Improvements in Injectors.
Year: 1899

page_text: Date of Application, 19th May, 1899
Complete Specification Left, 15th Feb., 1900-Accepted, 24th Mar., 1900
Improvements in Injectors.
We, JAMES GRESILAM, Director of the Firm of Gresham & Craven, Limited,
of Craven Iron Works, Salford, in the County of Lancaster, Engineer, and
FRANK JAMES GRESITAM, of the same place, Engineer, do hereby declare the
nature of the said invention, to be as follows:-
1. Our improvements relate to a valve which is combined with injectors having
two sets of cones concentric with each other and in the same axial line, one
being a lifter or ejector in which the steam is annular to the cone, the other
being the injector in which the steam is central.
The steam is required to first act in the lifter or ejector having the annular
steam jet, and then when this is started, the steam is next admitted to the
injector in which the steam is in the centre of the cone.
The valve combined
with such an arrangement of lifter or ejector and injector according to our
invention is a valve on the same actuating spindle having three functions.
It is a cone and cylindrical valve, the cone end of the valve shuts off the
steam to the injector when against a seating in the casing, but when the cone
valve is screwed or moved away from its seating steam passes it from the boiler
and enters a passage leading to the annular space round the nozzle or cone
forming the lifter or ejector the cylindrical part of the valve adjoining the
cone part fits as near as possible a hole for it so that when steam is first admitted
but little if any will pass the cylindrical part of the valve but when it is screwed
or moved out sufficiently the steam then also goes to a passage leading to the
centre of the injector nozzle or cone. When the valve is screwed or moved
inwards the steam is first cut off from the central cone, and then from the
annular cone and when the cone end of the valve is upon its seating it forms a
stop valve.
2. We combine according to our invention a valve similar to that described
under head 1 with that class of injectors commonly termed "Combination
Injectors" the subject of Letters Patent No. 1728 of 1889 granted to James
Gresham, and also of Letters Patent No. 19951 of 1893 also granted to the
said James Gresham (one of the present applicants) and to Harry Edward
Gresham, in which combination injectors the casing and parts forming the
injector are so constructed and arranged that through one junction with the
boiler steam may be supplied to the injector and the water propelled by it
may pass to the boiler.
In our improved combination injector there are two sets of nozzles annular
and in the same axial line so arranged as to be readily withdrawn and replaced
in the casing from one end without disturbing any other part except in some
cases a screw cap or plug.
The valve above referred to is combined with such combination injectors to
form a stop valve for shutting off steam between the boiler and the injector, and
when first partly screwed or moved out to allow steam to go to a passage leading

page_text: to the annular lifter or ejector, and when further moved out to allow steam
to pass to the central or injector cone.
3. Our further improvements relates to combination injectors herein before
referred to in which the longitudinal axis of the nozzles or cones are vertical,
and our invention consists in so arranging the chambers round the overflow
orifice or orifices from the nozzles and the passages therefrom that when overflow
takes place it remains in the overflow chamber to be taken on by the friction
of the passing jet, but when the overflow is in excess of what the jet will take,
it passes upwards to and through a valve opening outwards and is then conveyed
to be discharged to the passage or outlet leading to the overflow pipe.
Total this Wiltonth
1000
PETER J. LIVSEY,
Agent.
COMPLETE SPECIFICATION.
Improvements in Injectors.
We, JAMES GRESHAM, Director of the Firm of Gresham & Craven, Limited,
of Craven Iron Works, Salford, in the County of Lancaster, Engineer, and
FRANK JAMES GRESILAM, of the same place, 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:-
1. Our improvements relate to a valve which is combined with injectors having
two sets of cones concentric with each other and in the same axial line, one
being a lifter or ejector in which the steam is annular to the cone, the other
being the injector in which the steam is central.
The steam is required to first act in the lifter or ejector having the annular
steam jet, and then when this is started, the steam is next admitted to the
injector in which the steam is in the centre of the cone. The valve combined
with such an arrangement, of lifter or ejector and injector according to our
invention is a valve on the same actuating spindle having three functions.
It is a cone and cylindrical valve, the cone end of the valve shuts off the
steam to the injector when against a seating in the casing, but when the cone
valve is screwed or moved away from its seating steam passes it from the boiler
and enters a passage leading to the annular space round the nozzle or cone
forming the lifter or ejector-the cylindrical part of the valve adjoining the
cone part fits as near as possible a hole for it so that when steam is first admitted
but little if any will pass the cylindrical part of the valve but when it is screwed
or moved out sufficiently, the steam then also goes to a passage leading to the
centre of the injector nozzle or cone. When the valve is screwed or moved
inwards the steam is first cut off from the central cone, and then from the
annular cone and when the cone end of the valve is upon its seating it forms a
stop valve.
2. We combine according to our invention, a valve similar to that described
under head 1 with that class of injectors commonly termed Combination
Injectors" the subject of Letters Patent No. 1728 of 1889 granted to James
Gresham, and also of Letters Patent No. 19951 of 1893 also granted to the
said James Gresham (one of the present applicants) and to Harry Edward
Gresham, in which combination injectors the casing and parts forming the
injector are so constructed and arranged that through one junction with the

page_text: boiler, steam may be supplied to the injector and the water propelled by it
may pass to the boiler.
In our improved combination injector there are two sets of nozzles annular
and in the same axial line so arranged as to be readily withdrawn and replaced
in the casing from one end without disturbing any other part except in some
cases a screw cap or plug.
The valve above referred to is combined with such combination injectors to
form a stop valve for shutting off steam between the boiler and the injector, and
when first partly screwed or moved out to allow steam to go to a passage leading
to the annular lifter or ejector, and when further moved out to allow steam
to pass to the central or injector conc.
3. Our further improvements relate to combination injectors hereinbefore
referred to in which the longitudinal axis of the nozzles or cones are vertical.
and our invention consists in so arranging the chambers round the overflow
orifice or orifices from the nozzles and the passages therefrom that when overflow
takes place it remains in the overflow chamber to be taken on by the friction
of the passing jet, but when the overflow is in excess of what the jet will take,
it
passes upwards to and through a valve opening outwards, and is then conveyed
to be discharged to the passage or outlet leading to the overflow pipe.
Fig. 1, is a longitudinal section of an injector according to the first part of
our invention.
Fig. 2, is a longitudinal section of a combination injector with which our
improvements are combined, this combination injector being used with the
axes of its cones or nozzles in a horizontal position, and is according to the
second part of our invention.
Fig. 3, is a longitudinal section, partly an outside elevation of a combination
injector having our improvements combined therewith, the injector being used
with the axes of the cones or nozzles in a vertical position according to the
third part of our invention.
Fig. 4, is a longitudinal section of the injector shown by Fig. 3, but in a plane
at a right angle to that shown by Fig. 3.
Fig. 5, is a section at A-B across Figs. 3 and 4.
Fig. 6, is a section at C-D across Figs. 3 and 4.
In Fig. 1, a, is the casing of the injector, with flanges or other junctions for
steam a, for water a², for overflow ³, and for the delivery from the injector a*.
The casing a, has also a screw cap a³, to close the casing at the steam end
of the nozzles, one at 6, at the delivery end, and one at a, for the overflow
valve.
The casing also has a sleeve 8, screwed into it steam tight, for the steam
supply valve spindle and its stuffing box.
b, is the steam valve spindle passing and screwing through the sleeve a³, and
its outer end is kept steam tight by the stuffing box gland.
It has a wheel 61, and handle upon the wheel, at its outer end for screwing
the valve in and out.
The valve 2, at the inner end of the spindle is coned and fits a cone seating
in the casing steam tight when screwed in.
It is also cylindrical and fits a hole in the casing steam tight or nearly so.
When the valve 62, is first screwed out, steam enters a passage a³, leading to
an annular space ad, in the casing round the exterior of the outer or annular
steam ejector nozzle c, which is thus supplied with steam.
When the valve 62, is sufficiently screwed outwards to leave the hole in which
it fits in the casing, steam then also goes to a passage a³, leading to the centre
of the central steam injector nozzle c¹, and the valve can be opened more or
less to regulate the supply of steam thereto.
The steam combining cone d, for the annular ejector nozzle and for the central
steam injector nozzle c¹, are connected by side webs d

page_text: There are openings for overflow at d², d³ and +, and small holes d³, in
the sides of the smaller combining cone d.
The discharging nozzle e, is screwed at its inner end to screw into the delivery
end of the combining cone d, by this arrangement, the combining and dis-
charging nozzles are connected together and can be screwed into or removed at
the delivery end of the injector casing when the screw cap a, is taken out.
The delivery nozzle e, is screwed near its inner end to screw steam tight into a
partition ab, in the casing separating the delivery and overflow cavities formed
in the casing.
The inner end of the combining cone for the annular ejector nozzle fits into
the casing bored out for it, and has a groove formed round it for packing material
to make a tight joint in the partition a, between the cavity in the injector
casing for water and that for overflow.
The central steam injector nozzle c¹, is formed with a flange, and screwed
to screw into or out of the casing (when the screw cap a³, is removed). A ring,
is also formed on the inner side of its flange, and is connected thereto by
ribs and this ring ", on its exterior fits the hole for it in the casing steam tight.
The hole in the centre of the ring 3, is screwed and the annular or ejector
nozzle c, is screwed into it steam tight.
The spaces between the ribs connecting the flange 2, and ring 3, form ports
or passages for steam, from the annular cavity ad, in the casing to the annular
space for steam between the exterior of the central steam injector nozzle c¹, and
the interior of the ring or nozzle c, forming the annular ejector steam nozzle.
The overflow chamber, round the nozzles d, and within the casing. has
an outlet which is closed to prevent the atmosphere from entering by a flat
disc valve f, on a stem guided in a hole in the screw plug a².
From the cavity in the casing between the overflow valve f, and the screw
plug a, there are passages one on each side of the casing that meet in the
overflow outlet junction a³.
Fig. 2 The combination injector illustrated by this figure as to the arrange-
ment of the nozzles, the steam and overflow valves, the mode of constructing,
the mode of inserting them in the casing, and the closing of the casing by screw
caps or plugs is the same as that above described and illustrated by Fig. 1.
g, is the back pressure valve which shuts against a seating screwed into the
casing and it is carried on a stem guided in a hole in a screw plug or cap af.
h, is a stop valve between the boiler and injector, the injector being secured
to the boiler or to a flange on, a pipe from the boiler, so that its two openings are
fluid tight, one of which communicates with the steam space, and the other with
the water space of the boiler as described in the aforesaid specifications. In
the branch from the injector casing upon which the oblong junction flange a,
is formed, there are two separate holes or passages, one j, by which the steam
can pass to the valve 63, and the other k, by which the delivery from the injector
through the back pressure valve g, and stop valve h, can pass to the boiler.
The delivery valve g, stop valve h, junction flange a8, with the boiler and
the passages therein, are or may be arranged as described in the specifications
of the aforesaid Letters Patent.
Figs. 3, 4, 5 and 6-The steam nozzles in this modification of combination
injector are arranged in a manner similar to those hereinbefore described and
shown in Fig. 1, except that they are all inserted and screwed in or taken out of
the casing of the injector from one end when the screw cap or plug a6, "is
removed, and except as to a variation in the construction of the nozzles d, and
connection of the annular and central steam nozzles. The annular nozzle c,
is constructed so that the central nozzle ¹, screws into it (see Fig. 4) and there
are ports or passages c, in the sides of the part for the annular nozzle that
come opposite the annular cavities a³, for steam. The central nozzle c¹, is
first screwed into the part for the annular nozzle c, the two are then screwed

page_text: fluid tight into the casing by a box key fitting flats on the outer end of the
annular nozzle. Then the two first parts of the combining nozzles d, are cou-
nected by webs d', and are screwed into the partition a, and the other smaller
part of the combining cone d, is first screwed into the end of the delivery nozzle e,
which screws into the partition ab
The steam supply from the boiler comes through a hole j, in the junction
flange ; with the boiler and through a passage a", to the cavity at the end of
the valve, which is arranged (except as to position) in the manner hereinbefore
described, shown best in Fig. 6, where the passage to the annular cavity a", is
shown.
The steam that passes the cylindrical part of the valve 2, enters the cavity
round the spindle 6, and passes therefrom to the central nozzle c, as shown best
in Figs. 3 and 4.
³, is the water branch in the casing in which a plug cock i, is formed so as
to be able to turn on and shut off the water supply. This cock has a small
port, which is open to the passage leading to the ejector nozzle, which when
the cock is shut allows condensed steam to pass into the hollow of the conc
cock i, and out through one of its ports through a small passage, to the
overflow outlet a³. This port 2, is shut when the cock i. is opened.
This arrangement is similar to one described in the Specification of the said
Letters Patent No. 1728 of 1889.
The overflow valve is above the level of the overflow space between the com
bining and discharging or delivery nozzle.
It is a disc valve f, on a stem guided in a hole in a central boss connected by
webs to the sides of the hole for the valve in the casing to which access is
given by a plug or cap a, screwing fluid tight into the casing.
Thus arranged all overflow fluid is retained round the nozzles d, until there
is sufficient to reach the overflow valve f, through which the fluid in excess of
what fills the cavity passes to the outlet passage a
The back pressure valve g, is arranged same as that shown and described in
reference to Fig. 2, except in position in relation to the axis of the injector
casing, and after the fluid delivered by the injector has passed the valve, it
descends a side passage, in the casing to the hole k, in the flange 8, con-
nected with the water space of the boiler, which passage ah, is arranged with
a stop valve, (that is normally open, see Fig. 5) and is used to shut off com
munication with the boiler when the back pressure valve g, has to be removed,
the stop valve h, being constructed and arranged as shown best in Fig. 5, and
as described in the aforesaid specifications.
Having now particularly described and ascertained the nature of our said
invention, and in what manner the same is to be performed, we declare that
what we claim is :--
1. The combination of a steam valve with its connected passages with annular
and central steam nozzles substantially in the manner and for the purpose herein-
before described and illustrated by the drawings.
2. The combination and arrangement of injectors substantially as herein-
before described and illustrated by Fig. 1, of the drawings.
3. The combination and arrangement of our improvements above referred to
by Claim 1, with combination injectors used with the longitudinal axes of their
nozzles in a horizontal position, substantially as hereinbefore described and
illustrated by Fig. 2, of the drawings.
4. The combination and arrangement of injectors substantially as herein-
before described and illustrated by Fig. 2 of the drawings.
5. The combination and arrangement of our improvements above referred to
by Claim 1, with a combination injector used with the longitudinal axes of
the nozzles in a vertical position substantially as hereinbefore described and
illustrated by Figs. 3, 4, 5 and 6 of the drawings.

page_text: 6. The arrangement of the overflow cavities and overflow valve in combination
injectors used with the longitudinal axes of the nozzles in a vertical position
substantially as and for the purpose hereinbefore described and illustrated by
Figs. 3, 4, 5 and 6 of the drawings.
i. The combination and arrangement of injectors substantially as herein before
described and illustrated by Figs. 3, 4, 5 and 6 of the drawings.
+1 1+1. Wal
An 1000
PETER J. LIVSEY,
Agent