Tubulous and Water Tube Steam Generators.
Year: 1886

page_text: Date of Application, 4th Dec., 1886
Complete Left, 5th Sept., 1887.
Complete Accepted, 21st Oct., 1887.
TROYINIONAL DIMITTUATION.
Tubulous and Water Tube Steam Generators.
I, TOM WILLIAM BAKER, of 150 Palmerston Buildings, London, in the County of
Middlesex, Engineer, do hereby declare the nature of this invention to be as
follows:-
My invention is applicable to any form of internally fired boiler, such as boilers of
the Lancashire, Cornish, vertical, marine, or locomotive types.
The object is to effect a more economical use of such boilers by the application of
inclined water tubes (that is, tubes with water passing through them) to the internal
furnaces and flues of same, whereby the products of combustion become disseminated
and absorbed, and a perfect circulation of water obtained, so that the different parts
of the boiler are sustained at practically the same temperature, and the steam as
generated is more quickly conveyed to the steam space.
For this purpose I arrange any suitable number of tubes in the flue or flues of such
boilers, one end of same being situated over the furnace, and the tubes then continued
along the flue to near the other end of the boiler. The tubes are placed longitudinally
side by side in rows, and preferably "staggered "in relation to each other, that is to
say the tubes in one row are opposite the spaces left between those of the adjacent
rows, and such tubes are more or less inclined from the horizontal, and are fixed at
both ends in hollow boxes or casings.
In the case of horizontal boilers the ends of the tubes over the fire bars are placed
near the top of the flue, and slant downwards as they proceed along same, so that their
further ends are situated near the bottom of the flue.
In the case of vertical boilers the ends of the tubes nearest the fire bars are placed
near one side of the flue, and the tubes then slant across such flue towards the opposite
side and upper end of same.
It will be seen therefore that the tubes form a kind of diagonal partition arranged
along the whole or the greater part of the length of the flue, so that the flames and
products of combustion from the furnace come in contact with and pass around and
are disseminated among the tubes on their way through the flue, thereby efficiently
heating the tubes in their passage.

page_text: The whole of the tubes are at one end connected to a box or casing communicating
with the water space of the boiler near one end of same, and at the other end such
tubes are connected to a similar box or casing communicating with the water space
near the other end of the boiler, so as to allow free passage for the water to and from
the tubes and thus ensure a complete and efficient circulation of the water. It is
preferable to make the boxes or casings project into the fluc, and also to so form them
that at their point of connection with the shell of the flue a certain amount of
flexibility will be allowed, whereby suitable provision will be made for the expansion
and contraction of the tubes due to any variations in the temperature of same through-
out their length. For this purpose the boxes or casings will be preferably formed of
malleable cast steel, and their width at their point of connection with the shell of the
flue be less than the width of the part into which the tubes are inserted.
In the case of vertical boilers the top ends of the tubes may pass through the crown
plate of the fire box directly into the water space above, the crown plate being
preferably bent downwards where the tubes enter same, so as to bring such part
parallel with the top plate of the box or casing into which the bottom ends of the
tubes enter, and such bottom box or casing is preferably built into the fire box from
the bottom of the water space and opposite the fire door.
In the case of short boilers, such as locomotive and marine, the front ends of the
tubes may pass through the front plate of the fire box directly into the water space
between it and the outer shell of the boiler, and the rear ends be connected to a box
or casing arranged in the smoke box and communicating with the water space at
that end of the boiler.
This invention is applicable to existing Marine, Cornish, Lancashire, Vertical and
Locomotive boilers, as well as adapted to new boilers to be constructed.
Dated this 4th day of December 1886.
ALLISON BROS.,
Agents for the Applicant.

page_text: 1, TOM WILLIAM BAKER, of 150 Palmerston Buildings London in the county of
Middlesex, Engineer, do hereby declare the nature of the said invention and in what
Danner the same is to be performed to be particularly described and ascertained in
and by the following statement —
My invention is applicable to any form of internally fired boiler, such as boilers of
the Lancashire Cornish Vertical, Marine, or Locomotive types.
The object is to effect a more economical use of such boilers by the application of
inclined Water Tubes (that is, tubes with Water passing through them) to the internal
furnaces and flues of same, whereby the products of combustion become disseminated
and absorbed, and a perfect circulation of Water obtained, so that the different parts of
the boiler are sustained at practically the same temperature and the steam as generated
is more quickly conveyed to the steam space. For this purpose I arrange any
suitable number of Tubes in the flue or flues of such boilers, one end of same being
sitnated over the furnace, and the Tubes then continued along the flue to near the
other end of the boilers. The tubes are placed longitudinally side by side in rows
and preferably staggered" in relation to each other, that is to say the tubes in one
row are opposite the spaces left between those of the adjacent rows, and such tubes are
more or less inclined from the horizontal, and are fixed at both ends in hollow boxes
or casings.
<<
In the case of horizontal boilers the ends of the Tubes over the fire-bars are placed
near the top of the flue, and slant downwards as they proceed along same, so that their
further ends are situated near the bottom of the flue.
In the case of vertical boilers the ends of the tubes nearest the fire bars are placed
near one side of the flue, and the tubes then slant across such flue towards the opposite
side and upper end of same.
It will be seen therefore that the tubes form a kind of diagonal partition arranged
along the whole of the greater part of the length of the flue, so that the flames and
products of combustion from the furnace come in contact with and pass around
and are desseminated among the Tubes on their way through the flue, thereby
efficiently heating the tubes in their passage.
The whole of the tubes are at one end connected to a box or casing com-
municating with the water space of the boiler near one end of same, and at the
other end such tubes are connected to a similar box or casing communicating with
the water space near the other end of the boiler so as to allow free passage for the
water to and from the tubes and thus ensure a complote and efficient circulation of
the water.
It is preferable to make the boxes or casings project into the flue, and also to so
form them that at their point of connection with the shell of the flue a certain amount
of flexibility will be allowed whereby suitable provision will be made for the expansion
and contraction of the tubes due to any variations in the temperature of same through-
out their length, for this purpose the boxes or casings will be preferably formed of
malleable cast steel and their width at their point of connection with the shell of the
flue be less than the width of the part into which the tubes are inserted.
In the case of Vertical Boilers the top ends of the tubes may pass through the crown
plate of the fire box directly into the water space above, the crown plate being preferably
bent downwards where the tubes enter same, so as to bring such part parallel with
the top plate of the box or casing into which the bottom ends of the tubes enter, and

page_text: such bottom box or casing is preferably built into the fire box from the bottom of the
water space and opposite the fire door.
In short boilers such as Locomotive and marine the front ends of the tubes may
pass through the front plate of the fire box directly into the water space between it
and the outer shell of the boiler, and the rear ends be connected to a box or casings
arranged in the smoke box and communicating with the water space at that end of
the boiler.
This invention is applicable to existing Marine, Cornish Lancashire, Vertical and
Locomotive Boilers as well as adapted to new boilers to be constructed.
Fig. 1 of the accompanying drawings is a front elevation of a Cornish or single
flue boiler shewing the casings as fitted to the flue over the fire bars with the doors
on the outside to facilitate the securing of the tubes in the back plate, also shewing
the relation of the tubes to each other, each door being opposite a tube and the fire
bars being removed shewing the back casing attached to the bottom of the flue at A.
Fig. 2 is a longitudinal section through B C shewing the arrangement of the
tubes D slanting downwards and passing from the front casing E communicating
with the water space over the fire bars at F to the back casing G and communi-
cating with the water space at the bottom of the boiler at H it will be thus seen that
the water in the tubes becoming heated, will rise in the direction of the arrows and
be followed by the colder water from the bottom, setting up the desired circulation, in
some cases I prefer to carry the tubes through the flue and connect the casings with
the front plate near the water line as shewn in Fig. 7. K is a deflecting plate so placed
as to form a combustion chamber and to deflect the heated gases between the tubes
before passing to the outside flues.
Fig. 3 is a longitudinal section of a Locomotive boiler shewing the tubes A passing
from the front water space to the casing B in the smoke box which is connected with
the water space by suitable tubes CC either below or above the flue as shewn in
Fig. 5 which is an end view inside the smoke box.
Fig. 4 is a section through D F.
Fig. 6 is a front elevation of a Marine boiler shewing the casings A A attached to
one or more vertical tubes B B B B which communicate with the water space
at CCC C in the front plate of the boiler.
Fig. 7 is a section through D E shewing the tubes F passing from the front
casing A to the back plate of smoke box at G or if preferred to a back casing as
described in Fig. 2.
Fig. 8 is a section of a vertical boiler shewing the tubes A passing between the
casing B to the deflected crown plate C through the flue forming the partition and
Fig. 9 is a section through D E shewing the relation of the tubes to each other in the
crown plate.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed I declare that what
I claim is
Firstly. The use and employment of Tubulous or any internally fired boilers such
as Cornish Lancashire Vertical Marino and Locomotive having longitudinally inclined
water tubes preferably staggered and side by side in relation to each other placed in
the furnaces and flues thereof, thereby setting up a complete circulation of the water
as herein before described and substantially as set forth in the accompanying drawings.
Secondly. The general combination and arrangement of the water tubes, boxes or
casings, and their connections to the boilers as hereinbefore described and in the
aforesaid drawings.
Dated this 5th day of Sentember 1887