Improvements in Tubulous Steam Boilers.
Year: 1896

page_text: Date of Application, 13th Mar.. 1896
Complete Specification Left, 20th June, 1896-Accepted. 3rd Oct.. 1896
PROVISIONAL SPECIFICATION.
Improvements in Tubulous Steam Boilers.
I, JOHN JARDINE, of Mayflower Cottage, Motherwell, in the County of
Lanark, Engineer, do hereby declare the nature of this invention to be as
follows:-
My invention has reference to improvements in connection with tubulous or
water tube boilers, the object being to arrange the steam and water drums, mud
drums and the connecting tubes in such a manner as to permit of easy examination
and convenient cleaning or repairs.
In carrying my invention into effect I arrange a boiler when intended for land
purposes with a longitudinal steam and water drum placed at the upper end of
the boiler seating and having beneath it two cross or transverse water drums or
water and mud drums connected therewith by circulating small diameter tubes;
the furnace being arranged preferably at the front end of the space beneath the
upper steam and water drum, and being provided with a fire bridge and inner flue
walls for directing the flame and heated gases between the tubes so that they may
pass in a circuitous manner from the furnace to the flue uptake or outlet.
I arrange my upper steam and water drum preferably with a baffle plate or dividing
screen or screens near the inner end, so that when the feed water which I introduce
into that end through the ordinary perforated supply pipe, is admitted thereto, it
flows downwards through the vertical connecting tubes to the transverse mud drum
lying beneath the longitudinal steam and water drum. I provide uptake tubes
from this mud drum so that the water may pass to the upper main drum and that
it may then flow through other downtake tubes into the first water drum lying at
the rear end of the furnace bars, and from this water drum I also provide an
uptake battery of tubes connected to the main steam and water drum above.
Thus my main upper drum is connected to two lower drums by four ranges of
tubes which serve to keep the water in complete and efficient circulation.
I may preferably arrange my steam and water drum as also the mud drum with
flat instead of circular surfaces or tube plates to receive the tubes, the steam and
water drum having such flat surfaces or tube plates upon the underside, while the
mud drum is provided with such upon the upper side; the shape thereof being
otherwise circular. I may also provide a baffle or division plate upon the
transverse mnd drum to separate inud from the upgoing water.
I attach ordinary mountings to the upper main drum and fittings for taking all
the steam to suit any desired requirement.
I provide air spaces between my main flue walls to assist the heat currents and
to increase combustion. I also regulate the supply of air to the air spaces by
means of a baffle or other door placed in any convenient position.
By this arrangement of construction I am enabled to trap the water and to
isolate the impurities so as to confine all the mud and other precipitated matter in
and near the rear mud drum, which mud drum is in a position convenient of access
and can be readily cleaned and scaled.
When arranging my improved type of boiler for marine purposes I employ a
horizontal upper steam and water drum as before described for my land type
boiler, and I arrange three lower drums in connection with this having small
circulating tubes passing from one to the other. The upper main drum I utilize as

page_text: the steam and water drum and take the feed water therein into the baffle chamber
at one end of the same; and I connect this upper drum by means of a battery of
small tubes to two longitudinal lower drums disposed one on each side of the
furnace space; I also connect a transverse drum which forms the end bar of
bridge at the back of the furnace to the upper drum by means of up and downtake
batteries of tubes, so that the main upper drum is in connection with the three
lower drums although the three lower drums themselves need not necessarily be in
connection one with the other.
I provide air spaces in the flue walls as herein before described for my land
boiler, and I arrange any suitable mountings and fittings upon the upper drum to
suit any particular requirement.
Dated this 13th day of March 1896
MARKS & CLERK,
18, Southampton Buildings, London, W.C., and
13, Temple Street, Birmingham, Agents.
1, JOHN JARDINE, of Mayflower Cottage, Motherwell, in the County of
Lanark, 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 has reference to improvements in connection with tubulous or
water tube boilers; the object being to arrange the steam and water drum overhead
and the mud drums at base with the connecting tubes in such a manner as to permit
of easy examination and convenient cleaning or repairs.
In the accompanying sheets of explanatory drawings-
Figure 1 is a longitudinal sectional elevation, and
Figure 2 is a sectional end elevation showing one form of my improved boiler
suitable for land purposes.
Figures 3 and 4 are similar sectional views of another type of my improved form
of construction suitable especially for marine purposes.
In carrying my invention into effect I arrange a boiler when intended for land
purposes (as shown in Figures 1 and 2) with a longitudinal steam and water drum A
placed at the upper end of the boiler B B and having beneath it two cross or transverse
water drums or water and mud drums C C', connected therewith by circulating
small diameter tubes D D'; the furnace E being arranged preferably at the front
end of the space beneath the upper steam and water drum A, and being provided
with a fire bridge e and inner flue walls el, for directing the flame and heated gases
between the tubes so that they may pass in a circuitous manner from the furnace
to the flue uptake or outlet F.
I arrange ny upper steam and water drum A preferably with a baffle plate or
dividing screen or screens G near the inner end, so that when the feed water which
I introduce into that end through the ordinary perforated supply pipe connection H,
is admitted thereto, it flows downwards through the vertical connecting tubes D to
the transverse mud drum C lying beneath the longitudinal steam and water drum.
I provide uptake tubes D' from this mud drum so that the water may pass again
or return to the upper main drum and that it may then flow through other
downtake tubes D another dividing screen G¹ being provided to facilitate positive
circulation as illustrated, the water thereby passing into the first water drum C
lying at the rear end of the furnace bars, and from this water drum C I also
provide an uptake battery of tubes D' connected to the main steam and water

page_text: drum A above. Thus my main upper drum A is connected to the lower drums CC'
by four ranges of tubes D D D D' which serve to keep the water in complete
and efficient circulation.
I may preferably arrange my steam and water drum as also the mud drum with
flat instead of circular surfaces or tube plates to receive the tubes, the steam and
water drum having such flat surfaces or tube plates upon the underside, while the
mud drum is provided with such upon the upper side; the shape thereof being
otherwise circular. I may also provide a baffle or division plate upon the transverse
mud drum to separate mud from the upgoing water.
I sometimes provide a perforated division plate K in the upper drue A for
assisting the flow of the currents of water therein and for ensuring dry steam
collection.
By this arrangement of construction I am enabled to employ dirty or impare
water, and to trap the water and isolate the imparities so as to confine all the mad
and other precipitated matter in and near the rear mud drum C', which mud drum
is in position convenient of access and can be readily cleaned and scaled and its
tubes can be readily examined or replaced.
I attach ordinary mountings to the upper main drum and fittings for taking off
the steam to suit any desired requirement.
I provide air spaces bb in the main flue walls B B for the admission of air,
which becomes heated and is conducted along the main flue walls and through
channels in the baffle wall B', and issues out behind the front bank of tubes
to assist combustion.
When arranging my improved type of boiler for marine purposes as shown in
Figures 3 and 4, I employ a horizontal apper steam and water drum A as before
described for my land type boiler, and l'arrange three lower drums C³ C³ C* in
connection with this, having small circulating tubes D D' passing from one to the
other. The upper main drum A I utilize as the steam and water drum and take
the feed water therein into the baffle chamber H at one end of the same; and I
connect this upper drum by means of a battery of sinall tubes D to two longitudinal
lower drums C C disposed one on each side of the furnace spare E; I also
connect a transverse drum C2 which forms the end bar or bridge at the back of the
furnace to the upper drum by means of up and downtake batteries of tubes D' so
that the main upper drum is in connection with the three lower drums C2 C3 C+
and although I find it convenient to connect the three lower drums together by
branches L L they need not necessarily be in connection one with the other. This
is a form of boiler 1 may employ for water less dirty than would be used with the
boiler shown in Figures 1 and 2 and is also particularly useful for rapid steam
generation and for high pressures.
I provide division plates K as hereinbefore described as antiprimers, and these
ensure dry steam and I arrange any suitable mountings and fittings upon the
various drums to suit any particular requirement.
In reference to the modification illustrated in Figures 3 and 4, the flue or uptake
to funnel may be arranged according to circumstances.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manuer the same is to be performed, I declare that what I
claim is :-
1. The improvements in tubulous steam boilers substantially as and for the
purposes hereinbefore described and as illustrated in the accompanying drawings.
2. In a water tube boiler, the arrangement of a single upper steam and water
drum provided with smaller flow and return tubes which are in communication with
two lower water and mud drums; the water tubes and lower drums being enclosed
by walls or casing containing a furnace from which the hot gases and flames pass
amongst the tubes to the chimney uptake or outlet substantially as hereinbefore
described and as illustrated in Figures 1 and 2 of the accompanying drawings.
3. In a water tube boiler, arranging a single upper steam and water drum which

page_text: is connected by means of smaller tubes with the three lower mud and water drums
and having a furnace arranged and formed between the lower drums, substantially
as herein before described and as illustrated in Figures 3 and 4 of the accompanying
-drawings.
1000
MARKS & CLERK,
18, Southampton Buildings, London, W.C., and
13, Temple Street, Birmingham, Agents.
MARKS & CLERK,
18, Southampton Buildings, London, W.C., and
13, Temple Street, Birmingham, Agents.