IMPROVEMENTS IN BOILERS FOR STATIONARY AND OTHER STEAM ENGINES
Year: 1884

page_text: I, WILLIAM HAYES, of 10 Ripon Street Lincoln, Lincolnshire, Boiler Maker, do
hereby declare the nature of my said Invention for "IMPROVEMENTS IN BOILERS
FOR STATIONARY AND OTHER STEAM ENGINES," and in what manner the same is
to be performed, to be particularly described and ascertained in and by the
following statement that is to say :—
My said Invention has for its object the improved construction of boilers for
generating steam for stationary, marine, or other steam engines whereby a greater
heating surface is gained in such boilers, and by so forming the boiler that stays
are dispensed with, greater strength is obtained accompanied with economy of
construction.
In carrying out my said Invention the shell of the boiler containing the furnace
tubes is formed as usual of a cylindrical shape as far as the furnace end of the
tubes, at which end the outer cylindrical shell is formed as it were obliquely so
that the upper part of the shell extends beyond the furnace tubes to a part in a
line with the front of the furnace whilst the lower or under side of the shell does
not extend quite to the furnace end of the tubes. To this obliquely formed end of
the boiler there is attached a similarly obliquely formed end of another cylindrical
shell which forms the external covering of the furnace space and contains the usual
fire bars, the whole thus forming two cylindrical shells joined together at a right
angle or in other words a horizontal and vertical cylindrical shell joined together
by an elbow joint.
And in order that my said Invention and the manner of performing the same
may be properly understood I hereunto append a sheet of explanatory drawings to
be hereinafter referred to and representing my improved arrangement of steam
boilers. In these drawings the same reference numerals are used to mark the same
or like parts wherever they are repeated.
Figure 1 on the accompanying sheet of drawings represents a longitudinal
section of my improved boiler, figure 2 being a sectional plan, and figure 3 a
vertical section taken through the furnace space. The cylindrical shell 4
containing the furnace tubes 5 and the chimney end 6 are constructed in the
ordinary manner except that the shell at the end nearest the furnace is formed
with an enlargement 7. Over this enlargement 7 there is rivetted the edge of a
cylindrical shell 8. This shell 8 extends over at the top part of the boiler and
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page_text: covers the space for the furnace and has a downward flange 9 formed at this end
whilst at the bottom part of the boiler the shell 8 is only of sufficient width
so that the flange 9 forms an angle piece sufficient for rivetting purposes.
A cylindrical shell 10 placed with its axis vertical and having its upper end
formed obliquely is rivetted at its oblique end to the flange 9 the flange
overlapping and securing the shell 10 so that the bottom part of the shell 4, and
the shortest side of the cylindrical shell 10 are at right angles to one another.
The furnace tubes are fitted in the ordinary manner to a furnace plate 11 and this
plate is flanged and has rivetted over its flange the edges of a cylindrical piece 12
which forms the sides of the furnace and in which piece 12 there is a portion of its
sido cut away to correspond to and admit the plate. The bottom edge of this
piece 12 has a curved flange by which it is rivetted to the bottom edge of the
shell 10 leaving sufficient water space all round between the outer shell 10 and the
piece 12. A dishod crown plate 13 is fitted over the furnace space and the
piece 12 is rivetted outside to the flange on the crown plate this flange extending
round the side of the crown plate 13 until it reaches the furnace and tubes
plate 11.
At this part there is no flange and the edge of the crown plate 13 is
rivetted on over the flange of the plate 11. The furnace door 14 is formed in the
front or longest side of the shell 10 and in the piece 12 these two parts being
connected together round the space forming the door. Passing across the furnace,
space transversely to the furnace tubes there is a Galloway tube 15 and also two
tubes tapped through the piece 12 at one of their ends their other ends being
welded and each connected by a tube to the space above the crown plate 13 and
below these tubes there are fitted the usual fire bars 16, fitted to a ring held by
short studs at the bottom of the shell 10 and is provided with suitable doors for
regulating the draught and for removing the ashes. The usual man holes are
formed in the shell 8 and holes in the shell 10 for the removal of mud or sediment.
By the foregoing improvements it will be seen that with the exception of the
furnace tubes which act as stays there are no stays required throughout the boiler
whilst by forming the component parts of the boiler of a cylindrical form with
suitable flanges for rivetting, the improved boiler will be of equal if not superior
strength to ordinary boilers. At the same time also a heating surface is gained
at least equal to 11 H.P. greater than can be obtained with the boilers at
present in use. By the improved form of boiler free expansion of the plates is
allowed and a more perfect circulation of the water in the boiler is obtained.
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 forming of the furnace end of steam boilers of cylindrical pieces so fitted
together that stays are dispensed with substantially as hereinbefore described and
shown in the accompanying drawings.
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