Improvements in Locomotive Boilers.
Year: 1891

page_text: Date of Application, 2nd Mar., 1891
Complete Specification Left, 24th Nov., 1891-Accepted, 24th Dec., 1891*
PROVISIONAL SPECIFICATION.
Improvements in Locomotive Boilers.
I FRANCIS WILLIAM WEBB of Crewe in the County of Chester Mechanical
Engineer do hereby declare the nature of this invention to be as follows:-
The object of my invention is to place a combustion chamber, with suitable tube
plates, in the barrel of the boiler, between the firebox & smokebox tube plates, so
as to divide the tubes in the boiler into two lengths.
This combustion chamber is made of iron, steel or other suitable metal, & access
to it is obtained through a manhole which may be fixed in any suitable position,
preferably at the bottom, & to this manhole the combustion chamber is fixed, the
remaining portion being left free for expansion & contraction & to allow for free
circulation of the water from one part of the boiler barrel to another; any flat
surface in the chamber can be stayed in the usual manner.
Into this combustion chamber I sometimes place one or more circulating tubes,
so as to more completely circulate the water in the boiler & so avoid undue strains
from unequal expansion & contraction.
A lid is fixed to the manhole so as to get rid, from time to time, of the ashes
which may accumulate in the chamber. I also sometimes fix in the chamber a
steam pipe connected with the steam space of the boiler, & controlled by a cock, so
that by admitting steam into the chamber, I can blow out the soot &. dirt which
accumulate from time to time in the tubes.
OL
1001
COMPLETE SPECIFICATION.
Improvements in Locomotive Boilers.
1, FRANCIS WILLIAM WEBB, of Crewe, in the County of Chester, Mechanical
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 :-
The object of my invention is to place a combustion chamber, with suitable tube
plates, in the barrel of the boiler between the firebox and smokebox tube plates,
so as to divide the tubes in the boiler into two lengths. This combustion chamber
is made of iron, steel or other suitable metal, and access is obtained to it through a
manhole which may be fixed in any suitable position, preferably at the bottom, and
to this manhole the combustion chamber is fixed, the remaining portion being left
free for expansion and contraction and to allow for free circulation of the water
from one part of the boiler barrel to another; any flat surface in the chamber can
be stayed in the usual manner. Into this combustion chamber I sometimes place
one or more circulating tubes, so as to more completely circulate the water in the
boiler and so avoid undue strain from unequal expansion and contraction.
A lid,
door or valve is fixed to the manhole so as to get rid, from time to time, of the
ashes which may accumulate in the chamber.
I also sometimes fix in the chamber a steam pipe connected with the steam space
of the boiler and controlled by a cock so that by admitting steam into the chamber,
I can blow out the soot and dirt which accumulates from time to time in the
tubes.
Fig. 1 is a longitudinal elevation in section of a locomotive boiler having my
invention.applied to it, and.

page_text: Fig. 2 is a transverse section of the boiler through the barrel and the applied
combustion chamber.
The boiler illustrated is of an ordinary locomotive type in which a, is the
ordinary fire-box; a¹, the opening for the furnace door; 6, the manhole above the
fire box, that under the barrel part, of the boiler;, the steam dome.
c, is the combustion chamber within the barrel part of the boiler. It has a man-
hole formed by preference on its underside and it is by the ring round this manhole
and the hole in the barrel b, of the boiler, that the combustion chamber c, is secured
to the barrel of the boiler.
The flat top of the combustion chamber is secured by stays c', to angles rivetted
to the upper part of the barrel of the boiler.
There is a conical tube c², extending downwards from the manhole the lower end
of which tube is closed by a conical valve e³, jointed to one end of a lever c¹, on a
fulcrum, carried on a bracket from the tube e, the cone valve e, being kept
against the opening at the lower end of the tube to close it by a weight c, on the
other end of the lever.
This lever c, can be operated by hand or by connections coming to any con-
venient point, or by a handle on the foot plate of the locomotive, so that dirt and
ashes collected in the conical tube ², may be allowed to fall out when required.
There is a tube plate at each end of the combustion chamber c, and flue- tubes d,
extend between the tube plate a³, of the fire box a, and one tube plate, and between
the other tube plate in the combustion chamber and the tube plate 6, at the smoke-
box end of the boiler.
There is or may be one or more pipes e, in the combustion chamber c, one end of
each pipe being connected steam tight with the lower part of one tube plate, the
other end of the pipe being jointed with and passing through the crown and at the
opposite side of the combustion chamber, its upper end having a bent continuation e',
above the combustion chamber, so that the heat acting upon this pipe or these
pipes e, will cause the water to pass from the lower part of the barrel of the boiler
on one side of the combustion chamber and be discharged at the upper part of the
barrel of the boiler on the other side of the combustion chamber and thus promote
the circulation of the water in the boiler.
Instead of one end of the tube or tubes e, passing through the crown of the
combustion chamber C, it may pass through the tube plate or any other convenient
part of the combustion chamber c.
In some cases I combine with the combustion chamber c, a tube f, passing
through the crown of the combustion chamber, having two branches and a
rose
at the end of each branch, so that steam escaping from the branches will be
discharged towards the open ends of the flue tubes, and thus soot and ashes may be
blown therefrom when required.
The pipe, for steam above the combustion chamber forms a junction with the
casing, of a cock or valve secured steam tight in the barrel of the boiler and in
this casing there are small holes that come within the steam space in the boiler
which when the cone or valve is opened will allow the steam to pass from the
boiler to the cock or valve and from it to the pipe leading to the blow off branches
within the combustion chamber.
The steam cock or valve for the pipe f, may be arranged if desired to be
actuated from the foot plate of the engine.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is.
1. In locomotive boilers the combination of a combustion chamber within the
barrel part of the boiler, such combustion chamber being connected up by flue
tubes with the fire box and smoke box, substantially as hereinbefore described and
illustrated by the drawings.
2. In locomotive boilers the combination of a combustion chamber within the

page_text: barrel of the boiler, connected by flue tubes with the fire box and smoke box and
having an outlet for the discharge of soot and ashes, closed by a valve or door,
substantially as hereinbefore described and illustrated by the drawings.
3. In locomotive boilers the combination of a combustion chamber within the
barrel of the boiler connected by flue tubes with the fire box and the smoke box
and with one or more tubes for circulating the water in the boiler substantially as
herein before described and illustrated by the drawings.
4. In locomotive boilers, the combination of a combustion chamber within the
barrel of the boiler connected by flue tubes with the fire box and smoke box and
having a steam pipe or pipes within the combustion chamber for blowing soot and
ashes from the flue tubes substantially as hereinbefore described and illustrated by
the drawings.
5. The combination in locomotive boilers of a combustion chamber connected by
flue tubes with the fire box and with a circulating pipe or pipes and a steam blast
for blowing soot and dirt out of the tubes substantially as herein before described
and illustrated by the drawings.
6. The combination in locomotive boilers of a fire box, a combustion chamber
within the barrel of the boiler connected by flue tubes with the fire box and smoke
box, a valved outlet for the discharge of soot and ashes, one or more circulating
pipes, and steam blast pipes for clearing out the flue tubes substantially as herein-
before described and illustrated by the drawings.
Dated this Twenty-third day of November 1891.
PETER J. LIVSEY,
Agent.