Feeding Steam Boilers.
Year: 1885

page_text: Feeding Steam Boilers.
I, CHARLES SPENCER MADAN of Mansfield Chambers St Ann's Square Man-
chester in the county of Lancaster, Engineer do hereby declare the nature of my
invention for IMPROVEMENTS IN INJECTORS FOR RAISING AND FORCING FLUIDS
AND FEEDING STEAM BOILERS to be as follows:-
My Invention relates to an improved combination and construction of Injectors
rendering them capable of lifting the fluid acted upon to a greater height than is
usual in such apparatus and of re-starting automatically should the supply of fluid
fail for an interval and be restored. The construction will be best understood by
a reference to the drawings attached hereto. A. A A, is the body or casing of the
Injector. B, the steam nozzle. C, the upper part of the combining nozzle. D the
lower part of the combining nozzle E, the delivery nozzle made solid with, or
rigidly attached to D. F, the delivery passage. H, the steam connection. K, the
water connection. L, the overflow. M, a screwed cap securing D and E in their
places, and forming also the delivery connection. N. N. O. O. O. O. P. P. are
seatings. The sections 1. 2. and 5. 6. shew how the nozzles D and E are held in a
central position in such a manner as to leave them free to slide longitudinally.
The action of the Injector is as follows:-
According to the position of the Injector, the nozzles D and E either fall into
the positions shewn in the drawings, or are driven into it by the pressure of the
steam when it is turned on. The steam then passing through B and C and escaping
round the nozzle D between the seatings N. N. O. O. to the overflow L creates a
vacuum at K. raising the fluid into the Injector and pouring it in a continuous
stream through C whence it passes through D and E creating pressure in F which
acting on the end of the nozzle E, forces E and D in the direction of C, until the
seatings N. N. P. P. provided on the nozzles D and E respectively come in contact
with the seatings O. O. O. O. provided in the interior of the body A. A. A. thus
preventing the admission of air to the division between the two portions of the
combining nozzle, and also preventing the egress of water from F. The Injector is
then in perfect operation. The sections 3. 4 shews the construction at that point,
and the means of exit for any excess of fluid to the overflow.

page_text: My Invention described above may be modified as follows:-The lower end of the
nozzle E is rigidly attached to the body A, and the lower end of the nozzle D. instead
of being rigidly attached to the upper end of E is made to slide freely in it. On
steam being turned on the action is as described above except that the pressure of
the fluid at the point of section 3. 4 forces the nozzle D in the direction of C until
the seating N. N. comes in contact with the seating O. O. and the Injector is in
perfect operation as before.
In this case the seating P. P. with its corresponding seating O. O. are dispensed
with, a fluid tight joint being made at that point.

page_text: Plsing and forcing Fluids and
Feeding Steam Boilers.
I CHARLES SPENCER MADAN of Mansfield Chambers, St Anne's Square Man-
chester in the county of Lancaster Engineer do hereby declare the nature of my
invention and in what manner 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 Injectors
rendering them capable of lifting the fluid acted upon to a greater height than is
usual in such apparatus and of re-starting automatically should the supply of fluid
fail for an interval and be restored. The construction will be best understood by
a reference to the drawings attached hereto. AA A, is the body or casing of the
Injector, B is the steam nozzle. The combining tube is divided into two parts
of which C the upper part is formed in a bridge cast in the body A, and D the
lower part is attached to the delivery nozzle E; F is the delivery psasage, H the
steam connection; K the liquid or water connection, L the overflow, M a screwed
cap forming the end of the casing and the delivery connection. 0 0, 0' 0¹ are
circular seatings provided upon or in the body A, upon which rest the corresponding
faces of the circular flanges N N, P P, of the tube E when the primary overflow
(hereinafter described) is closed by the sliding of the compound tube D E. The
extended area which these flanges N N, P P, offer to the steam and water pressure
renders the necessary backward and forward motion of the sliding tube D E certain
and reliable. The over flow which takes place when the injector is started through
the space between the ends of the tubes CD and thence between the seatings 01 01
and the face NN I herein designate as the primary overflow." The ordinary
overflow between the tubes DE which is shown by the section 3-4 I herein
designate as the "secondary overflow." The diameter of the flange P P is less
than that of the surrounding casing so that a clearance space T is left which allows
the escape of steam through this space to the overflow L before the jet is established
and assists to prevent the premature motion of the sliding tube. This overflow
through the space TI berein designate as the "tertiary overflow."
"
The sections 1-2, and 5-6 show the wings by which the compound tube D E is
held in a central position in the body in such a manner as to leave the tube D E
free to slide longitudinally between the cap M and the seatings. This method of
supporting the tube by means of wings is especially of importance where water
which leaves a deposit is used as the wings are not liable to be clogged by deposit
and the free motion of the sliding tube is thus secured. The action of the Injector
is as follows :—
According to the position of the injector the compound tube D E either falls
into its normal position as shown in the drawings or is driven into it by the
pressure of the steam upon the parts D and its external flange N N when it is
turned on.
The steam then passes through B and C and escapes through the over-
flow L and creates a vacuum in K by means of which the water or liquid is raised
or drawn into the injector and pours it in a continuous stream through C whence
it passes through D and E into F. Should any steam pass through the tube E it

page_text: can escape through the "tertiary overflow" T into the overflow and the form of
the compound tube and its flanges is such that the total effect of the steam upon
the compound tube will tend to keep the "primary" and "tertiary" overflows
open until the injector has lifted its water and the jet is established. This
prevention of premature closing of the primary overflow is a point of considerable
importance. As soon as the jet is fairly established the pressure of the delivered
water acting on the surface E¹ of the flange P P forces the compound tube back-
wards against the jet until the faces of the flanges N N, PP come in contact
simultaneously with the seatings 0' 0¹00 formed in the interior of the body A
thus automatically closing the "primary" and "tertiary" overflows, but at the
same time leaving the secondary overflow fully open. When the "primary
overflow is closed by the flange N N coming on the seating 01 0¹ a space is still
left between the ends of the tubes C and D. The injector is then in perfect action
and will so remain until its working is interrupted. When this occurs the space Q
which exists between C and D even when the overflow is closed, admits the steam
to the chamber R and the compound tube D E is forced thereby into its normal
position so that the injector can start itself again, the whole action being
automatically repeated.
"
Regulation according to the pressure of the steam used and the quantity of fluid
desired to be delivered may be provided for by means of a cock or similar suitable
contrivance upon the liquid supply pipe K of the injector. Although the overflow
connection is shown in the drawings on the same side of the body as the water
connection it may be placed in any convenient position.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed I declare that what
I claim is :-
1.) An injector having primary, secondary and tertiary overflows constructed and
arranged so that whilst the secondary overflow is always kept fully open the
primary and tertiary overflows are automatically opened and closed by the motion
of the compound tube D E substantially as herein before described.
2.) The compound tube D E provided with orifices for the secondary overflow
which are always open and having the flange N N and the corresponding seating 0¹0¹
arranged and operating so as to open and close the primary overflow substantially
as hereinbefore described.
3.) The compound tube D E with its flanges N N P P arranged so that the
pressure of the steam tends to keep the primary overflow open until the jet is
established thereby preventing premature closing of the primary overflow sub-
stantially as herein before described.
4.) The compound tube D E with its openings for the secondary overflow and its
flanges N N, P P, arranged and operating in conjunction with the other parts of
the apparatus substantially as herein before described.
5.) The combination of parts forming my improved Injector arranged substantially
as herein before described and illustrated by the drawings annexed.
th dose of Anoat 1986
J. C. CHAPMAN,
Agent for Applicant.