IMPROVEMENTS IN INJECTORS FOR RAISING AND FORCING WATER AND OTHER LIQUIDS
Year: 1884

page_text: We HARRY HOLDEN of St Simon Street Salford in the County of Lancaster
Engineer ROBERT GRUNDY BROOKE of the same place Engineer and THOMAS
HENRY WHITE of Ordsall Terrace Crowther Street Salford aforesaid Engineer do.
hereby declare the nature of our invention for IMPROVEMENTS IN INJECTORS FOR
RAISING AND FORCING WATER AND OTHER LIQUIDS, to be as follows:-
.
Our improvements relate to that apparatus known as injectors used for raising
or forcing water or other liquids and consists in arrangements by which the
efficiency of such injectors is increased.
For this purpose we form within the outside casing of the injector a chamber.
which surrounds an opening or space formed between the tube commonly called.
the lifting tube and the combining tube. By this means steam issuing from a jet
or nozzle raises the water or other liquid and propels it into what is commonly
called the combining tube or cone. Through the side of the chamber above referred
to we form an opening such opening being provided with a valve by which it may
be closed. The combining tube previously named has openings formed therein
which communicate as usual with a steam boiler or other vessel into which water
or other liquid is to be forced or lifted. Upon causing steam to issue from the
above named steam jet or nozzle water or other liquid will be drawn into a chamber
such chamber being in communication by means of pipes with the supply of water
or other liquid and such water or other liquid will by the steam above referred to.
be carried through the lifting tube and such steam and water will escape by the
opening formed in the chamber previously named until the said jet of steam and
water pass through the combining tube to the boiler or other vessel into which the
water or other liquid is to be forced or lifted. When the water or other liquid and
condensed steam pass through the combining tube a partial vacuum will be formed
in the previously mentioned chamber the valve will close the opening above
referred to which will remain closed until the steam or water supply be interrupted
when the condensed steam and water will cease to pass along the above mentioned
combining cone or tube there upon the valve will again leave the previously named
opening and the steam and water will escape thereby until the jet of steam and
.

page_text: water again pass along the combining cone or tube when the valve will again close
the opening before named thus, rendering the apparatus automatic as regards
restarting.
The combining tube before referred to is provided with an opening or overflow
as usual by which air or vapour may escape such opening or openings aforesaid
communicating with a chamber in which the said air or vapour may pass and may
escape by an opening formed through the side of such Chamber.
Dated this second day of February 1884.
W. T. CHEETHAM,
Agent to the Applicants.
We, HARRY HOLDEN, of Saint Simon Street, Salford, in the County of
Lancaster, Engineer, ROBERT GRUNDY BROOKE, of the same place, Engineer, and
THOMAS HENRY WHITE, of Ordsall Terrace, Crowther Street Regent Road,
Salford, aforesaid, Engineer do hereby declare the nature of said invention for
IMPROVEMENTS IN INJECTORS FOR RAISING AND FORCING WATER" and in what
manner the same is to be performed to be particularly described and ascertained
in and by the following statement :-
"
..
Our improvements relate to the apparatus known as injectors used for raising
and forcing water or other liquids and consist in arrangements by which the
efficiency of such injectors is increased. In order that our invention may be fully
understood and readily carried into effect we will now proceed to describe the
same by reference to the drawing hereunto annexed, in which Fig 1 is a longitudinal
vertical section of an injector constructed according to our invention. Fig 2 is a
cross section taken on the line A. B of Fig 1. The steam jet or nozzle is at a and
the tube which we will for convenience call the lifting tube is at b. At c is the
combining tube and at c³ is the delivery tube through which the water or other
liquid is delivered into the boiler or other vessel and at d is the tube or opening
through which the water or other liquid to be raised or forced is admitted to the
injector.
When the injector is at work the tubes b and c together act as an ordinary
combining tube. The end 6 of the lifting tube 6 and the end c¹ of the combining
tube c are situate within a chamber C which chamber C. is formed within the
casing e of the injector The overflow opening f formed between the smaller end
of the combining tube c and the adjacent end of the delivery tube c² we also
enclose within a chamber D formed within the casing e of the injector. For
convenience of description we shall hereinafter refer to the space E between the
end 6' of the lifting tube b and the entrance c¹ to the combining tube c as the
supplementary overflow E and to the overflow opening fas the ordinary overflow
op+ning.
Through that portion of the casing e² surrounding the chamber C we form an
opening g provided with a valve h by which valve h such opening g may at times
be closed. The valve h is provided with a shank or spindle k which shank or

page_text: spindle k passes through and is capable of being slidden within a tube carried by
a cross bar m formed upon the union n which tube 7 serves as a guide to support.
the valve h and keep it in position when passing on to its seat.
The union n is secured by screwing or in any other convenient and suitable
manner to the casing e. The chamber Ď communicates with the cavity F between
the union n and casing e¹.
The union n is formed with an opening G communicating with a pipe o by
which steam air or water or other liquid may escape when necessary from the
chambers C. D and cavity F. In order to enable the valve h to readily close the
opening g we in some cases provide a spring p one end of which spring p abuts
against the cross bar m and the other end of such spring p presses against the back
of the valve h.
Upon steam being allowed to issue from the jet or nozzle a such steam will pass
through the tube b and thence by the supplementary overflow E the combining
tube c and opening f away through the opening F, the pressure of the steam
issuing from the nozzle a forcing the valve h from its seat against the pressure of
the spring p or against the weight of such valve when no spring is employed such
spring when used being formed of such strength as to be readily compressed by
the steam issuing from the nozzle or jet a.
The steam issuing from the nozzle a and passing through the tube b will produce
a partial vacuum within the chamber H enclosed within the casing e of the injector
and water will be drawn into the chamber H and will with the steam issuing
from the jet or nozzle a pass through the lifting tube 6 in the direction of the
arrow J.
The steam and liquid issuing from the lifting tube b will flow into the chamber C
and combining tube c and escape therefrom by means of the opening g and the
ordinary overflow f until such steam and liquid -issue from the lifting tube b and
combining tube c with sufficient velocity to pass through the delivery tube c² and
into the steam boiler or other vessel to which water or other liquid is to be supplied;
when a partial vacuum will be formed within the chamber C and the valve h will
then be held tightly against its seat and so securely close the opening g thereby
preventing the external air or air or vapour from the ordinary overflow opening f
from passing to the entrance c' of the combining tube c.
When the injector is at work the valve h will keep the opening g closed as
above described and will at such times prevent any communication between the
ordinary overflow opening f and the chamber C.
If the supply of steam or of water or other liquid to the injector be interrupted
from any cause and steam and water or other liquid cease to pass along the
combining tube c and delivery tube c³ the said steam and water or other liquid will
again as hereinbefore described escape from the supplementary overflow E into the
chamber C and from such chamber C through the opening g until the steam water
or other liquid issue from the lifting tube b and combining tube c with sufficient
velocity to pass along the delivery tube when the valve h will again close the
opening g.
By means of the supplementary overflow opening E used in conjunction with the
valve h the injector is rendered automatic so far as regards restarting and more
efficient and more certain in its action and it is thereby rendered suitable for use
in situations in which ordinary injectors could not conveniently be employed such
as upon traction engines, steam ships or other similar situations in which the
injector would be subject to shocks or jolts or to having its supply of steam or of
water or other liquid interrupted.
Although we have only shown one arrangement of valve for separating the
supplementary overflow opening or openings from the ordinary overflow opening f
and the external air we do not confine ourselves to the use of the particular
form of valve shown and described as other arrangements of valves may be
employed.

page_text: We have hitherto for convenience of description shewn and described our
improved injector as being provided with one supplementary overflow opening E
only but we would have it understood that our invention may be employed with
advantage in other forms of injector than that illustrated such as for instance
injectors in which there are more than one supplementary overflow opening or
openings as in the form of injector described and shown in the specification filed
in reference to our application for Letters Patent No 2756 dated February 5th 1884
in respect of "Improvements in injectors for raising and forcing water" which
improvements are not claimed as forming any part of our present invention.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed, we declare that what
we claim is :-
The improved form of injector wherein the ordinary and supplementary overflows
are led to the same outlet but separated from one another by a self acting valve
substantially as described in the above specification and shewn in the drawings
annexed thereto.