IMPROVE- MENTS IN MEANS AND APPLIANCES FOR HEATING STEAM BOILERS
Year: 1883

page_text: LETTERS PATENT to Howard Lane, of 115 Palmerston Buildings, Old Broad
Street, in the City of London, Civil Engineer, for an Invention of "IMPROVE-
MENTS IN MEANS AND APPLIANCES FOR HEATING STEAM BOILERS,"
PROVISIONAL SPECIFICATION left by the said Howard Lane at the Office
of the Commissioners of Patents on the 20th August 1883.
HOWARD LANE, of 115 Palmerston Buildings, Old Broad Street, in the City of
London, Civil Engineer. "IMPROVEMENTS IN MEANS AND APPLIANCES FOR HEATING
STEAM BOILERS
"
.My invention has for its object, the better application and distribution of heat
to "tubulous steam boilers, being that class of boilers partially or entirely
composed of tubes containing water and steam or water only, and the beat being
applied to the external portions or surfaces of such tubes.
It is usual, with this class of boiler, to fix flat baffle plates upon portions of the
tubes, which cause the heated gases to travel from back to front and from front to
back alternately. This arrangement induces the currents to travel past the tubes
in a more or less longitudinal direction. It is well known that, to obtain the best
results, such gases should pass the tubes transversely to their length, and this is
effected by the means and arrangements forming the subject of my invention.
I construct baffle plates of a modified V form of section, the two angular sides
being curved, and forming V channel plates. These plates may be formed of cast
iron, rolled iron, fire-clay, or any other suitable material capable of withstanding
heat.
In making these plates of various materials it is sometimes preferred to make
them in the form of a curved triangular section.
Ribs, or distance pieces, are cast or otherwise formed upon the plates at suitable
intervals, and the lengths of the plates are suited to the convenience of rendering
them portable.
These plates are placed between the tubes, and above or partially above their
centres, the distance pieces resting on the tubes; the distance of the baffle plates

page_text: from each tube is dependent upon the depth of the distance pieces, and such baffle
plates are pieced, or placed together end to end, to baffle the whole length of the
flue space between the tubes.
In so fitting a "Tubulous" boiler, I prefer to work some of the lower tubes
without baffle plates, and to apply the plates to the upper rows, the distance pieces
being inado to suit tho draught, the rate of combustion, and area of fire grate.
The effect of this arrangement is that the heated gases impinge upon the tubes
at right angles to their length, or nearly so; and such gases are compelled to pass
close to and round a considerable portion of the circumference of each tube, before
they escape to the next row, or to the flue. The heating suface is thus made very
effective, and the boiler is rendered economical in fuel.
My said invention is applicable to many forms of tubulous boilers.
When placing such baffle plates to the sides of horizontal or vertical water tubes
adjoining the walls or sides, I make the said baffle plates of a half section.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent, filed by
the said Howard Lane in the Patent Office on the 20th February 1884.
HOWARD LANE of 115 Palmerston Buildings Old Broad Street in the City of
London Civil Engineer IMPROVEMENTS IN MEANS AND APPLIANCES FOR HEATING
STEAM BOILERS ·
My invention has for its object the better application and distribution of heat to
tubulous steam boilers, being that class of boilers partially or entirely composed
of tubes containing water and steam or water only and the heat being applied to
the external portions or surfaces of such tubes.
It is usual with this class of boiler to fix flat baffle plates upon portions of the
tubes which cause the heated gases to travel from back to front and from front to
back alternately-This arrangement induces the currents to travel past the tubes
in a more or less longitudinal direction. It is well known that, to obtain the best
results, such gases should pass the tubes transversely to their length, and this is
effected by the means and arrangements forming the subject of my invention.
I construct baffle plates of a modified V form of section, the two angular sides
being curved and forming V channel plates-These plates may be formed of cast
iron, rolled iron, fire-clay or any other suitable material capable of withstanding
heat.
In making these plates of various materials it is sometimes preferred to make
them in the form of a curved triangular section
Ribs or distance pieces, are cast or otherwise formed upon the plates at suitable
intervals, and the lengths of the plates are suited to the convenience of rendering
them portable These plates are placed between the tubes and above or partially
above their centres, the distance pieces resting on the tubes; the distance of the
baffle plates from each tube is dependent upon the depth of the distance pieces and
such baffle plates are pieced or placed together end to end to baffle the whole
length of the flue space between the tubes.
In so fitting a Tubulous boiler I prefer to work some of the lower tubes without
baffle plates, and to apply the plates to the upper rows, the distance pieces being
made to suit the draught, the rate of combustion and area of fire grate.
The effect of this arrangement is that the heated gases impinge upon the tubes
at right angles to their length, or nearly so; and such gases are compelled to pass
close to and round a considerable portion of the circumference of each tube before
they escape to the next row, or to the flue The heating surface is thus made very
effective, and the boiler is rendered economical in fuel.
My said invention is applicable to many forms of tubulous boilers
When placing such baffle plates to the sides of horizontal or vertical water tubes
adjoining the walls or sides I make the said baffle plates of a balf section.
And in order that my said invention may be more clearly understood, reference is
hereby made to the accompanying drawings wherein similar letters of reference
indicate corresponding parts. Fig: 1 is a sectional' view, and Fig: 2 is a side view
shewing the method of applying my invention.
In. Fig 1. a, a, a, are three tubes forming a portion of a steam generator-b. b
are two baffle plates, and c is a modified form of baffle plate for placing next to the
wall. The distance pieces dd govern the space for the passage of the heated
gases. Fig: 2 shews a portion of one tube a and baffle plate b with distance
nience & A

page_text: Having thus 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 and means of increasing the effectiveness of the heating surface of
tubulous boilers substantially as hereinbefore described and shewn on the
drawings
2 The manufacture and use of bafflers for the purpose and in manner hereinbefore
described and shown on the drawings, or any mere modification thereof.
In witness whereof I, the said Howard Lane have hereunto set my hand and
seal this eighteenth day of February in the year of our Lord 1884.
HOWARD LANE. (L.S.)