Apparatus Adapted therefor.
Year: 1887

page_text: Date of Application, 9th Apr., 1887
Complete Left, 14th Dec., 1887
Complete Accepted, 27th Jan., 1888
Apparatus Adapted therefor.
We, WILLIAM DENT PRIESTMAN and SAMUEL PRIESTMAN, of Holderness Foundry,
Hull; in the County of York, Engineers, do hereby declare the nature of this
invention to be as follows:-
This invention relates to means for mixing liquids with gases and preparing
vapours wherein the liquid is so minutely subdivided and dispersed in the gaseous
medium that the tendency of the fluids to separate and resume their natural conditions
is greatly modified. Vapours prepared in accordance with our improved method are
applicable for use in various arts and manufactures; and the more perfect the vapour
in the sense above described, the better is it adapted for its purpose.
We are aware that in the Specification to Letters Patent granted to John Joseph
Reveley Humes, dated 1st February 1886, No. 1464, there is described and illustrated
an instrument for mixing liquid hydrocarbon with air in the preparation of com-
bustible vapour for operating liquid-hydrocarbon engines; such means including a
mixing nozzle in which two concentric tubes are employed for conveying the liquid
and gas respectively, the extremity of the passage for the latter being so formed as to
direct the gas obliquely across the stream of liquid as it issues from the extremity of
the enclosed pipe conveying the same, the two streams meeting at an acute angle.
We are also aware that it has been proposed to employ, in connection with the use
of hydrocarbon oils for heating and illuminating purposes, a mixing nozzle resembling
in certain features that above referred to and wherein the aëriform fluid is directed
obliquely across the stream of liquid.
According to our improved method of construction, we employ two tubes, the one
enclosed within the other, and respectively serving for the conveyance of the liquid
and gas to be mixed together. The inner tube terminates in a flat end, and the outer
tube terminates with an inwardly projecting annular lip; the space between the flat
end of the inner tube and the inner surface of the annular lip forming a passage at
right angles to the axis of the tubes. By these means, the fluid conveyed by the

page_text: outer tube, immediately before escaping therefrom, is directed at right angles towards
the stream of fluid issuing from the extremity of the inner tube; the separation of the
particles of liquid and their dispersion throughout the gaseous medium being thereby
thoroughly effected.
According to an alternative method of construction, the extremity of the inner tube
is formed with a conical or other recess; the lips of the outer tube being turned
inwards, so as to project into the said recess. In this instance, before the fluid
escapes from the outer tube, its direction of flow is partially reversed and is then
inclined towards the stream of fluid issuing from the extremity of the inner tube, the
two streams meeting at an obtuse angle.
G. G. M. HARDINGHAM,
191, Fleet Street, London, E.(.,
Agent for the Applicants.

page_text: Improvements in the Manufacture of vapour and in Mixing
Apparatus Adapted therefor.
We, WILLIAM DENT PRIESTMAN and SAMUEL PRIESTMAN, of Holderness Foundry,
Hull, in the County of York, Engineers, 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 :-
This invention relates to means for mixing liquids with gases and preparing vapours
wherein the liquid is so minutely subdivided and dispersed in the gaseous medium
that the tendency of the fluids to separate and resume their natural conditions is
greatly modified. Vapours prepared in accordance with our improved method are
applicable for use in various arts and manufactures; and the more perfect the vapour
in the sense above described, the better is it adapted for its purpose.
We are aware that in the specification to Letters Patent granted to John Joseph
Reveley Humes, dated 1st February, 1886, No. 1464, there is described and illus-
trated an instrument for mixing liquid hydrocarbon with air in the preparation of
combustible vapour for operating liquid hydrocarbon engines; such means including
a mixing nozzle in which two concentric tubes are employed for conveying the liquid
and gas respectively; the extremity of the passage for the latter being so formed as
to direct the gas obliquely across the stream of liquid as it issues from the extremity of
the enclosed pipe conveying the same, the two streams meeting at an acute angle.
We are also aware that it has been proposed to employ in connection with the use of
hydrocarbon oils for heating and illuminating purposes, a mixing nozzle resembling in
certain features that above referred to and wherein the aëriform fluid is directed
obliquely across the stream of liquid.
Mixing apparatus constructed in accordance with our improved method is repre-
sented in longitudinal section in Fig. 1 of the accompanying drawings. a and b are
tubes, the one enclosed within the other and respectively serving for the conveyance
of the liquid and gas to be mixed together. The inner tube a terminates in a flat end,
and the outer tube 6 terminates with an inwardly projecting annular lip; the space
between the flat end of the inner tube and the inner surface of the annular lip forming
a passage at right angles to the axis of the tubes. By these means, the fluid conveyed
by the outer tube, immediately before escaping therefrom, is directed towards the
stream of fluid issuing from the extremity of the inner tube in such a manner that the
two streams meet at right angles; the separation of the particles of liquid and their
dispersion throughout the gaseous medium being thereby thoroughly effected. The
tube a is connected with the supply pipe a', and the tube 6 communicates through the
chamber 6 with the supply pipe 62; the fluids to be mixed being respectively
delivered under pressure to the supply pipes a¹, b². c is a valve controlling the
passage leading to the tube a. dd are straining chambers charged with cotton wool,
whereby any solid impurities conveyed by the fluids are intercepted and their access
to the comparatively narrow passages appertaining to the mixing nozzle prevented.

page_text: According to an alternative method of carrying out our invention, represented in
longitudinal section in Fig. 2, the extremity of the inner tube a is formed with a
conical or other recess, and the lips of the outer tube 6 are turned inwards so as to
project into the said recess. With this type of construction, before the fluid escapes
from the outer tube, its direction of flow is partially reversed and is then inclined
towards the stream of fluid issuing from the extremity of the inner tube, the two
streams meeting at an obtuse angle. The tube a is connected with the supply pipe a¹,
and the tube b communicates through the chamber 61 with the supply pipe 62, as
before described with reference to Fig. 1. c is the controlling valve, which in this
instance is shewn as applied to both the passages conveying the fluids to be mixed.
dd are the straining chambers for filtering the respective fluids.
Having now particularly described and ascertained the nature of this invention and
in what manner the same is to be performed, we claim :-
1. The improved method of mixing liquid with gas substantially as herein
described and whereby vapour is produced having the particles of liquid very
minutely subdivided and dispersed in the gaseous medium.
2. The improved construction of vapouriser or mixing apparatus comprising two
concentric tubes to which the fluids to be mixed are respectively supplied under
pressure, the extremity of the outer tube being so formed in relation to that of the
inner tube that the two fluids are caused to meet at right angles to one another,
substantially as described with reference to Fig. 1.
3. The improved construction of vapouriser or mixing apparatus, comprising two
concentric tubes to which the fluids to be mixed are respectively supplied under
pressure, the extremity of the outer tube being so formed in relation to that of the
inner tube that the two fluids are caused to meet at an obtuse angle, substantially as
described with reference to Fig. 2.
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G. G. M. HARDINGHAM,
191, Fleet Street, London, E.C.,
Agent for the Applicants.