Improvements in Injectors.
Year: 1897

page_text: Improvements in Injectors.
I, ROBERT GRUNDY BROOKE, of Upton Grange, Macclesfield, in the County of
Chester, Engineer, do hereby declare the nature of this invention to be as
follows:
This invention has reference to improvements in supplementary injectors for
use in connection with exhaust steam injectors. In such supplementary injectors
it is usual to provide an overflow or relief opening or both overflow and relief
openings, controlled by a valve to facilitate the starting of the injector, the arrange-
ment being such that the valve for admitting live steam to the supplementary
injector is kept closed and the relief valve is kept open until a jet has been
established through the supplementary injector by the exhaust injector where-
upon the overflow or relief valve is closed and the live steam valve is opened to
supply live or high pressure steam to the jet and impart thereto the required
increased velocity and consequent increased penetrating power.
Now this invention has reference to an improved construction and arrangement
of the steam and overflow or relief valves and means for operating the same
by hand.
According thereto the steam and overflow or relief valves are carried by parallel
or approximately parallel spindles that extend throuth stuffing boxes or guides
and are jointed at their outer ends to the opposite arms of a hand lever pivoted
upon a rod or support on the injector casing, the steam valve being arranged to
move towards and from the inlet end of the live steam nozzle and the overflow or
relief valve being arranged to move toward and from the water exit opening in
the valve casing, the arrangement being such that when the steam valve is moved
into its closed position the overflow or relief valve is moved into its open position
and vice versa.
In one arrangement, the supplementary injector is constructed with a steam
nozzle the Inlet end of which is flat or coned and controlled by a flat disc or cone
valve carried by the adjacent end of the steam valve spindle. The combining
nozzle is constructed with one or more lateral relief or overflow openings of
ordinary kind and there is an ordinary overflow opening between the combining
and delivery nozzles, the said openings communicating with an overflow chamber
the exit opening from which is controlled by a flat faced or coned overflow valve
carried by the inner end of a spindle the outer end of which is connected to one
end of the hand lever by a link.
In another arrangement, the valves and valve operating mechanism are similar
to those hereinbefore described, but the relief valve is arranged to control a relief
passage in communication with and leading from the outlet end of the delivery

page_text: nozzle. In this case the combining and delivery nozzles are in one piece anl
have a continuous passage therethrough without lateral relief or overflow passages.
Dated this 22nd day of January 1897.
I, ROBERT GRUNDY BROOKE, of Upton Grange, Macclesfield, in the County of
Chester, 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 improvements in supplementary injectors for
use in connection with exhaust steam injectors. In such supplementary injectors
it is usual to provide an overflow or relief opening or both overflow and relief
openings, controlled by a valve to facilitate the starting of the injector, the arrange-
ment being such that the valve for admitting live steam to the supplementary
injector is kept closed and the relief valve is kept open until a jet has been
established through the supplementary injector by the exhaust injector where-
upon the overflow or relief valve is closed and the live steam valve is onened to
supply live or high pressure steam to the jet and impart thereto the required
increased velocity and consequent increased penetrating power.
Now this invention has reference to an improved construction and arrangement
of the steam and overflow or relief valves and means for operating the same
by hand.
According thereto the steam and overflow or relief valves are carried by parallei
or approximately parallel spindles that extend through stuffing boxes or guides
and are iointed at their outer ends to the opposite arms of a hand lever pivoted
upon a rod or support on the injector casing, the steam valve being arranged to
move towards and from the inlet end of the live steam nozzle and the overflow or
relief valve being arranged to move towards and from the water exit opening in
the valve casing, the arrangement being such that when the steam valve is moved
into its closed position the overflow or relief valve is moved into its open position
and vice versa.
Fig. 1 of the accompanying drawings is a vertical section showing one con-
struction of supplementary injector according to this invention, and Fig. 2 is a
section thereof on the linea of Fig. 1.
In this arrangement A is the live steam nozzle; B the combining nozzle; C the
delivery nozzle and I the inlet for water coming from the exhaust injector with
which the supplementary injector is used. The inlet end A of the steam nozzle A
and constituting a valve seat is shown as made flat and controlled by a flat disc
steam valve E though a conical seat and valve may be used if desired. The steam
valve is carried by the adjacent end of a spindle F which extends through a
stuffing box G and is jointed at its outer end to one arm of a hand lever H pivoted
to a rod I fixed to a lug or projection J on the injector casing K. The combining
nozzle B is shown constructed with a lateral relief or overflow opening L of
ordinary kind, or there may be more than one such opening, and M is an ordinary
overflow opening left between the combining and delivery nozzles B and C respec-
tively. These openings communicate with an overflow chamber N formed by and

page_text: between the injector casing and parts of the combining and delivery cone and
extending into a valve case N¹ the exit opening O from which, constituting the
overflow or relief opening, is controlled by a valve P, which, may be a conc valve
as shown, or à flat faced valve. The overflow or relief valve P is carried by the
inner end of a spindle Q that is arranged parallel to the steam valve spindle F,
extends through a stuffing box R and a guide S, and has its outer end connected
by a link T to the opposite arm of the hand lever H to that to which the steam
valve spindle F is connected.
Fig. 3 is a similar view to Fig. 1 showing a modification in which the valves
and valve operating mechanism are like those shown in Fig. 1, but the overflow or
relief valve P is arranged to control a relief passage N in communication with and
leading from the outlet end of the delivery nozzle C. In this case the combining
and delivery nozzles B and C respectively are in one piece and have a continuous
passage therethrough without lateral relief or overflow passages such as L and M
(Fig. 1).
In each case by operating the hand lever H in one direction, the steam valve E
will be closed and the overflow or relief valve P simultaneously opened so as to
permit the injector to start, and upon moving the hand lever in the reverse
direction after a jet has been established through the injector, the overflow or
relief valve P will be closed and the steam valve simultaneously opened so as to
admit live steam to the steam nozzle A.
Having now particularly described and ascertained the nature of the said in-
vention and in what manner the same is to be performed I declare that what I
claim is
1. A supplementary injector provided with steam and overflow or relief valves
carried by parallel or approximately parallel spindles that extend through stuffing
boxes or guides and are connected at their outer ends to the opposite arms of a
hand lever carried by the injector casing, the steam valve being arranged to move
towards and from the inlet end of the live steam nozzle and the overflow or relief
valve being arranged to move towards and from the water exit opening in the
valve case, the arrangement being such that when the steam valve is moved into
its closed position, the overflow or relief valve will be moved into its open position
and vice versa, substantially as herein described.
2. My improved supplementary injectors constructed, arranged and operating
as hereinbefore described with reference respectively to and shown in Figs. 1
and 2, and in Fig. 3 of the drawings annexed."
Dated this 22nd day of October 1897
W. LLOYD WISE,
46 Lincoln's Inn Fields, London, W.C., Chartered Patent Agent.