Improvements in Fans Operated by Electricity.
Year: 1892

page_text: Date of Application, 24th May, 1892
Complete Specification Left, 24th Feb., 1893-Accepted, 1st Apr., 1893
.
PROVISIONAL SPECIFICATION.
Improvements in Fans Operated by Electricity.
We JAMES HENRY PICKUP of Walmersley Road, Bury, in the County of.
Lancaster, Engineer, and JAMES BYROM of Woolfold, Bury, aforesaid, Contractor
and JAMES ASHWORTH, Draughtsman, in the employ of J. H. Pickup and
Company Limited of Bury aforesaid Engineers do hereby declare the nature of
this invention to be as follows:-
The object of this invention is to provide a simple, and efficient, fan operated by
electricity, so that it can be conveniently used in situations where ordinary
mechanical power is not available.
According to this invention the field magnets are constituted by a ring which
has pole pieces extending as lips for a considerable distance around the armature
which is contained within the said field magnets. The said armature is also of
ring form so as to leave a large passage for air through it. The armature is
mounted upon a shaft the bearings of which may be carried by a framing con-
nected to the ring carrying the field magnets, or by a framing otherwise supported.
The blades of the fan are connected to the shaft at some distance from the armature-
and either inside, or outside, the framing. The armature and field are wound with
wires which carry a continuous current from any suitable generator. The windings
of the armature are preferably between a large number of pole pieces, a number of
these pole pieces being opposite the pole pieces of the field magnets in whatever
position the armature may come. to rest and so the armature will start at any time
on the current being put on and requires no starting by hand. The arrangement
of the armature being independent of the fan blades enables the arrangement to
be applied to fans, already existing, and the armature to be wound with greater
facility than would be the case if the armature were connected to, or formed part
of, the fan itself. The commutator may be secured to the shaft in any suitable
position and as the current employed is a continuous one there is no sparking at
the commutator.
Dated this 24th day of May 1900
.
J. H. JOHNSON & Co.,
47, Lincoln's Inn Fields, London, W.C., Agents.
COMPLETE SPECIFICATION.
Improvements in Fans Operated by Electricity.
We JAMES HENRY PICKUP of Walmersley Road Bury in the County of
Lancaster Engineer JAMES BYROM of Woolfold Bury aforesaid Contractor and
JAMES ASHWORTH, Draughtsman in the employ of J. H. Pickup & Company
Limited of Bury aforesaid Engineers do hereby declare the nature of this inven
tion and in what manner the same is to be performed to be particularly described
and ascertained in and by the following statement :-
The object of this invention is to provide a simple, and efficient fan operated
by electricity so that it can be conveniently used in situations where ordinary
mechanical power is not available.
The accompanying drawing represents a fat constructed to be operated by
electricity according to this invention Figures 1 and 2 being elevations at right
angles to each other.
According to this invention the field magnets are constituted by a ring A of
cast or wrought iron laminated or not which has two or more pole pieces a a
Γ'.

page_text: ::
extending as lips for a considerable distance around the armature B which is con-
tained within the said field magnets. The said armature B is also of ring form so
as to leave a large passage for air through it. The armature B is mounted by a
"spider" with any suitable number of arms upon a shaft C the bearings d of which
may be carried by a framing D connected to the ring A carrying the field magnets,
or by a framing otherwise supported. The blades E of the fan are connected
to the shaft C at some distance from the armature B, and either inside, or outside
the framing. The said blades E are entirely separate from the armature and are
supported on the shaft independently thereof. The armature may be made of cast
or wrought iron laminated or not. The armature B and field magnet ring are
wound with wires which carry a continuous current from any suitable generator
such as a dynamo, secondary battery, or primary battery to the terminals of which
the windings of the field are attached. The windings of the armature B are pre-
ferably between a large number of pole pieces 6 a number of these pole pieces b
being opposite the pole pieces a of the field magnets in whatever position the
armature B may come to rest and so the armature will start at any time on
the current being put on and requires no starting by hand. The windings of
the armature ring are brought to the commutator F to the brushes ff of which the
wires of the field are connected the said brushes being secured to arms on a
rocker (not shewn in the drawing) which may be mounted on the shaft. The
armature B being independent of the fan blades E enables the arrangement to be
applied to fans already existing, and the armature to be wound with greater
facility than would be the case if the armature were connected to, or formed part
of, the fan itself.
The commutator F may be secured to the shaft C in any suitable position
and as the current employed is a continuous one, there is no sparking at the
commutator.
The electric current enters the fan by the insulated terminal a² and passes
through the first field coil of insulated wire at the left hand side of Figure 1 thus
forming north and south poles at the pole pieces; it then passes from the end of
the first coil to the brush and to the commutator F and thence to the armature
coils splitting and traversing each half of the coils and forming north and south
poles in or about the space O and X. Attraction and repulsion then take place
the poles of the field attracting and repelling the poles of the armature whilst the
brushes are on the commutator strips immediately in connection with the coils of
the armature in the spaces O and X. The current is therefore continuous in the
machine the commutator and brushes acting as conveyors of the current to and
from the armature. The current passes from the armature through the brush f
to the coil on the right hand side of the field magnet ring which is wound in such
a manner as to intensify the north and south poles formed when the current enters
the first field coil. The current leaves by the insulated terminal a³.
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 :-
A fan operated by electricity and arranged or constructed substantially as
herein before described and illustrated by the accompanying drawing.
1000
J. H. JOHNSON & Co.,
47, Lincoln's Inn Fields, W.C., Agents.