Improvements in Injector Apparatus for Feeding Steam Boilers.
Year: 1893

page_text: Date of Application, 2nd Dec., 1893
Complete Specification Left, 29th Aug., 1894-Accepted, 13th Oct., 1894
PROVISIONAL SPECIFICATION.
Improvements in Injector Apparatus for Feeding Steam Boilers.
We, EDWARD DAVIES, of Plâs Dinam, Llandinam, in the County of Montgomery,
Engineer, and JAMES METCALFE, of 32 North Parade Aberystwith, in the County
of Cardigan, Engineer, do hereby declare the nature of the said invention, to be as
follows:
Our invention relates to improved combinations and arrangements of the parts of
our "flap nozzle" injector the subject of British Letters Patent No. 316 of 1880
granted to Edward Davies (one of the present applicants) by which it is made to
form what is commonly termed a "combination injector "that is, an injector which
can be connected with the steam boiler to be fed with water, by one, flange junction
in which there are two passages one for live steam from, and the other for water
delivered by the injector to be fed into the boiler.
Our improved combination and arrangement of our flap nozzle injector when the
nozzles are duly proportioned is or may be used either as a "live steam injector "
only, or as a "live steam injector" which is supplementary to an "exhaust steam
injector," that is, an injector which receives and propels the fluids delivered by an
exhaust steam injector.
Our improved combination and arrangement of "Hap nozzle" injector consists of
a casing having a flanged junction on one side, for connection with the boiler to be
fed in which flanged junction there are two passages each of which have a valve
seating inside which can be opened and closed by a valve, the screwed spindle on
each of which passes through a gland packing formed in the casing.
One of these passages in the flanged junction communicates with the steam space
of the boiler and the other with the water space or with the end of a pipe inside of
the boiler which conveys the feed water to that part where it is required to be
discharged into the boiler.
From the steam passage in the flanged junction there is a passage leading to a
cavity or chamber in the central part of the casing and into a partition at the inner
end of this cavity the steam nozzle is screwed, the outer end of this chamber being
then closed by a screw plug or cap.
The "flap nozzle" combining cone, and the discharging cone are arranged and
combined together as in our well known exhaust steam injector the subject of the
Patent hereinbefore mentioned, these parts screwing into the end of the central part
of the said casing.
There is a passage formed in the casing for the water supply or for the fluid
delivered by an exhaust steam injector the passage in the casing leading to a
chamber in the central part of the casing round the steam nozzle.
The fluid delivered enters an annular chamber and from it goes by a passage in
the casing to the boiler, but in going passes through a back pressure valve arranged
in the upper part of the casing on one side of the central part of the casing and also
part of the said stop valve.
There is another passage in the casing from the overflow chamber in the central
part of the casing, and this passage has or may have an ordinary overflow valve
used with a live steam injector or a valve weighted by a spring or other means and
the passage is connected up with a pipe for conveying the overflow away.
But when used as a live steam injector supplementary to an exhaust steam injector
there is an automatic valve arranged in the casing weighted by a spring or other
means, or it is connected with a diaphragm which is acted upon by fluid pressure
(when present) from the delivery end of the injector and this diaphragmed vaive

page_text: acts to allow the valve to open when starting the injector and closes and loads the
overflow valve when the jet is about being or has been established.
The automatic overflow valves may be separate from the casing if desired, and
in communication with the overflow pipe.
There is or may be a hollow or tubular cone arranged within the steam nozzle to
convey a part of the live steam beyond the nozzle of the main steam cone for both
"live steam" injectors simply, and "live steam" injectors which are supplementary
to "exhaust stean" injectors.
The water and overflow passages in the casing may be provided with cocks or
valves by which such passages may be controlled when desired.
Dated this First day of December 1893.
PETER J. LIVSEY,
Agent.
COMPLETE SPECIFICATION.
Improvements in Injector Apparatus for Feeding Steam Boilers.
We, EDWARD DAVIES, of Plas Dinam, Llandinam, in the County of Montgomery,
Engineer, and JAMES METCALFE, of 32 North Parade, Aberystwith, in the County
of Cardigan, 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 :-
65
Our invention relates to improved combinations and arrangements of the parts of
our flap nozzle" injector the subject of British Letters Patent No. 316 of 1880
granted to Edward Davies (one of the present applicants) by which it is made to
form what is commonly termed a "combination injector" that is, an injector which
can be connected with the steam boiler to be fed with water, by one flange junction
in which there are two passages one for live steam from, and the other for water
delivered by the injector to be fed into the boiler.
Our improved combination and arrangement of our flap nozzle injector when the
nozzles are duly proportioned is or may he used either as a "live steam injector"
only, or as a "live steam injector" which is supplementary to an "exhaust steam
injector" that is, an injector which receives and propels the fluids delivered by an
exhaust steam injector.
Our improved combination and arrangement of "flap nozzle" injector consists of
a casing having a flanged junction on one side, for connection with the boiler to be
fed in which flanged junction there are two passages each of which have a valve
seating inside which can be opened and closed by a valve, the screwed spindle on
each of which passes through a gland packing formed in the casing, or in a part
screwed therein.
One of these passages in the flanged junction communicates with the steam space
of the boiler and the other with the water space or with the end of a pipe inside-
the boiler which conveys the feed water to that part where it is required to
be discharged into the boiler.
From the steam passage in the flanged junction there is a passage leading to a
cavity or chamber in the central part of the casing and into a partition at the inner
end of this cavity the steam nozzle is screwed, the outer end of this chamber being
then closed by a screw plug or cap.
66
The flap nozzle" combining cone, and the discharging cone are arranged and
combined together as in our well known exhaust steam injector the subject of the
Patent hereinbefore mentioned, these parts screwing into the end of the central
part of the said casing.
There is a passage formed in the casing for the water supply or for the fluid
delivered by an exhaust steam injector the passage in the casing leading to a
chamber in the central part of the casing round the steam nozzle.

page_text: The fluid delivered enters an annular chamber and from it goes by a passage
in the casing to the boiler, but in going passes through a back pressure valve
arranged in the upper part of the casing on one side of the central part of the
casing and also past the said stop valve.
There is another passage in the casing from the overflow chamber in the central
part of the casing, and this passage has or may have an ordinary overflow valve
used with a live steam injector or a valve weighted by a spring or other means
and the passage is connected up with a pipe for conveying the overflow away.
But when used as a live steam injector supplementary to an exhaust steam
injector there is an automatic valve arranged in the casing weighted by a spring
or other means, or it is connected with a diaphragm which is acted upon by fluid
pressure (when present) from the delivery end of the injector and, this diaphragmed
valve acts to allow the valve to open when starting the injector and closes and
loads the overflow valve when the jet is about being or has been established. The
automatic overflow valves may be separate from the casing if desired, and in
communication with the overflow pipe.
There is or may be a hollow or tubular cone arranged within the steam nozzle to
convey a part of the live steam beyond the nozzle of the main steam cone for both
"live steam" injectors simply, and "live steam injectors which are supplementary
to "exhaust steam" injectors.
33
The water and overflow passages in the casing may be provided with cocks or
valves by which such passages may be controlled when desired.
Fig. 1, is an elevation in section, the section being in a line A-B Fig. 2, and in
a plane at a right angle to the face of the flange by which the "combination
injector" is secured to the boiler.
Fig. 2, is an elevation in section, the section being on the line C-D Fig. 1, and
in a plane at a right angle to the plane of the section of Fig. 1.
Fig. 3, is an elevation in section, the section being on the line E-F Fig. 2, the
plane of the section being parallel to the plane of the section of Fig. 1.
In this figure the valve spindles and valves and stuffing boxes, are omitted.
Fig. 4, is a partial elevation in section on a line corresponding to the line C-D
Fig. 1, but in the same plane as in Fig. 2, showing an additional steam nozzle within
the ordinary steam nozzle.
Fig. 5, is a sectional elevation of the upper part of the casing for the injector
nozzles, the section being in the same plane as Fig. 1, showing an automatic
diaphragın overflow valve, which is or may be used, when the combination injector
is arranged as a "live steam injector supplementary to an "exhaust steam 23
injector.
"
Fig. 6, is an end view of the casing of the combination injector having the
automatic diaphragm overflow valve shown in Fig. 5.
Fig. 7, is an elevation of the upper part of the casing of the combination injector,
with an automatic overflow valve in section on the line G-H Fig. 8.
Fig. 8, is a cross section on the line I-J Fig. 7.
Referring to Figs. 1, 2 and 3-a, is the casing of the "combination injector,"
al, is the flanged junction by which the combination injector, can be secured fluid
tight to the side of the boiler to be fed with water, or to a part which can be
connected up to the boiler.
a², is the passage (see Fig. 3) connected with the steam space or steam supply
from the boiler.
In this passage there is a seating a³, for a cone faced valve (not shown in Fig. 3,
but shown in dotted line in Fig. 1, and also in Fig. 2). This valve b, is upon the
inner end of a spindle ', which extends through a stuffing box tube 62, which
screws into the casing a, as shown in Fig. 1, and upon the outer end of this
spindle 6', a hand wheel, is secured..
The spindle &', is screw threaded and screws through the screw tapped inner end
of the stuffing box tube 2, the valve can thus be opened and closed by rotating the
hand wheel b³..

page_text: From the cavity, for the steam valve b, there is a passage ³, (see Fig. 2)
which communicates with a chamber 6, in the casing in a partition in which chamber
the steam nozzle 7, is screwed.
The end of this chamber 6, is closed by a screw cap a'.
The other part of the casing a, is bored out in the line of the axis of the steam
nozzle 6, and is formed with partitions and annular chambers as in the well known
exhaust steam injector, so that the combined flap nozzle combining and the receiving
and delivery.nozzles may be screwed in at the end of the casing.
To make the drawings more clearly understood we may name the parts. d, iş
the combining cone or nozzle with the flap d', hinged at d.
The extent to which the flap can open is limited by the ring or projection d³, in
the interior of the casing.
From one side of the combining cone d, there is a projection having at its end a
screw tapped ring d', into which the end of the receiving cone or nozzle e, is
screwed, and the outer end of the receiving cone or nozzle is enlarged, and has
openings e', through its sides for the liquid to pass to the annular space e, between
its exterior and the interior of the casing.
The outer end of the enlarged nozzle has hexagonal sides e³, by which it can be
screwed into the end of the casing.
The exterior parts of the combining cone d, and receiving cone e, fit the interior
of the casing at a and a, fluid tight.
There is a screw plug et, at the outer end of the enlarged part of the receiving
and discharging cone to close the hole therein.
From the chamber e, in the casing, round the enlarged part of the receiving and
discharging cone there is a passage es, formed to come under a cone lifting valve ƒ,
having its seating in the casing (see Figs. 2 and 3).
The stem of this valve f, is guided in the end of a tubular plug f', screwing into
the end of that part of the casing a, on one side of the main casing.
The cavity in the casing round the valve f, above its seating communicates by a
passage (see Fig. 3) with the chamber or cavity f³, for the valve, through
which the water passes to the boiler or to a pipe conveying it into the boiler,
through the hole, in the flange a', see Fig. 3.
The seating f, for the valve 4, is shown in Fig. 3, and the valve upon its
spindle, and passing through a tubular stuffing box, that screws into the casing
is shown in Fig. 1, and the exterior end of the valve spindle f', has squares upon it
for a key by which it may be rotated to open or close the valve f, which in other
respects is arranged same as the valve b, for steam.
There is an annular cavity a', formed in the interior of the main casing a, round
the flap and receiving nozzles where the overflow takes place, and this cavity or
chamber a, is in communication with a passage or branch pipe a³, cast with the
casing, the end of which branch is or may be prepared for a screw coupling so that
the pipe g, may be connected up to it which is to convey the overflow away.
There is another branch passage or pipe h, from the casing a, which is also
prepared to be coupled with the water supply pipe /'.
In this branch or passage h, a cock 2, is formed to turn on and off the supply
of water which passes to the chamber 3, in the casing round the steam nozzle .
The injector as hereinbefore described and shown in Figs. 1, 2 and 3 is
applicable as a "live steam" re-starting combination injector and when the nozzles
are duly proportioned it is applicable as a combination re-starting injector, when
used as supplementary to an exhaust steam injector, in which case it is supplied by
live steam from the boiler and receives the liquid from the exhaust steam injector
through the water supply pipe /¹.
When being used as a combination live steam re-starting injector, the end of the
overflow pipe g, is or may be turned up to retain liquid to seal the overflow outlet,
or may have an ordinary flap or other valve upon it.
Or the casing a, of the combination injector is or may be formed with a pro-
jection i, from one side opposite the chamber a', in the casing for overflow see

page_text: Fig. 8 (which is a section on the line I-J Fig. 7) where a', represents the overflow
chamber, and the dotted lines in Fig. 8, show the passage, from it to the
underside or seating of a cone faced lifting valve, see Fig. 7 (which is a vertical
section on the line G-H. Fig. 8) the stem of which lifting valve, is guided
in a tubular cone plug i, screwed fluid tight in the branch projection from the
casing a.
The cavity round the valve, communicates with a passage, formed on the
side of the casing that descends into the passage as, (Fig. 1) for the overflow.
The valve, may be arranged to close by its own weight or assisted by the
pressure of a helical spring, within the tubular stem of the valve.
This last described arrangement of spring weighted valve is applicable for some
combination injectors which are to be used as supplementary to exhaust steam
injectors, but the automatic overflow valve most applicable to combination injectors
which are to be supplementary to exhaust steam injectors, and which are to be
combined with the casing of such injectors is illustrated by Figs. 5 and 6.
Fig. 5, shows the casing with a cone seated valve j, arranged in a seating formed
in the casing opposite to and in communication with the overflow chamber a'.
This valvej, has guiding wings fitting and sliding in the hole for the seating of
the valve and an enlarged stem or head j', guided in a hole in a plate, fitting
into the cavity in the branch ³, from the casing, the enlarged head of the valve
coming against one side of a flexible diaphragm *, formed of leather or other
suitable material, the margins of which diaphragm being held between the Hange
round the branch, from the casing and a cover plate, which limits the outward
movement of the diaphragm, and valve j.
From the annular space within the branch 3, round the head j', of the valve,.
there is an outlet for the overflow passing the valve j, to the overflow branch a³.
There is a small passage, formed from the chamber e, in the casing round the
enlarged part of the discharging cone so that the pressure of the fluid therein can
pass through the small passage j, to the space between the inside of the cover
plate, and the diaphragm, this pressure thus acts to close the valve j, when the
jet has started to work.
At other times the pressure in the overflow chamber a', being in excess of what
it is when the injector is properly at work keeps the overflow valve j, open and
allows fluid to escape until the jet has acquired the required momentum, when the
pressure at the overflow diminishes and that at the delivery attains its maximum.
The branch, for the diaphragm valve j, may be placed at a right angle to the
branch having the flange a', upon it.
Fig. 4, shows a small nozzle 6, for live steam within the ordinary live steam
nozzle, which steam nozzle 6º, extends beyond the ordinary nozzle 6, and into
the combining cone d, which arrangement in some cases is found advantageous for
combination injectors.
The small central supplementary live steam nozzle 6, is arranged to form a
projection from the screw plug a', used to close the end of the casing and it has a
small screw plug, in its end.
Round the small supplementary steam nozzle ³, there are a series of slits b*,.
which communicate with the steam chamber 6, and thus both the ordinary and
supplementary steam nozzles are supplied with steam from the same chamber.
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 of an injector having a hinged or flap nozzle combining
cone or nozzle, and the other nozzles of an injector with a casing having passages
in it for steam, water and overflow and a delivery passage in which there is a
valve, such casing having one flange junction provided with two openings, one for
steam from and the other for water going to the boiler substantially as and for the
purposes herein before described.

page_text: 2. The combination and arrangement of a "combination injector" having a
"hinged or flap nozzle" combining cone or nozzle substantially as and for the
purposes hereinbefore described and illustrated by Figs. 1, 2 and 3 of the drawings,
and when modified by combining with the casing an automatic overflow valve
substantially as herein before described and illustrated by Figs. 7 and 8 of the
drawings or an automatic diaphragm overflow valve substantially as herein before
described and illustrated by Figs. 5 and 6, or a supplementary steam nozzle
substantially as herein before described and illustrated by Fig. 4 of the drawings.
Dated this Twenty-eighth day of August 1894.
PETER J. LIVSEY,
Agent.