A New or Improved Construction of Ejector.
Year: 1899

page_text: Date of Application, 20th Apr.,
1899
Complete Specification Left, 22nd Jan., 1900-Accepted, 24th Feb., 1900
PROVISIONAL SPECIFICATION.
A New or Improved Construction of Ejector.
We, DAVID NOBLE BERTRAM and SAMUEL MILNE, both of St. Katherine's Works,
Sciennes, Edinburgh, Engineers, do hereby declare the nature of our said inven-
tion to be as follows:-
-
This invention relates to and consists of a novel construction of ejector in which
the valve and jet nozzle for controlling and producing the jet causes such jet
to be of an annular, instead of a solid formation, thereby affording a larger area
of extraction for the same volume of liquid or fluid, and such valve and the jet
nozzle are so operated or controlled that the relation of one to the other, and
to the opening through which the extraction takes place, can be readily varied,
with the consequent advantage of perfect control of the jet and the ejection.
According to our invention we form the ejector more or less of the ordinary
exterior form, with the usual jet inlet ejection inlet, and delivery outlet, but in
lieu of a narrow spindle valve acting downwards within a narrow jet nozzle, wo
employ a valve which acts upwards and against a wider jet nozzle. Such valve
tapers upwards from its widest part, and projects into the nozzle, hence in relation
to the mouth of such nozzle the valve produces an annular jet orifice and con-
sequently the aforesaid annular jet.
The said valve also tapers from its widest part downwards and the effect of
the conical parts (in addition to forming the said annular jet orifice) is to start
or create the annular jet gradually, and allow the jet to decrease gradually.
Instead of the valve operating under an upward movement to produce and
regulate the annular jet, it may operate under a downward movement by lying
immediately within the jet nozzle or the jet nozzle may be operated, or both
nozzle and valve.
The opening through which the extraction takes place is, or may be, controlled
by the adjustment of the valve or nozzle aforesaid, or by the adjustment of a
further nozzle, or part of the ejector casing adapted to move upwards or towards
the other nozzle, our object being to afford absolute control of the annular jet
and the opening through which the fluid or liquid to be ejected is operated upon
by the jet.

page_text: and in what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement:
-
This invention relates to and consists of a novel construction of ejector in which
the valve and jet nozzle for controlling and producing the jet causes such jet
to be of an annular, instead of solid formation, thereby affording a larger area
of extraction for the same volume of liquid or fluid, and such valve and the jet
nozzle are so operated or controlled that the relation of one to the other, and
to the opening through which the extraction takes place can be readily varied,
with the consequent advantage of perfect control of the jet and the ejection.
According to our invention we form the ejector more or less of the ordinary
exterior form, with the usual jet inlet, ejection inlet, and delivery outlet, but in
lieu of a narrow spindle valve acting downwards within a narrow jet nozzle, we
employ a valve which acts upwards and against a wider jet nozzle. Such valve
tapers upwards from its widest part, and projects into the nozzle, hence in relation
to the mouth of such nozzle the valve produces an annular jet orifice and con-
sequently the aforesaid annular jet.
The said valve also tapers from its widest part downwards and the effect of
the conical parts (in addition to forming the said annular jet orifice) is to start
or create the annular jet gradually and allow the jet to decrease gradually.
Instead of the valve operating under an upward movement to produce and
regulate the annular jet, it may operate under a downward movement by lying
immediately within the jet nozzle, or the jet nozzle may be operated, or both
nozzle and valve.
The opening through which the extraction takes place is, or may be, controlled
by the adjustment of the valve or nozzle aforesaid, or by the adjustment of a
further nozzle, or part of the ejector casing adapted to move upwards or towards
the other nozzle, our object being to afford absolute control of the annular jet
and the opening through which the fluid or liquid to be ejected is operated upon
by the jet.
To make our invention clear we have hereto annexed a sheet of drawings in
which:-
Fig. 1 is a vertical section, and Fig. 2 a plan (partly sectional) of an ejector
constructed in accorance with our invention. Fig. 3 is a vertical section of the
ejector slightly modified.
(a) is the body of the ejector, (b) the jet nozzle, (c) the jet inlet, (d) the
ejector inlet, and (e) the delivery outlet. (f) is the double conical valve by
which the annular jet is formed and regulated under the adjustment of the screw
threaded valve spindle (g) and hand-wheel (h).
In Fig. 1, we shew the valve adapted to close the jet orifice by a downward
movement, and in Fig. 2, we shew the valve adapted to close to jet by an upward
movement. In both constructions of the ejector the ejection orifice is shewn
controlled by the delivery pipe (e) which screws into the body (a), and after
adjustment, to the required extent, is held by a nut (i) screwing against the
shoulder (*).
The effect of the conical formation of the valve is to start the jet gradually
and allow its velocity to decrease gradually. As a modification the lower or
upper portion only may be conical.
In Fig. 2 it will be seen that we provide for three adjustments, viz:--the
raising and lowering of the valve (f), the raising and lowering of the outlet
nozzle (b). This latter is screw threaded at (6) and is adjusted by the gland (j)
and wheel (k).
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed we declare that what
we claims is:-
1. An ejector consisting of an outer casing with jet inlet, ejector inlet, and

page_text: delivery outlet, a jet nozzle, a double coned valve lying within said jet nozzle
and adapted, in conjunction with the said nozzle, to form and regulate an annular
jet, and an ejection nozzle, fixed or adjustable in relation to the jet nozzle, sub-
stantially as and for the purposes set forth.
2. An ejector consisting of outer casing, an adjustable jet nozzle, an adjustable
double coned valve, and an adjustable ejection nozzle, arranged and operating,
substantially as set forth.
3. The combination and arrangement of parts substantially as herein set forth
and illustrated in Fig. 1, or Fig. 2 of the accompanying drawings.
Dated this 15th day of January 1900.
DAVID NOBLE BERTRAM.
SAMUEL MILNE.
By John G. Wilson & Co., Fels. I.P.A.,
Agents, Manchester.
DAVID NOBLE BERTRAM.
SAMUEL MILNE.
By John G. Wilson & Co., Fels. I.P.A.,
Agents, Manchester.