Year: 1894

page_text: Date of Application, 15th Mar. 1894
Complete Specification Left, 15th Dec., 1894-Accepted, 19th Jan., 1895
I ALBERT EDWARD SEATON of Wilton House, Holderness Road, Hull, in the
County of York, Civil and Mechanical Engineer and Naval Architect, do hereby
eclare the nature of my said invention to be as follows:-
My invention relates more particularly to a type of steam generator, known as a
water tube, as distinguished from a fire tube, steam boiler.
The objects of my invention are to minimise the weight and space occupied by
such a boiler and to provide the means of drawing any of the main water tubes for
examination or replacement without disturbing the neighbouring tubes and at the
same time to so arrange the main water tubes that the whole and practically every
part of them is exposed to the hot gases as they pass from the fire grate to the
chimney.
I effect this in the following manner :-
I employ a central chamber of a cylindrical or other convenient form connected
by tubes (by preference straight tubes), to two water chambers placed below and to
two steam chambers placed above. The water chambers I place far enough apart
to admit of a fire grate of sufficient size being placed between them. The steam
chambers I place far enough apart to admit of the passage between them, of the hot
gases and products of combustion to the chimney.
By this arrangement the tubes connecting the central chamber with the water
chambers are inclined inwards at their upper ends, at each side and over the fire grate.
The bottom of the central chamber occupies a position immediately above the centre
of the fire grate.
The tubes connecting the central chamber with the steam chambers are inclined
outwards at their upper ends, at each side the flue space or uptake, so that the
heated gases from the fire grate pass first between the rows of lower tubes to the
right and left of the fire grate, then upwards and circumferentially round
the central chamber and, between the upper rows of tubes meeting in the flue
space above the central chamber between the steam chambers and thence to the
chimney.
I connect the steam chambers together by a pipe or pipes and I likewise connect
the steam chambers to the water chambers at their ends by pipes or tubes to act as
downcasts for the circulation of the water.
In some cases I place tubes, curved inwardly or otherwise, from each of the steam
chambers, above to the corresponding water chamber below; such tubes being
arranged to touch throughout the greater part of their length so as to form a water
wall to confine the heated gases on their passage from the lower to the upper rows
of tubes.
In some cases in lieu of the water wall of tubes last referred to I employ a light
metallic casing lined with suitable refractory and non conducting material.
From the foregoing description it will be seen that by making the central chamber
herein referred to of sufficiently large capacity, access may be obtained to all the
main water tubes, any or all of which, can be examined, cleaned, drawn, or replaced
without disturbing any of the other main water tubes.
With a view of reducing the weight contained in the central or lower water
chambers I sometimes employ within them other water and steam-tight vessels, to

page_text: act as displacers these displacers. being so arranged as to be readily withdrawn
through the end appertures of the said chambers.
As a modification of the foregoing arrangement for drawing the tubes which
necessitate the central chamber being made of larger size, I make the upper tubes
which connect the central chamber with the steam chambers of slightly larger
diameter than the lower tubes which connect the central chambers with the water
chambers, and by placing the upper and lower tubes at approximately the same
angle with the central chamber, the lower tubes on one side will be in line with the
upper tubes on the opposite side and vice versa, so that the lower tubes can be drawn
through the upper tubes into the steam chambers above. which I either make of
large enough diameter for the tubes to be drawn within them or I provide them with
covers which can be removed.
Dated this 15th day of March 1894.
R. HEBER RADFORD,
Agent for the Applicant.
Improvements in Steam Generators.
I, ALBERT EDWARD SEATON, of Wilton House, Holderness Road, Hull, in the
County of York, Civil and Mechanical Engineer, and Naval Architect, do hereby
declare the nature of my said invention and in what manner the same is to be
performed to be particularly described and ascertained in and by the following
statement :-
My invention relates more particularly to a type of steam generator known as a
water tube, as distinguished from a fire, tube steam boiler. The objects of my
invention are to minimise the weight and space, occupied by such a boiler, and to
provide the means of drawing any of the main water tubes for examination, or
replacement, without disturbing the neighbouring tubes, and at the same time to
so arrange the main water tubes that the whole and practically, every part of them
is exposed to the hot gases as they pass from the fire-grate to the chimney.
The nature of my invention will be better understood on reference to the
accompanying sheet of drawings in which,
Fig. 1. is a front elevation of my improved steam generator shewn partly in
"section (on the line A. B. Fig. 2.) Fig. 2. being a side elevation of the same (on
the line C. D. Fig. 1.).
Fig. 3. is a plan of one of the lower water chambers looking on the tube plate...
Fig. 4. is a side elevation of one of the lower water chambers shewing the
arrangement of the tubes which connect the upper steam chambers to the same, so
as to form a water wall to confine the heated gases on their passage from the lower
to the upper rows of tubes.
Fig. 5. is a back elevation shewing the downcast pipe by which the steam
chamber is conuected to the lower water chamber on each side of the generator.
Fig. 6. is a transverse section of a modified arrangement for drawing
the tubes.
The same letters refer to similar parts throughout the several views.
I carry out my invention in the following manner-
I employ a central chamber a.. of a cylindrical or other convenient form,
connected by tubes b. b. (by preference straight tubes,) to two water chambers c. c.
placed below, and also connected by tubes 6 to two steam chambers d. d. placed
above. The water chambers c. c. I place far enough apart to admit of a fire
grate e. of sufficient size being placed between them. The steam chambers d. d. I
place far enough apart to admit of the passage, between them of the hot gases and
products of combustion to the uptake or chimney f.

page_text: By this arrangement the tubes connecting the central chan
ambers are inclined inwards at their upper ends at each side and over the fire
rate. The bottom of the central chamber occupies a position immediately above
he centre of the fire grate.
The tubes connecting the central chamber with the steam chambers are inclined
utwards at their upper ends at each side the flue space or uptake, so that the
eated gases from the fire grate pass first between the rows of lower tubes to the
ight and left of the fire grate, then upwards, and circumferentially round the central
hamber and between the upper rows of tubes, meeting in the flue space above the
entral chamber between the steam chambers and thence to the uptake or chimney
s indicated by the arrows.
I connect the steam chambers together by a pipe, or pipes g. and I likewise
connect the steam chambers to the water chambers at their ends, by. pipes, or
tubes h. h. to act as downcasts for the circulation of the water.
In some cases I place tubes i. i. curved inwardly, or otherwise, from each of the
steam chambers above to the corresponding water chamber below, such tubes being
arranged to touch throughout the greater part of their length so as to form a water
wall to confine the heated gases on their passage from the lower to the upper rows
of tubes.
In some cases in lieu of the water wall of tubes last referred to I employ a light
metallic casing lined with suitable refractory and non-conducting material.
From the foregoing description it will be seen that by making the central
chamber herein referred to of sufficiently large capacity, access may be obtained to
all the main water tubes, any or all of which can be examined, cleaned, drawn or
replaced without disturbing any of the other main water tubes."
With a view of reducing the weight contained in the central or lower water
chambers I sometimes employ within them other water and steam tight vessels to
act as displacers, these displacers being so arranged as to be readily withdrawn
through the end appertures of the said chambers.
As a modification of the foregoing arrangement for drawing the tubes, which
necessitates the central chamber being made of larger size, I make the upper
tubes which connect the central chamber a, with the steam chambers d. d. of
slightly larger diameter than the lower tubes, b. b. which connect the central
chamber a. with the water chambers c. c. and by placing the upper and lower tubes
at the same or approximately the same angle with the central chamber, the lower
tubes on one side will be in line with the upper tubes on the opposite side and
vice versa, so that the lower tubes can be drawn through the upper tubes into the
steam chambers above, which I either make of large enough diameter for the
tubes to be drawn within them or I provide them with covers which can be
removed.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is,
1. In steam generators of the water tube type, the arrangement and combination
5 of parts and appliances comprising a central water chamber a. connected by
tubes, b. b. with lower water chambers, c. c. and also connected by tubes b¹ b¹, to
steam chambers, d. d. above, in such a manner that the whole or any of the
tubes, b. b. or, bb' may be examined, cleaned, drawn and replaced from the inside
of the said central water chamber without disturbing any of the neighbouring tubes,
0 in the manner and for the purposes substantially as herein described and illustrated
in Figs. 1, 2, 3, 4, and 5, of the accompanying drawings.
2. In steam generators of the water tube type, the arrangement and combination
of parts and appliances comprising a central water chamber, a. connected by
tubes b. b. with lower water chambers c. c. and also connected by tubes 6' 6¹ to
55 steam chambers d. d. above; the upper and lower tubes being placed at the same or
approximately the same angle with the central chamber so that the lower tubes on

page_text: one side will be in line or approximately in line with the upper tubes on the other
side, the upper tubes being made larger in diameter than the lower tubes so that the
latter may be drawn through them into the steam chambers above, which are either
fitted with covers or made large enough to allow of the tubes in either the upper or
lower nests to be drawn within or through them, in the manner and for the purposes
substantially as herein described and illustrated in Fig. 6. of the accompanying
drawings.
Dated this 13th day of December 1894.
R. HEBER RADFORD,
Agent for the Applicant.