Year: 1898

page_text: We, JOHN MCCLURE CALDWELL PATON and JAMES BINGHAM ALLIOTT, both of
Bloomsgrove Works, Nottingham, in the County of Nottingham, Engineers,
do hereby declare the nature of this invention to be as follows..
-
This invention has reference to that part of steam generating apparatus in
which water and steam are stored under conditions of temperature and pressure
equal or approaching to those obtaining under light load conditions within
the boiler to which during periods of heavy load the water may be admitted at
such a temperature that it is readily convertible into steam, as described in the
Specifications of former l'atents No 20203 of 1891 and No 363 of 1892
In apparatus of this class, as described in the said former Specification
No. 20203 of 1891, it has heretofore been usual to place the storage tank above
the boiler so that the whole of the water might be fed from the former to the
latter by gravity, but this arrangement is in some cases disadvantageous or
impracticable, and it has sometimes been found necessary to place the tank
vertically, in which case the supply of water from the tank to the boiler, by
gravity, ceases when the level in the tank falls below that in the boiler Fuither-
more considerable trouble has been experienced in practice with the known
arrangements owing to the water in the storage tank not being of a uniform
temperature throughout, and although attempts have been made to overcome
this drawback, as by spraying the cold fed water into the steam space of the
tank, and by injecting steam into the water, there has still been some difficulty
in obtaining uniform temperatures It has also been proposed in the said
former Specification No 363 of 1892, to cuculate the water from the lower part
of the storage tank through the steam boiler and so back into the upper pait
of the storage tank and to assist this circulation when necessary by means of a
pump, but an arrangement involving the circulation of the water from the storage
tank through the steam boiler is not always convenient
Now this invention has reference to a thermal storage arrangement designed
to obviate the disadvantages of the known arrangements and allow of a part or
the whole of the water being stored at a lower level than has hitherto been
usual and yet secure the advantage of a gravitational feed to the boiler when
required, and also of the water being maintained of a practically uniform tem-
perature throughout
For this purpose the storage vessel or tank is divided into two connected
parts, it may be by means of a diaphragm arranged to form a pocket or tank of
annular or other shape within the upper part of the storage vessel proper, the
two parts of the tank being so disposed, as to level, that the water within the
upper part can flow into the boiler by gravity, and the two parts are combined
with a water raising or circulating device to which they are coupled by a pipe
r pipes, the arrangement being such that a positive circulation of water from
the lower to the upper part of the tank will be ensured so that water can flow
from the latter part to the boiler by gravity, and that the temperature of tho

page_text: For the
water will be practically equalized throughout. To assist in equalizing the tem-
perature, the water delivered into the upper part of the tank from the lower
part thereof, and also the feed water, may be allowed to enter the steam space
of the upper part of the tank in the form of streams or spray; also, when desired,
steam may be blown into the upper part of the tank so as to enter the water
therein at a suitable point below the level thereof such water constantly over-
flowing from the upper part of the tank to the lower part thereof
purpose of lessening friction when water 18 required to pass to the boiler, tho
water supply thereto 18 01 may be taken from a point on the said pipe or pipes
intermediate between the water raising devico and the upper part of the tank
The diaphragm dividing the tank into two parts 18 or may be a horizontal
plate formed with a hole fitted with an upwardly extending tube open at both
ends and serving as a steam communication between the two parts of the storage
vessel and also as a conduit through which the water can flow from the top to
the bottom of the tank
Instead of dividing the storage tank into upper and lower parts as described,
a separate upper vessel may be used connected to the lower vessel and to the
boiler in the manner and for the purpose herembefore set forth
We, JOHN MCCLURE CALDWELL PATON and JAMES BINGHAM ALLIOTT, both of
Bloomsgrove Works, Nottingham, in the County of Nottingham, Engineers,
do hereby declare the nature of this invention, and in what manner the same
18 to be performed, to be particularly described and ascertained in and by the
following statement:-
This invention has reference to that part of steam generating apparatus in
which water and steam are stored under conditions of temperature and pressure
equal or approaching to those obtaining under light load conditions within
the boiler to which during periods of heavy load the water may be admitted at
such a temperature that it is readily convertible into steam, as described in the
Specifications of former Patents No 20203 of 1891 and No 363 of 1892
In apparatus of this class, as described in the said former Specification
No. 20203 of 1891, it has heretofore been usual to place the storage tank above
the boiler so that the whole of the water might be fed from the former to the
latter by gravity, but this arrangement is in some cases disadvantageous oi
impracticable, and it has sometimes been found necessary to place the tank
vertically, in which case the supply of water from the tank to the boiler, by
gravity, ceases when the level in the tank falls below that in the boiler Further-
more considerable trouble has been experienced in practice with the known
alrangements owing to the water in the storage tank not being of a uniform
temperature throughout, and although attempts have been made to overcome
this drawback, as by spraying the cold feed water into the steam space of the
tank, and by injecting steam into the water, there has still been some difficulty
in obtaining uniform temperatures It has also been proposed in the said
former Specification No. 363 of 1892, to circulate the water from the lower part

page_text: of the storage tank through the steam boiler and so back into the upper part
of the storage tank and to assist this circulation when necessary by means of a
pump, but an arrangement involving the circulation of the water from the storage
tank through the steam boiler is not always convenient
Now this invention has reference to a thermal storage arrangement designed
to obviate the disadvantages of the known arrangements and allow of a part or
the whole of the water being stored at a lower level than has hitherto been
usual and yet secure the advantage of a gravitational feed to the boiler when
required, and also of the water being maintained of a practically uniform tem-
perature throughout
For this purpose the storage vessel or tank is divided into two connected
parts, it may be by means of a diaphragm arranged to form a pocket or tank of
annular or other shape within the upper part of the storage vessel proper, the
two parts of the tank being so disposed, as to level, that the water within the
upper part can flow into the boiler by gravity, and the two parts are combined
with a water raising or circulating device to which they are coupled by a pipe
er pipes, the arrangement being such that a positive cuculation of water fioin
the lower to the upper part of the tank will be ensured so that water can flow
from the latter part to the boiler by gravity, and that the temperature of the
water will be practically equalized throughout To assist in equalizing the tem-
perature, the water delivered into the upper part of the tank from the lower
part thereof, and also the feed water, may be allowed to enter the steam space
of the upper part of the tank in the form of streams or spray; also, when desired,
steam may be blown into the upper part of the tank so as to enter the water
therein at a suitable point below the level thereof such water constantly over-
flowing from the upper part of the tank to the lower part thereof. For the
purpose of lessening friction when water is required to pass to the boiler, the
water supply thereto is or may be taken from a point on the said pipe or pipes
intermediate between the water raising device and the upper part of the tank.
The diaphragm dividing the tank into two parts is of may be a horizontal
plate formed with a hole fitted with an upwardly extending tube open at both
ends and serving as a steam communication between the two parts of the storage
vessel and also as a conduit through which the water can flow from the top to
the bottom of the tank
Instead of dividing the storage tank into upper and lower parts as descubed,
a separate upper vessel may be used connected to the lower vessel and to the
boiler in the manner and for the purpose hereinbefore set forth
In the accompanying drawings, we illustrate several convenient arrangements
for carrying this invention into effect, the same reference numerals being
applied to like parts in each example
In the arrangement represented in Fig. 1, the storage vessel 1 18 divided into
two connected parts, 2 and 3 by means of a diaphragm 4 arranged to form a
pocket or tank of annular shape, within the upper part of the vessel 1
5 is the communicating passage between the two parts 6 is a pump whose
suction pipe 7 is connected to the lower part 3 of the storage vessel the pumn
outlet is connected with the upper part 2 of the vessel 1 by pipe 8 from which
a pipe 9 controlled by a valve 10 leads to the boiler or boilers 11. two being shown
The upper parts of the boilers are connected by pipe 12 and pipe 13, serving as
steam inlet and outlet, with the top of the upper part 2 of the storage vessel
Cold water 18 fed to the storage vessel above the perforated diaphragm 14 by
pine 15.
and 8
The upper part 2 of the storage vessel 18 kept supplied with water from the
lower part 3 by the circulating arrangement comprising pump 6 and pipes 7
The boiler is supplied by gravity from the upper part 2 of the storage vessel,
any water delivered into the said upper part in excess of what passes to the

page_text: boilers, overflows through the steam space and perforated plate 4 into the lower
part 3 of the storage vessel.
In the arrangement represented in Fig 2, water from the lower part of the
storage vessel 18 delivered by the pump 6 through pipe 8 into an annular pocket 16
located in the upper part 2, the bottom of this pocket being perforated so as to
cause the water to be delivered in streams through the steam space into the
water pocket below, whence the boilers are supplied through the pipe 9
In the modified arrangement represented in Fig. 3, the pipe 13 serves as the
steam outlet from the upper part 2 of the storage vessel and the separato
inlet pipe 17 delivers steam through a perforated 1ing or equivalent 18 into
the water contained in the upper part 2.
14 is a perforated plate or tray, through the holes in which descends the
water which flows over from the upper part 2, as also that supplied by the cold
feed pipe 15
Fig 4 shows an arrangement in which, instead of a divided vessel, there are
an upper vessel 2 and a lower vessel 3, connected by the pipe 6, which rises
a considerable distance within the upper vessel 2
The steam inlet and outlet pipe 13 is connected to the lower vessel 3 in which
there 18 a perforated tray "14" The cnculating and boiler-feeding arrange-
ments 6, 7, 8, 9 iesembles those illustrated in Figs. 1 and 3.
15 18 the cold feed
Having now particularly described and ascertained the nature of the said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim 18.
-
1 The combination in a thermal storage arrangement of upper and lower
chambers, the upper chamber being at such level that it can give a gravitational
feed to the boiler or boilers with means of circulation such as will keep said
upper chamber supplied with water so long as the lower chamber contains a
sufficient supply to permit thereof and with arrangements for supplying the
apparatus with water for heating the water and supplying it to the boiler or
boilers all substantially as described
2 A thermal storage arrangement in which the water is stored at two levels,
the higher level being somewhat higher than the highest ordinary level of
the water in the lower portion of the apparatus and being such that water can
flow from it into the boiler or boilers by gravitation, while the water is con-
tinually circulated from the lower level to the higher, from which it, or so
much of it as does not pass to the boiler overflows to the lower level dropping
or spraying while doing so through the steam contained in the apparatus, all
substantially as described
3-For the purpose referred to, the several arrangements of apparatus herein-
before respectively described with reference to and illustrated in Fig 1, Fig 2
Fig 3, and Fig 4 of the drawings
Dated this 26th day of September 1899
For the Applicants,
W LLOYD WISE,
46, Lincoln's Inn Fields, London, WC,
Chartered Patent Agent