Automatic Apparatus for Compensating Variations of Ourrent in Electric Conductors.
Year: 1890

page_text: Date of Application, 11th Mar., 1890
Complete Specification Left, 1st Dec., 1890-Accepted, 10th Jan., 1891
PROVISIONAL SPECIFICATION.
[Communicated from abroad by ALFRED MILLS TAYLOR, at present in Baroda, India,
Electrical Engineer.]
Automatic Apparatus for Compensating Variations of Ourrent in
Electric Conductors.
We SIEMENS BROTHERS & Co. LIMITED of 12 Queen Anne's Gate, Westminster in
the County of Middlesex, Electrical Engineers, do hereby declare the nature of this
invention to be as follows:-
When from a central station, where electricity is generated, a number of main
conductors proceed to different places, to supply lamps or other apparatus consuming
electricity, it is often desirable to supply all these main conductors from a single
source, which may be a dynamo or a number of dynamos working together, each
main being supplied with a current having electro-motive force suited to the work
which it has to do. When the work performed by the current conveyed by any of
the mains undergoes variation, this variation in the current necessarily affects the
currents in the other mains, altering their electro-motive force. In such cases it is
usual to apply, generally by hand, means of regulating the electro-motive force of
the separate currents so as to compensate for the variation in some of them caused
by variation in others of them.
This invention relates to apparatus for automatically compensating such variations
in a number of conductors supplied from one source, the apparatus being such that,
when it is once properly adjusted to the different conditions of the several conductors,
it remains permanently capable of so modifying the electro motive force in each
conductor, when variations occur in the current conveyed by some of their number,
that the electro-motive force in all can be simultaneously regulated. The apparatus
for this purpose consists of a ring of soft iron, preferably made up of wire or lamina
having wound on it several convolutions of each of the conductors to be compensated,
the convolutions belonging to the several conductors, occupying different parts of the
circumference of the ring. Those of the conductors which have to convey electricity
farthest have the fewest convolutions, and the others have the number of their
convolutions properly proportioned according to their conditions, those which have
the least resistance in their course having the greatest number of convolutions. As
the currents pass through these coils, the ring is converted into a closed magnet
offering a back electro-motive force to the current in each conductor. When the
current in any of them is increased or diminished the magnet ring is rendered more
or less powerful in offering back electro-motive force, thus causing passage of more
or less current in all of them, whereupon, by altering the speed of the dynamos or
the number of them in action, the general supply from the source of electricity can
be proportionally increased or diminished, without affecting one conductor more than
another.
Doted this 11th dow of March 1800
ABEL & IMRAY.
Agents for the Applicants.

page_text: COMPLETE SPECIFICATION.
Automatic Apparatus for Compensating Variations of Current in
Electric Conductors.
We, SIEMENS BROTHERS & CO. LIMITED, of 12 Queen Anne's Gate, Westminster,
in the County of Middlesex, 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 :-
When from a central station, where electricity is generated, a number of main
conductors proceed to different places to supply lamps or other apparatus consuming
electricity, it is often desirable to supply all these main conductors from a single
source, which may be a dynamo or a number of dynamos working together, each
main being supplied with a current having electro motive force suited to the work
which it has to do. When the work performed by the current conveyed by any of
the mains undergoes variation, this variation in the current necessarily affects the
currents in the other mains, altering their electro motive force. In such cases it is
usual to apply, generally by hand, means of regulating the electro-motive force of
the separate currents so as to compensate for the variation in some of them caused
by variation in others of them.
This invention relates to apparatus for automatically compensating such variations
in a number of conductors supplied from one source, the apparatus being such that,
when it is once properly adjusted to the different conditions of the several conductors,
it remains permanently capable of so modifying the electro motive force in each
conductor, when variations occur in the current conveyed-by-some of their-number,
that the electro-motive force in all can be simultaneously regulated.
The apparatus for this purpose is shown diagrammatically by the accompanying
drawing.
It consists of a ring A of soft iron, preferably made up of wire or laminæ, having
wound on it several convolutions of each of the conductors L' L' &c. to be compensated,
the convolutions belonging to the several conductors, occupying different parts of the
circumference of the ring.
Those of the conductors which have to convey electricity farthest such as L' L³
have the fewest convolutions, and the others have the number of their convolutions
properly proportioned according to their conditions, those which have the least
resistance in their course, as for instance L', having the greatest number of
convolutions.
As the currents pass through these coils, the ring A is converted into a closed
magnet offering a back electro motive force to the current in each conductor. When
the current in any of them is increased or diminished the magnet, ring is rendered
more or less powerful in offering back electro-motive force, thus causing passage of
less or more current in all of them, whereupon, by altering the speed of the dynamos
or the number of them in action, the general supply from the source of electricity can
be proportionally increased or diminished, without affecting one conductor more than
another.
Having now particnlarly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :-
For automatically compensating variations of current in a number of electric
conductors fed from the same source, a soft iron ring having wound on it separate
coils forming parts of the several conductors, each having the numbers of its con-
volutions suitably proportioned, substantially as herein described.
Dated this 1st day of December 1800