Improvements in or in connection with Injectors for Supplying Feed Water to Steam Generators.
Year: 1895

page_text: Date of Application, 20th May, 1895-Accepted, 24th Aug., 1895
COMPLETE SPECIFICATION.
Improvements in or in connection with Injectors for Supplying
Feed Water to Steam Generators.
We JOSEPH BAKER of Glenbourne, Dore, near Sheffield in the County of
Derby, Engineer and ARTHUR GREEN of 5, Doncaster Street, Sheffield in the
County of York, 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 relates to improvements in or in connection with injectors used
for supplying water to steam generators and the main object is to provide means
for automatically regulating and controlling the supply of water.
Our invention consists essentially in the combination with the ordinary known
parts of an injector, namely:-the injector cones and the casing surrounding
them of a cylinder or chamber containing a valve with levers and floats in
connection with it, said chamber having connections with the steam and water
sections of the steam generator; of a chamber or passage containing rising and
falling valves-one to control the water supply passage and the other to control
the steam passage to the injector cones and also to act at certain times to open
the water supply valve;-and of supply valves or cocks to regulate the flow of the
liquids or fluids.
In order that our invention may be thoroughly understood we have appended
hereunto an explanatory sheet of drawings in which our invention is clearly shown
in sectional elevation.
In carrying out our invention we connect the tube or casing A containing the
injector cones to the boiler a in the usual way and provide inside the boiler a bent
pipe a¹ which passes partly through the steam space and below the water level.
We also connect to the boiler two pipes or connections B and C the former
communicating with the steam space of the boiler and the latter with the water
space. Each of these pipes is fitted with a suitable cock or valve for regulating
the passage of the steam or water. The outer ends of the pipes B and C
communicate with a cylinder or chamber D provided at the top side with a
passage d-controlled by a valve 4'. The latter is pivoted to, formed integral with
or otherwise suitably connected to a lever D' pivoted at b. Between the valve
and the fulcrum b is suspended on the lever a weight or float 6' whilst the end of
the lever is coupled to another lever E, carrying a float or weight e, by means of
a link el. The weights 6' and e are adjustable. The valve d' is provided with a
suitable seating or valve proper which controls the passage of steam from the
boiler to a cylindrical passage or chamber F which is formed at right angles or so
with the casing A of the injector cones. The chamber F communicates at its top
end with the source of water supply by means of a pipe f and also with the injector
casing A by means of the opening A¹. The latter opening is controlled by a
rising and falling valve G of the piston or ball type which at one time closes the
steam passage A¹ and at another time opens it to allow steam to pass to the
injector cones and at the same time, or almost immediately after, rises and pushes
open a valve H of the spring controlled type which controls the water passage, to
allow water to pass down the branch to the injector cones.
The injector
casing A bas connected to it a suitable back-pressure or clack valve J and is
provided with an opening K to a vacuum chamber and an outlet K' for overflow
of water. We may add that the injector portion of the apparatus may be

page_text: constructed in any of the known ways which will admit of efficient operation in
connection with our improvements.
The operation of the parts described is us follows:-Assuming the valves on
When the
pipes B and C to be opened and the valves d', G and H to be closed.
water in the boiler and consequently in the chamber or cylinder D falls below its
normal working level the floats b' and e fall also. The valve d being thus drawn
away from its seat opens the steam passage d and allows steam from the boiler to
rush up said passage.
In doing so the piston or ball valve G is forced upwards
thereby opening the passage A and allowing steam to pass to the injector. The
ball valve still rising is forced against the stem of the valve H controlling the
The latter is
water supply and forces it open against the pressure of the water.
then free to pass down the water passage h to the injector cones and be conducted
into the boiler by the ordinary action of the injector. The flow continues until
the water in the boiler reaches its normal working level again when the floats in
the chamber D rise and cause the closure of the passage d by the valve d'. The
ball valve G then descends and again closes the passage to the injector whilst
simultaneously the water supply valve is closed by the pressure of water above it,
the downward action of the valve being assisted by the spring surrounding the
stem of the valve. The action of the apparatus is thus automatic and the cycle of
events as described above occurs each time the water level in the boiler falls
below the normal.
Having thus particularly described and ascertained the nature of our invention
and in what manner the same is to be performed we wish it to be understood
that we are well aware that injectors have been hitherto used and to such we luy
no claim but what we do claim is
1. The combination with an injector of a chamber such as D having steam and
water connections to boiler and provided internally with levers and flonts for
operating a valve such as d¹ controlling a steam passage d, casing or passage F
containing a rising and falling valve such as G, water passage controlling valve H
and water passage h all substantially as described and operating in the manner set
forth.
2. The combined apparatus for supplying feed water to steam generators con-
structed and arranged substantially as described and shown in the accompanying
drawings.
Deted this 16th day of May 18 m
KK
EMMOTT & CO., LIMITED,
Per C. S. EDWARDS, General Manager,
Agents for the Applicants.