Year: 1886

page_text: Date of Application, 24th Dec., 1886
.. Complete Left, 21st Sept., 1887
Complete Accepted, 28th Oct., 1887
I, JOSEPH DEVONPORT FINNEY ANDREWS, of Woodside Electric Works, Glasgow
in the County of Lanark, Electrical Engineer, do hereby declare the nature of this
invention to be as follows:-
My invention relates to apparatus for converting alternating electrical currents into
alternating or continuous currents of different pressure. For this purpose, I connect
the lead for the primary currents to a number of parallel conducting plates presenting
extended surface, the connection being made in each case either in parallel arc by
branching the lead to the several plates, or in series by leading the current through
all the plates in succession. Between the plates for the primary currents and in close
proximity to them, but insulated from them, I interpose a corresponding number of
plates connected either parallel or in series to the lead for the alternating secondary
currents which are produced by induction from the alternating primary currents. To
intensify the the inductive effect I prefer to surround the plates with iron slabs or to
interpose such slabs between each pair of parallel plates so as to influence both.
When it is desired to render the secondary currents continuous instead of alter-
nating, I cause the one set of plates, either the primary or the secondary set, to move
to and from those of the other set in exactly the interval of time separating each
alternation of current from the next, so that the secondary lead, instead of receiving
reversals of current, which it would do if both sets of plates were stationary, receives
successive impulses of current always in one direction, constituting a continuous
current. As it is difficult to arrange plates to be moved in this manner, I for this
purpose make the conductors in the form of coils one set of which can be made to
revolve in close proximity to the other set. In order to ensure the due timing of the
movement to the alternations of the primary current, the motion may be derived from
a electro dynamic machine worked by the primary alternating current.
Dated this 24th day of December 1886.
ABEL & IMRAY,
Agents for the Applicant.

page_text: I, JOSEPH DEVONPORT FINNEY ANDREWS of Woodside Electric Works, Glasgow,
in the County of Lanark, Electrical Engineer, 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 :-
My invention relates to apparatus for converting alternating electrical currents into
alternating or continuous currents of different pressure. For this purpose, I connect
the lead for the primary currents to a number of parallel conducting plates presenting
extended surface, the connection being made in each case either in parallel arc by
branching the lead to the several plates, or in series by leading the current through
all the plates in succession.
Between the plates for the primary currents and in close proximity to them, but
insulated from them, I interpose a corresponding number of plates connected either
parallel or in series to the lead for the alternating secondary currents which are
produced by induction from the alternating primary currents.
To intensify the inductive effect I prefer to surround the plates with iron slabs or
to interpose such slabs between each pair of parallel plates so as to influence both.
Fig. 1 of the accompanying drawings shews diagrammatically an arrangement of
the primary plates in series while the secondary plates s are connected parallel to the
lead for the lamps L. This may be duplicated as shewn diagrammatically by Fig. 2
by applying the arrangement to both leads, that to and that from the lamps.
When it is desired to render the secondary currents continuous instead of alternating,
I cause the one set of plates either the primary or the secondary set to move to and
from those of the other set in exactly the interval of time separating each alternation
of current from the next, so that the secondary lead, instead of receiving reversals of
current, which it would do if both sets of plates wore stationary, receives successive
impulses of current always in one direction, constituting a continuous current. As it
is difficult to arrange plates to be moved in this manner, I for this purpose make the
conductors in the form of coils one set of which can be made to revolve in close
proximity to the other set.
In order to ensure the due timing of the movement to the alternations of the
primary current, the motion may be derived from an electro dynamic machine worked
by the primary alternating current.
Having now particularly described and ascertained the nature of this invention
and in what manner the same is to be performed 1 declare that what I claim is :-
For converting electrical currents into currents of different pressure, the combina-
tion of a number of parallel conducting plates connected to the primary lead with a
corresponding number of intermediate parallel plates insulated from the former and
connected to the secondary lead, substantially as described.
Dated this 21st day of September 1887.
ABEL & IMRAY,
Agents for the Applicant.