Improvements in Dynamo-electric and Electro-dynamic Machines
Year: 1887

page_text: Date of Application, 31st May, 1887
Complete Left, 29th Feb., 1888
Complete Accepted, 31st May, 1888
1 FREDERICK GEORGE of Uley Dursley Gloucestershire Doctor of Medicine 'do
hereby declare the nature of this invention to be as follows:-
Improvements in Dynamo-electric and Electro-dynamic Machines the object of
which is to produce or employ a continuous current of electricity without the aid of
commutators. For this purpose I construct an open-coil ring-armature of one or more
coils the terminals of which I connect with the external circuit by means of
sliding conductors or collectors and I cause the armature to revolve in a magnetic
field produced by one pole only or by two or more poles of similar polarity (N. or S.)
that by the continuous cutting or crossing in the same sense of the lines of magnetic
force a continuous current in the armature coils and consequently in the external
circuit may be produced.
I further connect two such armatures together on the same spindle or otherwiso
and join their cores of iron by bars or connections of iron and employ N. pole or
poles for producing the magnetic field for one armature and S. pole or poles for that
of the other the cores forming opposite poles by induction and completing the magnetic
circuit. The core of each armature may be divided into one or more segments joined
up into rings or otherwise with similar segments of the companion armature and the
coils may be also joined up or otherwise.
I also cause the magnet or magnets to revolve instead of the coils thus dispensing
with the sliding conductors-Tho magnets being excited by a separate armature or
armatures revolving on the same spindle with them in a magnetic field produced by
one pole or poles of one sign for each armature as previously described and excited by
a coil or coils supplied by the main circuit or by any other continuous current or the
revolving magnets may be excited by coils connected directly with the main circuit
by means of sliding conductors or by any other continuous current.
The magnet or magnets may be tubular with annular pole-peices magnetised by a
coil or coils on the outside of the tube to which may be added an inside coil or
coils or they may be in the form of a disc with peripheral or annular pole-peices and
magnetised by flat helices-or they may be tubular or columnar with discoid or flange
like continuations and annular pole-peices or the magnets or pole-peices may be of any
other suitable form.
This invention is applicable to both Dynamo-electric Machines and to Electro
Motors.

page_text: COMPLETE SPECIFICATION.
Improvements in Dynamo-electric and Electro-dynamic Machines.
I, FREDERICK GEORGE of Uley Lodge Uley Gloucestershire Doctor of Medicine 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:
or cores
This Invention has for its object the production of, and in the case of Electro-
Motors the application of, a continuous current of Electricity without the aid of
commutators and I accomplish this object by means of an armature in which the core
or cores are so placed in the magnetic field that when either the armature or
magnet revolves the coil or coils on any given portion of the said core
shall cut or cross the lines of magnetic force always in the same direction or sense.
The said cores being provided with bars or conductors of iron to conduct the
magnetic lines out of the said coils and preventing their being cut in the opposite
direction or sense. There are several ways of carrying out the details of this
arrangement, I will now more particularly describe the method to which I give the
preference; I take two rings or cores of iron and I connect them together on the
same spindle or otherwise by means of bars or conductors of iron and I wind on
the said cores a quantity of copper wire in one or more coils and I connect the
terminals of the said coil or coils with the external circuit by means of sliding
conductors or collectors. I further cause the compound armature thus constructed
to revolve in a magnetic field of uniform polarity produced by opposing to one ring
or half of the armature a North pole or poles and to the other ring or half of the
armature a South pole or poles, the said rings or cores forming opposite poles by
induction and completing the magnetic circuit, and thus by the continual cutting
or crossing of the lines of magnetic force always in the same direction or sense
a continuous current in the armature coils and consequently in the external
circuit is produced without the aid of commutators. The cores may be divided into
segments and while retaining their position in the armature may be joined up by
means of the bars or conductors into rings horseshoes or other forms either with
corresponding segments of the companion core or otherwise. The coils also may be
joined up in series or parallel.
The magnet or magnets may be made to revolve instead of the armature and the
armature coils may then be connected directly with the external circuit without the
intervention of sliding conductors or collectors. The magnets may be excited by a
separate armature revolving on the same spindle with them in a magnetic field
formed by other magnets excited by current from the main circuit or other source or
the revolving magnets may be excited by coils connected with the main circuit by
means of sliding conductors, or by any continuous current or permanent magnets may
be employed.
The magnet or magnets may be tubular with annular, radial or other
pole-peices and magnetised by external and internal coils, or they may be discoid with

page_text: peripheral pole-peices & magnetised by flat helices or they may be of any
combination of these forms or the magnets or pole-peices may be of any ot
suitable form and they may be divided into bars or laminated.
My Invention is illustrated diagrammatically in the accompanying drawing in
which
Fig. 1. is an elevation of one ring or half of the compound armature the other
being removed to shew the sections of the bars or magnetic conductors.
Fig. 2, Fig. 3, Fig. 4, & Fig. 5, are plan views of the compound armature opened
out to shew the manner of connecting the two rings or cores by means of the bars or
magnetic conductors.
Fig. 3, Fig. 4 and Fig. 5, shew three methods of dividing the cores into segments
and joining them up into rings, horseshoes etc. with corresponding segments of the
companion core.
Fig. 6 is an elevation of another form of the armature in which the peripheral ring
or core carrying the coils is opposed to a magnetic pole or poles of one sign while
the inner ring may (or may not) be opposed to a pole or poles of the opposite sign to
complete the magnetic circuit, as shewn by the dotted line and letter S. The inner ring
may also be wound with coils in a similar manner to the outer ring.
Fig. 7. and Fig. 8. shew other methods of winding the armature cores.
In all the Figures the rings or cores are marked A. the bars, or magnetic
conductors B. the armature coils and the magnetic poles or pole peices N. and S
The methods of joining up the coils and of connecting them with the external circuit
are not shewn.
This Invention is applicable to both Dynamo-Electric Generators and to Electro-
Motors.
Having now particularly described and ascertained the nature of my said Invention
and in what manner the same is to be performed I declare that what I claim is
1. An armature in which the core or cores are so placed in the magnetic field that
when either the armature or magnet revolves the coil or coils on any given portion of
the said core or cores shall be opposed to a pole or poles of one sign only at any
point or points of its revolution and shall cut or cross the lines of magnetic force
always in the same direction or sense the said cores being provided with bars
or conductors of iron to conduct the magnetic lines out of the said coils.
2. An armature consisting of two rings or cores of iron connected together by bars
or magnetic conductors as previously described, the said rings or cores being wound
with coils of insulated copper wire or other conductor and so placed in the magnetic
field that when either the armature or magnet revolves the said coils or conductor
shall cut or cross the lines of magnetic force always in the same direction or sense.
3. Dividing the rings or cores into segments and joining the segments up into
rings or other forms either with corresponding segments of the companion ring or
core or otherwise by means of the bars or connections before mentioned.
4. Revolving magnets magnetised by armature revolving with them on the same
spindle.
5. Tubular magnets having annular radial or other pole-peices and magnetised by
external & internal coils.
6. Discoid magnets having peripheral pole-peices and magnetised by flat helices.
All substantially as described and for the purpose set forth.