AN IMPROVED APPLIANCE FOR SUPPLYING BOILER INJECTORS WITH FEED WATER
Year: 1885

page_text: I SAMUEL RICHARD HAWKE of Ventonleague Hayle in the County of Cornwall
Engineer do hereby declare the nature of my invention for AN IMPROVED
APPLIANCE FOR SUPPLYING BOILER INJECTORS WITH FEED WATER to be as
follows:-
'
My invention consists in an appliance for increasing the lifting or suction power
of Boiler Injectors, Feed Pumps and like appliances; but principally for assisting
Injectors.
The lifting power of ordinary Injectors varies from 2 to 12 ft and are fixed in
direct communication with the water to be lifted in the well or tank below.
My Invention consists in an appliance fixed between the Injector or feed pump
and the reservoir containg the water required to be lifted, consisting 1st in an air
tight chamber of any convenient size or form, and varying from a capacity of
about 1 cubic foot to larger, for large Injectors. 2nd a small tank fixed on the top
of the air tight chamber and connecting with by means of a cock.
In the accompanying Drawings, the appliance (which I will designate an
Evector) is shown as fixed to an Injector.
The chamber B communicating with Injector by the pipe K and flanges (a. a)
also communicating with the water supply by the pipe H and stop cock Ď leading
from the well or reservoir W. Before setting the Injector to work, the chamber B
and the small tank should be full of water, the cock C being open and the cock D
closed, by this means chamber B and tank A for the time being form one cistern,
and by reason of its being above the Injector causes the water to flow into tho
Injector which will start easier than with the water below it, on its being ascertained
that the Injector is well at work, the cock D is opened thus puting B in communi-
cation with the water supply at W at the same time closing the cock C. the
Injector then by drawing the water from the chamber B produces a partial vacuum
in it by which means water is drawn up into it from the reservoir W, thus
continual action is kept up, & water may be drawn from depths of more than
20 ft. On again stopping the Injector the tap D is closed and tap C opened, by
this means the pipe H is kept full of water, and any air which may have
acumulated in the chamber B is driven out through the cock C by the water
contained in A flowing in, this leaves the Evector ready for setting to work again
as required.

page_text: The object of the tank A is to supply water to B for a few seconds only, while
starting the Injector, requiring but a small quantity of water. Which may be
filled as required by hand, or by the pipe and stop cock F and E, connected to the
overflow nozzle of the Injector by the flanges (b b), this is acomplished by closing
the tap E and opening the water valve of the Injector (when working) near to its
full extent or slightly closeing the steam valve, causing an overflow of water, which
is forced up the pipe F into A.
By the use of the Evector, insures the easy starting of the Injector by the water
flowing down, to it, & by the action of its vacuum chamber B the lifting power is
greatly increased, and will also permit of working the Injector with reduced steam
passage consequently slower feeding if required to the boiler, an advantage where
the water is first forced through an heater.
i

page_text: I SAMUEL RICHARD HAWKE of Ventonleague Hayle in the County of Cornwall
Engineor do hereby declare the nature of my invention for AN IMPROVED
APPLIANCE FOR SUPPLYING BOILER INJECTORS WITH FEED WATER and in what
manner the same is to be performed, to be particularly described and ascertained
in and by the following statement :—
My invention consists in an appliance for the purpose of increaseing the lifting or
suction power of Boiler Injectors, Ejectors and like appliances wherein a jet of
steam or other fluid is employed in the raising of water or other liquids, also to
insure the prompt and easy starting of the same steam or other fluid jet appliances,
also to insure the prompt and easy starting of feed and other suction pumps; but
principally for assisting Injectors.
The lifting or suction power of Boiler Injectors (chiefly in use) varies from
2 to 12 ft, or thereabout, which are fixed in direct communication with the water
it is required to lift, contained in the well or cistern below.
My invention consists in an appliance fixed between the Injector and the well or
cistern containing the water the Injector is required to lift, consisting 1st in an air
tight chamber of any convenient size or form varying from a capacity of about
one hundred and fifty cubic inches, to a greater capacity for large size Injectors,
(2) a small cistern fixed on the top of the air tight chamber and connecting with
the same by means of a cock or valve: in the accompanying drawings the
appliance is shown as fixed to an Injector.
The air tight chamber B communicates with the water or suction nozzle of the
Injector by the pipe K and flanges F F also communicating with the water supply
at W by the pipe H and stop cock D thus forming an intermediate chamber
between the Injector and the water or other liquid required to be lifted.
Before setting the Injector to work chamber B and small cistern A are filled with
water with cock C opened and cock D closed by this means chamber B and
cistern A for the time being form one cistern, and, by means of its being a few
inches above the Injector, causes the water to flow into it, by which means the
Injector will start more promptly than in the usual manner.
On its being ascertained that the Injector is well at work, cock D is opened by
which means, communication is secured between chamber B and the water
Bupply W at the same time closing cock C.
The Injector continuing to draw water from chamber B tends to create a vacuum
therein, by which means water is drawn into it from W through the pipe H: thus
continued action is kept up, and water may be drawn from a depth of more than
twenty feet, thus increasing lifting power of small Injectors, having a lifting
power of about 6 feet by more than two hundred per cent.
The arrangement Y Y near the bottom of chamber B, consists of two hollow
cones or funnels, one within the other; the water before entering pipe K first flows
through the inner cone which creates an induced current down through the bent
tubes T T, by this means air that has been liberated from the water and rising to

page_text: the top of the chamber, becomes drawn down into pipe K and carried with the
water into the Injector, which would otherwise acumulate in B and vitiate the
vacuum. The air may also be drawn out by subsituting the funnel tube shown in
Fig. 2, and for medium lifts of about 12 feet.
Cock D may be dispensed with by subsituting the bent pipe E Fig. 2.
On its being deemed desireable to stop the Injector, cock D should be closed and
cock C opened, by this means the appliance will be in readiness for restarting,
stop cock D (or a valve for the same purpose) preventing water from cistern A
being emptied into W the pipe H remaining full of water which is desirable for
high lifts but is not esential for medium lifts. The small tap M allows of the
escape of air while filling chamber B with water previous to starting the Injector
which tap may also be used at starting instead of cock C, admitting small quantity
of air, (instead of water from tank A) the air being again driven out by the cones
and tubes YYTT, for low lifts: but for high lifts, it is preferable to use cock C
as described the small tank A may be filled with water as required, from the
overflow nozzle O of the Injector through the pipe shown in dotted lines.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is
(1.) The combination in any water or other liquid lifting appliance: such as
Injectors, Ejectors, Feed and other suction pumps, of the intermediato air tight
chamber or reservoir B for increasing the efficiency of the above named appliances.
(2.) The air exhausting cones and tubes Y, Y, T, T, in combination with
chamber B, substantially as set forth for maintaining the vacuum therein.
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