IMPROVEMENTS IN DYNAMO ELECTRIC OR MAGNETO ELECTRIC MACHINES
Year: 1880

page_text: LETTERS PATENT to Edward Griffith Brewer, of 33, Chancery Lane, in the
County of Middlesex, for an Invention of "IMPROVEMENTS IN DYNAMO
ELECTRIC OR MAGNETO ELECTRIC MACHINES." A communication from abroad
by Alexis Jean Bantiste Cance of Paris France.
PROVISIONAL SPECIFICATION left by the said Edward Griffith Brewer at
the Office of the Commissioners of Patents on the 2nd October 1880.
EDWARD GRIFFITH BREWER, of 33, Chancery Lane, in the County of Middlesex.
"IMPROVEMENTS IN DYNAMO ELECTRIC OR MAGNETO ELECTRIC MACHINES."
A communication from abroad by Alexis Jean Baptiste Cance, of Paris, France.
The object of this Invention is the production of a new kind of dynamo or
magneto electric machine for the production of continuous or alternate electric
currents capable of being used for all purposes, such as the electric light, galvano
plastics, transformation into motive power, and all other purposes to which electricity
is applicable.
This new apparatus is essentially composed of one or several induction crowns
or rings, being formed of bobbins horizontally, independent, placed circularly on a
support in the form of a wheel mounted on the shaft of the machine. While
rotating the poles of the induced bobbins pass successively before the poles of a
certain number of inducting or conducting bobbins placed two and two on one
same diameter of the apparatus, preferably four bobbins placed two and two on the
same vertical diameter.
In this machine, preferably, electro magnetic bobbins with multiple cores are
used, made according to a system known as "Cance's," for which British Letters
Patent were granted the 14 May 1878, No. 1927, because of the energetic
induction effects which they produce; but bobbins or electro magnet armatures of
ordinary construction may also be employed.
Machines constructed according to this Invention give at will continuous or
alternate currents; to obtain continuous currents the wires of the induced system
are arranged in such manner as to collect by means of a collector the currents
developed in the system, and to make them pass throughout the conducting

page_text: system; to obtain alternate currents an electric current coming from any inter-
mediate source is caused to pass in the conductors, and by means of rubbers the
currents developed in the induced system are collected; the wires of this latter
system may also be arranged for tension for series or for quantity, according to
the applications to which it is to be put. In theory it would, for obtaining
alternate currents, be an advantage to employ a number of conducting bobbins
equal to the number of induced bobbins; the conducting or the induced parts may
be made to revolve at will, but in practice it is preferable to use the motion of the
conductors to that of the induced system.
The machine is supported by two side frames of cast iron arranged vertically,
and united by two cast iron cross pieces. The two frames carry internally a boss
or bush, through which the axis of the machine passes. Four large conductor or con-
ductive bobbins placed parallel to the axis are fixed two and two internally on each
frame bracket by their central core; the magnetic poles of these bobbins are opposite,
leaving between them a space sufficient for the passage of the induced bobbins.
These inductive bobbins influence the induced system by their four magnetic poles
at a time, and presenting from bottom to top polarities of contrary character.
Besides to increase the magnetic force of the inductive or conducting bobbins they
may be connected two and two by an iron crown or ring, which the inventor calls
a magnetic crown; this crown may be divided in two along its horizontal
diameter.
The induced system may, for example, be composed of 24 distinct bobbins fixed
on a bronze crown by means of two screws, whereby it can be easily taken to
pieces and a partial replacement of these bobbins take place in case of accident and
weaken the danger of the centrifugal force.
The induced crown is composed in reality of two concentric crowns, it follows
that the speed of the internal crown is less than the speed of the external crown
from which results an inequality of the magnetic influence of the conductors on the
two crowns. This inconvenience is guarded against by alternating the bobbins of the
two crowns, and by increasing the polarised surface of the interior bobbins by pro-
Each
longing externally the arms which serve to attach them on the bronze crown.
bobbin which constitutes the induced system is completely insulated from the
others; these bobbins have no breech ("culasse") and the two poles opposite to
the bobbin are influenced at one time, sometimes by the conducting bobbins at top
and sometimes by those at bottom. The 24 bobbins of the induced crown are
united for tension. The induction effects then produced are the same as in machines
already known. The developed currents of the sort are collected by two rubbers,
which touch the collectors according to the line of the poles of the induced
system.
All the wires issuing from or entering the induced bobbins abut on an inter-
mediate collector completely insulated, and from whence the wires start which go
to the collector, properly so called, so as to facilitate the taking to pieces of the
collector or induced bobbins. These latter wires penetrate by four apertures into
a central opening formed in the shaft, and each abuts against one of the corners of
the collector.
The collector placed externally can then be replaced without it being necessary
to take the machine to pieces. It is composed of as many pieces (arranged on a
barrel) of copper, as there are bobbins in the induced system. These pieces rest
on a bronze collar and are insulated electrically the one from the other, and also
from the collar on which they are held by means of two iron or brass rings insulated
from the copper pieces.
The rubber carriers or brushes are fixed on a bronze ring divided diametrically
by means of a rod, which allows them an oscillating motion in order that the
rubbers may be always in perfect contact on the collector in spite of the wear to
the contact portions. The rubber is held up to the collector by means of a helical
spring suitably arranged, the tension of which is regulated by means of set a
screw.

page_text: The split ring is attached on a bronze ring, from which it is insulated in an
electric point of view, and which is carried by a concentric internal ring on which
it can turn in a triangular groove formed on the circumference.
The internal ring fixed on the frame of the machine is in two halves or split
perpendicularly to its axis, in order that the external ring may be introduced into
its triangular groove. The rods or gudgeons of the rubber carriers pass through
the ring from which they are insulated, and are fixed one on one of the halves of
the split ring, the other on the other, to establish electric communication between
these two halves of the ring and the rubbers. Two secondary rubbers formed of
spring blades applied respectively in a groove formed on the circumference of the
two halves of the ring establish the electrical communication with the conductors
of the machine, which are traversed in derivation by the current developed in the
induced system. By causing the ring to rotate by means of a roller pinion the
rubbers are circularly displaced; the rubbers on the whole circumference of
the collector on button serves to stop them in a determined position. This dis-
placement of the rubbers allows during the operation of the machine the finding
of the maximum point of the effects produced by the machine, or to increase or
diminish its effects at will.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Edward Griffith Brewer in the Great Seal Patent Office on the
2nd April 1881.
EDWARD GRIFFITH BREWER, of 33, Chancery Lane, in the County of Middlesex.
"IMPROVEMENTS IN DYNAMO ELECTRIC OR MAGNETO ELECTRIC MACHINES."
(A communication from abroad by Alexis Jean Baptiste Cance, of Paris, France.)
The object of this Invention is the production of a new kind of dynamo or
magneto electric machine for the production of continuous or alternate electric
currents capable of being used for all purposes, such as the electric light, galvano
plastic, transformation into motive power, and all other purposes to which electricity
is applicable.
This new apparatus is essentially composed of one or several induction crowns or
rings, being formed of bobbins horizontally independent placed circularly on a
support in the form of a wheel mounted on the shaft of the machine. Whilo
rotating, the poles of the induced bobbins pass successively before the poles of a
certain number of inducting or conducting bobbins placed two and two on one
same diameter of the apparatus, preferably 4 bobbins placed two and two on
the same vertical diameter.
"
In this machine, preferably electro magnetic bobbins with multiple cores are
used, made according to a system known as Cances," for which British Letters
Patent were granted the 14th May 1878, No. 1927, because of the energetic
induction effects which they produce, but bobbins or electro magnet armatures of
ordinary construction may also be employed.
Machines constructed according to this Invention give at will continuous or
alternate currents. To obtain continuous currents the wires of the induced system
are arranged in such manner as to collect by means of a collector the currents
developed in the system, and to make them pass throughout the conducting
system. To obtain alternate currents an electric current coming from any inter-
mediate source is caused to pass in the conductors, and by means of rubbers the
currents developed in the induced system are collected. The wires of this latter
system may also be arranged for series or for quantity, according to the applications
to which it is to be put. In these it would, for obtaining alternate currents, be an
advantage to employ a number of conducting bobbins equal to the number of
induced bobbins. The conducting or the induced parts may be made to revolve
at will, but in practice it is preferable to use the motion of the conductors to that
of the induced system.
In order that this Invention may he fully understood illustrations of machines
constructed according thereto are given in the accompanying Drawings. Figure 1 is a
perspective view of a machine constructed according to this Invention; Figure 2 is
a perspective view of a double crown of induction bobbins; Figure 3 and Figure 4
illustrate the coupling of the induction bobbins; Figures 5 and 6 show in front
view and section the bronze inductor carrier for carrying the induction crowns;
Figures 7 and 8 show a conducting bobbin; Figure 9 is a longitudinal section of
the shaft and collector; and Figure 10 shows the attachment rings of the friction
carriers.
Four
The machine is supported by two side frames of cast iron A, A¹, arranged
vertically, and united by two cast iron cross pieces B, B¹. The two frames carry
internally a boss or bush, through which the axis of the machine passes.
large conductor or conductive bobbins c, c', c², c³, placed parallel to the axis are
fixed two and two internally on each frame bracket by their central core. The
magnetic poles of these bobbins are opposite, leaving between them a space

page_text: sufficient for the passage of the induced bobbins. These induction bobbins influence
the induced system by their four magnetic poles at a time, and presenting from
bottom to top polarities of contrary character. Besides, to increase the magneto
force of the inductive or conducting bobbins, they may be connected two and two
by an iron crown or ring, which the inventor calls a magnetic crown, Figures 3
and 4; this crown may be divided in two along its horizontal diameter. The
induced system inay, for example, be composed of twenty four distinct bobbins D
fixed on a bronze crown (Figures 2 and 7) by means of two screws E, E¹, whereby
it can be easily taken to pieces, and a partial replacement of these bobbins take
place in case of accident, and lessen the charge of the centrifugal force.
The induced crown is composed in reality of two concentric crowns.
It follows
that the speed of the internal crown is less than the speed of the external crown,
from which results an inequality of the magnetic influence of the conductors on the
two crowns. This inconvenience is guarded against by alternating the bobbins of
the two crowns and by increasing the polarised surface of the interior bobbins by
prolonging externally the arins which serve to attach them on the bronze crown.
As seen at Figures 2 and 6, each bobbin which constitutes the induced system is
completely insulated from the others. These bobbins have no breech, and the two
poles opposite to the bobbin are influenced at one time, sometimes by the inductive
bobbins at top, and sometimes by those at bottom. The twenty four bobbins of the
induced crown are united for tension. The induction effects then produced are
the same as in machines already known. The developed currents of this sort are
collected by two rubbers which touch the collectors, according to the line of the
poles of the induced system.
All the wires issuing from or entering the induced bobbins abut on an-
intermediate collector H, Figure 9, completely insulated, and from whence the
wires start which go to the collector properly so called, so as to facilitate the
taking to pieces of the collector or induced bobbins. These latter wires penetrate
by four apertures into a central opening formed in the shaft, and each abuts against
one of the corners of the collector J, Figures 1 and 9.
In order to better understand this arrangement a longitudinal section of this
hollow shaft is given at Figure 9.
The collector J, placed externally, can then be replaced without it being necessary
to take the machine to pieces.
It is composed of as many wedge pieces (like staves in a barrel) of copper as
there are bobbins in the induced system. These pieces rest on a bronze collar J',
and are insulated electrically, the one from the other, and also from the collar, on
which they are held by means of two iron or bronze rings J2 insulated from the
copper pieces.
The rubber carriers or brushes are fixed on a bronze ring K, divided diametrically
by means of a rod L, which allows them an oscillating motion in order that the
rubbers may be always in perfect control on the collector in spite of the wear to
the centre portions. The rubber is held up to the collector by means of a helical
spring suitably arranged, the tension of which is regulated by means of a set
screw.
As seen at Figure 10, the split ring K is attached on a bronze ring U, from which
it is insulated in an electric point of view, and which is carried by a concentric
internal ring V, on which it can turn in a triangular groove formed on the
circumference.
The internal ring V, fixed on the frame of the machine, is in two halves, or split
perpendicularly to its axis, in order that the external ring U may be introduced
into its triangular groove.
The rods or gudgeons L of the rubber carriers pass through the ring U, from
which they are insulated, and are fixed one on one of the halves of the split
ring K, the other on the other to establish electric communication between these
two halves of the ring and the rubbers. Two secondary rubbers L, Figure 1,
formed of spring blades applied respectively in a groove formed on the circumference

page_text: of two halves of the ring K, establish the electrical communication with the
conductors of the machine, which are traversed in derivation by the current
developed in the inductive system. By causing the ring U to rotate by means of a
roller pinion X the rubbers on the whole circumference of the collector are circularly
displaced; a button R serves to stop them in a determined position. This
displacement of the rubbers allows during the operation of the machine the finding
of the maximum point of the effects produced by the machine, or to increase or
diminish its effects at will.
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 aforesaid "Improvements in
Dynamo Electric or Magneto Electric Machines,"
First. The general arrangement of machine comprised essentially of a single or
multiple induction crown, being composed of a varying number of distinct bobbins,
preferably without breech, with multiple or ordinary cores, revolving between the
poles of induction bobbins conveniently arranged and fixed on the frame of the
machine.
Second. The arrangement of the bobbins of the induced system without breech,
and receiving induction influences by their two poles at the same time, their mode
of attachment on the bronze carrier and the increase of their. magnetic surface,
substantially in the manner and for the purpose set forth.
Third. The mode of constructing and mounting collectors, substantially as set
forth.
Fourth. The arrangement of the friction carriers and rings which carry them
with the object of allowing of their circular displacement, in the manner and for
purposes before set forth.
In witness whereof, I, the said Edward Griffith Brewer, have hereunto set
my hand and seal, this First day of April, in the year of our Lord One
thousand eight hundred and eighty one.