IMPROVEMENTS IN INJECTORS FOR RAISING AND FORCING WATER
Year: 1884

page_text: 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 our invention for IMPROVEMENTS IN
INJECTORS FOR RAISING AND FORCING WATER to be as follows:-
Our Improvements relate to that class of Injectors which raise or force water or
other liquid by means of steam at a low pressure such as the exhaust steam from
Steam Engines.
For this purpose we employ a steam jet or nozzle in front of which we place a
combining tube such combining tube being placed so as to leave a space or opening
between one end thereof and the end of the steam jet or nozzle previously referred
to, we enclose such space or opening above named within a chamber such chamber
being supplied by means of pipes with the water or other liquid to be raised or
forced-A continuation of the above named combining tube we enclose within a
chamber and we form an opening or openings in the said combining tube by which
the interior of the before named combining tube is in communication with the
interior of the chamber previously referred to by which such tube is surrounded-
The direction of the aforesaid opening or openings may be at any suitable angle
with the axis of the said tube and the apertures formed in the interior of the
combining tube by these openings may lie in any position relative to the axis of
the said combining tube-Through the side of the before named chamber we form
an opening such opening being provided with a valve by which it may be closed.
A continuation of the above named combining tube communicates with the .
boiler or other vessel into which water or other liquid is to be raised or forced
passing from the combining 'tube to and through a delivery tube as in ordinary
injectors.
When steam is caused to issue from the before named jet or nozzle the water or
other liquid will be caused to pass into the tube previously referred to and will
pass through the opening or openings leading from the interior of the said
combining tube to the chamber previously referred to and through the opening
formed through the side thereof until the water or other liquid is caused by the
steam to attain such velocity as to pass along the before named tubes and into the
boiler or other vessel to which water is to be supplied upon which a partial
vacuum being formed in the previously named chamber the said valve would close
the opening before referred to, which will remain closed until the steam or water

page_text: supply be interrupted when the condensed steam and water will cease to pass along
the above mentioned tubes thereupon the valve before named will again leave the
above named opening and the steam and water will escape thereby until the steam
and water again pass along the aforesaid tubes upon which the valves above
referred to will again close the before named opening thus rendering the apparatus
automatic as regards restarting.
The tube before referred to is provided with an opening or overflow as usual
between the end of the combining tube and the delivery tube, by which air or
vapour may escape such opening or openings 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-The above named opening must have no
communication with the chamber into which the aperture or apertures in the
combining tube before referred to lead.
In some cases we cause the aperture or apertures formed in the combining tube
to communicate with the chamber into which the ordinary overflow is discharged
such chamber having an opening formed through the side thereof and we provide
such opening with a valve which is closed when the injector is at work.
In some cases we dispense with the valve above referred to and leave the opening
between the steam jet or nozzle previously referred to and the combining tube at
all times in communication with the atmosphere.

page_text: 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 that class of injectors which raise or force water or
other liquid by means of steam at a low pressure such as the exhaust steam from
steam engines and our invention consists in the application to such injectors of the
improvements described in the Specification to our application for Letters Patent
of 4th Feb 1884, numbered 2659. In order that our invention may be fully
understood and carried into effect we will now proceed to describe the same by
reference to the drawings hereunto annexed. Fig 1 is a longitudinal section of an
injector constructed according to our invention and Fig 2 is a cross section taken
on the line A B of Fig 1. Fig 3 is a cross section on the line A¹ B¹ Fig 1 and
Fig 4 is an end view of a taper spindle and carrying ring a is the casing of
the injector, and b is the steam nozzle or jet by means of which nozzle or jet b
steam is supplied to the injector. c is a taper spindle carried by wing pieces d
formed within a ring e screwed within the nozzle or jet b. The axis of the taper
spindle c is coincident with that of the nozzle or jet b within the casing a and
surrounding the steam jet or nozzle b is a chamber C. At f is the combining tube
supported by the casing a and terminating at f¹-Within the casing a of the
injector and around a portion of the length of the combining tube f we form a
chamber D. Through the sides of the combining tube f we form openings g which
form a supplementary overflow.
The openings g may be readily formed by making holes through the sides of the
combining tube and connecting such holes by slits g communicating with the
interior of the chamber.
We would have it understood that we do not confine ourselves to the use of
openings g of the particular form shown as such openings g may be formed at
any convenient angle to the axis of the combining tube f.
In the casing a we form an opening in which is secured by screwing or by other
convenient means a tube h the end of which tube h is closed by means of a valve j
such valvej turning upon a pin k carried by ears 7 formed upon the tube h-Upon
the casing a we form a flange m to which is secured a cap n such cap n having an
opening into which is screwed a pipe o. The valve rests upon and by its weight
closes the end of the tube h.
At p is the delivery tube of the injector between the end pl of which delivery
tube P and the end f1 of the combining tube f we form the ordinary overflow E,
which overflow communicates with the chamber F which chamber F is formed
within an extension of the combining tube f and surrounds a portion of the length
of the delivery tube p.
The delivery tube p is connected to the combining tube f by wing pieces q.
The chamber F communicates by means of a passage G with the overflow pipe o
with which the pipe h at certain times as will be hereinafter pointed out also
communicates. The delivery tube p communicates by means of the openings r and
the pipe s formed upon the casing a with the steam boiler or other vessel, to which

page_text: water or other liquid is to be supplied. The action of the parts above described is
as follows-water or other liquid is supplied by means of the pipe to the
chamber C which chamber is situate below the level of the supply of water or
other liquid. Upon the water or other liquid being supplied to the chamber C
such water or other liquid will flow along the combining tube f through the
openings g and space E between the end f1 of the combining tube f and the end pl
of the delivery tube p into the overflow pipe o, the valve not being of sufficient
weight to withstand the force of the water supplied to the injector. Upon steam
being allowed to issue from the nozzle b it will be condensed by the water or other
liquid flowing along the combining tube f and the condensed steam and along with
it the water or other liquid will escape by the openings g and the space E until
from the condensation of the steam the water or other liquid will be caused as will
be well understood by persons conversant with injectors to flow along the combining
tube in the direction of the arrow H with sufficient velocity to pass along the
delivery tube p and pipe 8 into the steam boiler or other vessel to be supplied with
water or other liquid. As soon as the water or other liquid and the condensed
steam pass along the delivery tube pa partial vacuum will be formed within the
chamber D and the valve j being no longer pushed open by an exit of the steam
water or other liquid will again assume its normal position and close the pipe h and
thereby separate the chamber D and openings g from the opening or space E and
from the external air. If from any cause the supply of steam or of water or other
liquid to the injector becomes interrupted there will cease to be a vacuum within
the chamber D thereupon the valve will only be kept against and close the pipe h
by its own weight and the condensed steam, water or other liquid or condensed
steam and water or other liquid may again escape by the pipe h but upon the water
or other liquid and condensed steam again attaining sufficient velocity to pass along
the delivery tube p a partial vacuum will be again formed within the chamber D
and the valvej will be again pressed against and close the pipe h.
Although we have only shown one arrangement of valve for separating the
supplementary overflow opening or openings from the ordinary overflow opening E
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.
By means of the arrangements above described we render the injector automatic
so far as regards restarting and also prevent the indraught of air or vapour at the
openings g during the time the injector is at work.
The combining tube fand delivery tube p may be or are adjusted when required
relatively to the steam nozzle or jet b by means of screw threads formed upon a
piece carrying the delivery tube p and casing a respectively and by means of the
nut u in the following manner :-
When an increased quantity of water or other liquid is required to be supplied
by the injector the combining tube f and delivery tube p are moved in the direction
of the arrow H so as to increase the distance between the end 61 of the steam
nozzle or jet b and the combining tube f. When a less amount of water or other
liquid is required to be supplied by the injector the delivery tube P and combining
tube fare moved in a direction opposite to that of the arrow H.
By the use in conjunction with each other of the spindle o valve ; chamber D
and fixed openings g a greater efficiency and certainty of action of the injector is
obtained and such injector is rendered especially applicable to those situations, such
as those for instance in which the exhaust steam from a steam engine or engines is
employed to work the injector or 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.
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
1 The improved injector adapted to work with low pressure or exhaust steam
substantially as described in the above specification and shewn in the drawings
annaved thorota

page_text: 2, In an injector the combination and arrangement for forcing liquid by means
of steam at low pressure, such as exhaust steam from a steam engine, of a steam
nozzle with central guide spindle, a combining tube with slots or openings such as
described to a supplementary or overflow chamber or chambers and means whereby
after the injector has been started the supplementary overflow chamber or chambers
s or are shut off from the ordinary overflow and access of air to the combining
ube is prevented substantially as described.