Improvements in Boilers.
Year: 1898

page_text: Improvements in Boilers.
WILLIAM GEIPEL & FREDERICK MONTAGUE TOWNSEND LANGE, Engineers, both
of 68, Victoria Street, Westminster, do hereby declare the nature of this inven-
tion to be as follows:-
This invention relates to boilers having internal flues, and has for its object an
improvement, in the circulation of the water at the bottom of the boiler, together
with an increase in the rate of raising steam. To attain this object we attach by
rivetting, bolting, welding or otherwise metallic ribs or projections of a conduct-
ing metal (preferably iron or steel) to the bottom of the flue projecting into the
water underneath the flue, and so conducting the heat from the flue down towards
the lowest strata of the water, these ribs may be either longitudinal or transverse,
or a combination of the two, and we may use one or more ribs.
By this arrange-
ment the water adjacent to the ribs is heated & rises up the sides thereof while
the colder water is drawn to the ribs & so circulation is set up. In addition
to which there is an extension of the heating surface & a general increase in the
rate of steam raising. We do not confine ourselves to the use of ribs or pro-
jections at the bottom of the flue only, but in some cases may arrange them all
over the flues. We do not bind ourselves to the particular form in which the
projections are made, so long as a ready path for thus conducting the heat to
the bottom of the boiler is provided in the form of metallic projections.
Dated this 23rd day of February 1898
W. GEIPEL,
F. M. T. LANGE,
Improvements in Boilers.
WILLIAM GEIPEL and FREDERICK MONTAGUE TOWNSHEND LANGE, 68, Victoria
Street, Westminster, S.W., Electrical Engineers, 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:-
This invention relates to boilers having internal flues and has for its object
an improvement in the circulation of the water at the bottom of the boiler,
together with an increase in the rate of raising steam,

page_text: To attain this object we attach by rivetting, bolting, welding or otherwise,
metallic ribs of a conducting metal (preferably iron or steel) to the bottom of
the flue, projecting into the water underneath the flue, and so conducting the
heat from the flue down towards the lowest strata of water, these ribs or pro-
jections may be either longitudinal or transverse, or a combination of the two,
and we may use one or more ribs.
To more fully illustrate the method of applying this invention we take the
case of a Lancashire boiler which, it is well known, has two internal flues, and in
the accompanying drawing Fig. 1 shows in longitudinal section a sufficient
portion of the Lancashire boiler to illustrate the invention while Fig. 2 is a
section of such a boiler. Wherein A is the metallic rib, or projection, consisting
of a conducting metal which is rivetted to the bottom of the internal flue, 1,
the said rib having a flange or angle C formed on it to facilitate the attachment.
It will be seen that the rib is divided up into sections in the particular case
illustrated so as not to interfere with the stiffening rings of the flue and for other
obvious reasons.
By this arrangement the heat from the fire inside the flue is conducted
down to the lower and colder portions of the water and circulation is set up in
the direction of the arrows shown in Fig. 2, that is to say the water adjacent
to the rib is heated and consequently being lighter rises up the sides of the ribs A
while the colder water is drawn towards the said ribs.
It is well known that without some means of circulating in such boilers the
water lies at the bottom more or less cold, in as much as the heat from the
internal flue can only be conducted downwards to the bottom strata by the
water itself which is a bad conductor of heat.
It is not necessary to dwell upon the advantages of an improvement in the
circulation of the water in the bottom of such boilers for it is universally
acknowledged that owing to the bottom parts of these boilers being colder than the
top severe strains are set up in the boiler plates and joints which tend to seriously
affect the lasting power of the boiler.
Our invention therefore by maintaining a more equable temperature of the
water tends to improve and increase the life of the boiler.
It will also be seen that the ribs form an increment to the available heating
surface, so that this together with the improved circulation of the water in the
boiler increases the rate of heating and of evaporating the water and at the same
time tends to increase the efficiency.
We do not bind ourselves to the use of the ribs or projections A at the bottom
of the flue only, but in some cases may arrange them all over the flues, provided
always that there is at least one rib projecting towards the bottom. Nor do
we bind ourselves to the particular form in which the projections are made, nor
to the material, so long as a ready path for conducting the heat to the bottom
of the boiler is provided. For example the rib instead of being longitudinal
may be transverse, or the projection may consist of a series of spikes, or they may
be of copper or other conducting material instead of iron.
It is important however that whatever the form the projection should have
ample sectional area in order to provide a sufficient conductivity for the heat.
The projections may be attached to the plain internal flues or to corrugated
or other internal flues. We do not confine ourselves to improving the Lancashire
type of boiler.
We may apply our invention to Cornish marine, or any other
type of boiler having internal flues. Nor do we confine ourselves to boilers for
heating or evaporating water, for we may apply our invention to boilers containing
liquid of any other kind.
Having now particularly described and ascertained the nature of the said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is;-
1. The attachment of a rib, or projection, to the underneath side of the flue

page_text: of an internal flue boiler projecting into the lower strata of the water substantially
as and for the purpose described.
2. The combination of the internal flue of a boiler and a rib, or projection,
or projections into the water below the said internal flue, as and for the purpose
described.
WILLIAM GEIPEL,
FREDERICK MONTAGUE TOWNSHEND LANGE.