Improvements in Steam Boilers.
Year: 1895

page_text: Date of Application, 27th May, 1895
Complete Specification Left, 3rd Jan., 1896-Accepted, 14th Mar., 1896
Improvements in Steam Boilers.
We, JAMES PATTERSON, of 67 Landressy Street, Bridgeton, in the County of
the City of Glasgow, North Britain, Engineer, and JAMES RAMSAY SANDILANDS,
of 141 West George Street, Glasgow, North Britain, Insurance Manager, do hereby
declare the nature of our invention to be as follows:-
The present invention relates to improvements in steam boilers and is principally
applicable to boilers for marine purposes, the object being to secure a maximum
heating surface in a minimum space and with a minimum weight.
The invention consists essentially in the combination of a fire-tube, or multi-
tubular, boiler with two water drums or cylinders, the upper part of the fire-tube
boiler being connected to the upper part of each of the water drums or cylinders by
a series of tubes, constituting a tubular boiler, while the lower part of such fire-tube
or multitubular boiler is connected to the upper part of each of the water drums
or cylinders by circulating tubes.
The fire-tube boiler is placed over the furnace, while the water drums or cylinders
are placed one on each side of same, and protected from the heat of such furnace,
whereas the tubes constituting the tubular boiler are exposed to the heat of such
furnace.
The gaseous products of combustion may pass to a collecting box or chamber for
the fire tubes of the fire-tube boiler by passages or flues communicating with the
upper part of such collecting box or chamber, and thence pass through the fire tubes
to a smoke box at the opposite end of the fire-tube boiler, and thence to the chimney
or uptake. Or the gaseous products of combustion may pass directly from the rear
end of the fire box into the underside of the collecting box or chamber of the
fire-tube boiler, and thence through the fire tubes of same to the smoke box and
i ptake.
Dated thie 23rd day of May 1895.
ALLISON BROS.,
Agents for the Applicants.
Improvements in Steam Boilers.
We, JAMES PATTERSON, of 67 Landressy Street, Bridgeton, in the County of
the City of Glasgow, North Britain, Engineer, and JAMES RAMSAY SANDILANDS,
of 141 West George Street, Glasgow, North Britain, Insurance Manager, 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:-
The present invention relates to improvements in steam boilers and is principally
applicable to boilers for marine purposes, the object being to secure a maximum
heating surface in a minimum space and with a minimum weight.

page_text: The invention consists essentially in the combination of a fire-tube or multi-
tubular boiler with two water drums or cylinders, the upper part of the fire-tube
boiler being connected to the upper part of each of the water drums or cylinders
by a series of tubes, constituting a tubular boiler, while the lower part of such fire-
tube or multitubular boiler is connected to the upper part of each of the water
drums or cylinders by circulating tubes.
The fire-tube boiler is placed over the furnace, while the water drums or cylinders
are placed one on each side of same, and protected from the heat of such furnace,
whereas the tubes constituting the tubular boiler are exposed to the heat of such
furnace.
The gaseous products of combustion may pass to a collecting box or chamber for
the fire-tubes of the fire-tube boiler by the passages or flues in which the tubes
constituting the tubular boiler are arranged, and which passages or flues at their
rear ends open into such collecting box or chamber, and thence pass through the
fire-tubes to a smoke box at the opposite end of the fire-tube boiler, and thence to
the chimney or uptake. Or the gaseous products of combustion may pass directly
from the rear end of the fire box into the underside of the collecting box or chamber
of the fire-tube boiler, and thence through the fire-tubes of same to the smoke box
and uptake.
But in order that our invention may be fully understood we will proceed to describe
same by the aid of the accompanying drawings which illustrate a suitable method
of applying such invention to a marine boiler.
In the drawings,
Fig. 1 is a longitudinal section of the boiler,
Fig. 2 a transverse section through the fire-tube boiler and water drums.
Fig. 2 a transverse section through the collecting box or chamber, and Fig. 3
an end elevation of same.
Fig. 4 is a longitudinal section of part of one end of the boiler, showing a slight
modification of the connection between the fire box and the collecting chamber for
the fire-tubes.
Fig. 5 is a side elevation and Fig. 6 an end elevation on a reduced scale of a boiler
constructed according to our invention having a fan for producing a forced draught
applied thereto.
A is the fire-tube or multitubular boiler, a being the fire-tubes thereof. This
boiler A is placed over the furnace B, while on each side of the latter and
arranged so as to be protected from the heat thereof is a water drum or
cylinder C.
The upper part of the fire-tube boiler A is connected to each of the water
drums C by a series of tubes D constituting a tubular boiler which is exposed
to the heat of the furnace B, and the lower part of such boiler A is connected to
the upper part of the water drums C by circulating tubes E.
The water tubes D at their top ends open into the upper part of the drum or
cylinder of the fire-tube boiler A opposite a baffle plate X so as to prevent priming
taking place.
In the arrangement illustrated in Figs. 1, 2 and 3 the gaseous products of combus-
tion pass from the furnace B to a collecting box or chamber F of the fire-tubes a of
boiler A, thence through.the tubes a to the smoke box H at the other end of the
boiler A and so to the funnel or uptake I.
In the modification illustrated in Fig. 4 the rear end of the fire box is con-
nected to the underside of the collecting box or chamber F, so that the products
of combustion pass directly to the latter, and thence through tubes a of boiler A
to the smoke box H and funnel or uptake I as in the previous arrangement.
In the arrangement shown in Figs. 5 and 6 the improved boiler has a fan J driven
by any suitable motor K applied thereto, so as to produce a forced or induced
draught when required. This fan draws the gaseous products of combustion of the
furnace from the top of the smoke box H into such fan where they are preferably
treated with water or other suitable liquid so as to condense same. The fan

page_text: delivers the gases to the receiver L where the condensed substances collect and can
be removed through the outlet M, while the gases are delivered into the funnel or
uptake I above a damper N arranged therein.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is :-
The combination of a fire-tube or multitubular boiler arranged above a furnace
and provided with a collecting box or chamber connected with the fire box thereof,
and of two water drums or cylinders arranged one on each side of the furnace but
so as to be protected from the heat thereof, the upper part of the fire-tube boiler
being connected to the upper part of each of the water drums or cylinders by a
series of tubes exposed to the heat of the furnace, and constituting a tubular
boiler while the lower part of such fire-tube boiler is connected to the upper part
of each of the water drums, or cylinders by circulating tubes, all substantially as
specified.
Dated this 3-d dow of January 1896
ALLISON BROS.,
Agents for the Applicants.