Improvements in Bollers for eating
Year: 1899

page_text: Date of Application, 27th Mar., 1899-Accepted, 29th Apr., 1899
Improvements in Bollers for eating
We, THOMAS FLETCHER and JOHN NEIL, Directors, and FLETCHER RUSSELL & Co.,
LIMITED, all of Thynne Street, Warrington, in the County of Lancaster, Gas Apparatus
Manufacturers, 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:―
This invention relates to that class of boilers used for heating and circulating water
through pipes such for example as are used for heating conservatories and other
buildings, and especially to upright boilers of a cylindrical or slightly conical form,
which are usually made of an outer and an inner shell so constructed and bolted
together as to leave a cylindrical or slightly conical water space between the two the
fire being placed inside the inner shell.
The object of this invention is to increase the effective action of boilers of the class
above indicated not only by increasing the heating surface upon which the fuel acts,
but also by forming around the interior of the inner shell a series of vertical channels
or ducts which intensify the draught and thereby draw the flames from the fuel
towards the outside where their action is most effective, instead of their passing
principally up the centre of the furnace as is the case in the boilers as hitherto
constructed.
The manner in which our invention is to be performed or carried into practical
effect will be readily understood on reference to the annexed sheet of drawings and the
following explanation thereof.
Fig. 1 on the drawings is a vertical section, and Fig. 2 a horizontal section on
line A-A of a vertical boiler constructed according to our invention, a being the
external cast iron shell, the internal shell and c the water space between the two.
d is the cast iron base, é the grid which supports the fuel, the top or cover, g the
connection with the flue or chimney, and h the flow or return connections between the
boiler and the circulating pipes,
For the purposes of our invention we cast in one piece with the internal shell 6 a
series of vertical, or nearly vertical ribs 6x (say) about three quarters of an inch in
depth and one inch apart (more or less) extending from top to bottom of the same and
projecting inwards so as to form between them a series of vertical ducts or troughs
which not only prevent the fuel from becoming caked against the interior of the shell
but create a series of vertical draughts all round the fuel whereby the flames are
drawn outwards from the centre of the mass of fuel and caused to act in a continuous
upwards current against the inner side of the water space where the heat is most
effective.
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 with a vertical boiler of the construction indicated of a series of
11. miha muninstine inwardly from the internal shell substantially

page_text: in the manner and for the purposes hereinbefore described and illustrated by the
drawings annexed.
Dated this 24th day of March 1899.