Improvements in Injectors.
Year: 1898

page_text: PROVISIONAL SPECIFICATION.
Improvements in Injectors.
I, THOMAS HENRY WHITE, of 103, Church Street, Pendleton, Salford, in the
County of Lancaster, Engineer, do hereby declare the nature of this invention
to be as follows:-
The improvements in injectors in which my invention consists, relate partly
to combination-injectors, that is to say, injectors of the kind in which some of the
boiler-fittings requisite to enable an injector to be used are combined into one
apparatus along with such injector, and partly relate to injectors of other kinds.
The object of one part of my invention is the provision of combination-injectors
which shall be simpler in construction and more compact and more convenient
and efficient in use than those hitherto constructed, and to enable access to the
interior of such injectors to be obtained and parts of such injectors to be removed
while such injectors remain attached to steam-boilers containing steam under
pressure, and to enable the working parts of one injector to be readily replaced
by corresponding parts prepared for use in the same or any other similar injector
and enable any of a number of similar parts to be capable of being employed in
any of a number of similar injectors.
According to this part of my invention, I provide in constructing a combina-
tion-injector a casing provided with a flange or other device to enable it to be
secured to the locomotive or other steam-boiler to which it is to be applied and
with openings to be placed opposite to other openings through which the steam
to be supplied to the injector and the water to be supplied to the said boiler by
means of the injector may be respectively supplied to and conducted from the
injector. In the said casing I mount a valve provided with a screwed spindle
or otherwise made capable of being moved against or from a seating formed in
the said casing so as to shut steam off from the injector or allow steam to pass to
such injector and upon such casing I provide means to enable a pipe for the
supply or drawing of water to be connected and also a steam-nozzle, a combining
cone provided with an ordinary overflow-opening and a supplementary overflow-
opening to facilitate the starting of the injector and enable it to restart auto-
matically after any interruption of its working if steam and water are supplied
to or available for it, a valve to shut off the supplementary overflow-opening
from the ordinary overflow-opening and the external air when the injector is
working, a delivery-cone, a back-pressure or non-return-valve by which the return
of liquid from the boiler is prevented from taking place and a valve which when
screwed or otherwise brought into contact with a seating provided in the said
casing will close the passage between the back-pressure or non-return-valve and
the boiler.
Passages or channels are formed in the said casing to lead steam from the
steam-supply-opening through the seating aforesaid to the steam-nozzle and to
lead the combined steam and water from the delivery nozzle of the injector to
the back-pressure or non-return-valve and from the back-pressure or non-return-
valve to the opening for the discharge of water into the steam-boiler and also

page_text: to lead water or steam escaping from the ordinary overflow-opening or the
supplementary overflow-opening out of such casing. The steam-nozzle is screwed
into or otherwise secured in position in the casing so as to be removable therefrom
and in order to close the opening through which the steam-nozzle is inserted
into position a removable cap is provided so that when the cap is removed the
steam-nozzle may be removed from the casing in order to be examined, cleaned
or repaired or for another to be substituted for it. The combining cone and
delivery-cone which are preferably formed in one with each other are also screwed
or otherwise secured in position in the said casing so as to be removable therefrom
and in order to close the opening through which the combining cone and delivery-
cone are inserted into position a removable cap is provided so that when such
cap is removed the combining cone and delivery-cone may be removed from the
casing. The seating in conjunction with which the back-pressure or non-return-
valve above mentioned acts is also made capable of removal from the said casing
and the opening through which such seating and valve are inserted into position
is closed by a cap which is removable so that when such cap is removed the said
valve or the said valve and seating may be removed from the casing. The said
casing is also provided with a removable cap which may form a guide for a stem
upon the valve employed in conjunction with the supplementary overflow-opening
so that when such cap is removed access may be had to the said valve for the
examination, cleaning or removal of such valve. A valve with a spindle screwed
so that when turned it may move the valve with which it is used is provided in
order that the supply of water to the injector may be regulated as may be requisite
and in order that the passage for the supply of water may be closed as may be
requisite from time to time. In one method of forming the casing aforesaid, the
provision for the connection of a pipe by which water may pass to the injector
and the valve to regulate the admission or shut off the supply of water may be
provided or arranged upon or in one projection formed upon the said casing and
the opening for the escape from the injector of fluid which has escaped from the
ordinary overflow-opening or supplementary overflow-opening of the injector and
the valve for use with the supplementary overflow-opening may be arranged in a
second projection formed upon the said casing so that the injector shall present a
very neat and compact appearance.
In a modification of this form of my invention, I employ a steam-supply-pipe
separate from the injector and provide such steam-supply-pipe with a valve or
cock by means of which the supply of steam may be regulated or shut off.
The hereinbefore described arrangement of valve to adjust the supply and shut
off steam from the injector and the herein before described arrangements for
enabling the back-pressure-valve to be removed from the injector while such
injector remains attached to a steam-boiler containing steam under pressure and
the hereinbefore described arrangements in which the provision for the connec-
tion of a pipe by which water may pass to the injector and the valve to regulate
the admission or shut off the supply of water may be provided or arranged upon
or in one projection upon the casing of the injector while the opening for the
escape of water from the ordinary overflow-opening and the supplementary over-
flow-opening if there be one and the valve to be used with the supplementary
overflow-opening if there be one may be arranged in a second projection upon
the said casing, may be applied to injectors of other kinds as well as to com-
bination-injectors and form in themselves distinct parts of my invention.
A further part of my invention relates to the steam-nozzles of injectors and
has for its object to simplify the construction and working of injectors and enable
the steam-nozzle of an injector to be combined with a valve by means of which
the supply of steam to the injector may be regulated or shut off and also enable
the steam-nozzle to be used as a means of regulating the relative proportions
between the area of the passage for the supply of steam and the area of the
passage for the supply of water and also to enable one steam-nozzle to be readily

page_text: replaced by any of a number of similar steam-nozzles and enable any of a number
of similar steam-nozzles to be employed in any of a number of similar injectors.
According to this part of my invention, I provide the steam-nozzle of an
injector with a spindle which is screwed and provided with a handle so that it may
be turned and by being turned be moved longitudinally and in being turned
turn the steam-nozzle and move it lengthwise. I provide the said spindle with a
valve arranged to act in conjunction with a seating which is provided in the
casing and may be made removable therefrom. The steam-nozzle is provided
with holes which communicate with the interior thereof and are surrounded by a
cavity formed in the casing of the injector so that as soon as the said valve is
moved from the seating in conjunction with which it is arranged to act steam
passing through such seating shall have full access to the central passage of the
steam-nozzle. The steam-nozzle being capable of longitudinal movement enables
the relative areas of the openings or passages for steam and water to be adjusted.
I may provide any suitable scale and index so that the steam-nozzle may readily
be moved into the position suitable for the supply of water to a steam-boiler
containing steam at any particular pressure. The steam-nozzle may pass through
a guide formed in the casing of the injector but need not be made to fit very
closely therein and in a modification of this part of my invention I arrange that
there shall be a space around the said steam-nozzle so that when the valve on the
spindle of such steam-nozzle is moved away from the seating with which it acts,
steam from the cavity surrounding the steam-nozzle may pass around such steam-
nozzle in the form of an annular jet so as to enable the injector to obtain water
from below the level at which it is fixed.
A further part of my invention relates to the combining cones and delivery-
cones of injectors and has for its object to simplify the construction and working
of injectors and enable the combining and delivery-cones of an injector to be
readily replaced by any of a number of similar combining and delivery-cones
and enable any of a number of similar combining cones and delivery-cones to
be employed in any of a number of similar injectors.
According to this part of my invention I form the combining cone of an injector
in one piece with the delivery-cone thereof and in order to secure the combined
combining cone and delivery-cone in the casing of the injector in which it is to
be employed I provide a screw-thread and only one faced joint so as to enable
tight joints to be readily made at any time.
A further part of my invention also relates to the combining-cones and delivery-
cones of injectors and has for part of its object to simplify the construction and
working of injectors and enable the combining and delivery-cones of an injector
to be readily replaced by any of a number of combining and delivery-cones and
enable any of a number of similar combining cones and delivery-cones to be
employed in any of a number of similar injectors, and for a further object to
enable such small quantities of water as may escape from the ordinary overflow-
opening of an injector or the supplementary overflow-opening if there be one,
during the working of an injector to be drawn into the ordinary overflow-opening
so that during the working of the injector there shall be no escape of water from
the outlet provided in the casing of the injector for the escape of fluid issuing
from the ordinary overflow-opening or the supplementary overflow-opening should
there be one.
According to this part of my invention, I form the combining cone of an
injector in one piece with the delivery-cone thereof and in the combined combining
cone and delivery-cone I form the ordinary overflow-opening by forming a simple
hole transversely therein and in the casing of the injector I form a cavity to
surround the combined combining and delivery-cone and form a small opening in
the said cavity to place the said cavity in communication with a chamber formed
for the purpose, or the chamber provided to allow fluid escaping through the
supplementary overflow-opening if there be one to escape from the injector and
provide the chamber in communication with which the said cavity is placed with

page_text: an outlet formed in such position that in whatever position the injector may be
fixed for use liquid escaping from the ordinary overflow-opening or the supple-
mentary overflow-opening if there be one can not escape from the injector forth-
with but only when a quantity suflicient to fill if not the whole at least a great
part of the cavity surrounding the ordinary overflow-opening and the chamber
in communication with which it is placed.
The object of a further part of my invention is to provide simple and efficient
means by which the supply of water to injectors may be readily adjusted in accord-
ance with the pressure of the steam in the steam-boilers in conjunction with
which such injectors are applied.
According to this part of my invention I form in the casing of an injector a
passage surrounding the steam-nozzle and connect to one side of such chamber
the pipe by means of which water is to be supplied to the injector and at the
opposite side or at any other part of such chamber which may be considered
suitable in any case I provide a hole leading to the entrance to the combining
cone of the injector and form around such hole a seating in conjunction with
which a valve provided with a screwed spindle or other means by which it may be
moved and an index by means of which its position may be indicated.
Although I have hereinbefore described my invention as applicable to injectors
for supplying water to steam-boilers I would have it understood that my invention
is also applicable to other injectors for use in the supply of water or other liquids.
Dated this 28th day of February 1898.
HOWARD CHEETHAM,
Manchester,
Agent to the Applicant.
I, THOMAS HENRY WHITE, of 103, Church Street, Pendleton, Salford, in the
County of Lancaster, 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:
-
The improvements in injectors in which my invention consists relate partly
to combination-injectors, that is to say, injectors of the kind in which some of the
boiler-fittings requisite to enable an injector to be used are combined into one
apparatus along with such injector, and partly relate to injectors of other kinds.
The object of one part of my invention is the provision of combination-
injectors which shall be simpler in construction and more convenient
and efficient in use than those hitherto constructed, and to enable access to the
interior of such injectors to be obtained and parts of such injectors to be removed
while such injectors remain attached to steam-boilers containing steam under
pressure and to enable the working parts of one injector to be readily replaced
by corresponding parts prepared for use in the same or any other similar injector
and enable any of a number of similar parts to be capable of being employed in
any of a number of similar injectors.
According to this part of my invention I provide in constructing a combina-
tion injector a casing provided with a flange or other device to enable it to be
secured to the locomotive or other steam-boiler to which it is to be applied and
with openings to be placed opposite to other openings through which the steam
to be supplied to the injector and the water to be supplied to the said boiler by
means of the injector may be respectively supplied to and conducted from the
injector. In the said casing I mount a valve provided with a screwed spindle

page_text: or otherwise made capable of being moved against or from a seating formed in
the said casing so as to shut steam off from the injector or allow steam to pass to
such injector and upon such casing I provide means to enable a pipe for the
supply or drawing of water to be connected and also a steam-nozzle, a combining-
cone provided with an ordinary overflow-opening and a supplementary overflow-
opening to facilitate the starting of the injector and enable it to restart auto-
matically after any interruption of its working if steam and water are supplied
to or available for it, a valve to shut off the supplementary overflow-opening
from the ordinary overflow-opening and the external air when the injector is
working, a delivery-cone, a back-pressure or non-return-valve by which the return
of liquid from the boiler is prevented from taking place and a valve which when
screwed or otherwise brought into contact with a seating provided in the said
casing will close the passage between the back-pressure or non-return-valve and
the boiler.
Passages or channels are formed in the said casing to lead steam from the
steam-supply-opening through the seating aforesaid to the steam-nozzle and to
lead the combined steam and water from the delivery-nozzle of the injector to
the back-pressure or non-return-valve and from the back-pressure or non-return-
valve to the opening for the discharge of water into the steam-boiler and also
to lead water or steam escaping from the ordinary overflow-opening or the
supplementary overflow-opening out of such casing. The steam-nozzle is screwed
into or otherwise secured in position in the casing so as to be removable therefrom
and in order to close the opening through which the steam-nozzle is inserted
into position a removable cap is provided so that when the cap is removed the
steam-nozzle may be removed from the easing in order to be examined, cleaned
or repaired or for another to be substituted for it. The combining-cone and
delivery-cone which are preferably formed in one with each other are also screwed
or otherwise secured in position in the said casing so as to be removable therefrom
and in order to close the opening through which such combining-cone and delivery-
cone are inserted into position a removable cap is provided so that when such cap
is removed the combining-cone and delivery-cone may be removed from the casing.
The seating in conjunction with which the back-pressure or non-return-valve herein-
before mentioned acts may also be made capable of removal from the said casing and
the opening through which such seating if removable and the said valve are inserted
into position is closed by a cap which is removable so that when such cap is removed
the said valve or the said valve and seating may be removed from the casing. The
said casing is also provided with a removable cap which may form a guide for a stem
upon the valve employed in conjunction with the supplementary overflow-opening
so that when such cap is removed access may be had to the said valve for the
examination, cleaning or removal of such valve or the substitution of another for
it. A valve with a spindle screwed so that when turned it may move the valve
with which it is used is provided in order that the supply of water to the injector
may be regulated as may be requisite in accordance with the steam-pressure and
in order that the passage for the supply of water may be closed as may be
requisite from time to time. In one method of forming the casing aforesaid the
provision for the connection of a pipe by which water may pass to the injector and
a valve to regulate the admission or shut off the supply of water may be provided
or arranged upon or in one projection formed upon the said casing and the
opening for the escape from the injector of fluid which has escaped from the
ordinary overflow-opening or supplementary overflow-opening of the injector and
the valve for use with the supplementary overflow-opening may be arranged in a
second projection formed upon the said casing so that the injector shall present
a very neat and compact appearance.
In the accompanying drawings in all the figures of which the same letters of
reference are employed to indicate corresponding parts, Fig. 1 is a front elevation
of one form of combination-injector constructed according to this part of my
invention, Fig. 2 is a vertical section taken on the plane indicated by the

page_text: line (22) of Fig. 1, Fig. 3 is a vertical section taken on the plane indicated by
the line (3-3) of Fig. 2 and Fig. 4 is a horizontal section taken on the plane
indicated by the line (4-4) of Figs. 1, 2 and 3. In the injector illustrated in
Figs. 1, 2, 3 and 4 in which (a) is the casing, the connection of the pipe by
which water may pass to the injector and the valve (c) to act in conjunction with
a seating (c) in the casing (a) and regulate the admission or shut off the supply
of water are respectively formed upon and arranged in one projection (1) formed
upon the casing (a) and the opening (d) for the escape from the injector of fluid
which has escaped from the ordinary overflow-opening (e) or supplementary over-
flow-opening (f) and the valve (g) for use with the supplementary overflow-open-
ing (f) are arranged in a second projection (E) formed upon the casing (a) and
the casing (a) is provided with a flange (h) to enable it to be applied to the
boiler with which it is to be used, and openings (¹) (7) are provided in such
casing (a) to be placed respectively opposite to other openings by means of which
the steam to be supplied to the injector and the water to be supplied by means
of the injector may respectively be supplied to and conducted from the injector,
(k) is the valve which I provide in the casing (a) in order to allow steam to pass
to or to shut off steam from the injector, (m) is the steam-nozzle, (n) the com-
bining-nozzle formed in two parts with an ordinary overflow-opening (e) and a
supplementary overflow-opening (f), (o) is the delivery-nozzle, (g) is a valve
to shut off the supplementary overflow-opening from the ordinary overflow-open-
ing and the external air when the injector is working, (2) is the back-pressure
or non-return-valve by which the return of liquid from the boiler is prevented
from taking place, (q) is a valve which when brought into contact with a seating
formed around a hole in the said casing (a) will close the passage () between
the back-pressure or non-return-valve (p) and the boiler, (2) is the passage or
channel to lead steam from the steam-supply opening (i) through the seating
aforesaid to the steam-nozzle (m), (r) is the passage to lead the combined steam
and water from the delivery-nozzle (o) to the back-pressure or non-return-
valve (2), () is the passage to lead the combined steam and water from the back-
pressure or non-return-valve (p) to the opening (j') for discharge into the boiler,
(s) is the passage to lead water or steam escaping from the ordinary overflow-
opening to the opening (d) and (t) is the passage to lead water or steam escaping
from the supplementary overflow-opening to the passage (s) and so to the opening (d).
The valve (k) is provided with a screwed spindle (¹) passing through and
engaging with screw-threads in a stuffing-box or gland (1) screwed in the
casing (a) and is also provided with a handle (3) by which it may be turned and
so moved into and out of contact with the seating formed around the hole in
the partition forming part of the casing (a) and dividing the passage (i) into
two parts. The projection (D) is provided with a union (6) for the connection
of the pipe for the supply or drawing of water.
In the projection (D) is mounted a screwed spindle (a) passing through and
capable of being screwed lengthwise in a stuffing-box or gland (c) screwed into
the said projection (D) and provided with a plug (v). The spindle (u) is provided
with a conical projection (¹) capable of being made to bear upon the valve (c)
and with a milled head or handle (²) formed with a scale which in conjunction
with an index-line upon the stuffing-box or gland (w) indicates the position into
which the spindle (") may be turned at any time and the extent to which the
valve (c) may be allowed to leave the seating (c) and most conveniently the
numbers upon the scale may be arranged to indicate steam-pressures in such a
way that when the spindle (u) is turned so that the number opposite the index
corresponds to the pressure of the steam to be supplied to the injector the valve (c)
shall be in position to allow the passage of the quantity of water requisite for
the proper working of the injector by means of steam of the said pressure. The
spindle (u) and valve (c) also enable the passage for the supply of water to be
closed as may be requisite from time to time.
The steam-nozzle (m) is screwed into the casing (a) so as to be removable there-

page_text: from and a cap (m²) screwed into the casing (a) closes the opening through which
the steam-nozzle is inserted into position. One part of the combining-cone (n),
that is to say the part (n) is formed in one with the casing (a) and the other
part that is to say the part (n²) of such combining-cone (n) is formed in one
with the delivery-cone (o) and is screwed into the casing (a) and furnished with a
collar (¹) and flanges (2) to close the opening formed for the passage of such
combining-cone and delivery-cone (o) through the partition separating the
passage (s) from the passage (). A removable cap (03) screwed into the casing (a)
serves to close the opening through which the combining-cone and delivery-
cone (o) are inserted into position. The back-pressure or non-return-valve (p) is
arranged to act in conjunction with a seating (1) in a plug or removable part (2)
screwed into the casing (a) so as to be removable therefrom, and a cap (7) screwed
upon the said plug or part (p2) serves to lock it in position. The plug (2) is
formed with holes (74) to communicate with the passage (r) and allow the com-
bined steam and water to pass from the passage (r) to the back-pressure or non-
return-valve (p) and passage (/). The back-pressure or non-return-valve (g) is
arranged to act in conjunction with a seating formed around a hole formed in the
partition forming part of the casing (a) and separating one part of the passage (t)
from the other part thereof and is formed with a stem guided by a hole formed
in a plug (r) screwed into the casing (a) and serving to close the opening through
which the back-pressure or non-return-valve (9) is inserted into position.
Another form of combination-injector constructed according to this part of my
invention is illustrated in Figs. 5, 6, 7 and 8 of the accompanying drawings,
Fig. 5 being a front elevation of an injector, Fig. 6 a vertical section taken on
the plane indicated by the line (6-6) of Fig. 5, Fig. 7 a vertical section taken
on the plane indicated by the line (7-7) of Fig. 6 and Fig. 8 being a horizontal
section on the plane indicated by the line (8--8) of Figs. 5, 6 and 7. The injector
illustrated in Figs. 5, 6, 7 and 8 only differs from that illustrated in Figs. 1, 2, 3
and 4 in that instead of being supplied through a passage (i) formed in the
casing (a) steam is arranged to be supplied by means of a pipe connected by a
union (y) to the casing (a) of the injector.
Another form of combination-injector constructed according to this part of my
invention is illustrated in part in Figs. 9, 10 and 11 of the accompanying draw-
ings, Fig. 9 being a front elevation, Fig. 10 being a partial horizontal section
taken on the plane indicated by the line (10-10) of Fig. 9 and Fig. 11 a partial
vertical section taken on the plane indicated by the line (11-11) of Fig. 10.
The injector of which part is illustrated by Figs. 9, 10 and 11 only differs from
that illustrated in Figs. 5, 6, 7 and 8 in that instead of being arranged in the
form of a valve capable of being moved on and off a seating, the valve (c) employed
to regulate the supply of water to the injector is arranged in the form of a hollow
cylinder (2) with a slit (¹) extending around a part of its circumference and capable
of being brought into more or less full communication with the passage (2)
leading to the entrance to the combining-cone (n) or moved out of communication
therewith while the interior of such hollow cylinder (2) remains in communication
with the pipe provided for the supply of water to the injector.
Another form of combination-injector constructed according to this part of my
invention is illustrated in Figs. 12, 13, 14 and 15 of the accompanying drawings,
Fig. 12 being a front elevation of the injector, Fig. 13 being a vertical section
taken on the plane indicated by the line (13-13) of Fig. 12, Fig. 14 being a
vertical section taken on the plane indicated by the line (14-14) of Fig. 13, and
Fig. 15 being a horizontal section taken on the plane indicated by the
line (15--15) of Figs. 12, 13 and 14. The injector illustrated in Figs. 12, 13, 14
and 15 only differs from that illustrated in Figs. 5, 6, 7 and 8 of the accompanying
drawings in that the valve (c) to regulate the supply of water is formed upon a
spindle (u) arranged with its axis horizontal and arranged to act in conjunction
with a seating (¹) around the communication between the interior of the projec-
tion (D) and the interior of the casing (a) and in that the valve (g) to shut off

page_text: the supplementary overflow-opening (f) from the ordinary overflow-opening (e)
and the external air is arranged with its axis horizontal and provided with a
spring (g) tending to move it into contact with the seating in conjunction with
which it acts.
Figs. 16, 17, 18 and 19 illustrate another form of combination-injector con-
structed according to this part of my invention, Fig. 16 being a front elevation,
Fig. 17 being a vertical section taken on the plane indicated by the line (17-17) of
Fig. 16, Fig. 18 being a vertical section taken on the plane indicated by the
line (18-18) of Fig. 17, and Fig. 19 being in part a horizontal section taken on
the plane indicated by the line (19-19) of Fig. 16 and in part a horizontal section
taken on the plane indicated by the line (19-192) of Figs. 17 and 18. In the
injector illustrated in Figs. 16, 17, 18 and 19 the union (6) for the connection to
the projection (D) of the pipe by means of which water is to be led to the injector
is placed with its axis horizontal, the scale to indicate the position into which
the valve is to be turned in order to limit the supply of water in the manner
requisite is formed upon the gland (w) in which the stem (u) of the valve (c) is
arranged to be screwed the delivery-cone (o) is inserted in an opening which is
formed in the lower part of the combining-cone (n) and closed by the cap (03)
employed to close the opening by means of which the combining-cone (n) and
delivery-cone (o) are inserted into the casing (a), the outlet (d) from the ordinary
overflow-opening (e) and from the supplementary overflow-opening (f) is formed
in a special projection (F) formed upon the casing (a) and formed internally with
screw-threads for the connection of a pipe to convey away liquid or steam escaping
from the ordinary overflow-opening (e) or supplementary overflow-opening (f),
the back-pressure or non-return-valve (g) to shut off the supplementary overflow-
opening (f) from the ordinary overflow-opening (e) is provided with a spring (g¹)
arranged within its stem and the back-pressure or non-return-valve (2) between
the delivery-cone (o) and the boiler to which the injector is to be connected is
arranged above its seating (¹) and provided with a stem guided by means of the
plug or cap (p³) employed to close the opening through which the valve (p) is
placed in position. Except in so far as has been hereinbefore described the
injector illustrated in Figs. 16, 17, 18 and 19 is similar to the injector illustrated
in Figs. 5, 6, 7 and 8.
In the injectors illustrated in Figs. 1, 2, 3 and 4, Figs. 5, 6, 7 and 8 and
Figs. 12, 13, 14 and 15 the seatings (¹) in conjunction with which the respective
back-pressure or non-return-valves (p) act, are removable from the casings but in
the injector illustrated in Figs. 16, 17, 18 and 19 the seating in conjunction with
which the back-pressure or non-return-valve (2) acts is not removable from the
casing (a) of the injector but is formed in the said casing (a). Instead of being
screwed into position the steam-nozzles (m) of the injectors illustrated in Figs. 5,
6, 7 and 8, Figs. 12, 13, 14 and 15 and Figs. 17, 18 and 19 may be turned and
provided with collars so as to be capable of being simply inserted in holes formed
to receive them in the casings of the injectors with which they are to be employed.
The hereinbefore described arrangement of valve to adjust the supply of and
shut off steam from the injector and the herein before described arrangements for
enabling the back-pressure-valve to be removed from the injector while such
injector remains attached to a steam-boiler containing steam under pressure and
the herein before described arrangements in which the provision for the connec
tion of a pipe by which water may pass to the injector and the valve to regulate
the admission or shut off the supply of water may be provided or arranged upon
or in one projection upon the casing of the injector while the opening for the
escape of water from the ordinary overflow-opening and the supplementary over-
flow-opening if there be one and the valve to be used with the supplementary
overflow-opening if there be one may be arranged in a second projection upon
the said casing, may be applied to injectors of other kinds as well as to com-
bination-injectors and form in themselves distinct parts of my invention.
Figs. 20, 21 and 22 illustrate one application of this part of my invention to

page_text: an injector which is not a combination-injector, Fig. 20 being a front elevation,
Fig. 21 a horizontal section taken on the plane indicated by the line (21-21) of
Fig. 20 and Fig. 22 a vertical section taken on the plane indicated by the
line (22-22) of Fig. 21. In the injector illustrated in Figs. 20, 21, and 22 as
in those illustrated by Figs. 5, 6, 7 and 8, Fig. 9, Figs. 12, 13, 14 and 15 and
Figs. 16, 17, 18 and 19, a pipe connected to the casing (a) by means of a union (y)
is arranged for the supply of steam and in order that the injector may receive
water, a pipe which is provided with any suitable tap or cock for the regulation
of the supply of water is connected by means of a union (b) to a branch formed
upon the casing (a) and the outlet of the delivery-tube (o) is arranged to be
connected by means of a union or collar screwed upon the casing (a) to a pipe
provided with a back-pressure or non-return-valve and connected to the steam-
boiler to which water is to be supplied. Except in so far as I have herein before
described it, the construction of the injector illustrated in Figs. 20, 21 and 22
needs no further description.
Fig. 23 is a horizontal section taken on the plane corresponding to that on which
the horizontal section Fig. 21 is taken, but illustrating another arrangement of
back-pressure or non-return-valve which may be employed in an injector con-
structed according to this part of my invention and may also be employed in the
injectors illustrated in Figs. 24, 25, and 26, Figs. 27, 28 and 29 and Figs 30, 31
and 32 to be hereinafter described. The back-pressure or non-return-valve (g)
illustrated in Fig. 23 is provided with a stem (92) in the form of a cage and
arranged to be slidden in a hole formed in the casing (a) of the injector and a
spiral spring (g¹) is arranged in the interior of the cage.
Figs. 24, 25 and 26 illustrate another application of this part of my invention
to an injector which is not a combination-injector, Fig. 24 being a front elevation
Fig. 25 a horizontal section taken on the plane indicated by the line (25-25) of
Fig. 24, and Fig. 26 a vertical section taken on the plane indicated by the
line (26-26) of Fig. 25. Except for being arranged to be connected by means
of flange-joints instead of unions to the pipes by which steam and water are to be
supplied to the injector and the pipe by which water supplied by means of the
injector is to be conducted therefrom to the steam-boiler to which it is to be
supplied, the injector illustrated by Figs. 24, 25, and 26 is similar to that illus-
trated by Figs. 20, 21, 22, and 23.
A further part of my invention relates to the steam-nozzles of injectors and
has for its object to simplify the construction and working of injectors and enable
the steam-nozzle of an injector to be combined with a valve by means of which
the supply of steam to the injector may be regulated or shut off and also enable
the steam-nozzle to be used as a means of regulating the relative proportions
between the area of the passage for the supply of steam and the area of the
passage for the supply of water and also to enable one steam-nozzle to be readily
replaced by any of a number of similar steam-nozzles and enable any of a number
of similar steam-nozzles to be employed in any of a number of similar injectors.
According to this part of my invention I provide the steam-nozzle of an injector
with a spindle which is screwed and provided with a handle so that it may be
turned and by being turned be moved longitudinally and in being turned turn
the steam-nozzle and move it lengthwise. I provide the said spindle with a valve
arranged to act in conjunction with a seating which is provided in the casing.
The steam-nozzle is provided with holes which communicate with the interior
thereof and are surrounded by a cavity formed in the casing of the injector so that
as soon as the said valve is moved from the seating in conjunction with which it
is arranged to act steam passing through such seating shall have full access to
the central passage of the steam-nozzle. The steam-nozzle being capable of longi-
tudinal movement enables the relative areas of the openings or passages for
steam and water to be adjusted. I may provide any suitable scale and index_so
that the steam-nozzle may readily be moved into the position suitable for the
supply of water to a steam-boiler containing steam at any particular pressure.

page_text: One form of injector constructed according to this part of my invention is illus-
trated in Figs. 27, 28 and 29 of the accompanying drawings, Fig. 27 being a
front elevation, Fig. 28 a horizontal section taken on the plane indicated by the
line (28 28) of Fig. 27 and Fig. 29 a vertical section taken on the plane indicated
by the line (29-29) of Fig. 28. In the injector illustrated in Figs. 27, 28 and
29 the steam-nozzle (m) is provided with a stem. (m²) connected to a handle (m³)
and capable of being screwed in a plug (mt) secured in the casing (a) and provided
with a stuffing-box or gland (m³) and a valve (k) formed on the said stem (m²) is
arranged to act in conjunction with a seating around a hole formed in a partition
arranged in the casing (a) and serves to shut off from or allow steam to pass to a
cavity (m) formed in the said partition. Holes (m) are formed in the steam-
nozzle (m) to communicate with the said cavity (m) and allow steam supplied to
such cavity (m) to issue from the orifice of the steam-nozzle (m). The steam:
nozzle (m) is made of such length that when the valve (k) is in contact with the
seating with which it is used the lower end (ms) of the steam-nozzle (m) will be
in contact with the inner surface of the upper part (nl) of the combining-cone (n)
so as to prevent water from passing therein from the passage (c2) and so that as
the valve () is moved away from the said seating the steam-nozzle (m) will allow
gradually more and more water to pass from the passage (2) into the combining-
cone (n). In order that the position of the steam-nozzle (m) and consequently
the supply of water may be readily adjusted in accordance with the pressure of the
steam used to operate the injector. a pointer is provided upon the handle and a
scale of steam-pressures is provided upon the plug (m) so that when the pointer
is brought to the number or mark corresponding to the pressure of the steam
then supplied to the injector, the steam-cone (m) shall be in the position requisite
for the proper working of the injector.
Another form of injector constructed according to this part of my invention is
illustrated in Figs. 30, 31 and 32 of the accompanying drawings, Fig. 30 being a
front elevation. Fig. 31 a horizontal section taken on the plane indicated by the
line (31-31) of Fig. 30, and Fig. 32 a vertical section taken on the plane indicated
by the line (32-32) of Fig. 31. Except in that the pipes for the supply to the
injector of steam and water and the pipe to conduct away from the injector the
water forced thereby are intended to be connected by means of flanged joints
instead of by unions, the injector illustrated in Figs. 30, 31 and 32 is similar to
that illustrated in Figs. 27, 28 and 29.
Furthermore, in any case in which it may be considered desirable I may apply a
movable steam-nozzle provided with a valve and a spindle in the manner illus-
trated in Figs. 27, 28 and 29 and Figs. 30, 31 and 32 to any of the injectors
herein before described in reference to Figs. 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11,
12, 13, 14, 15, 16, 17, 18 and 19.
A further part of my invention relates to the combining-cones and delivery-
cones of injectors and has for its object to simplify the construction and working
of injectors and enable the combining and delivery-cones of an injector to be
readily replaced by any of a number of similar combining and delivery-cones and
enable any of a number of similar combining-cones and delivery-cones to be
employed in any of a number of similar injectors.
According to this part of my invention I form the combining-cone of an injector
in one piece with the delivery-cone thereof and in order to secure the combined
combining-cone and delivery-cone in the casing of the injector in which it is to be
employed I provide a screw-thread and only one faced joint so as to enable tight
joints to be readily made at any time.
This part of my invention is illustrated by Figs. 2 and 3. Figs. 6 and 7. Figs. 13
and 14, Figs. 17 and 18, Fig. 22, Fig. 26. and Figs. 29 and 32 of the accom-
panying drawings which all illustrate combining-cones (n) each formed in one
piece with the delivery-cone (o) used therewith and formed with a screw-thread
and one faced joint (02) so that tight joints between the said combining-cones (n)
and delivery-cones (o) and the casing (a) in which they are employed may be

page_text: readily made and so that any of a number of similar combining-cones and delivery-
cones may be employed in any of a number of similar injectors."
A further part of my invention also relates to the combining-cones and delivery-
cones of injectors and has for its object to enable such small quantities of water
as may escape from the ordinary overflow-opening of an injector during the
working of such injector, to be drawn back into the ordinary overflow-opening
so that during the working of the injector there shall be no escape of water from
the outlet provided in the casing of the injector for the escape of fluid issuing from
the ordinary overflow-opening."
According to this part of my invention I form the combining-cone of an injector
in one piece with the delivery-cone thereof and in the combined combining and
delivery-cone I form the ordinary overflow-opening by forming a simple hole such
as the hole e shown in Figs. 2, 3, 6, 7, 13, 14, 22, 26, 29 and 32 of the accom-
panying drawings and in the casing of such injector I form a cavity such as the
cavity s shown in the said Figs. 2, 3, 6, 7, 13, 14, 22, 26, 29 and 32 in such
manner that such cavity encloses the ordinary overflow-opening e aforesaid and I
form in the injector also a small hole or opening 50 as shown in the said Figs. 3,
7, 14, 22, 26, 29 and 32 so as to place the said cavity s in communication either
directly as indicated in Figs. 3, 7 and 14 or by means of an annular passage 51 as
indicated in Figs. 21, 22, 23, 25, 26, 28, 29, 31 and 32 with the overflow-outlet d.
In every instance the relative position of the cavity s and small hole or opening 50
and the annular passage 51, if there be one leading to the overflow-outlet d, is so
arranged in the construction of the injector according to the position in which it
may be intended to be placed when in use that when placed in such position liquid
issuing from the ordinary overflow-opening e can not escape from the injector
forthwith but only when the quantity has become more than sufficient to fill the
cavity s aforesaid and by this arrangement I ensure that much if not all the liquid
which may escape from the ordinary overflow-opening e of the injector when
working will be trapped in the cavity s and drawn back through the ordinary
overflow-opening e by the jet of liquid passing through the injector and passed
forward into the boiler to which the injector is connected.
In some cases to enable the supply of water to injectors to be readily adjusted
in accordance with the pressure of the steam in the steam-boilers in conjunction
with which such injectors are applied, I may form in the casing of an injector a
passage surrounding the steam-nozzle which passage is itself surrounded by an
outer chamber or annular passage and connect to one side of such outer chamber
the pipe by means of which water is to be supplied to the injector and at the
opposite side or at any other part of such chamber which may be considered suit-
able in any case I provide a hole or entrance leading to the mouth of the combin-
ing-cone of the injector and form around such hole or entrance a seating in con-
junction with which is arranged a valve provided with a screwed spindle or other
means by which it may be moved and an index by means of which its position
may be indicated.
Injectors constructed according to the several parts of my invention may be
arranged to work in a vertical horizontal or other position.
Although I have herein before described my invention as applicable to injectors
for supplying water to steam-boilers I would have it understood that my invention
is also applicable to other injectors for use in the supply of water or other liquids.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be employed, I declare that what I
claim is:-
1. The several improved combination-injectors hereinbefore described in refer-
ence to Figs. 1, 2, 3, and 4, Figs: 5, 6, 7 and 8, Figs. 9, 10, and 11, Figs 12, 13,
14 and 15 and Figs. 16, 17, 18 and 19 of the accompanying drawings all sub-
stantially as hereinbefore described.
2. The combination with an injector whether it be or be not a combination-

page_text: injector of a valve for the regulation and shutting off of the supply of steam
arranged in the casing of the injector substantially as and for the purposes herein-
before described with reference to and illustrated, by Figs. 1, 2, 3 and 4 of the
accompanying drawings.
3. The combination with an injector whether it be or be not a combination-
injector of a back-pressure-valve arranged in the delivery-passage of the injector
and made to act in conjunction with a seating which is removable from the casing
of the injector substantially as herein before described with reference to and illus-
trated by Figs. 1, 2, 3 and 4, Figs. 5, 6, 7 and 8 and Figs. 12, 13, 14 and 15 of
the accompanying drawings.
4. A combination-injector or other injector with its casing and other parts so
arranged that the provision for the connection of a pipe by which water may
pass to the injector and the valve to regulate the admission or shut off the supply
of water are arranged or provided in or upon one projection upon the casing
of the injector and the opening for the escape of water from the ordinary-overflow-
opening and the supplementary overflow-opening if there be one and the valve
to be used with the supplementary overflow-opening if there be such supple-
mentary overflow-opening is or are arranged in a second projection upon the said
casing substantially as herein before described with reference to and illustrated in
and by Figs. 1, 2, 3 and 4, Figs. 5, 6, 7 and 8, Figs. 9, 10 and 11 and Figs. 12,
13, 14 and 15 of the accompanying drawings.
5. An injector, the steam-nozzle of which is provided with a spindle screwed
and provided with a handle so that the steam-nozzle may be turned and moved
lengthwise and with a valve arranged to act in conjunction with a seating pro-
vided in the casing of the injector for the purpose and substantially as herein-
before described with reference to and illustrated in and by Figs. 27, 28 and 29
and Figs. 30, 31 and 32 of the accompanying drawings.
6. An injector with the combining-cone formed in one piece with the delivery-
cone and secured in the casing of the injector by means of a screw-thread and
only one faced joint for the purposes and substantially as herein before described.
7. An injector with the ordinary overflow-opening arranged in a cavity in
communication with a chamber with an outlet formed in such position according
to the position in which the injector may be fixed for use that liquid escaping
from the ordinary-overflow-opening cannot escape from the injector forthwith but
only when a quantity sufficient to more than fill the said cavity has collected for
the purpose and substantially as herein before described.
Dated this Thirty-first day of December 1898.
HOWARD CHEETHAM,
Manchester,
Agent for Applicant.