Improvements in Apparatus Designed for use in connection with Variable Electric Currents, the said Improvements being also Applicable to Alternate Current Motors.
Year: 1888

page_text: Date of Application, 20th Nov., 1888
Complete Specification Left, 20th Aug., 1889-Accepted, 20th Dec., 1889
PROVISIONAL SPECIFICATION.
Improvements in Apparatus Designed for use in connection with
Variable Electric Currents, the said Improvements being also
Applicable to Alternate Current Motors.
We, WALTER THOMAS GOOLDEN, LLEWELYN BIRCHALL ATKINSON, and SYDNEY
CHARLES GILBEY GOLD, of 2 Victoria Mansions, Westminster, in the county of
Middlesex, and Bull Green Works, Halifax, Yorkshire, Electrical Engineers, do
hereby declare the nature of this invention to be as follows:-
This invention relates to improvements in the construction of apparatus which,
consisting of combined electric and magnetic circuits, is adapted to the transformation
of electric currents, and has for its object the provision of means which will allow
of the position of the magnetic circuit, or circuits, being varied relatively to that of
the electric circuit, or circuits.
In apparatus of this type as at present constructed the relative position of the
primary and secondary electric circuits and the magnetic circuits is fixed, whereas in
constructing apparatus in accordance with this our invention it is made to consist of
one, or more, primary and secondary electric circuits having a variable magnetic
circuit, or circuits, so that the primary circuit, or circuits, being closed on the source
of current, and the secondary circuit, or circuits, being closed through lamps, or other
current absorbing circuits, it is possible without opening or closing any circuits to
produce currents in any of the secondary circuits as required, by varying the position
of the magnetic circuit so as to divert the lines of force from any secondary circuit,
or circuits, in which current is not required to any other circuit, or circuits, in which
current is required.
One convenient method of carrying this part of our invention into effect would be
to dispose the iron core pieces on which the generating portions of the secondary
circuits are wound about the periphery of a circular base, the primary circuit being
wound on an iron core so mounted as to be capable of rotation about the centre of the
base. By this means the primary circuit may be caused to exert its magnetic
influence on the core of any one or other of the secondary circuits as desired.
By the application of the principle of our invention it is possible to construct
apparatus fulfilling for variable currents the functions of switches, commutators, or
circuit distributors. Thus electro motors or generators for use with variable currents
may be constructed without any commutators or collectors but having in place
thereof transformers whose magnetic circuits are variable thus distributing the electric
currents as they are required to produce motive power.
These transformers are not necessarily separate apparatus but may form an integral
part of the machine, thus laminated armatures can be used in which tach coil is
alternately a generator coil and motor coil, and two such armatures in combination
may be used, each rotating in a separate, laminated, magnetic field, and in order to
correct the phase of the induced currents, one inagnetic field may be excited by a
secondary current, instead of direct from the primary, or the coils on the armature
may themselves be corrected through a rotating transformer whereby the current
phases are rectified.
D: 10th of Novembar 1800
F. SEATON SNOWDON,
Agent for the Applicants.

page_text: COMPLETE SPECIFICATION.
Improvements in Apparatus Designed for use in connection with
Variable Electric Currents, the said Improvements being also
Applicable to Alternate Current Motors.
We WALTER THOMAS GOOLDEN, LLEWELYN BIROHALL ATKINSON, & SYDNEY
(HARLES GILBEY GOLD, of Woodfield Road, Harrow Road (late of 2 Victoria
Mansions Westminster) London, Electrical Engineers, 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 improvements in the construction of apparatus, which,
consisting of combined electric & magnetic circuits, is adapted to the transformation
of electric currents, and has for its object the provision of means which will allow
of the position of the magnetic circuit or circuits being varied relatively to that of the
electric circuit or circuits. In apparatus of this description, as at present constructed,
the relative position of the primary & secondary electric circuits and the magnetic
circuits is fixed, whereas in constructing apparatus in accordance with this our
invention it is made to consist of one or more primary and secondary electric circuits
having a variable magnetic circuit, or circuits, so that the primary circuit, or circuits,
being closed on the source of current, and the secondary circuit, or circuits, being
closed through lamps or other current-absorbing circuits, it is possible without
opening or closing any circuit, to produce currents in any of the secondary circuits
as required, by varying the position of the magnetic circuit so as to divert the lines
of force for any secondary circuit, or circuits, in which current is not required, to
any other circuit, or circuits, in which current is required.
Fig. 1 shows one method of carrying this part of our invention into effect. The
secondary coils 5. S₁ 2 8 are wound on a laminated core with internal teeth.
The primary coil p is wound on a laminated core with external teeth. By means
of the handle the primary organ can be brought into correspondence with any or
none of the secondary organs, and the primary being closed on the source of
alternating current, the secondary being closed on lamps, or other current-consumers.
the secondary current is produced in any circuit as desired. Fig. 1a shows a similar
arrangement where 2 connecting cores complete the magnetic circuits of primary &
secondary coils.
Fig. 2 shows another arrangement for producing similar results. A laminated
armature of circular form is wound with two (or more) secondary circuits closed on
lamps or other devices, these circuits being in different planes.
This armature is surrounded by a primary circuit closed on the source of alternating
supply, and the armature & coil are inserted in the laminated field piece "f."
As shewn in fig. 2 there is one coil in the same plane as the primary coil, and
in this coil a current will be induced. The second coil at right angles to this will
have no current induced in it, but by turning round the armature inside the field
pieces the current in these 2 coils may be varied.
By the application of the principle of our invention it is possible to construct
apparatus fulfilling, for variable currents, the functions of switches, commutators or
circuit distributors. Thus electro-motors or generators for use with alternating or
variable currents may be constructed without any commutators or collectors but
having in place thereof Transformers whose magnetic circuits are variable, thus
distributing the electric currents as they are required to produce motive power.
Figs. 3 & 4. show one such form of motor, which consists of two parts, the trans-
former part fig. 3, whose magnetic circuit relatively to the coil is variable, and the
motor part fig. 4. Each is similar in construction, consisting of a field system of
laminated plates with side coils as in figs. 3 & 4, or with one coil as fig. 2.
Each has a laminated armature wound with a series of separate coils, preferably
in notches so as to diminish the magnetic resistance. The two armatures are on one
shaft and the coils on the armature of fig. 3 are connected to the coils on fig. 4 in

page_text: pairs, the coil on the axis a. b. to the coil on the axis c. d. and so on.
The primary
coils of fig. 3 being connected to the source of alternating E. M. F. induced currents
are produced in the coils of the armature fig. 3 producing a magnetic force opposing
that due to the primary current & symmetrical about a. b., this having no rotatory
effort. These currents, however, passing in the coils fig. 4 produce a resultant
magnetic axis on c. d. which tends to move to c. d. and thus a rotation is set up.
Coils may be wound on the field system of fig. 4 which are connected to secondary
coils on the fixed field system of fig. 3 in which case the armature coils of fig. 3 are
connected to those of fig. 4, so that a. b. is connected to c, d₂. The resultant field
due to the field & armature coils of fig. 4 will still be at c. d. and a rotatory effort
results.
Under certain circumstances the field coil of fig. 4 may be connected direct to the
primary alternating source.
Other combinations of this kind can be arranged but the distinctive feature is the
production of a current in moveable transformer coils themselves, having no rotatory
effort, the currents being symmetrical about the magnetic axis, not symmetrical in a
magnetic system when a rotatory effort is produced.
Having now particularly ascertained the nature of the aforesaid invention, and
in what manner the same is to be performed, we declare that what we claim is
as follows:-
1. The construction of Transformers for use with variable or alternating electric
currents with one or more primary and secondary circuits with a moveable magnetic
circuit, or circuits, so arranged as to vary or regulate the current in any secondary
cirenit, by the position of the magnetic circuit, relatively to the coils, not however by
altering the magnetic resistance of the circuit.
2. The construction of current or pressure Regulators, Circuit distributors, and other
devices by the use of Transformers with moveable magnetic circuits.
3. The construction of motors, or motor generators for use with alternating
currents, such motors having as one of their features a distributing Transformer as set
forth.
4. The Distributors, Circuit regulator, and Motor described, and illustrated by
figs. 1. 1a. 2. 3. & 4.
DL 1
501
WALTER T. GOOLDEN,
LLEWELYN B. ATKINSON,
SYDNEY C. G. GOLD,
Applicants.