Other Steam Generators.
Year: 1888

page_text: Date of. Application, 9th Apr., 1888
Complete Specification Left, 18th Dec., 1888
Complete Specification Accepted, 22nd Jan., 1889
Other Steam Generators.
We, GEORGE WALLIS ALLEN of 63 York Chambers 27 Brazennose Street Manchester
in the County of Lancaster Gontleman and HENRY JOHN ALFRED BOWERS of 26 Essex
Road Acton London Engineer, do hereby declare the nature of this Invention to be
as follows:
In the Specification to Letters Patent No. 7772 A.D. 1887 granted to us we
describe the use of a feed water purifying apparatus consisting of an open trough and
scum plate placed within the boiler and an external separator; the feed water flows
through the trough to the scumplate thence to the separator where the impurities are
deposited and is finally conducted back into the boiler. The above arrangement has
proved most successful and we have already fixed large numbers of the patented
apparatus which are working well and giving great satisfaction. We have however
in some few cases experienced a difficulty in insuring the circulation of the water in
the proper direction this difficulty usually arising out of some peculiarity in the
construction of the boiler or the arrangement of the flues.
The first part of our present improvements consists principally in combining with
the feed water purifying apparatus an injector, pump, or equivalent whereby the
proper circulation of the water in the direction desired is maintained.
It is not at present our intention always to employ an injector or its equivalent
but only under special circumstances as above indicated and the injector or equivalent
means may either be employed in combination with the apparatus described in our
said Patent or with any similar arrangement of feed water purifier as for oxample a
trough without a scumplate or a scumplate without a trough and combined with
a separator.
We will describe one convenient mode of applying this part of our improvements
to a feed water purifier consisting of trough scumplate and external separator
arranged as described in our aforesaid Patent.
In this case we apply to the return pipe from the external separator an apparatus
on the injector principle and bring the nozzle or mouth of this apparatus slightly

page_text: above and preferably over the trough into which the water is fed or instead of or in
addition to the injector apparatus on the return pipe we may fit an injector or pump
operated by live steam or otherwise on the pipe which connects the scumplate or
trough to the separator. We propose also to connect the first named injector apparatus
by a pipe to any point near the bottom of the boiler in order that the lateral inductive
action of the water discharged by the return pipe may draw water from such point
back to the trough or scumplate whereby a perfect circulation of the water is
maintained.
The second part of our improvements relates to the external separator and consists
in providing means for skimming and removing oil and othor light impurities floating
on the surface of the feed water as it passes through the separator.
We effect this by fixing on the scroll or in the upper part of the separator at or
about the water level a vane or plate or moro than one if required which skims oil and
light impurities from the surface of the water passing through the separator and
guides such oil and light impurities into a reservoir near the top of the separator ;
this reservoir is provided with a blow off which may either be in connection with or
independent of the ordinary blow off pipe for the impurities deposited at the bottom of
the separator.
The above form of separator can be used as a means for extracting grease and air
from feedwater before entering a boiler in which case it could be placed between the
engine pump and boiler the feed being delivered through it. In order to extract air
from the feed water an air valve would require to bo fixed in the top of the
separator.

page_text: We, GEORGE WALLIS ALLEN of 63 York Chambers 27 Brazennose Street
Manchester in the County of Lancaster Gentleman and HENRY JOHN ALFRED BOWERS
of 26 Essex Road Acton London 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 :-
In the Specification to Letters Patent No. 7772 A.D. 1887 granted to us we
describe the use of a feed water purifying apparatus consisting of an open trough and
scum plate, placed within the boiler, and an external separator; the feed water flows
through the trough to the scum-plate thence to the separator where the impurities aro
deposited and is finally conducted back into the boiler. The above arrangement has
proved most successful and we have already fixed large numbers of the patented.
apparatus which are working well and giving great satisfaction. We have however
in some few cases experienced a difficulty in insuring a circulation of the water in the
proper direction, this difficulty usually arising out of some peculiarity in the con-
struction of the boiler or the arrangement of the flues.
The first part of. our present improvements consists principally in combining with
the feed water purifying apparatus an injector, pump, or equivalent whereby the
proper circulation of the water in the direction desired is maintained.
It is not at present our intention always to employ an injector or its equivalent but
only under special circumstances as above indicated and the injector or equivalent
means may either be employed in combination with the apparatus described in our
said Patent or with any similar arrangement of feed water purifier as for example
a trough without a scum plate or a scum plate without a trough and combined with a
separator.
We will describe one convenient mode of applying this part of our improvements
to a feed water purifier consisting of trough, scum plate and external separator
arranged as described in our aforesaid Patent.
In this case we apply to the return pipe from the external separator an apparatus
on the injector principle and bring the nozzle or mouth of this apparatus slightly
above and preferably over the trough into which the water is fed or instead of or in
addition to the injector apparatus on the return pipe we may fit an injector or pump
operated by live steam or otherwise on the pipe which connects the scum plate or
trough to the separator. We propose also to connect the first named injector
apparatus by a pipe to any point near the bottom of the boiler in order that the lateral

page_text: inductive action of the water discharged by the return pipe may draw water from
such point back to the trough or scum plate whereby a perfect circulation of the water
is maintained.
The second part of our improvements relates to the external separator and consists
in providing means for skimming and removing oil and other light impurities floating
on the surface of the feed water as it passes through the separator.
We effect this by fixing on the scroll or in the upper part of the separator at or
about the water level a vane or plate or more than one if required which skims oil and
light impurities from the surface of the water passing through the separator and guides
such oil and light impurities into a reservoir near the top of the separator; this
reservoir is provided with a blow off which may either be in connection with or
independent of the ordinary blow off pipe for the impurities deposited at the bottom of
the separator.
The above form of separator can be used as a means for extracting grease and air
from feed water before entering a boiler in which case it would be placed between the
engine pump and boiler the feed being delivered through it. In order to extract
air from the feed water an air valve would require to be fixed in the top of the
separator.
And in order that our Invention may be fully understood and readily carried into
effect we will describe the accompanying Sheet of Drawings reference being had to
the figures and letters marked thereon.
Figure 1 is a view illustrating the application of an injector apparatus in com-
bination with a feed water purifier according to the first part of our improvements..
Figs. 2, 3, 4 and 5 are views of. a separator embodying the improvements forming
the second part of our Invention. Fig. 2 being a vertical section taken on the
line A B Fig. 4. Fig. 3 a vertical section of the lower part of the separator taken on
the line EF Fig. 2. Fig. 4. a sectional plan of the separator taken on the line (D)
Fig. 2 showing the passage from the lower to the upper chamber of the separator
with vanes attached and Fig. 5 a detail view of the vanes.
Referring first to Fig. 1,
a designates part of the shell plate at the top of the boiler, 6 the return pipe from
the external separator (not shown in this view) c the injector apparatus, c¹ the nozzle
or mouth thereof, d the trough and d¹ the feed pipe and e is a pipe leading from a
point near the bottom of the boiler to the injector c. We have not shown any
Drawing of the scum plate but we prefer to use the trough combined with a scuui-
plate as described in our aforesaid Specification.
Referring now to Figs. 2 to 5,-
designates the pipe through which water is conducted from the boiler into the
separator is the scroll and g the vanes which we preferably cast with the scroll
and the cover of the separator, is the upper chamber and i the additional blow off,
; is the lower chamber and the ordinary blow off the two blow off pipes ik inay be
connected together or may be independent of each other.
The impurities conveyed in the water from the boiler entering the separator
through the pipe f traverse round the outer sido of the scroll depositing all the
heavier parts in the lower chamber j while the lighter parts are skimmed and
deflected upwards to the chamber by the vanes g¹. The lighter parts thus deposited
in the upper chamber h can be drawn off from time to time through the blow off i.
The water flows back from the lower part of the separator into the boiler through the
return pipe b.
Having now particularly described and ascertained the nature of our said Inven-
tion and in what manner the same is to be performed we declare that what we
claim is―
1. The combination with a feed water purifier or purifying apparatus, of an

page_text: 2. The combination with a separator having a scroll or equivalent, of means such
as the vanes g¹ for skimming and removing oil and other light surface impurities
from the surface of the water as it passes through the separator substantially as herein
described.
3. The several constructions and combined arrangements of parts embodying our
improvements in apparatus for purifying water for boilers and other steam generators
substantially as and for the purposes herein described with reference to the accompanying
Drawings.