Improvements in and Pertaining to Injectors.
Year: 1888

page_text: Date of Application, 26th May, 1888
Complete Specification Left, 25th Mar.. 1889
Complete Specification Accepted, 25th May, 1889
Improvements in and Pertaining to Injectors.
1, ROBERT GRUNDY BROOKE of 18 St. Mary's Road, Crumpsall, Manchester in
the County of Lancaster Engineer do hereby declare the nature of this invention
to be as follows:-
My invention relates to injectors in which it is necessary or desirable to effect
regulation of both steam and water; also to means whereby injectors of the kind
technically known us "
non lifters" (ie. injectors that require to be placed below the
level of their water supply) may be made to lift their feed water. To enable an
injector to be adjusted from time to time to work at different steam pressures and
different positions relative to the feed water supply I construct it so that by one
movement the necessary regulation can be effected of both steam and water passages.
For this purpose I employ a spindle fixed in relation to the combining nozzle and
placed in the interior of a moveable steam nozzle so as to serve for altering the area of
its outlet. The steam nozzle alone is moveable longitudinally. The end of the spindle
is conical and it is fixed in such a way that as the steam nozzle is withdrawn from the
combining cone in order to increase the water space its narrowest internal diameter
approaches the conical end of the spindle and so the steam exit is lessened. Moving
the steam nozzle in the contrary direction has the effect of enlarging the steam
admission and closing the water space. By suitably proportioning the alteration of
area of the water and steam spaces due to a given traverse of the steam nozzle, the
desired regulation is effected. It may be explained that a low steam pressure requires
less water and more steam while more water and less steam are required as the
pressure rises. In a single adjusting injector the steam area reumains the same
throughout if the water is regulated, or, if the steam only is regulated the water area
remains the same throughout. In one construction of such an arrangement the spindle

page_text: and a cap are in one and always screw down to the same position relative to the
main casting. The position of the combining nozzle as already stated is also
fixed. The steam nozzle is inoveable and is adjusted by removing the cap when the
nozzle is screwed up or down into the required position and the cap and spindle are
replaced. If the steam nozzle is unscrewed in order to increase the water space
between it and the combining nozzle the conical end of the spindle becomes simul-
taneously inserted into the narrowest diameter of the steam nozzle upon the cap being
replaced and thus at the same time the admission of steam is reduced and a double
regulation produced.
The nozzles may he those of an ordinary injector or of an automatic re-starting
injector. In a modification the spindle is fixed but is turned from the outside by a
hand wheel whereby the steam nozzle is screwed up or down thus effecting the
required regulation. If necessary the face next the boss of the hand wheel may be
marked to indicate various steam pressures etc. and a mark or pointer be fixed on the
said boss.
Another part of my invention has for object to adapt a non-lifting injector-such as
an exhaust injector to take its water supply from a point below it. For this purpose
a small supply of water say in a priming tank is provided above the injector and
connected to the water inlet of the injector by a pipe in the ordinary manner.
This
pipe is furnished with a cock whereby the supply from overhead may be discontinued.
At a point between the cock and the injector is joined into the aforesaid pipe another
pipe leading down into the water supply below the injector from which it is desired to
draw the supply at the bottom end of this pipe is placed a foot valve whereby water
is-prevented from returning from-the-ligher to the lower level. To start the injector
water is admitted from the overhead or "priming" tank by means of the cock; the
water from this tank will at the same time fill the suction pipe leading to the lower
water supply. As soon as the injector is at work the cock may be shut and the supply
from the priming tank be discontinued as the injector will now proceed to draw its
supply up the suction-pipe from the lower source."
The foot valve prevents the water from the upper water supply from running down
the suction pipe after having once filled it instead of into the injector when it is being
started and also prevents the suction pipe from emptying itself when the injector
is not working.
I sometimes use a special construction of valve hereinafter described which, when
employed in connection with the first described arrangement, is placed on the water
pipe. The action of this valve is such that as soon as the injector is started to work
from the upper water supply that supply is automatically shut off by the valve and the
injector so caused to draw its supply from below. The valve when so applied is open
when the injector is not at work so that as soon as the water cock controlling the
upper supply is opened water from this source is free to flow to the injector. As soon
as the injector starts working the pressure of water in the delivery pipe of the injector
is caused by a suitable passage to act upon and move a piston or diaphragm which in
turn closes the valve and shuts off the supply from the upper tank. Should the
injector stop working the pressure in the delivery pipe and consequently on the piston,
will cease, the valve will open and (in the case of an automatic re-starting injector
only) the injector will be restarted from the upper supply, the valve being again
automatically closed as soon as the injector begins to work. By the use of this valve
no more water is taken from the upper supply than is requisite for starting the
injector.
In one arrangement the valve body has an inlet for water from overhead, a passage
in connection with the injector and a perforated diaphragm with valve seat; also a
small cylinder in connection with the delivery pipe and a piston in this cylinder. The
valve proper has a stem or spindle. The normal position is with this valve open.
Water from the upper tank enters the inlet, passes the valve and proceeds to the
injector. A continuation of the valve stem passes through a hole in the small cylinder
end and rests on the piston. If necessary a spring is used to keep the valve open.

page_text: When the injector is at work pressure from the delivery pipe enters the small cylinder
by means of a suitable connection presses up the piston and so closes the valve causing
the injector to draw its supply from the lower level.
W. LLOYD WISE,
Per F. J. Brougham,
46, Lincoln's Inn Fields,
Agent for the Applicant.
I, ROBERT GRUNDY BROOKE of 18, St. Mary's Road, Crumpsall, Manchester
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 :-
"
22
My invention relates to injectors in which it is necessary or desirable to effect
regulation of both steam and water; also to means whereby injectors of the kind
technically known as non lifters (ie. injectors that require to be placed below the
level of the supply) may be made to lift their feed water. To enable an injector
to be adjusted from time to time to work at different steam pressures and different
positions relative to the feel water supply I construct it so that by one movement the
necessary regulation can be effected of both steam and water passages in the nozzles.
For this purpose 1 employ a spindle fixed in relation to the combining nozzle and
placed in the interior of a moveable steam nozzle so as to serve for altering the
area of its outlet. The steam nozzle alone is moveable longitudinally. The end of
the spindle is so fashioned, and the spindle is fixed in such a way that as the
steam nozzle is withdrawn from the combining cone in order to increase the water
space its narrowest internal diameter approaches the conical or tapered end of the
spindle and so the steam exit is lessened. Moving the steam nozzle in the
contrary direction has the effect of enlarging the steam admission and closing.
the water space.
In some cases it is desirable to increase the water and steam spaces or decrease
them at the same time and to accomplish this I carry the central spindle through
and beyond that narrow portion of the steam nozzle where the steam area is
regulated and so taper the end of the spindle that the steam area in the nozzle
is increased as the steam nozzle is withdrawn from the combining tube.
By suitably proportioning the alteration of area of the water and steam spaces due
to a given traverse of the steam nozzle, the desired regulation is effected.

page_text: It may be explained that generally a low steam pressure requires less water and
more steam while more water and less steam are required as the pressure rises. In
what is known as a single adjusting injector in which the adjustment is also
accomplished by one movement the steam area remains the same throughout if it is
the water that is regulated or, if it is the steain only that is regulated then the
water area remains the same throughout but in no way is such single adjustment as
efficient as the adjustment of both steam and water.
In one arrangement of my invention the spindle and the cap are in one and always
screwed down to the same position relative to the main casting. The position of the
combining nozzle as already stated is also fixed. The steam nozzle is moveable and is
adjusted by removing the cap when the nozzle is screwed up or down into the required
position the cap and spindle are then replaced. If the steam nozzle is screwed
away from the combining nozzle the water space between it and the combining
nozzle is increased and upon the cap and spindle being replaced the conical end
of the spindle becomes simultaneously further inserted into the narrowest diameter
of the steam nozzle and thus at the same time the admission of steam is reduced and
a double regulation produced.
The nozzles may in this and in other arrangements according to my invention be
those of an ordinary injector or of an automatic re-starting injector. In another
modification no cap is used as above described. The steam nozzle is capable of
being screwed up or down so as to alter its position relative to the combining
nozzle and to the spindle. The spindle is fastened in above the steam nozzle and
when in its place always occupies the same position. It is arranged so that steam
from a pipe can pass straight past it in the direction of its axis. In a modification
the spindle is fixed longitudinally as before in relation to the combining nozzle but
is turned from the outside by a band wheel wheroby the steam nozzle is screwed up or
down thus effecting the required regulation. If necessary the face next the boss of
the hand wheel inay be marked to indicate various steam pressures &c. and a mark-or
pointer be fixed on the said boss.
In all cases the end of the spindle may be of any suitable shape as circumstances
may require.
Another part of my invention has for object to adapt a non-lifting injector such as
an exhaust injector to take its water supply from a point below it. For this purpose
a small supply of water (say in a priming tank) is provided above the injector and
connected to the water inlet of the injector by a pipe in the ordinary manner.
This
pipe is furnished with a cock whereby the supply from overhead may be discontinued.
At a point between the cock and the injector is joined into the aforesaid pipe another
pipe leading down into the water supply below the injector from which it is desired
to draw the supply at the bottom end of this pipe is placed a foot valve whereby
water is prevented from returning from the higher to the lower level. To start the
injector water is admitted from the overhead or "priming" tank by means of the
cock; the water from this tank will at the same time fill the suction pipe leading to
the lower water supply. As soon as the injector is at work the cock may be shut
and the supply from the priming tank be discontinued as the injector will now proceed
to draw its supply up' the suction pipe from the lower source.
The foot valve prevents the water from the upper water supply from running down
the suction pipe after having once filled it instead of into the injector when it is
being started and also prevents the suction pipe from emptying itself when the injector
is not working.
1 sometimes use a special construction of valve hereinafter described which when
employed in connection with the just described arrangement, is placed on the water
pipe. The action of this valve is such that as soon as the injector is started to work
from the upper water supply that supply is automatically shut off by the valve and
the injector so caused to draw its supply from below. The valve when so applied is
open when the injector is not at work so that as soon as the water cock controlling
the upper supply is opened water from this source is free to flow to the injector.
As soon as the injector starts working the pressure of water in the delivery pipe of

page_text: the injector is caused by a suitable passage to act upon and move a piston or
diaphragm which in turn closes the valve and shuts off the supply from the upper
tank. Should the injector stop working the pressure in the delivery pipe and
consequently on the piston, will cease, the valve will open and (in the case of an
automatic re-starting injector only) the injector will be restarted from the upper
supply, the valve being again automatically closed as soon as the injector begins to
work. By the use of this valve no more water is taken from the upper supply than
is requisite for starting the injector.
In one arrangement the valve body has an inlet for water from overhead a
passage in connection with the injector and a perforated diaphragm with valve seat;
also a small cylinder in connection with the delivery pipe and a piston in this cylinder.
The valve proper has a stem or spindle. The normal position is with this valve open.
Water from the upper tank enters the inlet, passes the valve and proceeds to the
injector. A continuation of the valve stem passes through a hole in the small cylinder
end and rests on the piston.
If necessary a spring is used to keep the valve open. When the injector is at work
pressure from the delivery pipe enters the small cylinder by means of a suitable
connection presses up the piston and so closes the valve causing the injector to draw
its supply from the lower level.
Referring to the accompanying drawings Fig. 1. shews in section so much of an
injector as is necessary to illustrate the application of my invention theroto.
A is part of the body and casing of a injector of which a is part of the upper end
of the combining nozzle; is the steam nozzle screwed in the body at c and arranged
so as to slide tightly in a bearing d between the steam chamber e and water chamber f.
In this arrangement and also in other arrangements according to my invention steam
might if desired he admitted into the chamber and water into the chamber e. The
screwed part of the nozzle projects beyond the body so as to receive a cap B.
Forming part of the cap B is a spindle C projecting down into that part of the steam
nozzle the diameter of which finally determines the admission of steain (or other fluid)
through it into the injector. This portion of the nozzle 1 will call but its exact
position in the nozzle depends upon the construction and shape of the nozzle.
The spindle has a conical end c which projects more or less towards or into the
nozzle at according to the position of the nozzle from time to time. In the
drawings the nozzle is shown at its lowest point. The annular water area a¹ is at
its least opening and the steam area d' at its greatest. This would be the requisite
position of the parts under the circumstances where the steam pressure was at the
lowest point at which it was intended the injector should work. If a greater steam
pressure than that just referred to should be employed, then more water and less
steam would be required. This condition is attained by removing the cap Band
screwing back the nozzle & sufficiently to give the increased water space required.
When the cap B is replaced the spindle c resumes its original position but as the
nozzle and consequently its contracted part e¹ has been moved towards the point of
the spindle the conical end c¹¹ of c becomes further inserted into c¹ and so lessens the
steam area. In this way the requisite regulation may be effected from time to time
as required. By the terms steam and water space I mean the area in a nozzle or
between two nozzles by which the quantity of steam, water or other fluid entering
through or between such nozzles for combination, is finally determined.
Fig. 2. illustrates an arrangement in which the cap shewn in Fig. 1. is not
employed. The steam cone 6 is screwed so as to move up or down in the same
manner as in Fig. 1. and the spindle C has when in its place a definite fixed
position. But instead of forming part of a cap the spindle is attached by means of
arms (see Fig. 2) to a circular ring, and the steam passes through the spaces between
these arms into the injector. The circular ring provides the means for attaching the
spindle to the injector. The parts corresponding to similar parts in Fig. 1. are
similarly lettered.
In Fig. 3. there is shewn an arrangement similar to that in Fig. 1. with
the exception that the spindle is prolonged and taken through a stuffing box

page_text: to the outside of the injector, where by means of a handle or key it may be rotated.
The spindle is square at that part which passes through the upper portion of the
steam nozzle band fits into a correspondingly shaped part of the nozzle. Consequently
when the spindle is rotated the nozzle is forced to turn round and by means of the
thread c to move endwise so as to produce the differential regulations previously
described. The spindle itself does not move longitudinally and is provided with a
collar k, or any other efficient equivalent to prevent any such motion. In lieu of
being made square it may be connected to the nozzle by a feather key or by any
equivalent device.
In the interior of the steam nozzle the spindle has webs near its conical end in
order to ensure its being central.
It is not always necessary to turn the steam nozzle round in order to give it a
longitudinal motion and I sometimes form a thread on the spindle to fit in a corre-
sponding thread in the nozzle. The nozzle is prevented from turning round by a
key let into the casing, or by having a flat side or sides on its exterior, and is thus
forced to move longitudinally when the spindle is turned round. An arrangement
according to this method is shown in Fig. 5.
Fig. 4. shows an arrangement similar to Fig. 3. with the exception that the spindle C
is prolonged through the steam nozzle and tapered in the opposite direction with the
result, which will be seen at once by reference to the drawing, that the longitudinal
movement of the steam nozzle increases or decreases the steam and water areas at
the same time instead of increasing one and decreasing the other. This modification
alters the relative positions of c¹ and e" as shown in Figs. 1. and 3.
Fig. 5. shows an application of my invention in combination with one of the well
known arrangements for making an ordinary injector lift its feed water. The
spindle fits closely into the narrow part of the steam nozzle and is provided with a
central hole o through which a jet of steam is-admitted as soon as the steam nozzle b
leaves the valve and before the parallel portion of the spindle has been withdrawn.
from the narrow part c¹ of the steam nozzle. By means of this small jet a vacuum is
created and the injector caused to lift its water as is well known.
.
Instead of passing through the small hole o the steam may pass round the spindle
at in the manner also well known. In combination with the arrangement for
moving the steam nozzle illustrated in Figs. 5 and 6, there is shewn a method of
indicating the working position of the spindle for different pressures in injectors
made according to my invention. By making the steam nozzle with a quick pitched
screw it can be arranged to move the requisite distance for complete regulation by
one turn of the spindle, and the various steam pressures suitable for the various
positions of the spindle during this one turn, are marked on the ring
may either be separate or a part of the injector. On the drawing it is shown
separate.
"
r which
This ring is divided to form a pressure index" showing the position of the
spindle for different pressures. Should the injector have to lift its feed water a con-
siderable height, it would at any given steam pressure require a greater water space
than if the water supply ran to it.
The point of regulation as given on the "pressure index" would not therefore be
correct under all circumstances. I therefore provide in some cases a second or
position index" stating different "lifts and heads " of feed water and by means
of a pointer I set the pressure index to the "position index" according to the lift or
head of water the injector has when fixed. Suppose the injector had to lift its water
10 feet and the steam pressure was 100 lbs. the ring r would be set considerably to
the left in order to bring its position in line with the mark on the "position index
corresponding to 10 ft. lift and the spindle pointer would accordingly have to be
carried so much further to the left to bring it up to the 100 lb. mark on the ring..
Consequently there would be greater water space than would have been the case had
there been no lift.
32
It is sometimes desirable to alter the differential ratio set up between the water and
steam spaces by the movement of the sliding cone in apparatus made according to my

page_text: invention. To this end according to one arrangement I provide means whereby the
ratio between the water and steam spaces may be adjusted and altered although as
horetofore the revolving of the spindle alters the areas of steam and water in a
definite ratio. To do this I pass an inner or secondary spindle through the fixed
spindle that causes the steam nozzle to move up and down. One end of this inner
spindle takes the place of and fulfils the office of that end of the original single
spindle that served to regulate the steam space as described in connexion with the
previous arrangements, but the inner spindle is arranged so that it can be advanced
or withdrawn relatively to the original outer or fixed spindle. By this means the
ratio of areas between the water space at any certain position of the steam spindle
and the steam space at that position can be altered by moving the inner spindle and
the new ratio so determined is not further altered by the revolving of the outer
spindle and the consequent longitudinal motion of the steam nozzle so long as the
position of the inner spindle relative to the outer one is not readjusted.
In fig. 7 M. is the central spindle passing through the outer spindle C. M. and C
work as one and their functions combined are the same as those of C in Fig. 3. With
the exception of this inner spindle the parts in this Fig. 7 are and are lettered the
same as in Fig. 3.
Supposing with the water space fixed at the point shown in the drawing, it is
desired to admit more steam without altering the water space. In the arrangements
previously described this could not be done, as the water and steam spaces were altered
simultaneously. But by an arrangement such as shewn in Fig. 7. the inner spindle M
can be screwed back to alter the ratio between the steam and water spaces. This is
done by removing cap N. and screwing M up or down by means of the screw n.
Upon replacing the cap the injector can be regulated like that in Fig. 3, but with
the difference that the ratio between steam and water areas is at no point the same
as had existed previous to altering the position of the inner spindle; in place of a
complete secondary spindle the end of the main spindle may be made adjustable.
The secondary spindle or spindle end may be adjusted in any other convenient
way.
An application of my invention, to an Ejector condenser is shown in Fig. 8. C is
the main spindle which, as it is revolved by means of a handle moves the steam
nozzle up and down. It can revolve but is fixed longitudinally by the collar k
pressed upon by the packing and gland . M. is a secondary spindle adjustable
from without by means of the band wheel m. By its aid the ratio of the area at C¹
to that at a can be altered. Steam may be admitted at c and water at for this
arrangement may be reversed.
As the steam pressure is practically constant in an exhaust injector it is not always
necessary to provide a graduated adjustment for the steam area. It is sufficient
merely to cut off the steam when this injector is not at work. Such an arrangement
is shewn in Fig. 9. and 98, which are similarly lettered to Fig. 5. The spindle Cends
in a flat valve which serves to open and close the steam passage but not to graduato
it. The graduation of the water area is provided for by the movable nozzle b, which
is prevented from rotating by a key on one side of it.
My above described improvements can be equally well applied to water lifters,
elevators, etc. worked by steam or other condensing fluid; also to air ejectors,
injectors, liquid fuel sprayers and injectors or any jet apparatus where double adjust-
ment is desirable.
In order to render automatic self-starting injectors or other apparatus such as are
provided with flap or hinged supplementary overflow valves capable of being readily
fixed either vertically or horizontally I employ an improved valve wherein the part
carrying the hinge and the valve disc is independent of and revolves round the
seating. As such overflow valves only close by falling on to their seats by their own
weight after the injector has formed its jet, it is necessary that, whether the injector
be placed horizontally with the valve at the side and not at the top of the injector or
vertically, the hinge be at the top. By my improvements I am enabled to swivel the

page_text: valve so that the hinge may be at any time fixed at the top. Figs. 10. and 10
represent such a construction of valve fixed in the body of an injector or other
apparatus.
The piece A carries the hinge M with the pendent C and clappet valve D. The
piece A has a radial slot N concentric with the combined tube and seating E. When
in position it is locked by the screw B. The piece E screws down on to a shoulder
at F and so makes a face for the exclusion of air from the nozzles. Another
shoulder at K prevents the piece A from rising but does not bed on to it sufficiently
tightly to prevent A from easily revolving when the screw B is loosened. The piece A
is only shown as capable of revolving a half-circle, but it might be arranged so that
it could be revolved entirely round.
Fig. 11. shows an exhaust or other nou-lifting injector arranged to draw its feed
water from a lower level than itself. A is the injector, B the steam pipe, Delivery
pipe, D Water pipe; d priming tank: c water cock: e suction pipe: and f foot
valve to retain the water in the suction pipe.
The injector is started to work by water from the priming tank. The Cock c
is then closed and the injector continues to draw water up the pipe e.
prevents this pipe from emptying when the injector is stopped.
The valve f
Instead of the tank d water under pressure, as from a main, may be employed.
Fig. 12. shews the same arrangement with the addition of a valve h for auto-
matically closing the supply from the priming tank d after the injector has got,
to work. It is shewn arranged to he actuated by the pressure from the delivery of
the injector acting through the pipe g, but I wish it particularly understood that an
automatic valve fulfilling the purpose above set forth can be actuated by any available
pressure or vacuum produced by or existing in the injector or by other pressure or
vacuum controlled or caused to operate by any pressure or vacuum produced by or
existing in the injector.
Fig. 13. is a section of one form of an automatic valve adapted for use as described
with reference to valve h in fig. 12.
It comprises a casing A with a passage for water. The water enters at 1 and
passes out at 2. on its way to the injector. Between these passages is a diaphragm 3.
pierced by a hole 4. controlled by a valve 5. When the injector is not working this
valve is held open either by the pressure of water upon it or by a spring 6 or by both.
One side of the valve is in connexion with a piston 7. (or it may be a diaphragm) and
the other side of this piston is in communication by a pipe or passage 8. with some
part of the injector, or its connections, from which a suitable pressure is transmitted
to 8. when the injector is at work. Upon this pressure being set up in 8. the piston
or diaphragm is caused to move up and so close the valve and stop the overhead
water supply, whereon the injector continues to draw its water supply from any other
available source that is provided.
It will be clear that the valve 5. might be connected equally well with a piston
or diaphragm actuated by a vacuum set up in or caused by the action of the injector,
or by the combined action of a pressure and a vacuum set up in or caused by the
action of the injector.
Ι
Where no overhead supply of water is available for the purpose of priming and
starting the injector I cause water to be lifted to the injector from its lower level
supply by means of a steam jet either in or outside the injector casing and arranged
so as to lift the feed water by any of the usual arrangements of nozzles for effecting
this purpose. In this case instead of employing the automatic valve above described
for shutting off the overhead or forced water supply I employ it for shutting off the
steam that works the steam jet elevator or lifter. The steam is in the first instance
admitted by a cock or valve, such as c', and then finds its way through the normally
open automatic valve (fig. 12.) and so starts the water lifter and raises a supply of
water for starting the injector. Upon the injector being started by this raised supply
it causes the valve h to shut and so stops the lifter and the water is then drawn into
the injector by any suitably provided passage.

page_text: A valve so arranged and for the purpose described could be actuated by the same
means as shown and described with reference to Figs. 12 and 13. and such a valve
might be made similarly to that shown and described with reference to Fig. 13.
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. In an injector in which fluids combine or are combined in nozzles, the arrange
ment of a nozzle capable of sliding longitudinally and so proportioned and disposed in
relation to a spindle or part located within the said sliding nozzle and to a second
nozzle that an internal area in the said sliding nozzle and also the area existing
between the exterior of that nozzle and the interior or the end of the second
nozzle will be simultaneously altered by endwise movement of the said sliding nozzle
alone.
2. In an injector in which fluids combine or are combined in nozzles the
combination with a spindle and a nozzle a both fixed so as not to move longi-
tudinally, of a moveable nozzle b the whole so proportioned and arranged that
longitudinal movement of the moveable nozzle will alter simultaneously an area within
itself and also an area between it and the fixed nozzle thereby increasing the one area
and diminishing the other.
3. In an injector in which fluids combine or are combined in nozzles the combination
and arrangement of parts described with reference to and illustrated in Fig. 1 or
modified as in Figs. 2. and 2ª of the drawings annexed.
4. In an injector in which fluids combine or are combined in nozzles the com-
bination of a fixed nozzle, a moveable nozzle, and a spindle able to rotate but not to
move longitudinally, the whole being so proportioned and arranged that rotation of
the spindle will cause the moveable nozzle to move longitudinally and by such
movement to alter an area in the passage through it and at the same time the area
between the outside of itself and the interior or the end of the fixed nozzle.
5. The combinations and arrangements of parts of injectors in which fluids combine
or are combined in nozzles as described with reference respectively to and shewn in
Fig. 3 and in Fig. 4 of the drawings annexed.
6. In an injector in which the spaces for an impelling fluid and fluid to be impelled
are simultaneously regulated by means of a sliding nozzle containing a spindle or rod
fixed relatively to the combining nozzle, an adjustable end to such rod or spindle or an
adjustable secondary spindle whereby the ratio of impelling fluid to fluid to be impelled
may be varied.
7. In an injector in which fluids are combined in nozzles the combination with a
sliding nozzle of a hollow spindle able to rotate but not to move longitudinally and
a second spindle located partly within the hollow spindle and capable of longitudinal
adjustment.
8. In an injector in which fluids are combined in nozzles the arrangement of a
spindle or of combined spindles moving normally as one so that the total length
of spindle can be altered substantially as described with reference respectively to
Fig. 7. and to Fig. 8 of the drawings.
9. In an injector in which fluids are combined in nozzles the combination of a spindle
fixed in a longitudinal sense but capable of rotation, with a nozzle that is caused to
slide by the rotation of the spindle, and which by its sliding movement will cause the
opening or closing as required of a passage through the spindle and at the same time
will open close or alter the area of a passage between itself and the spindle
substantially as described with reference to Figs. 5 and 6 of the drawings.
10. In an injector the combination of a suction pipe provided with a foot valve, and
a second water supply that flows to the injector as and for the purposes set forth.
11. In an injector arranged to receive two liquid supplies one of which flows to it
whereas the other is drawn to the injector, the combination of a stop cock c¹ and
suction pipe with foot valve f substantially as and for the purpose set forth.
B

page_text: 12. In an injector constructed to draw its feed from a level below the instrument
itself after having been primed or started with liquid supplied by gravity or pressure,
a valve arranged to shut off the latter supply after the injector has started the said
valve being automatically actuated by a pressure or vacuum resulting from the working
of the injector.
13. In an injector in which fluids are combined in nozzles the combination with
a water lifter for raising water to the injector of a valve for shutting off the steam
used for lifting such water the said valve being automatically closed when the injector
is started by pressure or vacuum produced by the injector.
14. In combination with an injector which draws its feed from a level below the
instrument itself after having been primed or started by liquid supplied by gravity or
pressure an automatic valve, arranged and operated substantially as described with
reference to Fig. 13. of the drawings.
15. The combinations and arrangements of parts described with reference
respectively to and shewn in Fig. 7 and in Fig. 8 and in Figs. 9 and 9" of the
drawings annexed.
Dated this 23rd day of March 1889.
R. G. BROOKE.
W. Lloyd Wise,
46, Lincoln's Inn Fields, London, W.C.,
Agent for the Applicant.