Year: 1886

page_text: Date of Application, 15th-Nov., 1886.
Complete Left, 15th Aug., 1887
Complete Accepted, 18th Oct., 1887
1, GEORGE WILLIAM WADE, of Hornsea House, Hornsea, in the County of York,
Engineer, do hereby declare the nature of this invention to be as follows:-
My invention relates to an improved construction of blast or exhaust fan for moving
and propelling volumes of air, and of delivering them at a high velocity.
In carrying the invention into effect, I mount a screw in a suitable chamber in
point of sectional area, within which it can be rotated at a suitable speed.
I do not confine myself to any particular shape or pitch of screw. I may, according
to my invention, make it continuous or interrupted, and consisting of spirals or of
pitched blades, single or compound, and it may be enclosed in a case revolving
with it.
The chamber in which the screw is rotated is fitted with one or more suction and
discharge pipes suitably connected with it, and with end covers to allow of the easy
insertion or removal of the screw.
I mount upon the screw shaft, and in the same plane as the discharge, a series of
blades, or heaters, preferably continuous with the respective threads of the screw, and
form a suitable chamber in which those blades can rotate.
I do not confine myself to placing the scrow above described in any particulur
plane.
PHILLIPS & LEIGH,
Agents for the Applicant.

page_text: I, GEORGE WILLiam Wade, of Hornsea House, Hornsea, in the County of York,
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 :-
My invention relates to an improved construction of blast or exhaust fan for moving
and propelling volumes of air, and delivering them at a high velocity.
In carrying my invention into effect, I mount one or two screws upon a shaft.
rotated at a suitable speed within a chamber of suitable cross section to which the air
is admitted in any convenient way.
In combination with the screw or screws on the shaft, I use a fan placed, preferably,
under the delivery, and which receives the air from the screw or screws.
I do not confine myself to the use of a single screw, as I may use one on each side
of the fan; and the screws may be furnished with more than one thread.
In order that my invention and the means by which the same is to be carried into
practical effect may be thoroughly understood, I will now describe the same in detail,
referring in so doing to the accompanying sheet of drawings which are to be taken as
part of the specification and read therewith.
Figure 1 is a sectional elevation of a fan with single-thread right-and-left-handed
Borew.
Figure 2 is a transverse section of the same.
Figure 3 is a sectional elevation taken on the line Y-Z of Figure 2.
Figure 4 is a sectional elevation of a double-screw fan, each screw having two
threads.
A is the case of the fan; and B, the shaft running in bearings of a suitable length
formed in the case of the fan.
The air is admitted to the case through openings formed therein of the fan at any
suitable point.
C is a boss on the shaft, on which are formed two screws, D and D¹; the former
left-handed, and the latter right-handed.
These screws revolve in channels, E, of a corresponding sectional area, and set a
parallel with the shaft B.
Between the screws when there are two, or at the side of the screw when there is
only one, is fixed upon the shaft B a fan F, in the sides, f, of which openings, f", of a
proper area are formed to admit of the passage of the air to the fan.
G is the delivery, set at any convenient angle with the horizontal plane passing a
through the shaft B. It is placed in the same plane as the fan F which can then
deliver the blast directly thereinto.
I do not confine myself to the use of two screws, one on each side of the fan,
inasmuch as only one may be used and the fan may be closed on the opposite side.

page_text: The screws may also be single, double, or treble-threaded, according to the special
requirements of the particular case for which the fan is being constructed.
Fig. 5 is a sectional side elevation; and Fig. 6 is a transverse elevation partly in
section, the former taken on the line W-X of the latter, illustrating a modified form
of the case A of the fan, according to which the air is drawn into the case through
openings, a, formed in the ends of the channels E. The delivery, G, is beneath the
fan, instead of above it. The relative positions of the openings for the air-supply and
delivery may be varied as may be required by the special requirements of the
particular case to which the invention is to be applied.
In the two lust mentioned figures, the case A is formed eccentrically to the fan, the
eccentricity increasing towards the delivery. I do not confine myself to making
the case eccentric or concentric to the fun, as I may make it either way, as may be
desirable.
The description already given of my improved combination fun and screws with
reference to Figs. 1 to 4 applies equally to Figs. 5 and 6.
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. In a blast or exhaust fan; the combination of fan-wheel, having openings in its
sides, with a pair of screws, right-and-left-handed, upon the shaft of the fan, receiving
and delivering the air-currents into the fan; substantially as described with reference
to the accompanying Figures 1 and 2.
2. In a blast or exhaust fan; the combination of fan-wheel having openings in its
side, with a screw upon the fan shaft, receiving and delivering an air current to the
fan; substantially as described with reference to the accompanying figures.
3. The combination of fan-wheel with multiple throaded screw or screws mounted
on the same shaft, and receiving and delivering air currents into the said fan through
openings in the side or sides thereof; substantially as described with reference to the
accompanying figures.