Improvements in Injectors or Apparatus for Feeding Steam Boilers with Water.
Year: 1889

page_text: Date of Application, 31st Jan.. 1889
Complete Specification Left. 22nd Oct., 1889-4ccepted, 23rd Nov., 1889
PROVISIONAL SPECIFICATION.
Improvements in Injectors or Apparatus for Feeding Steam Boilers
with Water.
I, JAMES GRESHAM, of the firm of Gresham & Craven, of Craven Iron Works,
Salford, in the County of Lancaster, Engineers, do hereby declare the nature of the
said invention to be as follows:-
My invention relates to improvements upon the apparatus described in the
Specification of Letters Patent granted to me Numbered 4620-1885 which apparatus
has for its object what is termed a Combination Injector in which the mechanism
constituting an injector and connected cocks and valves and other parts are all
combined together so as to be fixed to the steam boiler (the front of the locomotive
fire box) by one flange or equivalent connection this flange or equivalent having
two openings one for steam, and the other for water, which openings are or may
be connected each with a pipe leading to the points required in the interior of the
boiler.
My present improvements consist in improved construction, combination and
arrangement of the parts forming a
The casing of the
Combination Injector."
injector along with the flange junction for attachment to the boiler is formed in one
piece. Assuming that the Combination Injector is to be secured to the front of the
fire box of a Locomotive boiler, the spindle of the valve for steam from the boiler to
the injector is horizontal and perpendicular to the vertical face of the fire box.
The spindle of the valve is screwed and screws through a tube having a packing
gland formed in it, this tube screwing steam tight into the casing, the wheel or handle
for rotating the spindle being secured at its outer end.
The valve on the inner end of the spindle closes against a seating formed in
the casing.
The stop valve for closing the delivery from the injector to the boiler is constructed
and arranged in a similar manner to the steam valve, a square sided collar being
secured on the end of the spindle for rotating it.
The fluid propelled by the injector passes through a cone valve having a stem in a
hollow guiding plug screwed fluid tight into the end of the casing, the valve closing
against a seating formed in the casing. The casing part for the nozzles is vertical to
the face of the fire box and its interior is arranged to receive the steam nozzle
screwed into the casing the steam from the steam valve going from it along a passage
in the casing.
The interior of the casing is also prepared to receive the combining nozzle which is
screwed into it, and the discharging nozzle is also screwed into the casing and the
latter is prepared to receive the moving part of the combining cone or nozzle, which
when the injector is working moves against the end of the first part of the combining
cone.
These nozzles are formed so as to be readily screwed in and out of the casing by
box or other spindle key.
The delivery end of the casing is closed by a hollow fluid tight screw plug.
The fluid delivered from the discharging nozzle passes along an annular space
between the exterior of the discharging nozzles and the interior of the casing and
then to the delivery valve above mentioned. There is a junction with the casing for
the water pipe which enters the casing through a cone cock, and then goes along a
passage in the casing to the combining cone. The water pipe is on the front side of
the casing, and the overflow pipe is between the boiler and the water pipe, there being
a passage in the casing from the overflow openings and there is a cock in the casing
in this passage which forms a junction with the overflow pipe.
There is a passage between the water and overflow cock and a port in each cock
which ports will come opposite this passage, when the water cock is shut and the

page_text: overflow cock is open so that condensed steam or leakage can escape from the nozzles
into the overflow pipe.
By means of the water cock, steam may be allowed to pass to the tender or water
tank to heat it when required.
With the injector and connected parts arranged as describel, the water pipe is not
liable to be heated by the boiler heat; the condensed steam which would accumulate
in and around the nozzies and heat them when the water cock was shut is allowed to
escape and thus being kept cool the injector starts promptly when required to be set
to work and the arrangement of the back pressure delivery valve as described acts in
like manner to keep the injector cool and facilitates prompt starting.
Dated this Thirtieth day of January 1889
PETER J. LIVSEY,
A cont
OM DIE CIECIFICATION.
Improvements in Injectors or Apparatus for Feeding Steam Boilers
with Water.
I, JAMES GRESHAM, late of the firm of Gresham & Craven, now Director of the
firm of Gresham & Craven Limited, of Craven Iron Works, Salford, in the County
of Lancaster, Engineers, 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 :-
My invention relates to improvements upon the apparatus described in the
specification of Letters Patent granted to me Numbered 4620-1885 which apparatus
has for its object what is termed a Combination Injector, in which the mechanism
constituting an Injector and connected cocks and valves and other parts are all combined
together so as to be fixed to the steam boiler (the front of the Locomotive fire box) by
one flange er equivalent connection this flange or equivalent, having two openings,
one for steam and the other for water, which openings are or may be connected each
with a pipe leading to the points required in the interior of the boiler.
By my present improvements the position of the overflow and water passages are
changed, condensed steam is allowed to drain into the overflow passage when the
injector is not working and the construction and position of the back pressure
delivery valve is altered and by these means the injector is kept cool and free from
hot water, when not working, and the prompt starting of the Injector is thereby
facilitated.
My present improvements consist in improved combination, construction and
arrangement of the parts forming a "Combination Injector" and will be most readily
described and understood by reference to the accompanying drawings.
Fig. 1 is a sectional elevation in a plane parallel with the face of the flange, forming
the junction with the boiler, the section being taken through the longitudinal axis of
the nozzles of the injector.
Fig. 2 is a sectional elevation in a plane at a right angle to that shown by fig. 1,
the section being taken through the axes of the steam, delivery, and back pressure
valves and through the water cock.
Fig. 3 is a horizontal section at the line A-B fig. 1, and fig. 4 is a horizontal
section and plan at C-D fig. 2.
These figures 1, 2, 3 and 4 illustrate one modification of my invention.
Fig. 5 is a sectional elevation in the same plane as that shown by fig. 1, with the
section taken through the longitudinal axis of the back pressure valve and showing
an outside elevation of the nozzles in position.
Fig. 6 is an elevation in section in the same plane as fig. 2 the section being taken
through the longitudinal axis of the nozzles and through the water feed and overflow pipe.
Fig. 7 is a horizontal section at A-B fig. 5, and
Fig. 8 is a longitudinal section at C-D fig. 6.
The figures 5, 6, 7 and 8 illustrate another modification of my invention.

page_text: Referring to figs. 1, 2, 3 and 4, a', is a flange on the casting a, forming the casing
of the injector. By this flange a fluid tight joint is made with the front of the boiler
or with that part to which it is to be attached.
Within the flange there is an inlet and outlet passage. The inlet passage b, is in
communication directly or by a pipe (not shown) with the steam space of the boiler,
and the outlet passage c, is or may be connected with a pipe (not shown) the open
end of which will deliver the fluid at the required part of the boiler.
The steam valve ', is upon the end of a screwed spindle 62, and is double acting,
having a cone on each side, and there is a seating formed for it on both sides.
The spindle 2, of the valve is arranged to screw in a tubular casing 6³, which is
screwed fluid tight into the casing a.
The inner end of the tubular casing 3, has a seating formed upon it to fit the
back cone facing on the double valve ¹.
The tubular casing has also holes 64, in its sides to allow steam to pass from its
interior to a cavity a, in the casting surrounding it which cavity communicates with
the passage a³, leading to the steam nozzle d, of the injector.
The outer part of the tubular casing ³, is formed into a stuffing box 6, and receives
a screwed gland 66, so that the spindle 2, may be kept fluid tight.
On the outer end of the spindle 2, a handle or hand wheel 67, is secured by a screw,
by which the spindle 62, is rotated.
There is an arm, hinged to the tubular casing at 6, which can he placed in
the position shown in dotted line in fig. 2.
In fig. 2 the valve 61, is shown closed upon one seating, so as to prevent steam from
the boiler from passing to the casing a.
When the valve, is screwed against the other seating on the inner end of the
tubular casing 3, steam has access to the casing of the injector but not to the nozzles
of the injector.
The object of the arm 78, when in the position shown in dotted line is to prevent
the spindle from being screwed so far in as to bring the valve close against its
seating and thus shutting the steam from the boiler entirely off from the injector
casing, while giving latitude for regulating the steam within the limit fixed upon by
the said arm.
e, is another tubular casing screwed into the casing, fluid tight and which is
screwed to receive the screwed spindle e², of a valve e', which has a seating in the
casing a.
This valve e', is a stop valve and closes the outlet for fluid from the injector to the boiler.
The back of the stop valve is faced so that when screwed back to its full extent as
when properly at work it will come against the end of the inner tubular casing e,
and form a tight joint to prevent the escape of fluid past the spindle e².
There is a square or other sided nut 3, (suitable for a screw wrench to engage
with) secured upon the outer end of the spindle e², by which it can be screwed in and
out when required.
The casing a, is prepared to receive the steam nozzle d, which is screwed into it,
and also to receive the first part of the combining nozzle, formed as shown, also
secured into the casing and also to receive the tube in which the discharging nozzle g,
is formed which is also screwed into the casing a.
The last named tube is prepared to receive the movable part f', of the combining
nozzle, which has a flange / round it that when the jet is established comes against
the rim, on the end of the first part of the combining cone /.
When the movable part of the nozzle', is in the position shown in fig. 1, there
is a free outlet for overflow which passes into the annular cavity a', in the casing
round the nozzles, this cavity communicating with the passage as in the casing
leading to the overflow pipe h.
The nozzles d, and, are provided with sides to engage with a box screw key,
or spindle key, in order that the nozzles may be screwed in and out of the casing a.
There is a cap i, screwed fluid tight into the end of the casing a, by removing
which cap access is given to the nozzles.

page_text: The fluid delivered by the discharging nozzle g, enters the cavity within the cap 1,
between its inside and the exterior of the nozzle y, which cavity communicates by a
passage as, in the casing a, with an outlet, that is closed when the jet ceases by a
back pressure valve j, (see figs. 1, 2 and 4).
This valve j, is formed upon one end of a stem, that slides and is guided in a
hollow plug, that screws fluid tight into the end of the casing a, and gives access
to the valve j.
The stem, of the valve j, has a small hole in its longitudinal axis communicating
with a cross hole near the back of the valve seen best in figs. 4 and 2, so that fluid
in the hollow of the screw plug j2, in the cavity above the end of the stem j', may
escape when the valve opens and enter when it shuts, and thus permit of free movement.
The overflow passage a, and pipe h, is nearest the boiler and between it and
the water supply passage a', and pipe k, which is coupled up to the casting a.
The water passage a', leads to the annular cavity as, round the steam nozzle d,
(see fig. 1).
In the water passage a', a cone cock 1, is arranged for turning on and off the
water supply and when the water supply is shut off as when the cone plug of the
cock is in the position shown in figs. 2 and 3, a small hole ', in the cone of the cock
communicates with the passage a', leading to the cavity as, round the steam nozzle,
so that fluid can enter the hollow of the plug 7, but cannot pass down the water pipe
but through another small hole in the hollow cone of the plug which in that position
of the cone of the plug comes opposite a hole or passage 12, leading to the overflow
passage a³, as shown best in fig. 3.
By this means all hot condensed steam from leakage of valves is allowed to drain
away as it is formed, and the pipes and injector are thus kept free from hot water
when not at work and the injector will start to work promptly when required.
From the cavity a³, of the steam valve b', there is a passage a*, in the casting a,
that leads to an outlet, to which a pipe m, may be coupled to supply steam to the
vacuum brake ejector, or for other purposes, the steam valve being arranged as
hereinbefore described, so that though steam is shut off from the injector nozzles,
it may remain on to the ejector, but when required it may be shut off from both.
The modification illustrated by figs. 5, 6, 7 and 8 is similar to that above described
and shown by figs. 1, 2, 3 and 4 with the exceptions hereinafter named.
from
The delivery valve e', in the second modification is the same in arrangement and its
position in the casting a, as in the first modification, shown by figs. 1, 2, 3 and 4,
but the steam valve, is not in the same position, but there is a passage a",
the hole, in the flange a', to bring the steam to two valves, shown best by
figs. 6 and 8.
The steam valve ', in this case is only single acting-it is on the inner end of a
screwed spindle 2, screwing through a tubular part 63, screwed fluid tight into the
casing a, the spindle 62, being packed by a stuffing box as shown, and it is rotated
by a handle or hand wheel 67, secured upon squares upon the end of the spindle b².
The other valve n, on a screwed spindle n', screwing into the casing a, being
provided with a stuffing box as shown, and nut or head n², upon the end of the
spindle to rotate it.
This valve is or may be used for turning on and off a supply of steam for the
steam sanding arrangements of Locomotives, or for other purposes.
There is a flanged junction a, for the pipe which is to take the steam from the
valve n.
The overflow passage a, as well as the water supply passage a', in this modification
is provided with a cone cock p, so that when the cock p, is shut and the cock
is open steam may be supplied when required through that passage a', and water
feed pipe k, to the water tank for heating purposes.
By referring to figs. 6 and 7 it will be seen that when the water cock 1, is shut
there is a small port l', for condensed steam to pass through a passage 12, to the
cock p, and into the overflow passage a', when that cock p, is open and the water
cock, shuts off the supply of water.

page_text: Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is.
1. The construction, combination and arrangement of injector nozzles with steam
valve, back pressure valve and water, and overflow passage, arranged as described
and with a passage for condensed steam through the water supply cock to the
overflow substantially as and for the purpose hereinbefore described and illustrated by
figs. 1, 2, 3, and 4 and figs. 5, 6, 7, and 8 of the drawings.
2. In Injectors where all the parts, and the necessary cocks and valves are formed
in the same casing (a) combining the parts so that the overflow passage and pipe
will come between the boiler and the water pipe, substantially as and for the purpose
described and illustrated by the drawings.
3. The combination of a cock or its equivalent, or two cocks with injector apparatus
to allow condensed steam to pass from the water passage above the water cock, when
the water is turned off from the injector to the overflow passage, and for warming
water in the tank when the cock p, is shut and the cock is open substantially as and
for the purpose hereinbefore described and illustrated by the drawings.
Dated this Twenty-first day of October 1889.
PETER J. LIVSEY,
Agent.