IMPROVEMENTS IN MAGNETO-ELECTRIC MACHINES
Year: 1870

page_text: LETTERS PATENT to Zenobe Theophile Gramme and Eardley Louis
Charles D'Ivernois, both of Paris, France, Gentlemen, for the In-
vention of "IMPROVEMENTS IN MAGNETO-ELECTRIC MACHINES."
Sealed the 22nd November 1870, and dated the 9th June 1870.
PROVISIONAL SPECIFICATION left by the said Zenobe Theophile
Gramme and Eardley Louis Charles D'Ivernois at the Office of
the Commissioners of Patents, with their Petition, on the 9th June
1870.
We, ZENOBE THEOPHILE GRAMME and EARDLEY LOUIS CHARLES
D'IVERNOIS, both of Paris, France, Gentlemen, do hereby declare the
nature of the said Invention for "IMPROVEMENTS IN MAGNETO-ELECTRIC
MACHINES," to be as follows :—
These improvements in magneto-electric machines consist in giving
to the soft iron or other suitable magnetic material which is to become
magnetized by the influence of one or more either permanent or electro-
magnets, the form of a solid or hollow ring, cylinder, or other suitable
endless shape, constructed either out of one piece of iron or of a bundle

page_text: of iron wires, and round the entire surface of which endless core is laid
a series of coils of suitably isolated wire of copper or other good con-
ductor of electricity, in such manner that the said coils or helixes of
wire, together with the endless core on which they are laid, may be
considered as forming one continuous series of small bobbins, the wire
of each two succeeding ones of which small bobbins being soldered or
otherwise metallically connected together end to end, so as to constitute
one large endless bobbin, in which when the said bobbin is caused to
revolve with a regular continuous motion continuous induction currents
will be developed by the magnetic radiation of the poles of one or more
either permanent or electro-magnets, to the influence of which the said
endless bobbin is submitted, the continuity of the revolution of the
bobbin procuring in this latter a continuous displacement or advancing
of the magnetism, viz., without desmagnetization or interruption, and
without requiring the use of pole changers or commutators as was
hitherto the casc. At each junction of the wire of the series of small
bobbins, which by their connection constitute the large endless bobbin,
is soldered a connecting rod of brass or other suitable good con-
ductor of electricity, which conducting rods are kept properly isolated
from each other, whilst two or more metal springs, rollers, or other
conducting rubbers coming in regular succession in contact with the
free end of each of the said rods serve for conveying the induction
currents in the required respective directions, and allow of applying,
if required, part of the currents for charging the electro-magnets
(in case these latter be made use of), and of applying the currents
to any suitable industrial, physiological, or other useful purposes.
Provision is made for allowing to impart a suitable revolving motion
cither to the endless large bobbin or to the permanent or the electro-
magnets which serve for inducing by their influence electric currents
in the endless large bobbin, and for allowing of charging, if wished, the
continuous into alternate currents. The coils of wire of the large
endless bobbin may, if wished, be replaced by coils made of strips or
ribbons of brass, or other suitable good conductor of electricity suitably
isolated from each other and form an endless core.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Zenobe Theophile Gramme and Eardley Louis
Charles D'Ivernois in the Great Seal Patent Office on the 9th
December 1870.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, ZENOBE
THEOPHILE GRAMME and EARDLEY LOUIS CHARLES D'IVERNOIS, both
of Paris, France, Gentlemen, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Ninth day of June, in the year of our
Lord One thousand eight hundred and seventy, in the thirty-third year
of Her reign, did, for Herself, Her heirs and successors, give and grant
unto us, the said Zenobe Theophile Gramme and Eardley Louis Charles
D'Ivernois, Her special license that we, the said Zenobe Theophile
Gramme and Eardley Louis Charles D'Ivernois, our executors, adminis-
trators, and assigns, or such others as we, the said Zenobe Theophile
Gramme and Eardley Louis Charles D'Ivernois, our executors, adminis-
trators, and assigns, should at any time agree with, and no others, from
time to time and at all times thereafter during the term therein expressed,
should and lawfully might make, use, exercise, and vend, within the
United Kingdom of Great Britain and Ireland, the Channel Islands,
and Isle of Man, an Invention for "IMPROVEMENTS IN MAGNETO-ELECTRIC
Machines,” upon the condition (amongst others) that we, the said Zenobe
Theophile Gramme and Eardley Louis Charles D'Ivernois, our executors
or administrators, by an instrument in writing under our, or their, or
one of their hands and seals, should particularly describe and ascertain
the nature of the said Invention, and in what manner the same was to
be performed, and cause the same to be filed in the Great Seal Patent
Office within six calendar months next and immediately after the date
of the said Letters Patent.
NOW KNOW YE, that we, the said Zenobe Theophile Gramme and
Eardley Louis Charles D'Ivernois, do hereby declare the nature of the
said Invention, and in what manner the same is to be performed, to be
particularly described and ascertained in and by the following statement
thereof
These improvements in magneto-electric machines consist in giving
to the soft iron or other suitable magnetic material which is to become

page_text: magnetized by the influence of one or more either permanent or electro-
magnets the form of a solid or hollow ring cylinder or other suitable
endless shape constructed either out of one piece of iron or of a bundle of
iron wires, and round the entire surface of which endless core is laid a
series of coils of suitably isolated wire of copper or other good conductor
of electricity, in such manner that the said coils or helixes of wire,
together with the endless core on which they are laid, may be considered
as forming one continuous series of small bobbins, the wire of each two
succeeding ones of which small bobbins being soldered or otherwise
metallically connected together end to end, so as to constitute one large
endless bobbin, in which when the said bobbin is caused to revolve
with a regular continuous motion continuous induction currents will
be developed by the magnetic radiation of the poles of one or more
either permanent or electro-magnets, to the influence of which the said
endless bobbin is submitted, the continuity of the revolution of the
bobbin procuring in this latter a continuous displacement or advancing
of the magnetism, viz., without desmagnetization or interruption, and
without requiring the use of pole changers or commutators as was
hitherto the case. At each junction of the wire of the series of small
bobbins, which by their connection constitute the large endless bobbin
is soldered or connecting rod of brass or other suitable good conductor
of electricity, which conducting rods are kept properly isolated from
each other, whilst two or more metal springs, rollers, or other con-
ducting rubbers coming in regular succession in contact with the free end
of each of the said rods serve for conveying the induction currents in the
required respective directions, and allow of applying, if required, part of
the currents for charging the electro-magnets (in case these latter be
made use of), and of applying the currents to any suitable industrial,
physiological, or other useful purposes. Provision is made for allowing
to impart a suitable revolving motion either to the endless large bobbin
or to the permanent or electro-magnets, which serve for inducing by
their influence electric currents in the endless large bobbin and for
allowing of charging if wished the continuous into alternate currents.
The coils of wire of the large endless bobbin may, if wished, be replaced
by coils made of strips or ribbons of brass or other suitable good conductor
of electricity suitably isolated from each other and form an endless core.
And having now described the nature of the said Invention, and in
what manner the same is to be performed, I declare that I claim, the

page_text: improvements in electro-magnetic machines substantially as above
described.
In witness whereof, we, the said Zenobe Theophile Gramme and
Eardley Louis Charles d'Ivernois, have hereunto set our hands
and seals, this Twenty-eighth day of November, One thousand
eight hundred and seventy.
ZÉNOBE THÉOPHILE GRAMME.
(L.S.)
Pour EARDLEY LOUIS CHARLES D'IVERNOIS
GRAMME.
(L.S.)