Improvements in Boiler or Furnace Flues.
Year: 1890

page_text: Date of Application, 3rd Feb., 1890
Complete Specification Left, 3rd Nov., 1890-Accepted, 6th Dec., 1890
PROVISIONAL SPECIFICATION.
Improvements in Boiler or Furnace Flues.
I, SAMUEL KING BARNES of 121 County Terrace, New Kent Road, in the County
of Surrey, Engineer, do hereby declare the nature of this invention to be as follows:-
My invention relates to the flues of boilers or furnaces and consists of an improved
bridge or baffle plate to be fitted therein, and so constructed that it may be easily yet
strongly put together, and at the same time it will effect economy in the fuel of the
furnace by causing greater efficiency of evaporation.
My invention is composed of suitably formed blocks of fire-brick or other refractory
material, provided with suitable apertures from which a second or more bridges or
perforated baffles, may be constructed in the flues or tubes of Cornish or other boilers
or furnaces.
The blocks are provided with feathers or other projections on their upper edges
over which engage suitable recesses or grooves in the under faces of the blocks above,
and thus close or lock the horizontal joints.
The vertical edges are provided with vertical grooves or recesses, which come face
to face, where the blocks are brought together and the vertical joints are then keyed
by dropping into these grooves pins or keys of fire clay to lock the same together.
The blocks are provided with suitable orifices through which the hot gases (though
retarded) pass, and the side orifices are arranged diagonally through these secondary
bridges, so as to cause the gases to impinge upon the interior wall of the boiler tube.
The hot gases. are those prevented by my secondary bridge or baffles, from being
carried too rapidly away, and the bridges take up and absorb the heat of the gases,
imparting the same to the surrounding tube, and at the same time direct the passing
gases to impinge upon the walls of the tube and thus cause greater evaporation, entire
consumption of smoke and economy of fuel.
Dated this 3rd day of February 1890
FELL & WILDING,
1, Queen Victoria Street, E.C., Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Boiler or Furnace Flues.
I SAMUEL KING BARNES of 69 Falmouth Road, New Kent Road, in the County of
Surrey, 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 :-
My invention relates to the flues of boilers or furnaces, and consists of an improved
bridge or baffle plate to be fitted therein so constructed that it may be easily yet
strongly put together and at the same time it will effect economy in the Bues of the
furnace by causing greater efficiency of evaporation.
In order that my invention may he the better understood I now proceed to describe
the same in relation to the drawings hereunto annexed reference being had to the
letters and figures marked thereon.
Figure 1. is a front elevation of one form of my improved bridge arranged within
a furnace tube of a boiler.
Figure 2. is a sectional side elevation of the same showing the locking of the various
fire bricks or blocks one to another.
Figure 3. is a sectional plan showing the diverging passages, between the fire
bricks or blocks.

page_text: My improved bridge is composed of suitably formed blocks A, C, of fire brick or
other refractory material of such shape or shapes as to be capable of forming a bridge
similar to that shown in Figure 1.
Suitable apertures B, are provided between the bricks through which the gases
pass as seen in Figure 3. The passage have a diverging direction in order to cause
the impingement of the gases passing through the bridge upon the sides of the first
tube of the boiler thus effecting considerable increase in the efficiency of evaporation.
The method of interlocking the bricks one into another so as to form a firm structure
is shown in Figure 2.
The longitudinal bricks C are formed with a groove on their under side and a
projecting rib on their upper side as also are the bricks A that are stood on edge.
By this arrangement it is obvious that upon building the bricks one upon the other
starting from the bottom a thorough system of locking is maintained throughout, the
top brick or block having a suitable channel provided on its side leading to the groove
in the centre to permit of its being pushed in from the end thus completing the baffle
plate.
The bricks or blocks may equivalently be provided with feathers or other projections
which may engage into suitable recesses or grooves in the under faces of the blocks
above where circumstances do not admit of the locking shown in Figure 2.
The spaces between the bricks through which the gases pass may be varied
according to the character of the fuel burnt or the amount of draught obtainable.
My improved bridge or baffle plate prevents the hot gases which are given off from
the fuel being carried too rapidly away; the bridge taking up and absorbing some of the
heat from the gases and imparting the same to the surrounding tube and at the same
time directing the gases passing through the orifices in the bridge so as to impinge
upon the walls of the tube effecting the entire consumption of the smoke and great
economy of fuel.
In some cases I may arrange two or more of my baffle plates in the furnace tube of
a boiler to more effectually abstract the heat from the gases.
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
1st. The construction and arrangement of one or more baffle plates in boiler or
furnace flues consisting of bricks or blocks of fire bricks or other refractory material
locked together by ribs and grooves upon the same, passages diagonal to the surface
to the heated being provided through the same battle plate or plates, to cause the
impingement of the hot gases on the said heating surface.
2nd. The construction and arrangement of a baffle plate in a furnace flue substantially
as described and illustrated in the accompanying drawings.
Dated this 3rd day of November 1890.
FELL & WILDING,
1, Queen Victoria Street, E.C., Agents for the Applicant.