Improvements in Blowing Fans.
Year: 1897

page_text: Date of Application, 27th May, 1897
Complete Specification Left, 26th Feb., 1898-Accepted, 26th Mar., 1898
PROVISIONAL SPECIFICATION.
Improvements in Blowing Fans.
We, ALBERT GANS, Manufacturer, and HEINRICH WEISS, Merchant, both of the
Firm of Gans & Co., Neugasse 3, Kemmelbach, Germany, do hereby declare the
nature of this invention to be as follows:-
For
This invention relates to fans such as are employed for directing currents of
heated or dry air over surfaces which have to be dried, and has for its object means
of distributing the air current over a large surface, varying the width of the dis-
charge opening and providing special bearings for the fan shaft and fan case.
this purpose we make the fan case with trunnions which work in parts of the axle
bearings, and we pass the axle freely through these trunnions and journal them
in the parts of the bearings beyond the trunnions. From the fan axle we drive
by reducing gear at a slow speed a crank or eccentric from which a rod extends
to a pin on the fam casing so that as the fan revolves the casing is caused to oscillato
to and fro on its axis sending the air current in various directions over a large
surface. The pin to which the crank or eccentric rod is linked, may be adjusted
nearer to or farther from the axis so that the extent of the oscillations of the casing
may be made greater or less as desired. By hinging one side of the discharge mouth
to the case and adjusting this side nearer to or farther from the fixed side, the
mouth can be narrowed or widened as desired.
Dated this 27th day of May 1897.
ABEL & IMRAY,
Agents for the Applicants.
We, ALBERT GANS, Manufacturer, and HEINRICH WEISS, Merchant, both of the
Firm of Gans & Co., Neugasse 3, Kemmelbach, Germany, 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 blowing-fans with a movable case for directing currents
of heated or dry air over surfaces which have to be dried and has for its object
means of distributing the air current over a large surface, varying the width of
the discharge-opening and providing special bearings for the fan shaft and fan
For this purpose we make the fan case with trunnions which work in parts
of the axle bearings, and we pass the axle freely through these trunnions and
journal them in the parts of the bearings beyond the trunnions. From this fan
axle we drive by reducing gear at a slow speed a crank or eccentric from which
case.
Price 8d1

page_text: a rod extends to a pin on the fan casing so that as the fan revolves the casing is
caused to oscillate to and fro on its axis sending the air-current in various direc-
tions over a large surface. The pin to which the crank or eccentric rod is linked,
may be adjusted nearer to or farther from the axis so that the extent of the oscilla-
tions of the casing may be made greater or less as desired. By hinging one side
of the discharge mouth to the case and adjusting this side nearer to or farther from
the fixed side, the mouth can be narrowed or widened as desired.
The improved fan is illustrated on the accompanying drawing in which Figure 1
is a side view and Figure 2 a front elevation, partly in section. Figures 3 and 4
shew similar views of the same construction of fan driven by chain or rope gear.
Figure 5 shews a modified construction with moveable discharge orifice.
Figures 6 and 7 illustrate to an enlarged scale in' section and front view the
device for varying the width of the discharge-opening. Figures 8 and 9 represent
details of the trunnions and bearings.
As shewn on the drawing, the fan a is provided with a casing b, having hollow
trunnions or sockets 61 61, by which the fan is mounted upon the shaft e so that
it may revolve 'independently in bearings dud: On the front side the casing b
carries a pin or bolt f to which is linked a rod g. the second end of which is
pivoted to a crank-wheel h, which latter is slowly and continually rotated from the
shaft m. By this rotation the rod g obtains a to and fro motion by means of which
the casing bis oscillated upon the shaft c.
Owing to this oscillation the discharge-nozzle, ba is made to occupy different
positions, sending the air current in various directions over a large surface. By
this means the whole of the air receives a whirling motion and the heat is uniformly
distributed, so that a rapid drying is effected.
The bolt is preferably adjustable in a slot f¹ of the casing 6 in order to effect
greater or less oscillation of the fan casing.
Instead of imparting the motion to the fan casing by means of a crank and con-
necting rod it can be actuated by means of a rope or chain as at Figures 3 and 4,
in which case, by lengthening or shortening the rope or chain (such as by hook-
ing one of the links on to the hook y) the fan may be made to distribute the air,
at a higher or a lower level.
Also, by shifting the position of the end of the chain on the disc h a greater, or
smaller extent of motion of the discharge opening can be effected. The arrange-
ment can also be such that only the discharge orifice of the fan is made moveable.
For this purpose the end parts 63 63 of the casing are mounted with hinges to the
fixed part b, and are connected together by pivoted links y. One of these links or
one of the flaps 63, is connected to the connecting rod, rope or chain that effects the
up and down motion thereof as at Fig. 5.
In order to be able to adjust at will the width of the mouth 63, the one side b³ is
hinged at m, so that it may be adjusted nearer to or farther from the fixed side by
means of screw-bolts p and nuts pl as at Figures 6 and 7.
In order to diminish the friction in the bearings of the casing and of the shaft
the trunnions or sockets 61 61 of the casing have a somewhat larger diameter than
the shaft c, so that the latter may freely pass through. The bearings dd have two bores
of different diameters; the larger one corresponds with external diameter of the
trunnions or sockets 661 while the smaller one corresponds with the diameter
of the shaft c so that all friction between trunnion 61 61 and shaft c is prevented,
even if they turn in different directions.
It is obvious that these fans may be employed not only for drying chambers, but
also for other industries, and that the details of construction may be variously
modified without departing from the nature of this invention.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, we declare that what
we claim is:--
1. In a fan the arrangement of a casing 6 mounted loose ubon the shaft c with

page_text: trunnions 6 61, which said casing 6 is adapted to receive an oscillating motion by
means of a crank and connecting rod or equivalent devices substantially as and for
the purpose
described.
2. In a fan the arrangement of the moveable casing b. with variable mouth,
formed by a hinged side b³ adjustable by means of screw bolts and nuts p; sub-
stantially as described.
3. The modified construction of the fan referred to in the First Claim, wherein
only the part of the casing constituting the discharge orifice has a reciprocating
motion imparted to it, substantially as described with reference to Figure 5 of the
drawings.
4. In a fan the combination of a fan a with a casing b adapted to receive an
oscillating motion a mouth with an adjustable side, and a bearing d constructed
with two bores of different diameter, the one corresponding with the external
diameter of the trunnion 6 of the casing and the other d corresponding with
diameter of the shaft; substantially as described.
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1
T1
1000
ABEL & IMRAY,
Agents for the Applicants.