Year: 1896

page_text: I, STEPHEN ALLEY, of the Sentinel Works, Polmadie, in the County of
Glasgow, North Britain, Engineer, do hereby declare the nature of this invention
to be as follows, that is to say :-
My said invention comprises an improved construction of steam boiler suitable
for high or other pressures, and which whilst securing efficiency, has compactness
with accessibility of all parts, and other advantages.
A boiler made according to my invention comprises a number of sections of a
vertical flat form, each section consisting of a rectangular arrangement having
two header or end pipes connected by numerous tubes, and being placed with
one diagonal vertical. Two sets of the sections are combined in one boiler with
their horizontal diagonals in one line, and present angular spaces above and below,
in the latter of which the furnace is placed. In one modification the tubes are,
in each set or wing, placed parallel to the outer lower side and the inner upper
side of the rectangle; or they may be placed at right angles to those sides;
in all cases, however, all the tubes of a set of sections are parallel to each other
whilst the tubes of one section are placed opposite the spaces between the tubes
of the adjacent sections. The fire gases from the furnace pass from the inner
end in two streams from back to front through and amongst the tubes of the
two sets of sections, and from the front enter the space in the upper angle
between the two sets of sections where they act on one, two, or more steam
drums on their way to the uptake. More than two of the sets of sections may
be arranged in a horizontal row, with furnaces in the lower angular spaces
between the sets.
The tubes are fixed to the header or connecting pipes which are preferably of
approximately square section by being expanded in holes in the pipes, external
holes being formed to admit the expanding tool and being closed by screw plugs,
which are made recessed or hollow when in positions in which they are exposed to
strong heat. The upper header or connecting pipes are separately connected to
the steam drum or drums, and the lower header or connecting pipes are separately
connected to bottom water drums, so that each section of tubes can be detached
whilst leaving the other sections untouched. The downward flow of the water is
provided for by external pipes connecting the steam drum or drums with the bottom
water drums.
Dated this Eleventh day of Fehru 1806
EDMUND HUNT,
Applicant's Agent.

page_text: Improvements in and connected with Steam Boilers.
I, STEPHEN ALLEY, of the Sentinel Works, Polmadie, in the County of
Glasgow, North Britain, 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, that is to say :-
My said invention comprises an improved construction of steam boiler suitable
for high or other pressures, and which whilst securing efficiency, has compactness
with accessibility of all parts and other advantages.
Two modifications of boilers as made according to my invention are shown on
three accompanying sheets of explanatory drawings, Figures, 1, and 2, on Sheet, 1,
thereof being respectively a front and a side elevation of one modification and
Figures, 3, and 4, on Sheet, 2, being respectively a transverse vertical section and
a longitudinal vertical section of the same. Figure, 5, on Sheet, 3, is a transverse
vertical section of a second modification, and Figures, 6, and 7, are views, at right
angles to each other, of details of the same. In these drawings the same reference
letters are used to mark the same or like parts wherever they are repeated.
The modification of my improved boiler, shown in Figures, 1, 2, 3, and 4, of the
drawings comprises a number of sections of a vertical flat form, each section
consisting of a rectangular arrangement having two header or end pipes, A,
connected by numerous tubes, B, and being placed with one diagonal vertical. Two
sets of the sections are combined in the boiler with their horizontal diagonals in
the same horizontal plane, and present angular spaces, F, and C, above and below
in the latter of which the furnace, C, is placed. The tubes, B, in each set or
wing, are placed parallel to the outer lower side and the inner upper side of the
rectangle; or they might be placed at right angles to those sides; in all cases
however all the tubes, B, of a set of sections are parallel to each other whilst the
tubes of one section are placed opposite the spaces between the tubes of the
adjacent sections. The fire gases from the furnace, C, pass from the inner end in
two streams from back to front through and amongst the tubes, B, of the two sets
of sections, and from the front enter the space, F, in the upper angle between the
two sets of sections where they act on two (or it might be one or more than two)
steam drums, D, on their way to the uptake, E. The gases are compelled to take
the course described by brick or other partitions, G, suitably arranged. More
than two of the sets of sections may be arranged in a horizontal row, with furnaces
in the lower angular spaces between the sets.
The tubes, B, are fixed to the header or connecting pipes, A, which are
preferably of approximately square section by being expanded in holes in the
pipes, external holes being formed to admit the expanding tool, and being closed
by screw plugs which are made recessed or hollow, when in positions in which
they are exposed to strong heat. The upper headers or connecting pipes, A, are
separately connected to the steam drums, D, and the lower headers or connecting
pipes are separately connected to bottom water drums, J, so that each section of
tubes can be detached whilst leaving the other sections untouched. The downward
flow of the water is provided for by external pipes, K, connecting the steam
drums, D, with the bottom water drums, J. The steam drums, D, are connected
by short pipes, L, which also act as distance pieces. A metal casing, M, encloses
the parts and it is provided with doors, N, for each set of sections, for the purposes
of examining or cleaning the tubes.
The modification of my improved boiler shown in Figures, 5, 6, and 7, comprises
an improved mode of fixing the headers pipes, A, to the steam drums, B, and water

page_text: drums, J. In this case stools or joint connections, P, shown as being interposed
between the headers pipes, A, and drums, D, and J, in Figures 1, 2, 3, and 4, are
dispensed with and the header pipes are fixed directly to the drums. Facings, Q,
are formed on the drums and the header pipes, A, which are square in section are
fixed to them by stud bolts, R, which pass through distance tubes or pieces, S,
within the header pipes for strengthening purposes. The header pipes, A, are
blind at both ends, communication with the drums, D, and J, being effected through
lateral openings, T. The other parts of this modification are constructed and
arranged similarly to the corresponding parts of the modification previously
described.
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 :-
A steam boiler comprising two or more sets of rectangular sections or elements,
each set of sections being constructed with water tubes parallel to each other, and
arranged, each with one diagonal vertical, and the sets of sections presenting
between them upper and lower angular spaces, respectively for the gases and
furnace or furnaces, and being connected to upper and lower drums, substantially
as and for the purposes hereinbefore described.
Dated this Eleventh day of November 1896.
EDMUND HUNT,
Applicant's Agent.