IMPROVEMENTS IN APPARATUS FOR THE GENERATION AND UTILIZATION OF ELECTRIC CURRENTS
Year: 1883

page_text: PROVISIONAL SPECIFICATION left by Sebastian Ziani de Ferranti at the
Office of the Commissioners of Patents on the 2nd January 1883.
SEBASTIAN ZIANI DE FERRANTI of Richmond Gardens, Shepherds Bush in the
County of Middlesex Electrician "IMPROVEMENTS IN APPARATUS FOR THE
GENERATION AND UTILIZATION OF ELECTRIC CURRENTS "
This Invention has for its object improvements in apparatus for the generation
and utilization of electric currents.
It is well known that a continuous current flowing through a conductor will
cause an alternating current to be generated in a conductor approaching and
receding from it-and dynamo machines are made whose electro magnets are fed
by a continuous current and whose armature as its position is altered in relation to
the field magnets generates an alternating current which alternating current is
commutated in the continuous current machine, therefore as a continuous current
coupled with motion will produce an alternating current by ny invention I use an
alternating or varying current coupled with motion to produce a current always
flowing in one direction without using a commutator.
I cause the conductor in which the alternating current passes to approach
towards and recede from another conductor and I synchronise the movements with
the pulsations of the alternating current so that during both advance and retreat
induction operates in one and the same direction and hence gives rise to a current
always flowing in one direction or an approximately continuous current.
The apparatus by which these conditions can be realized admits of variation,
thus the armature of an ordinary alternating current machine may be coupled with
the armature of another similar or analogous machine driven in unison with the
first, both armatures (it may be) carried on the same shaft. The current generated
in the first armature then passes into the second armature and this armature as it
rotates, induces a current in a stationary conductor analogous to the coils of the
electro magnets in the generator of the alternating current.
Also two machines of the type commonly called continuous may in like manner
have the wires of their armatures coupled together where they would have been
connected to their own commutators these two armatures will then be revolved
together on one shaft or spindle the last armature within its ordinary magnetic
[Price 21

page_text: field which will generate a current in both armatures through being coupled and
the second revolved within a helix or helices of wire which would have poles in
the same relation to 2nd helix which the electro magnets have to the last helix.
This last helix will then have the currents induced in it which will be used in the
external circuit.
In another arrangement the armature in which the alternating currents are
generated may consist of a closed revolving circuit each part of which is successively
acted upon by permanent or electro magnets, or a continuous current flowing
through a separate conductor.
The closed circuit with the alternating current flowing through at due to the
magnets (or continuous current as the case may be) is then used to induce currents.
in a stationary conductor which in this case forms the final armature,