Improvements in Injectors.
Year: 1892

page_text: Date of Application, 12th Apr., 1892
Complete Specification Left, 11th Feb., 1893-Accepted, 25th Mar., 1893
PROVISIONAL SPECIFICATION.
Improvements in Injectors.
I, ROBERT GRUNDY BROOKE, of 44, Queen's Gate, Blackpool, in the County
of Lancaster, Engineer, do hereby declare the nature of this invention to be as
follows:-
This invention has reference to injectors of the type known as combination
injectors, in which several boiler fittings usually separate and distinct from the
injector, are combined in the one apparatus.
Injectors of this class have usually been fixed on the back plate of locomotive
fire boxes, but it is found that it is not always practicable or convenient to fix
injectors on this part of the boiler. An object of my present invention is to
construct an injector of the type referred to in such a manner that it can be
conveniently fixed to any part of the boiler, and so that its various parts can be
more conveniently taken apart than has hitherto been usual.
For this purpose I construct an injector of the kind referred to with a self-
contained non-return or check valve having its case so formed and arranged in
relation to a specially formed delivery passage that the seat of the said valve, as
well as the valve itself, can be made removable without breaking any of the
injector joints or connections; that the injector can be fixed with its body near to
the boiler; and that the combining nozzle can, if desired be readily withdrawn
from the delivery end of the injector casing in a manner well understood. In one
arrangement the delivery passage is arranged transversely to the delivery nozzle
and so that water from the delivery nozzle first passes outward and away from the
final delivery outlet or passage by which it enters the boiler, until it passes through
the valve case whence it passes back in a direction towards the final delivery
outlet and into the boiler. The injector may be provided with a stop valve
adapted to close the delivery passage and so arranged in relation to the non-return
or check valve that when it is in its closed position, the said non-return or check
valve, together with its seat, can be removed while the boiler is under steam.
The valve case containing the check valve, and it may be also the stop valve, can
be made separate from the main body of the injector casing to which it is secured
by any convenient means, or it may be made in one with such casing.
An injector constructed with a check valve having a removable valve seat as
described, may have its steam and delivery flanges so arranged that each of them
can be fastened direct to the boiler in a manner well understood so as to avoid
external steam and delivery pipes. Or the injector casing may be constructed
with a single flange formed with steam and delivery passages arranged near
together.
Such an injector may be provided with a self-contained steam valve, the axis
of which is preferably arranged co-axially with that of the injector. This valve
may be worked by a screw or by a direct pull, and be formed in one with or carried
by the regulating spindle of the injector if there be one.
DL 1
f A1002

page_text: COMPLETE SPECIFICATION.
Improvements in Injectors.
I, ROBERT GRUNDY BROOKE, of 44 Queen's Gate, Blackpool, 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 :-
This invention has reference to injectors of the type known as combination
injectors, in which several boiler fittings usually separate and distinct from the
injector, are combined in the one apparatus.
Injectors of this class have frequently been fixed on the back plate of locomotive
fire boxes, but it is found that it is not always practicable or convenient to fix
injectors on this part of the boiler. An object of my present invention is to
construct an injector of the type referred to in such a manner that it can be
conveniently fixed to any part of the boiler, and so that its various parts can be
more conveniently taken apart than has hitherto been usual.
For this purpose I construct an injector of the kind referred to with a self
contained non-return or check valve having its case so formed and arranged in
relation to a specially formed delivery passage that the seat of the said valve as
well as the valve itself, can be made removable without breaking any of the
injector joints or connections; that the injector can be fixed with its body near to
the boiler shell; and that the combining and delivery nozzles can if desired be
readily withdrawn from the delivery end of the injector casing as in ordinary
injectors.
In the accompanying drawings,
Fig. 1 is a horizontal section on the line A B Fig. 2; and
Fig. 2 is a vertical cross section on the line C D Fig. 1, of an injector of the
type referred to, constructed according to this invention.
The remaining figures are hereinafter referred to.
1 is the injector casing formed with flanges 2, 2* by means of which it can be
fixed to a boiler shell 3 with its steam inlet 4 and delivery outlet 5 directly opposite
8 is the
steam and delivery pipes 6 and 7 respectively arranged within the boiler.
self-contained non-return or check valve (hereinafter called the non-return valve)
arranged within a case 9 and serving to check the return flow of water through the
specially constructed delivery passage 10. 11 is the valve seat. The valve case 9
is arranged at the side of the injector casing away from the flanges 2, 2 so that the
body of the injector can lie closer up to the boiler than otherwise, and the delivery
passage 10 is arranged transversely to the delivery nozzle 12 so that the water from
the delivery nozzle will first pass outwardly and away from the final delivery
outlet 5 until it passes through the valve case 9, whence it will pass back in a
direction towards the final delivery outlet and thence into the boiler, as indicated
by arrows. By this construction it will be seen that the valve scat 11 for the non-
return valve 8 can be formed on a tubular part 11ª adapted to be screwed into the
bottom of the valve case so that the valve seat and the non-return valve can be
readily removed for refacing or other purpose and then be replaced without
breaking any of the injector joints or connections. Furthermore the construction
of the remainder of the injector is not interfered with or rendered more
complicated.
The injector may, as shown, be provided with a stop valve 13 adapted when
moved onto its seat 13s to close the delivery passage 10 at a point between the non-
return valve 8 and the boiler so that the said non-return valve together with its
The valve case 9
seat, can then be removed while the boiler is under steam.
containing the non-return valve 8, and it may be also the stop valve, instead of

page_text: being made in one with the main body of the injector casing as shown may be
In
made separate therefrom and be secured thereto by any convenient means.
either arrangement the valve case may be arranged with its axis at any desired
angle to the axis of the delivery nozzle or to the face of the delivery flange. Thus
the valve case instead of being arranged at right angles to the axis of the body of
the injector as shown in Figs. 1 and 2, might be arranged parallel therewith as
indicated in side elevation in Fig. 3; and it may be arranged at an angle, other
than a right angle, to the face of the delivery flange 2 as indicated in end
elevation in Fig. 4.
The delivery nozzle 12 together with the part 12× of the combining nozzle, is
screwed into the injector casing at 1 which is formed at the adjacent end with an
opening normally closed by a screw cover 14 by removing which the delivery
nozzle and also the combining nozzle or as in the example shown, a part thereof,
can, after shutting off the supply of steam to the steam nozzle 15, be readily with-
drawn from the injector casing without disturbing any other portions of the
injector as well understood.
The injector shown in the drawings is constructed with two flanges adapted to
be bolted direct to the boiler shell, or to a seating thereon, but obviously it might
be constructed to be attached to the boiler shell in any other suitable or equivalent
manner as well understood.
The injector described may be provided as shown, with a steam valve 16, having
its axis arranged coaxially with that of the injector. This valve is formed in one
with or carried by the regulating spindle 17 which carries the screw 17" for
regulating the position of the steam nozzle 15, and the adjacent end of which
nozzle is formed with a seat at 15° for the steam valve described in the Specification
of former Letters Patent granted to me dated May 26 1888 No. 7742.
The injector described can be fixed with the body thereof horizontal, vertical, or
inclined and may be fixed on any type of boiler other than a locomotive boiler.
When so fixed that the non-return valve 8 does not work vertically, or so that it
will not readily close by gravity, it will be advantageous to provide it with a
suitably arranged spring as indicated in dotted lines at 8", Fig. 2 to assist it to
close when necessary.
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. An injector of the type herein referred to, constructed with a non-return or
check valve arranged to control the flow of water through the delivery passage
and having its case so formed and arranged in relation to the delivery passage and
injector casing that the seat of the said valve as well as the valve itself can be
removed without breaking any of the injector joints or connections substantially
as herein described for the purpose specified.
2. An injector of the kind referred to in the preceding claim, constructed with a
delivery passage extending transversely around the delivery nozzle so that the
water in issuing from the said nozzle will at one part of its passage to the delivery
outlet of the injector pass around that side of the chamber containing the delivery
nozzle that is furthest from the delivery outlet and through the non-return valve
chamber forming a part of such passage at that side of the injector, substantially
as herein described.
3. The combination with an injector constructed with a non-return valve and
removable seat as referred to in Claim 1 of a stop valve adapted to close the
delivery passage at a point between the said non-return or check valve and the
delivery outlet substantially as berein described.
4. An injector of the type herein referred to, constructed with a removable non-
return or check valve and valve seat, a stop valve, and combining and delivery
nozzles adapted to be withdrawn through the delivery end of the injector casing
substantially as herein described.

page_text: 5. My improved injector constructed and arranged substantially as hereinbefore
described with reference to and shown in the drawings annexed.
Dated this 11th day of January 1893.
W. Lloyd Wise,
R. G. BROOKE.
46, Lincoln's Inn Fields, London, W.C., Agent for the Applicant.