Improved Self Regulating Injector.
Year: 1897

page_text: Date of Application, 3rd Mar., 1897-Accepted, 3rd Apr., 1897
Improved Self Regulating Injector.
I, LUDWIG AHRBECKER, of No. 31, Grosse Aegidien Strasse, Hanover, in the
German Empire, Merchant, do hereby declare the nature of this invention and in
what manner the same is to be performed to be particularly described and ascertained
in and by the following statement :-
The object of the present application for Letters Patent consists in a new injector,
which permits of a high suction even in the case of water at a high temperature,
which works without special regulating arrangements and possesses in its separate
parts the greatest simplicity and accessibility.
Figure 1 of the accompanying drawing shows the injector in longitudinal section..
Figure 2 is a section on the line xx.
Figure 3 a section on the line y y.
In both of these the nozzles are supposed to have been taken out.
The injector envelope A supports the water supply pipe F which terminates in
the circular chamber W. This chamber W is provided above and below with screw
threaded apertures, which serve to hold the nozzles D and D¹. These nozzles are
of the usual form and arrangement. The nozzle cone d' projects into the crescent
shaped chamber K (see Figures 1 and 3), the latter terminates above at the height
of the bottom of the chamber W into the two openings 0 0 shown in Figure 2, and
widens itself out to the chamber L also crescent shaped, which shows the nozzles T
and T secured in the screw threaded holes of the upper and lower dividing wall.
The nozzle T¹ is provided with several openings s running from chamber L to the
nozzle tube; on one side of the chamber La channel P branches off and passes into a
projection of the envelope. This channel is usually held closed by means of the
valve V provided with a spring, and passes downwards beyond the valve and has at.
its lowest point a bore hole for the let-off cock and finally discharges into the
chamber M. This chamber possesses a circular shaped hole and the cone c¹ of the
nozzle T discharges therein. The chamber M is prolonged below and ends in
the piece U in which the back pressure valve N is inserted.
The cover of the
envelope provided with the nozzles D and T screwed therein is closed by the arched
piece C hermetically secured to it, on which is placed the connection E for the steam
pipe.
The method of operation is as follows:-
The steam from the boiler passing in through the piece E injects by passing through
the nozzle D the feed water supplied to the chamber W from the pipe and carries it
to the chamber K. From this chamber it rushes through the openings 0 0' into the
chamber L, where the water, if it be delivered in sufficient quantity, escapes over the
nozzle partitions and is carried along by the injected steam propelled through
the nozzle T into chamber M. The energy of the water thus carried forward
overcomes the resistance which presses upon the valve N closing the pipe leading
down into the boiler, opens the said valve and the water is thus injected into the
boiler. The water which at the commencement does not possess the necessary speed
or energy in consequence of condensation of the steam and other resistances, collects
in the chamber M and is let off through the let-off cock screwed into the tube P at r
which cock must be opened on the operation of the injector. The apertures in the
second water nozzle serve to lead back the excess steam on the suction of the injector
which would otherwise interfere with the formation of a vacuum, so that the same

page_text: reaches the surrounding channel from above. If too much water reaches the chamber L
and a surplus pressure is created herein, the same opens the valve V and leads off the
excess water through the channel P, from which place it can flow off through the
let-off cock, which operation continues until the normal condition is again replaced
and the valve V is closed.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is
1
A double injector consisting essentially of an outer envelope in which two injectors
of the usual construction are placed parallel to one another and in such a manner,
that the one consisting of a pair of nozzles D D' is contained in a special space closed
below whilst at the place where the upper nozzle D delivers into the lower nozzle D',
the water pipe is placed at the side, whilst the steam inlet to both pairs of nozzles is in
common; in which the lower nozzle of the other pair T T¹ possesses side holes below
the point where the upper vessel delivers into the lower one, and at which point a side
channel branches off, usually closed by a spring valve, which channel terminates below
in the main envelope at the opening of the lower nozzle of the injector TT, and at
which point is placed the boiler feed pipe provided with back pressure valve,
substantially as described.
Dated thin 2nd dove of March 1807
W. P. THOMPSON & Co.,
Of London, Liverpool, Manchester, and Birmingham,
Patent Agents for the Applicant.