IMPROVEMENTS IN INJECTORS
Year: 1885

page_text: BYRON CLIFFORD EVERS of 45 Montpelier Road, Kentish Town in the County
of Middlesex Manufacturer do hereby declare the nature of my invention for
IMPROVEMENTS IN INJECTORS to be as follows:-
My invention consists of an improved construction of injectors for utilizing an
auxiliary steam jet to re-enforce and accelerate the effect of a primary jet so as to
render the injector more effective with any pressure of the steam and more reliable
with varying pressures and it is also designed to provide by the improvements
herein described convenient devices for the introduction of the steam into the
primary and auxilary nozzles, for regulating the quantity of water delivered by
the injector at will, and for facilitating the regular and efficient action of the
injector at the overflow: by a simple and cheap arrangement of construction as
hereinafter described. Reference is to be had to the accompanying drawings
forming part of this Specification. Fig. 1. is a sectional elevation of my improved
injector. Fig. 2. is a sectional elevation of nozzle a through the triangular
enlargement of the nozzle.
In the first place I have a nozzle a through the bore of which a jet of steam
discharges from the steam space b into the water chamber c, into which the water
is drawn by the steam jet which condenses by the water surrounding it, and from
which a jet of water is established through the passage of another nozzle d placed
in line with nozzle a and discharging from the water space c into throat e of another
nozzle falso placed in line with nozzles a and d and receiving an annular jet of
steam from the space g and surrounding the water jet which is thereby greatly
accelerated and delivered through nozzle f with great force across the open space in
chamber into the pipe h leading to the boiler.
By the arrangement of all the nozzles in line with each other and with the
delivery pipe h the momentum of the swift jet of water impelled through the
nozzles is fully utilized; and the action is more certain and effective than when
the auxiliary jet is arranged laterally to the primary jet, and the line of motion
of the water abruptly and repeatedly changed.
Nozzle a is constructed as represented in the drawing, upon the stem inclosed in
stuffing-box B, steam chamber band nozzle a¹ and is operated by a screw described on
the stem and the steam from steam chamber b enters the nozzle a by a transverse
hole through the stem communicating with the bore of the nozzle at a convenient
point within chamber b as shown in the drawing: and within the bore of nozzle a¹
next-to steam chamber the stem of the nozzle a is enlarged and nearly triangular in
its transverse section, each of the vertices of the section being rounded at its point of
contact with the circular sides of the bore of nozzle a¹ which encloses and serves as

page_text: a guide to the stem: and the stem is reduced at the right of said enlargement to a
conical form, forming a valve adapted to a concave seat in nozzle a¹: and when
said valve is drawn back by the screw upon the stem the steam flows along the
three sides of the stem, in the spaces between the sides of the triangular stem and
the circular bore of nozzle a¹, and through the valve formed as aforesaid: and the
point of nozzle a is tapered as represented in the drawing, by means of which the
opening of the valve is increased by drawing back the nozzle, and the quantity of
steam discharged through the valve into chamber c increased, and the quantity of
water drawn and forced through the injector, graduated at will.
The valve must
be closed when the injector is started, and until its operation is fully established:
and then while it continues closed the operation of the injector is perfect under all
pressures of steam, without further adjustment: and whenever an increase of the
capasity of the injector becomes necessary, for the supply of a greater quantity of
water to the boiler, the valve may be opened sufficiently to supply the necessary
increase of water.
Steam is supplied to chambers 6 and 9 successively by means of a rotating
valve i located in chamber o arranged laterally with relation to the axes of all the
parts above named. Steam passages m and n are provided, by which chamber b is
connected by passage m with a port under valve i and chamber g connected by
passage n with a port under valve i opening at a little distance obliquely from the
former port and separated from it by an oblique bridge under the valve, the former
port being a little in advance of the latter, whereby, as the valve is rotated, steam
is first admitted by passage m to chamber b: and when the jet of water is
established as above described steam is admitted by the latter port through
passage n to chamber g and nozzle f as described.
The
The stem of valve is provided with a handle A, and is held in line in chamber o
by boxes in the caps at the ends of the chamber, and is provided with a conical
bearing adapted to a concave seat in the cap next to handle A, and is held and
packed in its seat by the pressure of steam in the box at the opposite end of
the stem, or by a spiral spring in the last named box at the end of the stem.
handle A is attached to the stem in such a position that when the handle is turned
to a horizontal position the port connected with passage m is opened admitting
steam into chamber b and nozzle a¹ and when the jet of water appears at over-
flow k the handle is revolved until it comes into contact with stuffing-box B, when
steam is admitted by passage n into chamber g and nozzle f. The jet of steam
from nozzle a is thus re-enforced powerfully by the annular jet of steam entering
nozzle around the point of nozzle d engaging the water and forcing it forward
with such strong and steady action as to ensure constant operation of the injector
under all variations in the pressure of the steam.
Nozzle h has an opening s intersecting the bore of nozzle / horizontally, next to
the throat of the nozzle, and also an annular opening next to nozzle f in chamber l,
for the purpose of affording ample egress for the steam at the moment of starting
the injector; by which the rapid flow of the jet of steam and water is facilitated
without being liable to interruption which would result from a large egress of
steam or water at any one point in nozzle h. The throat of nozzle h beyond
opening s is made a little less is in diameter than the bore of nozzle h next the
opening 8, for the purpose of concentrating the force of the jet of water passing
into pipe h and preventing the return of water into it and through the overflow.
The velocity and force given to the moving water after the reinforcement by the
auxiliary jet is so great that it becomes unnecessary to close the overflow: and the
operation of the injector is rendered very convenient and simple.
1000

page_text: Improvements in Injectors.
BYRON CLIFFORD EVERS, Manufacturer of 12 White Hart Street, Strand
London, do hereby declare the nature of my invention for IMPROVEMENTS IN
INJECTORS and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement:-
My invention consists of an improved construction of injector for utilizing an
auxiliary steam jet to reinforce and accelerate the effect of a primary jet so as to
render the injector more effective with any pressure of the steam, and more reliable
with varying pressures: and it is also designed to provide by the improvements
herein described convenient devices for the introduction of the steam into the
primary and auxiliary nozzles, for regulating the quantity of water delivered by
the injector at will, and for facilitating the regular and efficient action of the
injector at the overflow: by a simple and cheap arrangement of construction: all
as hereinafter fully described.
Reference is to be had to the drawings accompanying my provisional specification.
Fig. 1. is a sectional elevation of my improved injector.
Fig. 2. is a sectional elevation of the nozzle a through the triangular enlargement
of the nozzle.
In the first place I have a nozzle a through the bore of which a jet of steam
discharges from the steam-space b into the water-chamber c, into which the water
is drawn by the steam jet which condenses by the water surrounding it, and from
which a jet of water is established through the passage of another nozzle d placed
in line with nozzle a and discharging from the water-space c into throat e of
another nozzle f also placed in line with nozzles a and d and receiving an annular
jet of steam from the space g and surrounding the water-jet which is thereby
greatly accelerated and delivered through the nozzle f with great force across the
open space in the chamber into the pipe h leading to the boiler.
By the arrangement of all the nozzles in line with each other and with the
delivery pipe h, the momentum of the swift jet of water impelled through the
nozzles is fully utilized: and the action is more certain and effective than when
the auxiliary-jet is arranged laterally to the primary-jet, and the line of motion of
the water abruptly and repeatedly changed.
The nozzle a is constructed (as represented in the drawing,) upon the stem
inclosed in the stuffing-box B, steam-chamber b and nozzle a¹ and is operated by a
screw on the stem: and the steam from the chamber b enters the nozzle a by a
transverse hole through the stem communicating with the bore of the nozzle at
a convenient point within the steam-chamber b, as shown in the drawing 1 and.
within the bore of nozzle a¹ next to steam-chamber b the stem of the nozzle a
is enlarged and nearly triangular in its transverse section, each of the vertices of
the section being rounded at its point of contact with the circular sides of the bore
of the nozzle a₁ which incloses and serves as a guide to the stem and the stem is
reduced at the right of the said enlargement to a conical form, forming a valve

page_text: adapted to a concave seat in the nozzle a¹: and when the said valve is drawn back
by the screw upon the stem the steam flows along the three sides of the stem, in
the spaces between the sides of the triangular stem and the circular bore of the
nozzle a¹, and through the valve formed as aforesaid: and the point of the nozzle a
is tapered (as répresented in the drawing) by means of which the opening of the
valve is increased by drawing back the nozzle, and the quantity of steam discharged
through the valve into the chamber c increased, and the quantity of water drawn
and forced through the injector, graduated at will.
The valve must be closed when the injector is started, and until its operation is
fully established: and then while it continues closed the operation of the injector is
perfect under all pressures of steam, without further adjustment: and whenever an
increase of the capacity of the injector becomes necessary, for the supply of a
greater quantity of water to the boiler, the valve may be opened sufficiently to
supply the necessary increase of water.
Steam is supplied to the chambers b and g successively by means of a rotating
valve located in the chamber o arranged laterally with relation to the axes of all
the parts above named.
Steam passages m and n are provided, by which the chamber 6 is connected by
passage m with a port under the valve i, and the chamber g connected by passage n
with a port under the valve i opening at a little distance obliquely from the
former port and seperated from it by an oblique bridge under the valve, the
former port being a little in advance of the latter, whereby, as the stem is rotated,
steam is first admitted by the passage m to the chamber 3: and when the jet of
water is established as above described steam is admitted by the latter port through
the passage n to the chamber g and nozzle fas described. The stem of the valve i
is provided with a handle A, and is held in line in chamber o by boxes in the caps
at the ends of the chamber, and is provided with a conical bearing adapted to a
concave seat in the cap next to handle A, and is held and packed in its seat by the
pressure of steam in the box at the opposite end of the stem, or by a spiral-spring
in the last named box at the end of the stem.
The handle A is attached to the stem in such a position that when the handle is
turned to a horizontal position the port connected with the passage m is opened
admitting steam into the chamber band nozzle a, and when the jet of water
appears at the overflow k the handle is revolved until it comes into contact with
stuffing-box B, when steam is admitted by the passage n into the chamber g and
nozzle f. The jet of steam from the nozzle a is thus reinforced powerfully by the
annular jet of steam entering the nozzle faround the point of the nozzle d engaging
the water and forcing it forward with such strong and steady action as to ensure
constant operation of the injector under all variations in the pressure of the steam.
The nozzle h has an opening 8 intersecting the bore of the nozzle h horizontally,
next to the throat of the nozzle, and also an annular opening next to the nozzle f
in the chamber 7, for the purpose of affording ample egress for the steam at the
moment of starting the injector by which the rapid flow of the jet of steain and
water is facilitated without being liable to interruption which would result from a
large egress of steam or water at any one point in the nozzle h.
The throat of the nozzle h beyond the opening s is made a little less in diameter
than the bore of the nozzle h next the opening 8, for the purpose of concentrating
the force of the jet of water passing into the pipe h and preventing the return of
water into it and through the overflow.
The velocity and force given to the moving water after the reinforcement by the
auxiliary jet is so great that it becomes unnecessary to close the overflow: and the
operation of the injector is rendered very convenient and simple.
I am aware that each one of the improvements or devices above described,
considered seperately, may not be new, and may have been used in other forms of
construction and combination: I therefore do not claim the above described devices
broadly.

page_text: Having now particularly described and ascertained the nature of my said
Invention, and in what manner the same is to be performed, I declare that what
I claim is
First. In an injector-nozzle, a, provided with a transverse opening through it
communicating with the bore of the nozzle and steam-chamber b, combined with a
fixed nozzle a, and constructed with a triangular guide and conical valve at the
end of the triangular section adapted to a concave seat in the nozzle a¹, the point
of the nozzle a tapering and extending through the nozzle a¹ into the water-
chamber c, and entering within the throat of the nozzle d, the nozzle a¹ also
extending into the chamber c, but not into the nozzle d, the nozzles a and a¹
combined with the water-chamber c, nozzle d, steam-chamber g, nozzle f, into the
throat e of which the point of the nozzle d enters, chamber 1, tube h, and overflow k,
and nozzles a, d and f and tube h, aligned in a straight line with each other and
enclosed in a case provided with suitable connections for steam and water pipes,
and all arranged, combined, constructed, and operating as set forth.
Second. In an injector, the steam-chamber o, provided with a cap at each end of
the chamber, and within and combined with the said chamber valve i provided
with a handle A upon a stem held in line in boxes in the said caps, and a conical
bearing adapted to a concave seat in the cap at the end of the chamber o, next to
the handle A, the said chamber o also provided with ports under valve i, and
passages m and n, communicating with the steam-chambers 6 and 9, combined
with steam nozzles a, d and f, tube h, and overflow k, all arranged, combined,
constructed, and operating as set forth.