Improvements in and in connection with Air Propelling and Moistening Apparatus.
Year: 1893

page_text: Date of Application, 8th Nov., 1893-Accepted, 23rd Dec., 1893
COMPLETE SPECIFICATION.
Improvements in and in connection with Air Propelling and
Moistening Apparatus.
I OTTO HOFFMANN of 46 Cresswell Grove, Withington, Manchester, in
the County of Lancaster, 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 and accompanying
drawings:-
My invention relates partly to a former invention for which Letters Patent
In such former
Number 20736 of the year 1892 have been applied for by me.
invention a double water jet was enclosed within a casing of special construction
and delivered a cone of spray which propelled a current of air through such casing
such air being delivered in a moistened condition.
In my present invention I form the shell or cylindrical part of the casing of
corrugated sheet metal or provide the shell with ledges the corrugations or ledges
running around the casing and being intended to cause the liquid striking the
casing to rebound or fly off.
I also prefer to make the mantle at the lower end of the casing and the dish with
radial corrugations or flutes.
The shell may be used in connection with the double jet or with a suitable
spraying nozzle.
In a simpler form of nozzle a single jet of water is discharged against the end
of a tubular disperser or upon a globular disperser.
To obtain the necessary water pressure I propose to use an injector arranged by
preference to deliver the water into an air vessel in communication with the piping
connected with the spraying nozzle or nozzles.
In order that my invention may be clearly understood I will describe the same
with reference to the accompanying drawings.
In the said drawings
Fig. 1 is an outside view of the improved casing.
Fig. 2 is a corresponding view partly in section and shows the spraying nozzle
constructed in accordance with my invention in position.
Fig. 4 represents a section of the said spraying nozzle.
с
In Figs. 1 and 2 a is the cylindrical shell b is the mantle and c is the dish. The
lower part of the shell is corrugated as clearly shown in the drawings.
It will be apparent that the inwardly obtruding angles a constitute conical
ledges for the streams of water to strike against. The nozzle d is designed to
spread the issuing water in all directions radially and downward so as to form a
hollow cone of spray and the intention is that the spray or fine streams of water
so thrown off shall meet with the water issuing from the nozzle. The result will be
a more complete breaking up of the particles of water than when a smooth
casing is used therefore a larger proportion of water will be carried out with the
current of air. The mantle is shaped with larger flutings or corrugations. The
dish c is similarly fluted the number of flutings or curves in each part being

page_text: the same so that the ridges b¹ c¹ between the curves of the two parts can meet
together and be secured by means of rivets or suitable fastenings as indicated at e.
As the hollows of the flutings in the two parts are opposed to each other such
hollows form outlet mouths for the escape of the currents of moistened air.
Water deposited upon the inner surface of the mantle will tend to flow toward
the ridges and will be conducted to the points of connection e where the water
can flow toward the centre of the dish and escape through the central opening
at f. The part would be adapted to be coupled to a waste pipe which would
convey away the surplus water as in the case of my former apparatus hereinbefore
referred to.
Fig. 3 illustrates a modification in the shell a.
In this case the shell would be plain and would have conical deflecting rings h h
attached to: the inside of the shell these. rings. being intended to act as in
the case of the ledges a¹. The form and proportions of the corrugations may be
varied so long as the ledges to deflect the water are provided and if preferred
the angles which such ledges would make with the shell a' might vary in the
.same shell.
The improved casing may be used in combination with the double jet nozzle used
in my said former invention or with a suitable spraying nozzle.
The nozzle d is illustrated about the full size in section by Fig: 4.
A chamber g is formed in the body d of the nozzle and is closed by means of a
removable screw cap d'. A ledge d³ is formed inside the said chamber below the
water.inleth and sustains a filtering basket i formed of or covered with fine wire
gauze. Any fluff or particles of foreign matter which might' tend to block the
mouth of the nozzle are intercepted by this basket. The basket can be lifted out
and emptied at intervals the cap d' being first removed. The said cap is formed
with an annular channel to receive the end of the body'd so that any escaping
water would be directed downward.
I do not claim any novelty in the filter excepting in that the water flows into the
basket and passes out through it's sides so that intercepted matter can be lifted out
with the basket.
The delivery mouth d discharges directly upon the end of a tubular disperser j.
The upper end of this disperser is in the form of a thin tube. of about the same
diameter as the discharge mouth d. The said upper end is represented larger than
the full size by Fig. 5. In the example the tubular part is formed by drilling a
hole in a solid stump which is adjustable in an arm k which is cast in one piece
with the mouth piece of the nozzle but if preferred a thin tube might be fixed in a
hole drilled in such stump as indicated by the dotted lines as for example a tube
might be made by: bending thin sheet steel and be hardened to lessen the wear.
An important feature of the tubular disperser is that the wearing of the top end
of the disperser does not materially alter it's form so that it will act efficiently after
long use.
Fig. 6 indicates another form of disperser which I may use. In this example
the top of the disperser terminates in a small ball upon which the water would
strike. This form of disperser is calculated to break up the water into a larger
number of fine streams owing to the varying angles at which the water would be
deflected.
As hereinbefore stated I propose in some cases to employ a steam injector to
force water into the supply pipes for spraying apparatus used for the indicated
purposes. I have not considered it necessary to illustrate any particular description
of injector in the drawings as such apparatus might be of an ordinary description,
but in. Fig., 7 I have indicated an arrangement which I consider to be suitable. In
this fig. represents a water supply tank, m an air vessel and n an injector.
The water withdrawn from the tank or otherwise derived would be injected into
the vessel m until a suitably high pressure would be attained.
A pipe such as n¹ would connect the air vessel with the pipes connected with 'the
air propelling and humidifying apparatus.

page_text: By using a steam injector instead of a pump besides obtaining more economy in
cost of apparatus and in cost of working I obtain a supply of warm water without
the necessity for the use of a special warming apparatus.
In warm weather the use of hot or warm water might be objectionable and to
meet such objection I propose to use means for cooling the water.
For this purpose
the water may be passed through pipes outwardly exposed to cold water or cold
water may be circulated through coils or pipes in the air chamber. The apparatus
may be used to decrease the temperature of the rooms in which it is used. With
this object I propose to use ice or ice making or water cooling machines or processes
of an ordinary or suitable description to lower the temperature of the water to a
point below the temperature of the atmosphere or of the available water supply.
Such cooled water may be derived from an injector or a pump or from any suitable
and available means.
I may arrange for the injector to discharge directly into the supply piping so as
to dispense with the air vessel.
I am aware of Taylor's Specification No. 11494 of 1893, in which he claims the
use of an adjustable pin of equal diameter to the diameter of the orifice or outlet of
the nozzle, and provided with a flat upper surface with sharp edges at right angles
to the current of the flow of the water to meet the outer diameter of the jet of
water at its smallest diameter, and fixed close up to the mouth of the jet where the
velocity is the greatest, and I declare that I do not claim the use of any such pin.
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 [
claim is.
1. The casing a, b, c, of the formation as and for the purpose set forth and
indicated.
2. The casing formed or provided with corrugations or conical ledges a¹ or h
substantially as and for the purpose set forth.
3. The spraying nozzle constructed as and for the purpose set forth with reference
to Figs. 4, 5 and 6 of the attached drawings.
4. În spraying apparatus for propelling and moistening air the tubular disperser
or the globular ended disperser in combination with a nozzle discharging a jet of
water on to the end of such disperser as and for the purposes set forth.
5. In combination with a spraying nozzle the filter basket applied in the manner
and for the purpose set forth.
6. The employment of a steam injector to supply water under pressure to spraying
apparatus of the nature and used for the purposes herein set forth and indicated.
7. An injector delivering water into an air vessel connected with apparatus of
the nature and used for the purposes herein set forth.
8. Supplying water spraying apparatus of the indicated nature and use with
water artificially cooled by the means and for the purpose herein indicated.
Dated this 7th day of November 1893.
E. K. DUTTON & Co.,
5, John Dalton Street, Manchester, Agents.