Improvements in Apparatus for Producing and Diffusing Currents. of Air.
Year: 1895

page_text: Date of Application, 6th Feb., 1895
Complete Specification Left, 6th Nov., 1895-Accepted, 25th Jan., 1896
PROVISIONAL SPECIFICATION.
Improvements in Apparatus for Producing and Diffusing Currents.
of Air.
JOSEPH DEVONPORT FINNEY ANDREWS Engineer 45 Fulham Park Gardens
S.W. do hereby declare the nature of this invention to be as follows:-
This invention relates to improvements in appliances for producing, and delivering
currents of air, or other fluids for ventilation or other purposes. To generate a
current of air or fluid I employ a compressed fluid, such as steam or air which I
arrange to issue from an orifice or nozzle having a fluted, serated, or toothed edge,.
this nozzle I place in a tube or funnel with its axis in line therewith, and when a
current of air or other fluid issues from the nozzle a current of greater volume is
induced or generated through the funnel in the known manner. I sometimes
construct my toothed nozzle with a passage for air through its centre. When
I employ steam or other fluid compressed to a high degree, I prefer to use, a
compound nozzle consisting of a central orifice surrounded by concentric tubes
of suitable dimensions. When steam is used to issue from the nozzle as the air
current inducing fluid, I sometimes arrange a suitably shaped vessel filled with live
steam in front of the nozzle, or partly entering it, to avoid, as far as possible the
condensation of the steam soon after issuing. I also sometimes construct the
above mentioned concentric tubes with steam jackets. When I wish to create a
pressure of air, I employ a nozzle from which steam or high pressed air is directed
into a long funnel closed at the end farthest from the nozzle, which end I may
enlarge. From the enclosed end I take pipes to convey the compressed air.
I sometimes make the issue of the compressed air, intermittant and separate the
enlarged end from the first portion by a valve which would open with each impulse
of air that had become compressed.
For the purpose of effecting an even distribution of large quantities of air into
a room without draught I construct the nozzle so, that the air shall issue radially,
and I preferably serate, or corrugate the edges of the opening to prevent its issuing
in large columns.
let Hebruary 1805
J. D. F. ANDREWS.
COMPLETE SPECIFICATION.
Improvements in Apparatus for Producing and Diffusing Currents
of Air.
JOSEPH DEVONPORT FINNEY ANDREWS 45 Fulham Park Gardens, London,
S.W. Electric and Ventilating Engineer, 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 with reference to the
accompanying drawings which show diagrammatically several forms of the
apparatus:-
This invention relates to improvements in appliances for producing and delivering
currents of air or other fluids for ventilation or other purposes. To generate a

page_text: current of air or fluid I employ a compressed fluid such as steam or air which I
arrange to issue from an orifice or nozzle A Fig. 1 having a fluted serated or
toothed edge B. This nozzle I place within a tube C or funnel with its axis in
line therewith, and when a current of air or other fluid issues from the nozzle a
current of greater volume is induced or generated through the funnel, in the
known manner, I sometimes construct my toothed nozzle with a passage D Fig. 2
for induced air through its centre. When I employ steam or other fluid
compressed to a high degree I prefer to use a compound nozzle consisting of a
central orifice E Fig. 3 surrounded by a concentric tube F or tubes of suitable
dimensions. When steam is used to issue from the nozzles as the air current
inducing fluid I sometimes arrange a suitably shaped vessel G Fig. 4 filled with
live steam in front of the nozzle or partly entering it as at H, to avoid as far as
possible the condensation of the steam soon after issuing. I also sometimes
construct the before mentioned concentric tubes with steam jacket F Fig. 3. For
the purpose of effecting an even distribution of large quantities of air into a room
without draught I construct the nozzle so that the air shall issue radially I Fig. 5
and I may serrate or corrugate the opening so as to divide up the opening and
cause innumerable small rays of air to issue radially.
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 :-
1st. The construction of nozzle for inducing fluid currents having a toothed
orifice as described with reference to Figs. 1 and 2.
2nd. The construction of a nozzle for working with a condensible fluid provided
with heaters substantially as described with reference to Figs. 3 and 4.
3rd. The construction of nozzle for distributing air without draught substantially
as described with reference to Fig. 5.
Dated 6th November 1905
J. D. F. ANDREWS.