Improvements in Injectors.
Year: 1897

page_text: Date of Application, 4th Oct., 1897
Complete Specification Left, 4th Aug., 1898-Accepted, 4th Oct., 1898
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 type known as combination injectors
in which several boiler fittings are combined in the one apparatus. It consists inter
alia in an improved arrangement of the steam, back-pressure and stop valves, and
also in an improved construction and arrangement of the various parts of the injector
as I shall now proceed to explain by aid of the accompanying drawings, wherein
Fig. 1 shows in central vertical section, and Fig. 2 in horizontal section, a combina-
tion injector according to this invention, Figs. 3 and 4 are cross sections thereof on
the lines A B C and D E respectively of Fig. 1, the steam and delivery cones being
omitted in these latter figures. Fig. 5 is a part plan of Fig. 4.
The body or casing 1 of the injector, which is intended to be fixed horizontally, as
shown, is constructed with a lateral branch 2 formed with parallel steam inlet and
water delivery passages 3 and 4 respectively and a flange 5 by which it can be
attached to a boiler with the said passages in communication with the steam and
water spaces thereof as well understood. The steam passage, which at its inlet
end 3 is at right angles to the axis of the injector, extends longitudinally towards
one end of the injector, as shown at 3" (Fig. 2), then rises as shown at 3b (Fig. 4),
and passes over the top of an extension 6% of the steam chamber 6 with which it
communicates by a horizontal hole 3 in the front wall of the extension. The water
delivery passage, which at its outlet portion 4 is also at right angles to the axis of
the injector, communicates with a chamber 4" at the opposite end of the injector,
then extends upward through a hole. 4x and transversely over the delivery chamber 7
as shown at 4° (Fig. 3) and communicates with a lower extension 7 of this chamber
through a vertical hole 4°. The hole 3 between the steam inlet passage and the
steam chamber 6 is control ed by a steam valve 8 (Fig. 4) provided with a horizontal
spindle 8 that is arranged to slide and is opened and closed by a hand lever 8c which
is. pivoted at 8d and is connected to a crosshead 8e on the outer end of the spindle by
links. 8. Or the spindle 8 may be screwed through a removable cap 9 having a
stuffing box 9" and be provided at its outer front end with a hand regulating wheel 8"
as shown in Fig. 6 which is a similar view to Fig. 4.
The steam valve and spindle instead of being placed at right angles to the injector
as shown in Figs. 3 and 4, can be arranged longitudinally of the injector and at the
top side, bottom, or centrally thereof. Fig. 7 shows partly in vertical section and
partly in side elevation, an arrangement in which the steam valve 8 is arranged
centrally within the steam chamber 6 to which the steam is directly admitted from
the part 3 of the steam inlet passage through a lateral hole 3º. The valve has its
seat formed on the outer end of the steam nozzle 6h. The valve spindle is arranged
to be operated by a hand lever as in Figs. 4 and 5, but it may be worked by a hand
wheel as in Fig. 6. In some cases an extra stop valve may be placed at any, con-
venient place between the starting valve 8 and the steam inlet 3 as a safe guard and

page_text: to enable the starting valve to be taken out under steam. Fig. 8 is a part horizontal
section of the steam supply end of an injector similar to that shown in Figs. 1 and 2
but in which the part 3 of steam inlet communicates with the part 3b through a
chamber 3d and a hole 3 which is controlled by a valve 8ª carried by a screw
spindle 8 that extends through a screw cap 8° and is adapted, as by a nut 8d fixed
thereto, to be rotated from the exterior of the injector for the purpose of closing or
opening the said stop valve.
The holes 4 and 4x (Fig. 3) through which water passes from the delivery cone 10
(Fig. 1) are respectively controlled by back pressure and stop valves 11 and 12 which
are provided with vertical spindles 11" and 12ª. The back-pressure valve spindle 11*
may be grooved as shown and is arranged to work freely in a vertical direction within
a removable cap piece. 13. The stop valve spindle 12ª is screwed through a
removable cap piece 14 and is adapted at its outer end, as by a nut 12b fixed
thereto, to be readily rotated for the purpose of opening or closing or regulating the
position of the stop valve 12.
15 and 16 are water inlet and overflow passages, arranged at right angles to the axis
of the injector and to the lateral branch 2. The passage 15 communicates, as shown,
with the water chamber 17 and combining cone 18 and is provided with a regulating
cock 19. The passage 16 communicates with the overflow chamber 20 into which
steam or overflow water passes by the ordinary opening 21 (Fig. 1) between the
delivery cone 10 and the part 18 of the combining cone and also through an
opening 22 which places the chamber 23, (within which is situate the gap between the
two parts 18, 18ª of the combining cone), in communication with the overflow.
chamber 20 and which is controlled by a non-return valve 24 arranged and operating
in the ordinary manner. The overflow passage 16 may in some cases be also provided
with a hand regulating cock 25 by which it can be closed when desired for the
purpose of preventing the injector from working and causing the steam supplied
thereto to pass down the water pipe 15 and heat the water in the supply tank or
tender connected therewith.
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 type known as combination
injectors in which several boiler fittings are combined in the one apparatus. It
consists inter alia in an improved arrangement of the steam, back-pressure and stop
valves, and also in an improved construction and arrangement of the various parts of
the injector as I shall now proceed to explain by the aid of the drawings filed with
my provisional specification and the additional drawings accompanying this speci-
fication.
Referring to the former drawings,
Fig. 1 shows in central vertical section, and Fig. 2 in horizontal section, a com-
bination injector according to this invention,

page_text: Figs. 3 and 4 are cross sections thereof on the lines A B C and D E respectively of
Fig. 1, the steam and delivery cones being omitted in these latter figures.
Fig. 5 is a part plan of Fig. 4.
In this arrangement, the body or casing 1 of the injector, which is intended to be
fixed horizontally, as shown, is constructed with a lateral branch 2 formed with
parallel steam inlet and water delivery passages 3 and 4 respectively and with a
flange 5 by which it can be attached to a boiler with the said passages in communica-
tion with the steam and water spaces thereof as well understood.
The steam passage,
which at its inlet end 3 is at right angles to the axis of the injector, extends longitu-
dinally towards one end of the injector, as shown at 3ª (Fig. 2), then rises as shown
at 3b (Fig. 4), and passes over the top of an extension 6ª of the steam chamber 6
with which it communicates by a horizontal hole 3c in the front wall of the extension.
The water delivery passage, which at its outlet portion 4 is also at right angles to
the axis of the injector, communicates with a chamber 4ª at the opposite end of the
injector then extends upward through a hole 4* and transversely over the delivery
chamber 7 as shown at 4b (Fig. 3) and communicates with a lower extension 7 of
this chamber through a vertical hole 4°. The hole 3c between the steam inlet
passage and the steam chamber 6 is controlled by a steain valve 8 (Fig. 4) provided
with a horizontal spindle 8 that is arranged to slide and is opened and closed by a
hand lever 8 which is pivoted at 8d and is connected to a crosshead 8° on the outer
end of the spindle by links 8. Or the spindle 8ª may be screwed through a remov-
able cap 9 having a stuffing box 9" and be provided at its outer front end with a
hand regulating wheel 8b as shown in Fig. 6 which is a similar view to Fig. 4.
The steam valve and spindle instead of being placed at right angles to the injector
as shown in Figs. 3 and 4, can be arranged longitudinally of the injector and at the
top, side, bottom, or centrally thereof. Fig. 7 shows partly in vertical section and
partly in side elevation, an arrangement in which the steam valve 8 is arranged
centrally within the steam chamber 6 to which the steam is directly admitted from
the part 3 of the steam inlet passage through a lateral hole 3°. The valve has its
seat formed on the outer end of the steam nozzle 6b. The valve spindle is arranged
to be operated by a hand lever, as in Figs. 4 and 5, but it may be worked by a hand
wheel as in Fig. 6. In some cases an extra stop valve may be placed at any con-
venient place between the starting valve 8 and the steam inlet 3, as a safe guard and
to enable the starting valve to be taken out under steam.
Fig. 8 is a part horizontal section of the steam supply end of an injector similar
to that shown in Figs. 1 and 2 but in which the part 3 of the steam inlet com-
municates with the part 3b (Fig. 4) through a chamber 3d and a hole 3° which is
controlled by a valve 8ª carried by a screw spindle 8" that extends through a screw
cap 8 and is adapted, as by a nut 8d fixed thereto, to be rotated from the exterior
of the injector for the purpose of closing or opening the said stop valve.
The holes 4 and 4* (Fig. 3) through which water passes from the delivery cone 10
(Fig. 1) are respectively controlled by back pressure and stop valves 11 and 12 which
are provided with vertical spindles 11ª and 12". The back-pressure valve spindle 11"
may be grooved as shown and is arranged to work freely in a vertical direction within
a removable cap piece 13. The stop valve spindle 12" is screwed through a removable
cap piece 14 and is adapted at its outer end, as by a nut 12b fixed thereto, to be
readily rotated for the purpose of opening or closing or regulating the position of the
stop valve 12.
15 and 16 are water inlet and overflow passages arranged at right angles to the axis
of the injector and to the lateral branch 2. The passage 15 communicates, as shown,
with the water chamber 17 and combining cone 18 and is provided with a regulating
cock 19. The passage 16 communicates with the overflow chamber 20 into which
steam or overflow water passes by the ordinary opening 21 (Fig. 1) between the
delivery cone 10 and the part 18 of the combining cone, and also through an
opening 22 which places the chamber 23, (within which is situate the gap between
the two parts 18, 18" of the combining cone), in communication with the overflow
chamber 20 and which is controlled by a non-return valve 24 arranged and operating

page_text: in the ordinary manner. The overflow passage 16 may in some cases be also provided
with a hand regulating cock 25 by which it can be closed when desired for the pur-
pose of preventing the injector from working and causing the steam supplied
thereto to pass down the water pipe 15 and heat the water in the supply tank or
tender connected therewith.
Fig. 1 of the accompanying drawings shows in horizontal section, and Figs. 2 and 3
in cross section on the lines A¹ B and C¹ D¹ respectively of Fig. 1, a construction of
injector somewhat like that herein before described with reference to Figs. 1 to 5
inclusive of the drawings filed with my provisional specification but in which the
part 3 of the steam passage communicates directly with the steam chamber 6 through
a hole 3 that is formed in the top of such chamber, and is controlled by a vertically
movable valve 8. This valve may be operated through a cross head 8° and links 8'
from a hand lever 8c which may be pivoted to the side of the injector so as to work
in a plane at right angles to the axis of the injector, as shown, or be pivoted to the
end of the injector so as to work in a vertical plane containing the said axis. Or the
valve may be a screw-down valve as in Fig. 6. Also the hole 4° connecting the water
chamber 7 with the part 4 of the water passage instead of being arranged at one
side of the water chamber, as in the construction first herein described, is formed
directly in the top of such chamber. 8 is a screw stop valve for the steam passage,
and 12 a similar stop valve for the water discharge passage, each of these valves
with its spindle being arranged with its axis parallel to that of the injector. By this
modified construction, the steam and water passages can be shortened and made of a
shape that will better facilitate the passage of steam and water therethrough.
.
Having now particularly described and ascertained the nature of this in-
vention and in what manner the same is to be performed, I declare that what I
claim is
1. A combination injector in which the steam valve, back pressure valve and water
stop valve or steam and water stop valves with the steain and water passages are con-
structed and arranged substantially as described and shown.
2. The combination and arrangement of parts constituting the improved combina-
tion injector herein before described with reference to and shown in Figs. 1 to 5
inclusive, or modified according to Fig. 6, or according to Fig. 7 or to Fig. 8 of the
drawings filed with my provisional specification, or according to Figs. 1, 2 and 3 of
the accompanying drawings.
May or must love.
For the Applicant,
W. LLOYD WISE,
46, Lincoln's Inn Fields, London, W.C., Chartered Patent Agent.