BOILERS FOR HOT WATER APPARATUS BATHS DIGESTERS AND THE LIKE PURPOSES
Year: 1886

page_text: Purposes..
ROBERT ROBSON, Town end Low Wortley Leeds, Boiler Maker, do hereby
declare the nature of my invention for BOILERS FOR HOT WATER APPARATUS
BATHS DIGESTERS AND THE LIKE PURPOSES to be as follows:-
The boiler is constructed with one or more centrally placed fire tubes preferably
of a conical form and surrounded by an anulus of water through which pass tubes
for conveying the hot products of combustion, to an anular flue or chamber under
the boiler whence they pass by a flue outside and completely surrounding the shell
of the boiler to an outlet communicating with a chimney. A dished cover provided
with an inverted cone centre lays over the top of the fire tube and the down
draught auxiliary tubes. The inverted cone is provided with an opening concentric
with the fire tube and which may be closed with a spherical cover and through
which fuel is introduced to the fire tube.
3
1

page_text: Fig. 1 is a front elevation. Fig. 2 a transverse section through A B Fig. 1 and
Figure 8 a sectional plan through C. D Fig. 1.
The outer shell of boiler is shewn at a and is provided with an inner shell 6
secured to the outer shell at c.
The fuel is supplied to the fire through an opening e which may be closed or
covered by the lid f, and a fire is supported on the grate bars g, over which is a
central flue h.
The water space is shewn at i and instead of the heat and products of com-
bustion passing direct from the flue h to the chimney j, I provide a number of
vertical tubes which I pass through the water space i. These form a passage for
the heat and products of combustion from the upper part of boiler / through the
water space to lower part of boiler m, thence upwards between the outer and
inner case, away to the chimney j in the direction shewn by arrows.
It will be readily seen that the heat from the furnace and products of com-
bustion have to travel a long distance in contact with the inside case forming the
water space before arriving at the outlet, consequently there is very little waste of,
heat, the same being utilized for bringing the water to the required degree of
temperature.
I provide an opening n at the bottom of the boiler through which the fire may
be raked or cleansed when necessary, this opening may be closed at pleasure by any
suitable door.
Other openings o may be provided at the bottom for the inlet of air and may be
covered or closed when required by any suitable dampers or doors.
Inlet pipe p and outlet pipe q are provided for proper circulation of water and
supply thereof to pipes connected therewith for heating churches, schools and other
places, also for baths, digestors and the like purposes.

page_text: The above boiler may be made of iron, steel or copper, and of any size to suit
the purpose or purposes for which it may be required.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is:-
The arrangement, construction and combination of the various parts forming the
boiler for heating water for warming churches, schools and other places, also for
baths, digestors and the like purposes, substantially as herein set forth.
J. W. HARDING,
Agent.