IMPROVEMENTS IN MAGNETO- ELECTRIC AND ELECTRO-MAGNETIC APPARATUS OR MACHINES
Year: 1876

page_text: LETTERS PATENT to Geminiano Zanni, of Highbury, in the, County of Middlesex,
Medical Electrician, for the Invention of IMPROVEMENTS IN MAGNETO-
ELECTRIC AND ELECTRO-MAGNETIC APPARATUS OR MACHINES."
Sealed the 19th December 1876, and dated the 11th July 1876.
PROVISIONAL SPECIFICATION left by the said Geminiano Zanni at the
Office of the Commissioners of Patents on the 11th July 1876.
GEMINIANO ZANNI, of Highbury, in the County of Middlesex, Medical Electrician.
"IMPROVEMENTS IN MAGNETO-ELECTRIC AND ELECTRO-MAGNETIC APPARATUS OR
MACHINES."
My said Invention relates, first, to improvements in magneto-electric apparatus
or machines, and consists in the novel construction of an induction coil and in the
combination of the same with the other parts of the said apparatus or machine.
I construct the said coil in the form of a cylinder with a series of soft iron arms
or cores projecting from a boss or centre which is fixed on a central shaft or axis.
Each core or arm may consist of a single piece or a number of plates of soft iron.
I inay use any desired even number of these arms or cores. Each of the said cores
is formed with a flange or segment which forms part of the periphery of the said
cylinder; this periphery is therefore not a continuous surface but consists of the
said segments or flanges.
The said arms or cores are covered or coiled with insulated copper or other suit-
able wire like ordinary electro-magnetic bobbins, and this wire is extended across
the shaft or axis so that each pair of bobbins, that is to say, those two that are
opposite each other, will be connected, and the ends of the said wires are connected
to a commutator fitted on the said shaft or axis. The wires from each pair of
bobbins are attached to separate brakes or insulated pieces on the said commutator
which is placed in connection with suitable conducting springs, friction rollers,
brushes, or the like in the usual manner.
The said induction coil apparatus consisting of the wheel or series of bobbins
above described is arranged in combination with a natural magnet or magnets as
described in the Specification of my former Letters Patent bearing date December
10, A.D. 1870, No. 3245.
To increase the effect of my apparatus or machine I coil or wind upon the
magnet copper or other suitable wire whose ends are extended to and connected

page_text: with the said springs or other contact devices of the commutator. By thus coiling
these wires upon a compound magnet I greatly augment the magnetic power
thereof.
The said Invention is also arranged in combination with a steam engine, clock
work, or other means for imparting rotary motion to the said induction apparatus.
In adapting my said Invention to an electro-magnetic apparatus I use an electro-
magnet and batteries in place of the aforesaid natural magnet or magnets.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by the
said Geminiano Zanni in the Great Seal Patent Office on the 11th January
1877.
GEMINIANO, ZANNI, of Highbury, in the County of Middlesex, Medical Electrician.
"IMPROVEMENTS IN MAGNETO-ELECTRIC AND ELECTRO-MAGNETIC APPARATUS OR
MACHINES."
My said Invention relates chiefly to improvements in magneto-electric apparatus
or machines used for electro-plating, electro-typing, and various chemical, metal-
lurgical, and other purposes, and consists in the novel construction of an induc-
tion coil, and in, the combination of the same with the other parts of the said
apparatus or machines."
The said Invention is illustrated in the accompanying Drawing, which I will
now proceed to describe.
Figure 1 is a side elevation of an induction coil and its adjuncts constructed
according to iny Invention. Figure 2 is an end elevation of Figure 1. Figure 3 is
a transverse section on the line a, a, Figure 1.
Figure 4 is an end view showing a modified construction of my improved in-
duction coil, with its end plate and the commutator removed to exhibit the interior
of the same. Like letters indicate the same parts throughout the Drawing.
In the form of my Invention illustrated in Figures 1, 2, and 3, I construct the coil
a in the form of a cylinder with a series of soft iron arms or cores b, c, d, e, f, g, h, i,
projecting from central pieces forming a boss j which is fixed on a central shaft or
axis. Each core or arm may consist of a single piece of soft iron or a number
of soft iron plates fitted and secured together. I may use four, six, eight, or any
other desired even number of these arms or cores.
As shewn in Figure 1 the said cores are long plates or blades extending from
end to end of the coil, but if desired I may use two or more short plates to make
up the length, or I may use a series of round arms or bobbins placed side by side.
Each of these cores b, c, d, e, f, g, h, &, has a flange or segment which forms part
of the periphery of the said cylinder, as clearly shewn in Figure 3, this periphery
therefore consists of the outer surface of the segments or flanges b¹, c', d', e¹‚f¹, g', h¹, i.
The said arms or cores are covered or coiled with insulated copper or other suit-
able wire, as shown at 7, like ordinary electro-magnetic bobbins, and this wire is
extended across the shaft or axis k so that each pair of bobbins will be connected,
and the ends of the said wires are attached to a commutator m fitted on the said
shaft or axis.
In the arrangement shown in Figure 3 the pairs, that is to say, the bobbins, that
are connected with each other are b, f; c, g; d, h; and e, 2. The wires from cach
of these pairs of bobbins are connected to separate brakes or insulated pieces m³,
m², m³, m³, m³, m³, m³, m³, in the said commutator which is placed in connec-
tion with suitable conducting springs'n, or with friction rollers, brushes, or the
like, in the usual manner. 0, 0, are plates which close the ends of the coil or
cylinder a.
In the induction coil illustrated in Figure 4 I modify the above described novel
construction by using for the peripheral portion of the coil an iron tube or cylinder a¹
which is fitted and secured upon the arms b, c, d, e, f, g, h, i, in any suitable and

page_text: convenient manner.. The said arms may in this case be cast all in one piece or
may be formed separately, and secured to the central boss.
The said induction coil apparatus consisting of the wheel or series of bobbins
above described, and constructed as shown in Figure 3 or in Figure 4, is arranged in
combination with a natural magnet or magnets as described in the Specification of
my former Letters Patent bearing date December 10, A.D. 1870, No. 3245.
To increase the effect of my apparatus or machine I in some cases coil or wind
upon the poles of the compound magnet copper or other suitable wire whose ends
are extended to and connected with the said springs or other devices combined with
the commutator. By thus coiling these wires upon the compound magnet I greatly
augment the magnetic power thereof.
The said Invention is arranged in combination with a steam engine, clockwork,
or other means for imparting rotary motion to the said induction apparatus.
In adapting my said Invention to an electro-magnetic apparatus I use electro-
magnets in place of the aforesaid natural magnet or magnets.
Having thus fully described my said Invention and shewn how the same may be
conveniently and advantageously carried into practise, I wish it understood that I
claim―
First. An induction coil. or cylinder constructed with a series of pairs of soft
iron, arms, bars, or plates, projecting from a central axis and with insulated wire
coiled thereon, and connected with a commutator, as shown in Figures 1, 2, 3, of
the Drawing, and as above set forth.
Second. The modified form of this induction coil or cylinder, illustrated in
Figure 4 of the Drawing, and as above described.
Third. The combination of the said induction coil or cylinder with the natural
magnet or magnets in a magneto-electric apparatus or machine, as above set forth.
Fourth. The combination of my improved induction coil or cylinder with electro-
magnets in an electro-magnetic apparatus or machine, as above set forth.
In witness whereof, I, the said Geminiano Zanni, have hereunto set my hand
and seal, this Tenth day of January, in the year of our Lord One thousand
eight hundred and seventy-seven.
GEMINIANO ZANNI. (L.S.)