Improvements in Ejector Condensers.
Year: 1891

page_text: COMPLETE SPECIFICATION.
Improvements in Ejector Condensers.
I, OTTOCAR LINDEMANN, Engineer, of 86, Queen Street, Cheapside, London,
E.C., 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 :-
My invention has for its object to vary the length of the water jet in a jet-
condenser and thus to vary the surface of the condensing jet by means of a movable
receiving nozzle, thus increasing or decreasing at will the distance between the
throat of this receiving nozzle and the mouth of the water nozzle.
With this arrangement it is of advantage to distribute the steam inlets to the
interior of the condensing tube over the whole length of this tube in such a way
that by moving the said receiving nozzle a greater or less number of the apertures
for the admission of the steam are covered and thus cease to be effective.
I obtain by the said movability of the receiving nozzle with this construction of
the condensing tube, that the surface of the condensing jet can be of any desired
proportion to the total area of the steam apertures, and that the capacity of the
condenser is rendered very variable without influencing the obtained vacuum to any
great extent.
The condensing tube may consist of one piece with holes bored in or of a series of
nozzles arranged one behind the other with spaces between.
The receiving nozzle may be moved by hand or should the condenser be applied
to a steam engine worked under a variable load, the mechanism for the regulation of
the engine may be connected with the movable nozzle in such a way that the
receiving nozzle is moved forward or backward from the mouth of the water nozzle
automatically and proportionately as the power of the engine is greater or less.
It is also of advantage in the case where the condenser requires for its effective
working the supplementary assistance of a jet of a pressure liquid or fluid to connect
the moving arrangement of the nozzle in such a manner with the shutting off
arrangement of this pressure fluid that when the receiving nozzle is pushed in the
aperture for the admission of such liquid or fluid be opened, and when the receiving
nozzle is drawn out, the aperture is closed.
Figs. 1 and 2 on the annexed drawing represent in section and elevation a jet
condenser with movable receiving nozzle and a nozzle for the admission of a pressure
liquid or fluid arranged in the centre of the water nozzle.
a is the water nozzle, 6 the receiving nozzle, c the condensing tube with the steam
apertures d d, distributed over the surface. The receiving nozzle has a cross-piece
attached at its end which is connected to the rod / passing out into the open through
an orifice in the delivery pipe g, and by means of which the receiving nozzle 6 can
be moved from the outside either by hand or automatically as described above. c is
the water supply pipe, n the nozzle for the pressure liquid or fluid inside the water
nozzle a.
The moving of the receiving nozzle b, by hand can be effected in numerous ways,
either by a lever, a rack or screw. It is shown in the accompanying drawing as
worked by a lever o, which can be locked at any point by means of a toothed
quadrant and catch.
The lever o as drawn can be so brought into connection with the valve controlling
the supply of the pressure liquid or fluid for the starting of the condenser that, when
the receiving nozzle 6 is pushed in, the valve for the admission of this liquid or fluid
is opened, and when it is drawn out closed.

page_text: Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what
I claim is :-
1. The introduction in water jet condensers of a receiving nozzle 7 movable from
the outside which fits into the cylindrical condensing tube c, upon the surface of
which the steam apertures d d are distributed in such a manner that in accordance
with the distance, which the receiving nozzle is pushed in or drawn out, a less or
greater number of such steam apertures are shut off, substantially as described.
2. In water jet condensers the connection of the arrangement for moving the
adjustable receiving nozzle with the valve for shutting off the pressure liquid or
fluid which may be requisite for the starting of the condenser in such a way that
the opening of the shut off valve corresponds to the pushing in of the receiving
nozzle and the closing of this valve to the drawing out of the nozzle, substantially
as specified.
Dated the Ninth day of March 1891.