Improvements in Injectors for Lifting and Forcing Water into Steam Boilers, and Checking and Retaining the Steam and Water therein, by combining therewith Suitable Automatic Check and Stop Valves.
Year: 1893

page_text: Date of Application, 21st July, 1893
Complete Specification Left, 21st Apr., 1894-Accepted, 14th July, 1894
PROVISIONAL SPECIFICATION.
Improvements in Injectors for Lifting and Forcing Water into
Steam Boilers, and Checking and Retaining the Steam and
Water therein, by combining therewith Suitable Automatic
Check and Stop Valves.
I, JOSEPH HALL, Engineer, of 63 Royal Exchange, Manchester in the County
of Lancaster, aud of the Palace Works, Stockport in the County of Chester do
hereby declare the nature of this invention to be as follows:-
My invention relates to improvements in injectors for lifting & forcing water into
steam boilers, & consists of a combination of improvements by which the efficiency
of the instrument is increased, & access to the internal parts for the purpose of
cleaning & repairs much facilitated. My improvements consist in the following :-
Firstly. I employ in my improved injector an automatic double lifting steam
spindle having a central steam passage & in combination therewith an annular
steam space formed between the said spindle & the steam nozzle, the central &
annular steam jets operating together for ejecting the air & creating a vacuum,
thereby raising water into the injector.
Secondly, I employ in my improved injector, in connection with the steam spindle
& nozzle above mentioned, receiving & delivery cones, the whole forming one
complete tube, so constructed with right angle steam joints that the whole internal
tube may be withdrawn for cleansing purposes without disturbing the pipe joints
or connections of the injector.
Thirdly, I employ in my improved injector an automatic check & stop valve
combined. The check valve is constructed so as to be closed automatically by the
back pressure from the boiler, the stem of the valve forming a piston working
within a chamber into which the pressure water from the boiler is admitted by a
side passage. The stop valve surrounds the check valve, & when screwed down
completely encloses it, so that it may be entirely removed for the purpose of
cleaning, &c., the stop valve meanwhile entirely shutting off the pressure of the
boiler from the injector. The stop valve forms with its seat a sliding joint, & also
with the body of injector.
Fourthly, I employ in my improved injector a steam stop valve, with sliding
joint, to control the issue of steam to the steam passage in connection with the
steam chamber supplying the steam spindle & nozzle before mentioned. This stop
valve is regulated by a screw, by means of which steam can be entirely shut off
from the injector when it is desired to remove the internal tube.
Dated this 19th day of July 1893.

page_text: COMPLETE SPECIFICATION.
Improvements in Injectors for Lifting and Forcing Water into
Steam Boilers, and Checking and Retaining the Steam and
Water therein, by combining therewith Suitable Automatic
Check and Stop Valves.
I, JOSEPH HALL, Engineer, of 63 Royal Exchange, Manchester, in the County
of Lancaster, and of the Palace Works, Stockport, in the County of Chester, 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 in injectors for lifting and forcing water
into steam boilers, and consists of a combination of improvements by which the
efficiency of the instrument is increased, and access to the internal parts for the
purpose of cleaning and repairs much facilitated. My improvements consist in
the following ;-
Firstly. I employ in my improved injector, an automatic, double lifting steam
spindle, A, (Fig. 1, Sheet 1) having a central steam passage, B, and in combination
therewith an annular stean space, C, formed between the said spindle and the
steam nozzle, D, the central and annular steam jets operating together for ejecting
the air and creating a vacuum, thereby raising water into the injector.
Secondly. I employ in my improved injector, in connection with the steam
spindle, A, and steam nozzle, D, above mentioned, receiving and delivery cones, El
& E2, the whole forming one complete tube R. R so constructed with right angle
steam joint, F, that the whole internal tube, R. R. may be withdrawn for cleansing
purposes without disturbing the pipe joints or connections of the injector.
Thirdly. I employ in my improved injector, an automatic check valve, H, and
stop valve, I, combined. The check valve, H, is constructed so as to be closed
automatically by the back pressure from the boiler, the stem of the valve, H,
forming a piston working within a chamber, J, into which the pressure water from
the boiler is admitted by side passages, K. The stop valve, 1, surrounds the check
valve, H, and when screwed down completely encloses it, so that by removing the
part, J, it may be entirely removed for the purpose of cleaning, grinding or
renewal. In the meantime the stop valve, 1, entirely shuts off the pressure of the
boiler from the injector, the said pressure being confined to the passage, G, of the
injector by the steam tight sliding joints, L' and L2, when the stop valve is screwed
down as shown by the dotted lines.
Fourthly. I employ in my improved injector, a steam stop valve, M, shown in
Fig. 2, Sheet No. 1, to control or regulate the issue of steam to the steam passage, P,
in connection with the steam chamber, N, which supplies the steam spindle and
nozzle before mentioned. This stop valve has steam tight sliding joints, M' and M²,
which, when the valve is screwed down as shown by the dotted lines, confine the
steam to the passage, O, of the injector. By this means the steam supply is shut
off from the steam chamber, N, when it is desired to remove the internal tube for
cleaning or repair.
Fifthly. I employ in my improved injector, an overflow tube, X, shown in Fig. 3,
Sheet No. 2, for the discharge of overflow when starting the injector, the said tube
being made to stand up inside the casing of the injector above the level of the
receiving and delivery cones, E and E", by which arrangement "dribbling" from
the overflow during the working of the injector is prevented. This overflow
tube, X, is of such a length as to allow the union, V, on the water cock, S, shown
in Fig. 4, Sheet No. 2, to be dropped sufficiently to admit of the suction pipe being
disconnected, when required.

page_text: Referring to the drawings,-
Fig. 1, Sheet No. 1, is a longitudinal section of the injector, showing the take-
out tube, RR, made up of the spindle, A, (adjustable by screw and hand wheel,
and suitably provided with gland and stuffing box) steam nozzle, D, and receiving
and delivery cones, E and E³, e being the overflow orifice, the whole being
screwed into the body of the injector at f, and making joints at F, fi and ƒ³.
The body of the injector is rectangular in cross section, as will be seen on
reference to Fig. 3, and is terminated by a flange, T, for the purpose of attaching
the injector to the front of boiler or firebox. On the top of the injector and
adjoining the flange a boss is provided into which the delivery check and stop valve
before described, and the steam stop valve before described, are screwed, side by
side. In Fig. 1, Sheet No. 1, the longitudinal section is made to include a section
of the former valve, for the sake of clearness, although as will be seen from the
cross section the check valve lies to the left of the centre line of the injector.
Fig. 2, Sheet No. 1, is a section through the steam stop valve, which lies to the
right of the centre line of the injector, and the continuation of the steam passage, P,
from the point where the section is broken off, will be found shown by dotted lines
in Fig. 1.
Fig. 3, Sheet No. 2, the above mentioned cross section, is taken, as regards the
upper portion, at the line marked Y in Fig. 1 in order to show the position of the
steam passage, P. An opening into this passage from the outside of the injector
body, is closed by the plug, U, which opening is provided for attaching a pipe
when steam is required for purposes foreign to the injector.
As regards the lower portion of the cross section, it is taken at the line marked Z
in Fig. 1, and shows the overflow tube, X, standing up well above the level of the
delivery cone, E². In Fig. 1 the position of this tube, X, only, is indicated.
Fig, 4, Sheet No. 2, shows a water cock, S, required in connection with the
water supply to the injector. It is screwed into a boss on the bottom of the injector,
shown at W, Fig. 1.
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 ;-
1st. The combination and arrangement of an injector for lifting and forcing
water into a steam boiler substantially as hereinbefore mentioned and described,
and illustrated by Figs. 1, 2, 3 and 4 of the drawings.
2nd. The complete take-out tube for cleaning, RR, consisting of delivery and
receiving cones, E and E², steam nozzle, D, and spindle, A, with gland and stuffing
box complete, and provided with steam tight joint, F, substantially as hereinbefore
described and shown by the drawings.
3rd. The automatic check valve, H, combined with stop valve, I, having sliding
joints, L' and L, for retaining the boiler pressure, so arranged that the check valve
can be altogether withdrawn from the injector while under steam, substantially as
hereinbefore described and shown by the drawings.
4th. The steam stop valve, M, with sliding joints, M¹ and M³, for retaining or
cutting off the steam supply from the steam passage, P, previous to removing the
internal tube, substantially as herein before described and shown by the drawings.
5th. The overflow tube, X, with upstanding portion substantially as hereinbefore
described and shown by the drawings.
Dated this Nineteenth day of April 1804
JOSEPH HALL.