Improvements in Centrifugal Fans or Blowers.
Year: 1895

page_text: This Print is in accordance with the original Specification as it stands after
Amendment (under Section 11 of the Patents, &c. Act, 1883), as required by
the decision of the Comptroller General of the 2nd day of June 1896.
Date of Application, 21st Feb., 1895
Complate Specification Loft 04ot Nov 1005 Accented
21st Dec
1805
Date of Application, 21st Feb., 1895
Complete Specification Left, 21st Nov., 1905
005 Accepted,
21st Dec
1805
PROVISIONAL SPECIFICATION.
Improvements in Centrifugal Fans or Blowers.
I, GEORGE AUGUSTUS MOWER, of 75 Queen Victoria Street, in the City of
London, Engineer, do hereby declare the nature of this invention to be
follows:-
:-
as
My invention relates to improvements in the description of centrifugal fans or
blowers, invented by James Higginbottom for which invention a Patent No. 24070
of 1894 has been granted to him, and is chiefly designed to provide improved
means for supplying both hot and cold air as required to wheat-drying and con-
ditioning machines and the like. My improved apparatus is, however, also useful
in connection with other apparatus in which a supply of both hot and cold air is
required.
For this purpose I provide a compound fan or blower comprising a casing divided
by a non-conducting partition into two chambers or compartments in which are
arranged two fans having their vanes, by preference, mounted on and driven by
the same shaft, which passes through the two vortex-chambers. The partition
between these vortex-chambers is imperforate except with respect to the aperture
in which the shaft works. This aperture is made of such size as to prevent the
transfer of the hot or warm air to the cold air chamber and vice versa, the partition
being so arranged as to prevent inter-communication between the adjacent vortex-
chambers. I make the partition separating the vortex-chambers of a material
which does not readily conduct heat, or I form the said partition by interposing a
layer of non-conducting material between two plates of metal or other suitable
material.
The inlet-apertures for the hot and cold air are preferably arranged on the outer
sides of the casing, the outlet-apertures being arranged tangentially to the fan-
wheels in the usual manner.
It is advantageous, in most cases, to make the vanes and vortex-chamber of the
hot-air fan of greater width than those of the cold-air fan. If desired, however,
they may be of equal width, the partition, in this case, being arranged in the centre
of the casing.
It is obvious that 1 can vary the relative sizes of the fans or make their vanes,
vortex-chambers or other parts of any desired form or of any suitable materials
having regard to the objects in view, without departing from the nature of my
said invention.

page_text: Improvements in Centrifugal Fans or Blowers.
I, GEORGE AUGUSTUS MOWER, of 75 Queen Victoria Street, in the City of
London, 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 improvements in centrifugal fans or blowers, and is
chiefly designed to provide improved means for supplying both hot and cold air as
required to wheat-drying and conditioning machines and the like. My improved
apparatus is, however, also useful in connection with other apparatus in which a
supply of both hot and cold air is required.
For this purpose I provide a compound fan or blower comprising a casing divided
by a non-conducting partition into two chambers or compartments in which are
arranged two fans having their vanes, by preference, mounted on and driven by
the same shaft, which passes through the two vortex-chambers. The partition
between these vortex-chambers is imperforate except with respect to the aperture
in which the shaft works. This aperture is made of such size as to permit. the
shaft to rotate freely therein whilst preventing the transfer of the hot or warm air
to the cold air chamber and vice versa, the partition, moreover, being otherwise so
arranged as to prevent inter-communication between the adjacent vortex-chambers.
I make the partition separating the vortex-chambers wholly of a material which
does not readily conduct heat, or form the said partition by interposing a layer
of non-conducting material between two plates of metal or other suitable material.
The inlet-apertures for the hot and cold air are preferably arranged on the outer
sides of the casing, the outlet-apertures being arranged tangentially to the fan-
wheels in the usual manner.
In the accompanying drawing I have shown how my said invention may be
conveniently and advantageously carried into practice.
Figure 1 is a vertical longitudinal section, and
Figure 2 a plan, showing one form of my improved centrifugal fan or blower.
A is the casing of the fan, which casing is divided into two vortex-chambers by
a partition consisting of two plates B, B of sheet-iron or other suitable material
with an interposed layer of asbestos, slag-wool or other suitable material which
is a non-conductor or a bad conductor of heat, the said plates being rivetted in
position by means of angle-iron rings D or by brackets or in any other suitable
manner. The said partition is provided with a central aperture E through which
extends the spindle or shaft F. The latter is provided with a driving pulley Fl
and with two fan-wheels or sets of vanes G, G¹. The vortex-chambers H, H are
provided with inlet-apertures J, J' and with tangential outlets K, K¹, the inlet-
aperture J for the vortex-chamber H' being provided with a seating for the
reception of the pipe or trunk for supplying the hot-air.
It is advantageous, in most cases, to make the vanes' G and vortex-chamber H¹
of the hot-air fan of greater width than the vanes G and vortex-chamber Hof
the cold-air fan, as shown. If desired, however, they may be of equal width, the
partition, in this case being arranged in the centre of the casing A.
It is obvious that I can vary the relative sizes of the fans or make their vanes,
the vortex-chambers or other parts of any other desired form and of any suitable
materials having regard to the objects in view, without departing from the nature
of my said invention.

page_text: Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, 1 declare that what I
claim is :-
A compound fan or blower constructed substantially as hereinbefore described
and for the purposes specified.
Th 011
GEO. A. MOWER..
D. Young & Co.,
11 & 12 Southampton Buildings, London, W.C.,
Agents for the Applicant.
GEO. A. MOWER..
D. Young & Co.,
11 & 12 Southampton Buildings, London, W.C.,
Agents for the Applicant.