Improvements in Injectors.
Year: 1894

page_text: Date of Application, 16th Oct., 1894
Complete Specification Left, 16th July, 1895-Accepted, 5th Oct., 1895
PROVISIONAL, SPECIFICATION.
Improvements in Injectors.
I, ROBERT GRUNDY BROOKE, of Upton Grange, Macclesfield, in the County
of Chester, Engineer, do hereby declare the nature of this invention to be as
follows:-
This invention has reference to injectors of the kind in which the non-return or
back pressure valve (hereinafter called the check valve) between the delivery
chamber and the delivery outlet is made readily accessible without breaking pipe
joints and it consists in improved constructions and arrangements of such injectors
whereby they are rendered neater and more compact and cheaper to manufacture
than those heretofore made.
For this purpose in an injector according to this invention, the delivery nozzle
discharges into a surrounding delivery chamber part of the wall of which forms a
wall or diaphragm that separates it from the valve chamber and delivery passage,
and is formed with a delivery orifice controlled by a suitable check valve the seat
for which is formed on or carried by the said wall or diaphragm, the body of the
injector casing opposite to the said delivery orifice being formed with an opening
normally closed by a cap or plug upon removing which ready access can be obtained
to the valve without breaking any pipe joints. The check valve may be a hinged,
clack or other suitable type of valve, and the delivery passage may extend away
in a direction at right angles to the axis of the delivery nozzle, or co-axially or
parallel therewith or in any other desired direction so that the delivery flange for
connecting the injector-casing to the boiler-shell may be arranged either parallel,
perpendicularly or at any desired inclination to the axis of the combining and
delivery nozzles as may be required.
Injectors according to this invention can be constructed in various forms. In
one arrangement, the delivery passage extends partly around the delivery chamber
and is arranged at right angles to the delivery nozzle which terminates in the
delivery chamber the outer end of which is closed by a screw plug or cap.
In a modified arrangement the delivery nozzle is formed with one or more lateral
outlets in communication with the delivery chamber, and its larger end extends
through the end of the injector casing and is closed by a screw cap.
In another arrangement the delivery passage extends through the flanged end
of the injector easing, and the end of the delivery nozzle, which terminates within
the said passage, is closed by a screw plug.
:
In order that the check valve may be examined and repaired whilst the boiler
to which the injector is applied, is under pressure, a atop cock must be provided at
some point on the delivery pipe. In one arrangement for this purpose the stop
valve-seat is formed on or carried by a perforated wall or partition extending
transversely across the passage from the wall of the delivery chamber, and the
stop-valve is carried on one end of a spindle screwed into a bush which is itself
screwed steam-tight into the injector-casing through a part thereof at the side of
or adjacent to the screw cap or plug closing the opening to the valve chamber.
The stop-valve is of rather larger diameter than the spindle, the arrangement
being such that when screwed back against the said bush, the projecting part of
the valve will make a steam-tight joint therewith.
Dated this 16th day of October 1891

page_text: :
Improvements in Injectors...
I. ROBERT GRUNDY BROOKE, of Upton Grange, Macclesfield, in the County
of Chester, 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 :-
.
This invention has reference to injectors of the kind in which the non-return
or back pressure valve (hereinafter called the check valve) between the delivery
chamber and the delivery outlet, is made readily accessible without breaking pipe
joints, and it consists in improved constructions and arrangements of such injectors
whereby they are rendered neater and more compact and cheaper to manufacture
than those heretofore made.
For this purpose in an injector according to this invention, the delivery nozzle
discharges into a surrounding delivery chamber part of the wall of which forms a
wall or diaphragm that separates it from the valve chamber and delivery passage
and is formed with a delivery orifice controlled by a suitable check valve the seat
for which is formed on or carried by the said wall or diaphragm, the body of the
injector casing opposite to the said delivery orifice being formed with an opening
normally closed by a cap or plug, upon removing which ready access
can be
obtained to the valve without breaking any pipe joints. The check valve may be a
hinged, clack or other suitable type of valve, and the delivery passage may extend
away in a direction at right angles to the axis of the delivery nozzle, or co-axially
or parallel therewith, or in any other desired direction so that the delivery flange
for connecting the injector-casing to the boiler-shell may be arranged either parallel,
perpendicularly or at any desired inclination to the axis of the combining and
delivery nozzles as may be required.
Injectors according to this invention can be constructed in various forms.
In the accompanying drawings,
Fig. 1 shows partly in longitudinal section and partly in side elevation,
Fig. 2 wholly in side elevation, and
Fig. 3 in cross section on the line ax of Fig. 1, an injector having its delivery
chamber and check valve constructed and arranged according to this invention.
Fig. 4 is a part side elevation, s similar to Fig. 2, but with the cap or plug opposite
the check valve removed.
In this arrangement the delivery nozzle 1 discharges end ways into the delivery
chamber 2 in which it terminates, the said nozzle being closed at its outer end by a
screw plug or cap 3. 4 is a part of the delivery chamber arranged to form a wall
or diaphragni between snch chamber and the valve chamber 5 and the delivery
passage 6 which, in this arrangement, extends partly around the delivery chamber
to the outlet at 6, and is arranged in a plane. at right angles to the delivery
nozzle 1, the delivery flange 6" being parallel to the axis of the combining and
delivery nozzles of the injector. 7 is the delivery orifice formed in the wall or
diaphragm 4 and controlled by a check valve 8 that has its seat at 9. In the
example now being described, the valve is of the hinged type, being carried by a
pin 10 arranged in a bearing 11 suitably secured to the wall or diaphragm 4 on
which the valve seat 9 is formed. The valve and its seat may however be modified
in construction. 12 is an opening formed in the casing 13 of the injector opposite
the valve chamber 5 and normally closed by a cap or plug 14 by removing which
ready access can be obtained to the valve without breaking any pipe joints.
Fig. 5 is a longitudinal section, partly in side elevation,
Fig. 6 a plan and Fig. 7 a cross section on the line of Fig. 5, showing a
modified arrangement in which the delivery nozzle 1 is formed with one or more
lateral outlets in communication with the delivery chamber 2, and its larger end
4+2 star

page_text: extends through the end of the injector casing 13 and is closed by a screw cap 1º.
In this case the delivery passage 6 in the wall or diaphragm 4 is shown vertical,
the hinged check valve 8 is arranged horizontally and jointed to a pin 10 screwed
through one side of the injector casing 13. The delivery passage extends away in
a direction at right angles to the axis of the delivery nozzle, as in the arrangement
shown in Figs. 1 to 4 inclusive, but terminates in a screw nozzle 6 by which the
injector is connected to a boiler instead of by a flauge. As will be obvious, the
delivery passage 6 can be carried round to any other suitable position in the injector
casing.
Fig. 8 is a longitudinal section, partly in elevation, showing a further modified
arrangement wherein the delivery passage 6 extends through the flanged end of
the injector casing 13 parallel with the axis of the delivery nozzle 1, so that the
flange 6 is at right angles to such axis. The delivery nozzle is shown as delivering
endways into the delivery chamber 2 which is closed by a screw-plug 3, but the said
nozzle might project in a fluid tight manner through the end of the said delivery
chamber into the delivery passage and be closed by a screw plug, communication
being then formed between the nozzle and the delivery chamber by lateral outlets,
as in the construction shown in Figs. 5, 6, and 7. The delivery orifice 7 and check
valve 8 are arranged as in the example shown in Figs. 5, 6 and 7, the valve seat 9
being made separate from and secured to the wall or diaphragm 4.
In order that the check valve 8 may be examined and repaired whilst the boiler
to which the injector is applied, is under pressure, a stop cock or valve must be
provided at some point on the delivery pipe between the check valve 8 and the
boiler, in a manner well understood. In the arrangement shown for this purpose
in Fig. 3, the stop valve seat 15* is formed on a perforated wall or partition 4*
extending transversely across the delivery passage 6 from the wall 4 of the delivery
chamber 2, and the stop-valve 15 is carried on one end of a spindle 16 screwed
through a bush 17 which is itself screwed steam tight into the injector casing 13.
The stop-valve is of larger diameter than the spindle, and coned on its upper side,
the arrangement being such that when the stop valve is screwed back against the
bush 17, the projecting part of the valve will make a steam tight joint therewith.
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 is :-
1. An injector wherein the delivery nozzle discharges into a surrounding delivery
chamber part of the wall of which forms a wall or diaphragm that separates such
chamber from the valve chamber and delivery passage and is formed with a delivery
orifice controlled by a check valve the seat for which is formed on or carried by the
said wall or diaphragm, the body of the injector casing, opposite to the said delivery
orifice, being formed with an opening normally closed by a cap or plug, substantially
as herein described for the purposes specified.
2. Injectors of the kind specified in the preceding claim constructed and
arranged substantially as herein before described with reference to and shown in
Figs. 1 to 4 inclusive, in Figs. 5 to 7 inclusive, and in Fig. 8 of the drawings
annexed.
Dated this 15th day of July 1895
W. Lloyd Wise,
46, Lincoln's Inn Fields, London, W.C., Agent for the Applicant.