Improvements in and connected with Water Tube Steam Generators.
Year: 1898

page_text: Date of Application, 24th Dec., 1898-Accepted, 28th Jan.,
1899
COMPLETE SPECIFICATION (AMENDED).
Improvements in and connected with Water Tube Steam Generators.
We, JOHN JOSEPH TINKER, of Daisy Field Boiler Works, Hyde, in the County
of Chester, Boiler-maker, and WILLIAM PAUL JAMES FAWCUS, of 78, King
Street, Manchester, in the County of Lancaster, 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:-
This invention relates to improvements in water tube steam generators and has
for its object to obtain a better combustion of fuel and circulation of water.
greater efficiency, compactness, durability, economy in fuel and facility of
cleaning.
And in order that our invention may be more fully understood we have caused
to be appended hereunto one sheet of drawings marked with letters of reference
indicating like parts in the various figures, Fig 1 being a longitudinal section
of our improved furnace and steam generator and Fig. 2 a cross section at
line A-A of Fig 1
In carrying out our invention and referring to the figures generally, we employ
inside a chamber a of brick work a series of water tubes b inclined from the rear
to the front and connected together at their ends by boxes. hollow sockets or
headers c.
To the lower or inlet end of the said series of tubes we connect, by means of
suitable pipes d, a mud drum e and to the upper or outlet end by pipes d¹ a
steam drum f The said mud and steam drums are connected together at each
end by means of pipes g
Between the end plates and in the centre of the steam drum f an auxiliary
drum is secured forming a hollow stay for the ends of the drum f and being
formed with perforations acting also as feed water inlet and water purifying
chamber being always half full of feed water
The feed water is admitted at one end of the drum f' whilst the other end is
formed with a man hole.
The furnace his arranged in front, below the said series of water tubes and
extending from the front of the chamber a to the lower part of the said tubes, 18
covered in, so as to prevent the cold air, which enters the furnace when the
furnace door 18 opened, striking and thereby chilling the said series of water
tubes The back end of the furnace h we form with a short flue i, the top of
which is built against the underside of the said series of tubes and the top of
the latter we cover with fire bricks which covering reaches from the lower end
of the said series of tubes to a wall formed between the same.
It will thus be seen that the hot gases from the furnace h must first pass through
the covered part of the said series of tubes and being temporarily retained, they
are caused to diffuse amongst and impinge upon the series of tubes where the
water is the coldest after which they return into the chamber a and having

page_text: passed through the upper or uncovered part of the said series of tubes, partially
envelope the steam drum f as indicated by the arrows
The position of the steam drum f relative to the upper end of the said series
of water tubes is such that the latter never fills, thus confining the circulation of
water to the series of water tubes and obtaining a steady water level in the
steam drum f
A modification of our invention consists in connecting to the upper or outlet end
of the said series of tubes a drum similar to that connected to the lower or inlet
end, which drum may be either connected directly to the aforesaid steam drum or
indirectly by interposing between the said drums one or more other steam
di ums
To facilitate cleaning and repairing in case where the place in which the
generator 18 employed does not allow of ready access to the said series of tubes,
the furnace may be arranged so as to allow of being readily withdrawn whilst
the lower end of the said series of tubes may be mounted upon pivots to permit
of lowering the said sees of tubes into a position suitable for cleaning or repau-
ing when required and in such cases the steam connections and down pipes may
be bolted joints
Having now particularly described and ascertained the nature of our said
invention and in what manner the same 18 to be performed, we are aware that
in water tube steam generators it is old to make use of inclined water tubes,
headers connecting the ends of such tubes, and transverse steam drums and we
declare that what we claim is.-
1st. In and connected with water tube steam generators, the general construc-
tion and combination of parts constituting our improvements operating sub-
stantially as and for the purpose set forth
2nd In combination, a furnace h and a series of water tubes 6 arranged inside
a chamber a, the said furnace being covered from end to end and the said
series of water tubes from their lower to near their upper end, and the latter
formed with a wall 7, whereby the hot gases from the furnace ale temporarily
confined and diffused amongst the lower part of the said series of tubes, all sub-
stantially as and for the purpose set forth.
3rd In combination with a funace and a series of inclined water tubes inside
a chamber as specified in the preceding claim, a steam drum so positioned that
the upper end of the said series of water tubes never fill with water, all sub-
stantially as and for the purpose set forth
4th The steam drum formed with an internal auxiliary drum f serving as
a stay for the ends of the drum f and as feed water inlet and water purifying
chamber, all substantially as set forth
Dated this 23rd day of December 1898
F BOSSHARDT & Co,
4, Corporation Street, Manchester,
Agents to Applicants