Improved Construction of Steam Generator or Boiler.
Year: 1892

page_text: Date of Application, 10th Sept., 1892
Complete Specification Left. 10th July, 1893-Accepted. 12th Aug.. 1893
PROVISIONAL SPECIFICATION.
Improved Construction of Steam Generator or Boiler.
I, JOHN HAWLEY of 3 Barnaby Street, Clayton Lane, Openshaw, Manchester,
Engineer, do hereby declare the nature of my said invention to be as follows :-
These improvements relate to the construction of steam boilers or generators more
particularly of the type known as the "water tube" or "sectional" in which a
very large amount of heating surface is obtained within a small compass and in
which a very high pressure of steam is obtainable with safety.
My improvements have for their object to increase the durability and steam
producing properties of this class of boiler or generator and consist essentially of
a series of spiral coils of-by preference-steel pipes or tubes arranged side by side
along the length of a set of steam and water drums and in a vertical, angular or
other suitable position and which coils are connected at one of their extremities to
the water drum and at their other extremities to the steam drum.
The boiler is fitted with a suitable furnace and a fire brick wall or partition is
arranged between each set of coils to deflect the heated products of combustion on
their way to the flue and thus to utilise them to the fullest extent.
The coils are made some eight or nine feet in length and say one foot in diameter
and eight or ten of said coils may be arranged in a row. A row of the said coils
are arranged at each side of the water and steam drums and a row of said coils
extend between the two drums making three rows in all, the lower extremities of
the central coils being caused to extend to the bottom of the water drum.
The bore of the tubes of the central coils may be larger than the bore of the
tubes of the side coils so as to promote the circulation of the water.
The ends of the coils are provided with flanges and are connected to the drums
below the water line either by electric welding, rivetting or by any other suitable
means.
The foregoing arrangement of coils and drums is supported and enclosed or
partially enclosed in a casing of brickwork with suitable flues to allow of the proper
circulation of the hot gases or products of combustion.
To further promote circulation of the water the lower drum may be slightly.
inclined from the furnace end downwards.
Dated this 9th day of September 1892.
JOHN G. WILSON,
Agent for the Applicant.
COMPLETE SPECIFICATION.
Improved Construction of Steam Generator or Boller.
I, JOHN HAWLEY, now of 23, Neden Street, Clayton Lane, Openshaw, 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 :-
These improvements relate to the construction of steam boilers or generators
more particularly of the type known as the "water tube" or "sectional" in which
a very large amount of heating surface is obtained within a small compass and in
which a very high pressure of steam is obtainable with safety.
My improvements have for their object to increase the durability and steam
producing properties of this class of boiler or generator and consist essentially of a
series of spiral coils of, by preference, steel pipes or tubes arranged side by side
along the length of a set of steam and water drums and in a vertical, angular or
Pic 871

page_text: other suitable position and which coils are connected at one of their extremities to
the water drum and at their other extremities to the steam drum.
And in order that my invention may be more fully understood I have caused
to be appended hereunto one sheet of drawings marked with letters of reference
indicating like parts in the various figures.
Fig. 1 is a side view and Fig. 2 an end view, with brickwork in section, of a
steam generator constructed in accordance with my invention as used for land
purposes.
Fig. 3 is partly a side view and partly a longitudinal section and Fig. 4 a
sectional end view of a steam generator or boiler constructed in accordance with
my invention for marine purposes.
In carrying out my invention and referring to the figures generally, a are the
series of spiral coils of pipes or tubes, preferably made of steel and arranged side
by side along the length of a set of steam and water drums & c respectively, two
rows of straight water pipes or tubes & being arranged between the said coils to
communicate between the drums & c in the case of land boilers, Figs. 1 & 2,
which serve to increase the circulation of water and the heating surface.
The coils a may be arranged in a vertical, angular, or other suitable position and
are connected at one of their extremities to the steam drum band at their other
extremities to the water drum c. The coils a are made some eight or nine feet in
length and say one foot in diameter, and seven, eight or ten may be arranged in
one row. A row of the said coils are arranged at each side of the steam and water
drums&c respectively, and a row of the said coils extend between the two
drums &c and the first named two rows of coils making three rows in all, the
lower extremities of the central coils a being caused to extend to the bottom of the
water drum c when no flue is used.
The hore of the tubes of the central coils may be larger than the bore of the
tubes of the side coils so as to promote the circulation of the water.
The ends of the coils are provided with flanges a¹ and are connected to the
drums &c below the water line either by electric welding, rivetting or by any
other suitable means.
The boiler described and shown in Figs. 1 & 2, is fitted with a suitable furnace e
and a fire-brick wall or partition is arranged between each set of coils a to deflect
the heated products of combustion on their way to the flue and thus to utilize them
to the fullest extent.
The foregoing arrangement of coils a and drum c & c is supported and enclosed
or partially enclosed in a casing of brickwork g and for marine purposes, Figs. 3
& 4, in an iron casing, with suitable flues to allow of the proper circulation of
the hot gases or products of combustion.
To further promote circulation of the water the lower drum c may be slightly
inclined from the furnace end downwards, as shown in the drawings.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what I
claim, is―
In steam generators or boilers, the combination of rows of tubular water
circulation coils a with a steam drum and a water drum c positioned above each
other, the coils a being employed on the sides of and between the steam and water
drums &c, the upper coil extremities communicating with the steam drum band
the lower coil extremities with the water drum c, substantially as and for the
purpose set forth.
Dated this 8th day of Tul 1802
F. BOSSHARDT & Co.,
4, Corporation Street, Manchester, Agents to Applicant.