the chamber within the wall. Draught holes C preferably with
an inward taper are formed in the otherwise solid base of the wall below the grate.
level to increase the draught by which the gases are to be blown into a current to.
take them to the rear of the boiler.
For the passage of this current an outlet d closed by a hand operated valve
stopper e is formed above the grate level in the wall H, one outlet at the rear of
each grate section.
I am aware that it is not new to construct boiler furnaces with apertured and
chambered inner walls by which the furnace grate is divided the draught
alternated and the gases of combustion directed and controlled and for that reason,
I claim nothing broadly for my own construction.
To operate this improved furnace, assume the fires and the boiler to be in
action with both fuel' doors closed. Open the draught door beneath the left
hand grute section and close the other. Open also the right hand outlet
in the back wall of the furnace and close the other. The fire on the left hand
grate section will be blown and the heated gases will pass through and into.
the chambered dividing wall and the draught holes in that wall will assist the
draught beneath the active fire in further vaporizing them and forcing. them.
through the open outlet of the back furnace-wall. Unable otherwise to expand or
escape they will pass into and through the fire tubes a of the boiler to the front
of the boiler case and be drawn out through the funnel and mingle with the
atmosphere robbed of smoke in their long and fiery journey.
I may arrange for passing these gases again through fire and boiler or otherwise.
using them before their final dispersion.
When the left hand fire section needs stoking it can be thrown out of use by
closing its draught door & corresponding outlet in the back wall & opening the
other door and outlet.
I may choose to stopper the draught holes in front of the partition wall in any
suitable manner but in practice have not found that they need closing at any time-
except possibly when the fires are to be started or banked.
Having now particularly described and ascertained the nature of my said inven
tion and in what manner the same is to be performed I declare that what I
claim is-
The combination in a steam boiler furnace of the casing enclosing the boiler, the-
furnace at the front end of the boiler, the grate beneath the boiler, at the front
end of the casing, the pair of draught doors beneath the grate, in the front face of
the casing, the pair of stoking doors above the grate in the front face of the
casing, the cross wall in rear of the grate, extending upward from the floor of the
casing, closely engaging the shell of the boiler, and 'having the pair of outlets.
above the grate level, each provided with a valve stopper, and the partition wall.
longitudinally bisecting the grate, extending upward from the floor of the casing
to a close engagement with the boiler shell, provided with the horizontal aperture
in the upper part of said wall, and the vertical chamber within said wall and,

page_text: having also the draught holes in the front face thereof, the whole constructed and
arranged substantially as and for the purposes described.
Dated this 18th day of December 1896.
EDWD. J. PAYNE & SON,
Warwick Chambers, 104, Colmore Row, Birmingham,
Patent Agents for the Applicant.