Improvements in the Construction and Working of Secondary or Regenerative Furnaces for Steam Boilers, Stationary and Marine, and Furnaces for other purposes.
Year: 1897

page_text: Improvements in the Construction and Working of Secondary or
Regenerative Furnaces for Steam Boilers, Stationary and Marine,
and Furnaces for other purposes.
:-
WILLIAM WOODLAND, 3, Shafton Road, South Hackney, N.E., Engineer, HOWELL
BENSON PHILLIPS, "Trevanion," The Grove, Wandsworth, S.W., Secretary to a
Public Company, do hereby declare the nature of this invention to be as follows:-
This invention has for its object the keeping of the blocks of asbestos or asbestos
and other fire resisting substance used in secondary or regenerative furnaces free
from dust or unconsumed matter deposited from the fuel, allowing free access of
heated air to mingle with the smoke and gases, thus ensuring perfect combustion
and absence of smoke with economical working.
In carrying out the improvements we place behind the first fire bridge, a second
bridge at a suitable distance, in or upon which are fixed the ends of iron or steel
bars of T or other suitable section the top portion of flange is slotted or grooved
at places to allow bars of steel or iron to rest therein either in a rigid or movable
state, the bars are of flat section and placed edgeways into the slots formed to
receive them at suitable distances apart. Upon the bars we place blocks of special
shapes and forms made of asbestos or asbestos mixed with other suitable fire
resisting materials. The bottom of the blocks being formed with a groove or
channel which fits upon the bars of iron or steel, the bars and blocks resting
upon them remain in a rigid state and are capable of receiving a rocking or other
suitable motion by means of tails or ears or the like connected to the lower portion
of the bars and manipulated from the front end of furnace by means of a rod
The blocks are placed at suitable distances apart to allow air to pass freely
between them. Any number of blocks may be used and made capable of receiving
the rocking or other movement, or remain stationary as desired. The object of
moving or rocking the blocks is to remove the dust or unconsumed material lodged
or collected upon or between them which then falls into the chamber below
thereby allowing free access of air through and between the blocks.
The bars or plates supporting the blocks being placed edgeways offer no resis
tance or obstruction for dust or dirt to lodge or accumulate, thus retaining the air
passages open and free.
The front bridge may have an opening through the lower part and be fitted
with a door opening into the chamber of the secondary furnace for the supply
of air thereto, also a second door opening into the ash pit of the first furnace
through which the dust or dirt can be withdrawn from the chamber of the
secondary furnace, the door or doors are made to open or close by means of a rod
or rods at the front end of furnace.

page_text: The same arrangement of door or doors within the bridge may be used in
conjunction with a plate used to conduct the air supply to the secondary furnace.
Dated this 12th day of August 1897.
WILLIAM WOODLAND.
H. B. PHILLIPS.
Improvements in the Construction and Working of Secondary or
Regenerative Furnaces for Steam Boilers, Stationary and Marine,
and Furnaces for other purposes.
We, WILLIAM WOODLAND, of 3, Shafton Road, South Hackney, Engineer, and
HOWELL BENSON PHILLIPS, of "Trevanion," The Grove, Wandsworth, Gentlemen,
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 accompanying drawing:-
This invention has for its object keeping blocks of asbestos or asbestos and
other fire or like resisting substance proposed to be used and fitted as in manner
hereinafter described in secondary or regenerative furnaces, free from dust or
unconsumed matter, as may be deposited from time to time from the fuel, allowing
free access of heated air to mingle with the smoke and gases, thus ensuring
perfect combustion and absence of smoke with economical working.
In carrying out such improvements we propose to place behind the first fire
bridge a second bridge at a suitable distance apart from same, in or upon which
are fixed the ends of iron or steel bars of T, or other suitable section, the top
portion of flange is or may be slotted or grooved at certain places in its length
to allow cross bars of steel or iron to rest therein, either in a rigid or movable
state, these bars would be of flat section and placed edgways into the slots formed
to receive them at suitable distances apart. Upon the bars we place blocks com-
posed of asbestos and other fire resisting material or substance of special shape
and form. The bottom of these blocks would be formed with a groove or channel
enabling them to fit and take upon the longitudinal bars of iron or steel, the
bars and blocks resting upon them, as in manner described remain in a rigid and
vertical state and are capable of receiving a rocking or other suitable motion by
means of tails or ears or the like, connected to the lower portion of the bars and
manipulated from the front end of the furnace by means of a rod.
The blocks are placed at suitable distances apart to allow air to pass freely
between them. Any suitable number of blocks may be used and a portion of same
or the entire quantity may be made capable of receiving the rocking or other
movement or remain stationary as desired.
The object of moving or rocking the blocks is to remove the dust or unconsumed
material lodged or collected upon or between them, which then falls into the
chamber below, thereby allowing free access of air through and between the blocks.
The bars or plates supporting the blocks being placed edgways offer no resistance
or obstruction for dust or dirt to lodge or accumulate thus retaining the air
passages open and free.
The front or fire bridge would have an opening through the lower part and
may be fitted with a door opening into the chamber of the secondary furnace for
the supply of air thereto, also a second door or opening may be fitted into the ash
pit of the first furnace through which the dust or dirt can be withdrawn from
the chamber of the secondary furnace, the door or doors would be made to open

page_text: or close by means of a rod or rods at the front end of the furnace. The same
arrangement of door or doors within the aforesaid bridge or bridges may be used
in conjunction with a plate or tube to conduct the air supply to the secondary
furnace.
In the accompanying drawing-Figure 1, exhibits a longitudinal section of a
horizontal single flued boiler. Figure 2, is a cross or vertical section taken on the
line ab of Figure 1, and Figure 3, is a further cross vertical section taken on
the line of Figure 1. Figure 4, is a detached view to an enlarged scale
shewing a front view of the fire resisting blocks in position, and Figure 5 is a
detached side view of same likewise in position. Figure 6, shews a separate view
of a fire resisting block having a different sectional form such as we may in some
cases propose to adopt. Figure 7 shews a front or end view of same and Figure 8
a cross section of same:-
The letters of reference given refer to like or corresponding parts throughout:
A, is the front or ordinary fire bridge having an opening A¹, at the lower part
and a door or doors hinged, pivotted or otherwise fitted preferably at the back or
inner portion of the fire bridge opening and worked or regulated by means of a
rod to regulate the admission of air, and when required to permit of any refuse
to be easily withdrawn from behind the bridge. B, is a second bridge; a series
of cross bars C, C, of flat section are provided which take or rest into a series of
grooves or slots formed apart at suitable distances in the longitudinal bearing
bars as shewn at D, D. These bars are themselves supported upon or within the
brickwork of the bridges A and B. Upon the length of the said cross bars C, C
are placed a series of blocks E, E of suitable fire resisting and heat retaining
material and kept vertically in position by means of slots or grooves formed in
the lower or elongated portion of the blocks.
The upper portion of the fire resisting blocks E, E may be either of rectangular
section and of solid form or may be of ribbed or flanged sectional form but in
either case would have perforations formed through same.
For the particular object and purpose of this invention, a certain or required
number of the fire resisting blocks would have a rocking motion given to them
whenever desired which may be effected as in manner shewn in the drawing and
more particularly by the Figures 4 and 5 to a slightly enlarged scale. Motion
is imparted to the cross flat sectional bars C, C, likewise the blocks E, E firmly
resting or fitting upon same, through the down tails or vertical attachments F, F,
which are connected together by a rod or bar G, by means of pins or bolts and
actuated at times by a temporary or removable hooked rod H.
In the grooves or channels formed in the longitudinal bearing bars some portions
are made of V or U shape to receive the bars C, C, for permitting the rocking
movement or action to be effected. The other grooves or slots are made parallel
for the bars and certain number of the blocks thereon would be held stationary
as may be considered advisable.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is:-
1. The method of using flat bars of iron or steel placed upon their edge into
grooves formed in the bearing bars which are suitably supported upon or within
the inner portions of the front or fire bridge and that of the second bridge. And
upon the upper edged portion of the said flat bars-fire blocks composed of asbestos
and other suitable fire resisting material having grooves or slots formed in their
lower portions so as to take and be securely held in position thereby. A certain
or regulated number of the said flat bars together with the blocks mounted thereon
are so arranged and capable of having a rocking or to and fro motion imparted
to them whenever desired, actuated by means of a rod or connection, or other
suitable means from the front portion of the furnace, and a certain or regulated
number of the flat bars and fire blocks mounted thereon would or may be caused
to remain stationary. So that the rocking motion given to the series of fire blocks

page_text: as from time to time will cause all accumulations of unconsumed matter from the
fuel to be deposited below and clear of the blocks and air divisional spaces between
same substantially as in manner herewith illustrated and described.
2. The particular method of fitting and applying fire resisting blocks of particu-
lar form and shape each one to a certain extent overlapping a portion of the other
so as to permit of the air in a heated state entering freely from beneath same and
being split up or deflected in its upward passage around the said blocks and from
one to the other. Thus enabling the blocks to be kept in an intensely heated or
incandescent state, for the particular specific object and purpose-substantially
as in manner herewith illustrated and described.
WILLIAM WOODLAND.
H. B. PHILLIPS.