Improvements in Injectors or Apparatus for Lifting and Forcing Fluids and Feeding Steam Boilers.
Year: 1891

page_text: Date of Application, 17th Aug., 1891
Complete Specification Left, 17th Feb., 1892-Accepted, 19th Mar., 1892
PROVISIONAL SPECIFICATION.
Improvements in Injectors or Apparatus for Lifting and Forcing
Fluids and Feeding Steam Boilers.
I CHARLES SPENCER MADAN of The Mansfield Injector, Works, Crowther
Street, Regent Road, Salford in the County of Lancaster, Engineer do hereby
declare the nature of this invention to be as follows:-
My invention relates to an improved combination and construction of injectors
for lifting and forcing fluids and feeding steam boilers, the properties of lifting and
forcing being improved thereby.
The injector consists of a hollow cylindrical casting, provided with the usual
branches for the feedwater and overflow connections, and prepared at one end to
receive the steam nozzle, and at the other end to receive the combining and delivery
nozzles.
The connections may be made by means of flanges or unions, or other suitable
contrivance.
The combining nozzle is divided into two or more parts, secured in any con-
venient manner, and may be drilled with any number of holes to afford relief to the
jet at starting.
These divisions or holes are all in free communication with the main body or
cavity of the injector, and with the ordinary overflow or space between the
combining and delivery nozzle of the injector.
"
The overflow outlet of the injector, which is common to all the above divisions
or holes, is provided with an automatic valve, opening outwards, which closes when
the injector is in operation, but does not affect the free communication between the
divisions or holes in the combining nozzle and the ordinary overflow space between
the combining and delivery nozzles.
Dated this 15th day of August 1891.
CHARLES SPENCER MADAN.
COMPLETE SPECIFICATION.
Improvements in Injectors or Apparatus for Lifting and Forcing
Fluids and Feeding Steam Boilers.
I CHARLES SPENCER MADAN, of Mansfield Injector Works, Crowther Street,
Regent Road Salford, Manchester in the County of Lancashire, Engineer, do
hereby declare the nature of this invention and the manner in which the same is to
be performed to be particularly described and ascertained in and by the following
statement :-
My invention relates to an improved combination and construction of injector.
apparatus for lifting and forcing liquids and feeding steam boilers.
31-
1 will fully describe my invention in reference to the accompanying drawings
which form part of this Specification.
The figures are longitudinal sections on centre line, and the injector consists of
a hollow cylindrical body A divided by partition a into the main cavity R and
lifting chamber R₁ and provided with the usual openings for feed water B and
overflow C and prepared to receive at one end the steam nozzle D and at the other
the delivery nozzle E.
The connections may be made by means of flanges A' as shown in Sheet 1 or by
unions as in Sheet 2 or otherwise.
The combining tube or nozzle is divided as illustrated into two parts F', F, the
Pies 973

page_text: space between them ✗ (corresponding to and hereinafter called the "supple-
mentary" overflow) opening into the cavity R of the body A.
The part F may be either solid with the body as shown, or may be made
separately and secured in position in any convenient manner. The part Fis
secured to the delivery nozzle E as illustrated the space O intervening between
their oppositely coned interiors (hereinafter called the "ordinary" overflow) also
opening into the cavity R of the body A.
It will thus be seen that the supplementary overflow X, the ordinary overflow O
and the overflow outlet C are all in absolutely free and uninterrupted communi-
cation one with another through the cavity R.
The overflow outlet C, common to all the above openings, is provided with an
automatic valve H opening outwards to the pipe C' which may be provided with a
spring as in Figures 1 and 3, or may be arranged as in Figures 2 and 4 according
as the position in which the injector is to be fixed may require. The valve H is
normally closed but it is adapted to be at once opened by the pressure of the
overflow before the jet is established, and on the removal of the said pressure
when the jet is established it is automatically closed by the said spring as in
Figures 1 and 3, or by the action of gravity as in Figures 2 and 4.
The operation of the injector is as follows:-On turning on the live steam jet
through nozzle D it passes through raising the liquid through B to R' and
forcing same through F¹, X, F2, O, and cavity R, and all leakage until the jet
acquires sufficient velocity to pass direct on through E to the boiler passes freely
through C and valve H to outlet pipe C. When the jet is established and the
pressure of the overflow relieved, the valve H closes as described above and the
injector is in full operation; should the supply of steam or water fail temporarily
from any cause, on its restoration the above described action will be repeated, thus
rendering the apparatus perfectly automatic in its action.
The advantages gained by this arrangement are the more perfect working owing
to the overflows X and O being in free communication with each other, since any
leakage from the first one X will be sucked up by the jet through the second
one and passed on at and to the delivery, thereby effecting "dry working;" also
there are no moving nozzles, and the construction is simple owing to the absence
of curved internal partitions, etc. and therefore the apparatus is less costly to
manufacture.
I am aware that in ejector condensers and water raisers it has been suggested to
divide the combining tube at a point near its entrance orifice, or in lieu thereof to
pierce the combining tube with transverse slots or incomplete divisions at certain
points in its length so as to make the interior of the combining tube communicate
with the cavity and outlet overflow; also that in ejector condensers and water
raisers one supplementary overflow only, or transverse_slots has or have been
arranged in free communication with a valved outlet. But these appliances are
destitute of the condition which enables an injector, or boiler feeding appliance, to
work continuously against initial or back pressure, namely, the provision of
an overflow opening between the points of opposite divergence of the cones
of the combining and delivery nozzles, commonly known as the ordinary injector
overflow.
I am also aware that in injectors both a supplementary and an ordinary overflow
separated from each other by a valved partition have been used, and I lay no
claim to such constructions nor do I claim the construction of ejector condensers in
any way.
Having now particularly described and ascertained the nature of this inven-
tion and the manner in which the same is to be performed I declare that what I
claim is :-
1. The arrangement and construction of injectors for feeding steam boilers as
herein before described and illustrated in the drawings.
2. In injectors for the purpose specified, the combination of a divided combining

page_text: tube F F the division forming a supplementary overflow X, an ordinary over-
flow O between the points of opposite divergence of the cones of the combining and
delivery tubes, both said overflows arranged as described within the main cavity of
the body, and an automatic valve such as H situated in the overflow outlet C,
which also communicates with the said main cavity of the body, whereby a
perfectly free communication between all the said overflow outlets is provided at
the times, as, and for the purposes hereinbefore set forth.
Dated this 17th day of February 1892.
J. C. CHAPMAN,
Chartered Patent Agent, 70, Chancery Lane, London, W.C.,
Agent for Applicant.