Improvements in Fans for Ventilating Mines, Ships, Tunnels, or for analogous purposes.
Year: 1891

page_text: Date of Application, 6th May, 1891
Complete Specification Left, 6th Feb., 1892-Accepted, 19th Mar., 1892
PROVISIONAL SPECIFICATION.
Improvements in Fans for Ventilating Mines, Ships, Tunnels, or for
analogous purposes.
WILLIAM BLACK Manufacturing Engineer 1 Lovaine Place, Newcastle-on-
Tyne CHARLES EDWARD FLEMING Engineering Draughtsman 71 Elswick Road,
Newcastle-on-Tyne, do hereby declare the nature of this invention to be as
follows:-
The improvement consists in an arrangement for using two single open running
fans on the same driving shaft, or one double open running fan; with two inlets
for taking in the air, thus securing the-same-quantity of air with a more compact
& cheaper installation.
1001
COMPLETE SPECIFICATION.
Improvements in Fans for Ventilating Mines, Ships, Tunnels, or for
analogous purposes.
We WILLIAM BLACK of Lovaine Place, Newcastle-on-Tyne and CHARLES
EDWARD FLEMING of 71 Elswick Road Newcastle-on-Tyne 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:-
The improvement consists in an arrangement as hereinafter described whereby
relatively to the amount of air passed by the fan the installation is more compact
and cheaper than hitherto. According to this invention a duplex arrangement is
employed consisting either of two single open running fans or of a double open
running fan having two inlets for air as hereinafter more fully explained with
reference to the accompanying drawing.
Figures 1 and 2 are respectively a sectional elevation and a plan showing an
arrangement of compound or duplex fan consisting of two single open running
fans and
Figure 3 shows in plan an arrangement of double open running fan.
Referring to Figures 1 and 2 the two single fans A and A² constituting the
members of the duplex fan are secured to one axle B so that their inlets a a² are
opposite each other as shown clearly in Figure 2. These inlets are, when the fan
is in place mounted in proximity to openings c c² in the passage C leading from the
place from which air is to be drawn.
The air is thus drawn through the duplex openings cc² and inlets a a² and
discharged at the peripheries of each member of the duplex fan when the axle B is
rotated by any suitable motor. The bearings for the axle B are preferably placed
outside the air passage C so that they are readily accessible and are not subject to
the heat or corrosive action of gases and dust coming through the passage C. In
the arrangement Figure 3 the members A A' of the duplex fan are made in one
casing (or in casings secured together) with an inlet at each side (a a²) and a
diaphragm a extending from the axle to the periphery so as to separate the two
members of the fan. The passages by which the air is led from the place to be
exhausted or ventilated has openings in proximity to the inlets a a³ respectively
and the outlets from the said members of the fan are outside the said passages
through which the air is drawn. I have shewn the passages in dotted lines at C.
Prins d

page_text: Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed we declare that what
we claim is:-
1. A duplex fan consisting of two members on one axle with their inlets
arranged in proximity to two outlet openings from the passage leading from the
place from which the air is to be drawn as herein before described and shewn in
Figures 1 and 2 of the accompanying drawing.
2. A fan consisting of two parts each with an inlet and outlet the inlet and
outlet of the one being separated (as by the diaphragm a³) from the inlet and
outlet of the other substantially as herein before described and illustrated in
Figure 3 of the accompanying drawing.
1
1
1000
J. H. JOHNSON & Co.,
Agents.