IMPROVEMENTS IN INJECTORS
Year: 1884

page_text: We WILLIAM HARTCLIFFE, and WILLIAM HENRY MALKIN, both of The Brass
and Copper Works, Saint Simon Street Salford, Lancashire, Machinists, and
THOMAS HENRY WHITE, of Ordsal Terrace Regent Road, Salford, aforesaid
Engineer do hereby declare the nature of said Invention for IMPROVEMENTS IN
INJECTORS to be as follows:-
Our invention relates to improvements in injectors, and consists in fitting a valve
controlled by hand to an extra overflow passage in the injector such valve being
opened when steam is turned on and then closed to start the injector.
The object of our invention is to construct an injector so that in case of any
stoppage or failure in working when steam and water are both turned on the
attendant can by simply opening a valve allow. the steam to pass through the
overflow until the water is lifted, when by closing the valve the injector will be
restarted without shutting off the steam and water, or either of them.
To effect this we form the injector with the usual steam and water inlets, and
water outlet to the boiler or other vessel, and we employ an extra overflow con-
trolled by a hand valve in communication with the ordinary overflow passage.
When steam is admitted to the body of the injector through the ordinary nozzle
we open this valve by hand for a moment to allow free exit of steam, and as soon
as the steam begins to lift the water, the steam and water escape together through
the ordinary overflow passage; we then close the valve by hand, and the steam
forces the water through the outlet into the boiler or other vessel and this will
continue so long as steam remains turned on.
In case of any stoppage or failure in working before steam is shut off, the'
injector can be re-started by simply opening the valve, which will allow the free
exit of steam until it again lifts water, and as soon as this action is re-established
the valve can be closed and water forced into the boiler.
In some cases we propose to connect the steam nozzle by a small passage to the
extra overflow chamber, so that steam passing through this pipe or passage may
assist the action of the injector.
WILLIAM HARTCLIFFE.
WILLIAM HENRY MALKIN.
THOMAS HENRY WHITE.
H. B. Barlow,
Agent for Applicants,
17, St. Ann's Square, Manchester,

page_text: We WILLIAM HARTCLIFFE and WILLIAM HENRY MALKIN, both of The Brass and
Copper Works, Saint Simon Street Salford, Lancashire, Machinists and THOMAS
HENRY WHITE of Ordsal Terrace, Regent Road, Salford aforesaid Engineer do
hereby declare the nature of our invention for "IMPROVEMENTS IN INJECTORS
and in what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement :-
.
Our invention relates to improvements in injectors and consists in fitting a valve
controlled by hand to an extra overflow passage in the injector, such valve being
opened when steam is turned on and then closed to start the injector.
The object of our invention is to construct an injector so that in case of any
stoppage or failure in working when steam and water are both turned on, the
attendant can by simply opening a valve allow the steam to pass through the
overflow until the water is lifted, when by closing the valve the injector will be
re-started-without shutting off the steam and water-or either of them.
To effect this we form the injector with the usual steam and water inlets and.
water outlet to the boiler or other vessel and we employ an extra overflow con-
trolled by a hand valve in communication with the ordinary overflow passage.
When steam is admitted to the body of the injector through the ordinary nozzle
we open this valve by hand for a moment to allow free exit of steam and as soon as
the steam begins to lift the water, the steam and water escape together through the
ordinary overflow passage; we then close the valve by hand and the steam forces
the water through the outlet into the boiler or other vessel and this will continue
so long as steam remains turned on.
In case of any stoppage or failure in working before steam is shut off, the
injector can be re-started by simply opening the valve, which will allow the free
exit of steam until it again lifts water, and as soon as this action is re-established
the valvo can be closed and water forced into the boiler.
In some cases we propose to connect the steam nozzle by a small passage to the
extra overflow chamber, so that steam passing through this pipe or passage may
assist the action of the injector.
And in order that our invention may be fully understood and readily carried
into effect we will describe the accompanying Sheet of Drawings, reference being
had to the figures and letters marked thereon.
Figure. 1. is a longitudinal section of an injector fitted with our improvements,
and Fig. 2 is a similar view of an injector with a small extra steam passage con-
necting the steam nozzle with the extra overflow chamber.
a is the shell of the injector, the ordinary steam nozzle, c the ordinary water
inlet, and d the water outlet to the boiler or other vessel, e is the ordinary overflow
passage and the extra overflow chamber which we employ, the said chamber f
communicating with the ordinary overflow passage e through, and being controlled
by, the hand valve g.
The injector is started by opening the valve g and turning on steam which enters
the body of the injector through the nozzle b, and escapes freely through the extra

page_text: and ordinary overflow passages f and e respectively until all air is expelled, and the.
steam begins to lift the water, and as soon as the steam and water begin to escape
together through the overflow, we close the hand valvo g and the steam forces the
water through the outlet d into the boiler or other vessel, so long as steam remains
turned on.
In the event of any stoppage or failure in working before steam is shut off the
injector can always be re-started by opening the valve g, which will allow the free
exit of steam in the manner already described until the action of the injector is
re-established when the valve g can be again closed to allow water to be forced
through the outlet d.
Fig. 2 illustrates the arrangement which we propose to employ in some cases in
order to assist the action of the injector. h is the small extra steam passage
connecting the nozzle b to the extra overflow chamber f.
The action of the steam which passes through this passage h neutralizes, or tends
to neutralize, the retarding influence exerted by the vacuum in the extra overflow
chamber on the jet of water being forced through the outlet d.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed we declare that what
we claim is
.
1. In an injector for raising and forcing liquids, the use and application of an
extra overflow chamber controlled by a hand valve, substantially in the manner
and for the purposes herein set forth.
2. In an injector for raising and forcing liquids the combination with an extra
overflow chamber, controlled by a hand valve, of a small extra steam passage con-
necting the steam nozzle to the said extra overflow chamber substantially as herein
shewn and described, for the purposes specified.