Improvements in Blowing or Ventilating Fans.
Year: 1899

page_text: Date of Application, 30th Aug., 1899-Accepted, 21st Oct., 1899
COMPLETE SPECIFICATION.
Improvements in Blowing or Ventilating Fans.
I, ALBERT GANS, Managing Director of the Firm of Gans & Co., of Urfahr-
Linz, in the Empire of Austria, Manufacturer, 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 improvements in blowing fans of the class described
in British Patent No. 13108, dated May 27th 1897, and granted to Albert Gans
and Heinrich Weiss, said fans having a casing which is moveable independently
of the fan axle in such manner that currents of air can be directed and distri-
buted over large surfaces.
The present improvement consists essentially in a modified construction of
the said class of blowing fans, in which the whole casing is not moveable, but
the discharge orifice or nozzle only is made capable of receiving an oscillating
or turning motion upon or within a stationary casing or on suitably arranged
hinges, and furthermore in a specially arranged system of bearings for the fan
shaft and the casing, contrived for the purpose of reducing friction between
moving parts to the lowest possible minimum and to admit of easily and expedi-
tiously taking out the fan shaft without dismounting the whole of the apparatus.
In the drawings hereto attached the aforesaid improvements are illustrated:
Figure 1 is a vertical section.
Figure 2 a front elevation partly in section, and
Figure 3, an end view of the blowing fan or ventilator in which only the part
of the casing carrying the discharge opening or nozzle is moveable.
Figure 4 shows a modified form of construction with moveable nozzle, and
Figure 5, a further form of construction (partly in section).
Figure 6 is a side view of a modified driving gear for the moveable portion
of the fan casing.
Figures 7 and 8 illustrate respectively in longitudinal and in cross-section
the improved system of bearings.
As shown in the drawings, Figures 1, 2 and 3, the fan casing b, may be so
arranged that the part 6 of the casing in which is the discharge orifice is
made moveable, while the casing proper (b) is made stationary and rests in
bearings or is supported by brackets or in other suitable manner. The
parts 64, 64 carrying the mouth or nozzle 6 are made concentric and closely
fitting to the outer or inner surface of the stationary casing b. The aperture e in
the latter must be so determined, as to size, that, upon turning the moveable
portion, the opening of the mouth 63 is in no way narrowed or covered
up.
It is of no consequence whether the blowing fan is given a vertical or hori-
zontal position, or what contrivance is employed for creating the air current,
whether an ordinary fan, as shown in Figures 1, 2 and 3, or a ventilator or
exhauster, as shown in Figure 4, or whether it has only one discharge orifice
or two or more nozzles 62, as illustrated in Figure 4.
Instead of providing the discharge nozzle 6 with guide pieces b* fitting the

page_text: casing b, the arrangement can also be so chosen that the sides of the dis-
charge nozzle are made turnable on hinges m and close against the front wall
of the stationary casing. The said moveable nozzle parts 63, 6 are connected
with each other by link lever p, or in other convenient manner, so that when
operated, both parts will be moved simultaneously. In this case the width of
the discharge orifice will undergo certain unimportant alterations and the air
current will be deflected by said nozzle parts.
The moveable part of the fan casing may be operated by an eccentric h and
connecting rod g, or by other convenient means, or the gear hereinafter described
and especially intended for operating several blowing or ventilating fans simul-
taneously may be employed.
Instead of a connecting rod, a cord, rope or chain t is provided and secured
by one end to the eccentric or crank-wheel h and by the other end to the upper
part of the discharge nozzle 6ª, passing over suitably arranged pulleys i. In case
several fans are to be operated simultaneously, the cord or rope is to be divided
into as many branches as there are fans and each branch is connected to one
fan, so that upon revolving the crank-wheel h, the discharge nozzles 6ª of all
the fans forming the train are synchronously displaced.
In order to admit of adjusting the extent of the stroke, the attachment u holding
the end of the rope or cord t to crank-wheel h may be made radially moveable,
and for the purpose of allowing the mean direction of the air current to be
altered the opposite end of the rope or cord h may have a short chain v con-
nected to nozzle 63 by means of a hook so that by lengthening to shortening
the chain the mean position of the discharge nozzle may be adjusted, and in case
of several fans being operated together, the air currents of the various fans may
be distributed over different levels.
With a view to obviating the necessity of dismounting the whole apparatus
in case the fan shaft c has to be removed, the casing bis made in two parts (see
Figure 1) which can be securely connected by angle irons and screw-bolts.
The trunnions 61, which support the fan casing in bearings d and through
which freely passes fan shaft c, have radial slots or cuttings n corresponding
in width with the diameter of the bore, so that fan shaft c can be passed through
such slits or cuttings in order to be placed in its bearings. When the fan
shaft c is to be taken out, it is sufficient to unscrew and remove the upper portion
of casing 6 and dismount the caps of the bearings; the shaft c with fans a can
then be freely lifted out of its bearings through the slots or cuttings w.
In blowing apparatus in which only the part carrying the discharge nozzle
is moveable while the stationary portion b of the casing is secured to brackets,
bearings with two bores of different diameters may be employed as described in
Specification 13108/97. If however the stationary portion of the casing is also
to be supported in the bearings, the latter must have three bores, as shown in
Figures and 8. The bore is made to correspond to the diameter of fan
shaft c, bore to the external diameter of trunnions 6¹, and bore d³ to the
external diameter of bearing sockets 65 of the moveable portion 63, 64 of the fan
casing. The bores of trunnions b¹ and sockets must be made sufficiently large
to give some play to shaft c and trunnions 6 respectively and admit of their
touching only in their proper bearings with as little friction as possible.
The trunnions 61 and sockets are also provided with radial slots or cut-
tings w, to corresponding in width to the diameter of their inner bores, in order
to admit of readily dismounting and removing fan shaft c, without dismounting
the apparatus.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what I
claim is:
I
1. An improved construction of a blowing or ventilating fan, consisting in a

page_text: of oscillating on or within the fixed or stationary casing, or turnable on hinges
or the like, substantially as set forth and shown in the drawings.
2. The modified form of the improved construction of blowing or ventilating
fan as claimed under 1, in which only the sides of the discharge nozzle or mouth
hinged to the casing or nozzle parts are moveable in such manner that a link
lever effects the simultaneous and analogous movement of both sides of the
mouth piece, substantially as described and shown in the drawings.
3. In blowing or ventilating fans as claimed under 1, a bearing having three
bores, one of which corresponds to the diameter of the fan shaft, the others
respectively to the external diameter of the trunnions and bearing sockets, sub-
stantially as and for the purpose described and illustrated in Figures 7 & 8 of
the accompanying drawings.
4. In bearings for blowing or ventilating fans as claimed under 3, trunnions
and bearing sockets having radial slots or cuttings of the same width as the
diameter of their inner bores to facilitate removal of the fan shaft, substantially
as described and illustrated in the accompanying drawings.
Dated this 30th dox of Anonst 1899
PHILLIPS & LEIGH,
No. 22, Southampton Buildings, Chancery Lane, W.C.,
Agents for the Applicant.