IMPROVEMENTS IN MAGNETO- DYNAMO ELECTRIC GENERATORS OR ELECTRO-DYNAMO MAGNETIC MACHINES
Year: 1884

page_text: PROVISIONAL SPECIFICATION..
We ARTHUR SHIPPEY of "Gaston House" 95 Ladbroke Grove Road Bayswater
in the County of Middlesex Electrician and JULES EDQUARD WYDER of N° 2
Afghan Road Clapham Junction in the County of Surrey Electrical Engineer do
hereby declare the nature of our invention for IMPROVEMENTS IN MAGNETO-
DYNAMO ELECTRIC GENERATORS OR ELECTRO-DYNAMO MAGNETIC MACHINES' " to be
as follows:
fi
The object of our invention is to obtain the greatest quantity of electro motive
force from a given power and in order to obtain this result combined with increased
surface we use welded, blended or compressed steel of very high temperature and
hardness and of great resisting power capable of withstanding more wear and tear
and by the adoption of steel of high temperature our magnets are more reliable to
permanent magnetism hence we obtain far greater maguetic power than that
obtained from the ordinary steel now in use and hitherto adopted for this purpose.
We do not confine ourselves to the use of welded steel for our magnets but when
using other classes of steel for this purpose we find it advantageous to have the
same specially manufactured and as free from manganese as possible as any excess
over two per cent of this substance being present in the steel used prevents us from
obtaining the full degree of the permanent maintenance of our magnets the poles of
which we secure alternately and place them in a circular position the number of
which poles may vary according to the size of the machines.
The armatures are made of an improved Gramme type prepared with a perfect
insulation cut from sheets of compressed pulverized homogeneous cocoa nut tibre
packing or by any other well known means of insulation placed between the core
and the wire and sections of same. By this means we preserve the wire from being
damaged by heat which is sometimes caused in over working the machines.
Another feature of our invention is the collecting of the several electric poles of
the armature into two external poles which are then connected through and to a
collector and a pair of brushes to the leads suitably arranged for conveying the
currents produced and in order to obtain this result we connect all the extremities
of the same pole sections together and separately from the other sections by means
of wire carried inside the hollow part of the armature the sections of which

page_text: independently of being coupled are connected with the collectors as before described.
By this arrangement one brush receives the entire current from all the positive
poles of the armature while the other brush is in contact with the negative poles in
a like manner.
We also according to our improvements regulate the position of the brushes in a
very accurate and precise manner which brushes are fixed on to a revolving diso or
segment or each brush on to a separate disc or segment which disc or segment is
provided with a rack toothed wheel or wheels which can be worked to and fro by
a lever or levers bearing a pinion or pinions working and acting upon the above
described racks. In some instances we obtain a similar result in working the racks
in combination with an endless screw and by this arrangement we can regulate the
position of the brushes while the machine is in action with very great accuracy.
A very important and novel feature in connection with our invention is the mode
and manner we adopt for keeping the good and permanent condition of our magnets
which we do by winding a calculated quantity of wire round and near the poles of
the magnets which wire is suitably insulated from the magnets according to require-
ments and by sending a temporary current through that so constructed circuit we
find we increase and maintain greater constancy of the magnets used. We can also
when required by constantly working a current through the said circuit (wholly or
in part by a shunt circuit) which very considerably increases the power of the
machine with however a comparatively low mechanical force.
Machines such as above described can also be used as motors by simply sending
the current through the machine in the reverse direction to that previously
described.
•

page_text: COMPLETE SPECIFICATION,
We ARTHUR SHIPPEY of "Gaston House" 95 Ladbroke Grove Road Bayswater
in the County of Middlesex Electrician and JULES EDOUARD WYDER of N° 2
Afghan Road Clapham Junction in the County of Surrey Electrical Engineer do
hereby declare the nature of our invention for "IMPROVEMENTS IN MAGNETO
DYNAMO ELECTRIC GENERATORS OR ELECTRO DYNAMO MAGNETIC MACHINES and
in what manner the same is to be performed to be particularly described and
ascertained in and by the following statement :—
The object of our Invention is to obtain the greatest quantity of electricity from
a given power and in order to obtain this result we use welded, blended or
compressed steel for the magnets, of very great hardness and resisting power
capable of withstanding more wear and tear, and by the adoption of steel of this
character, our magnets are more reliable to permanent magnetism hence we obtain
far greater magnetic power than that obtained from the ordinary steel now in use
and hitherto adopted for this purpose.
We do not confine ourselves entirely to the use of welded steel for our magnets
for all descriptions of machines, but when using other classes of steel for this
purpose we find it advantageous to have the steel specially manufactured for the
purpose and as free from manganese as possible as any excess over two per cent of
this substance being present in the steel used prevents us from obtaining the full
degree of the permanent maintenance of our magnets, the poles of which we secure
alternately and place them in a circular position the number of which poles may
vary according to the size of the machines.
We may mention that the armatures are made of an improved gramme type
(prepared with a perfect insulation) cut from sheets of compressed pulverized
homogeneous cocoa nut fibre packing. In some cases partly in combination with
vulcanized fibre or any other well known insulation which insulation is placed
between the core and the wire and also between the sections of same. By this
means we preserve the wire from being damaged by heat which is sometimes
chused in overworking the machines.
Another feature of our invention is the collecting of the several electric poles of
the armature into two external poles, which are connected through, and to a
collector and a pair of brushes, to the leads suitably arranged for conveying the
currents produced. In order to obtain this result we connect all the extremities of
the same pole sections together, and separately from the other sections, by means
of wires carried inside the hollow part of the armature the sections of which
independently of being coupled are connected with the collectors as before
described; it being understood that every ring of the drum as shown in section in
the drawings and marked E bears as many leading wires as there are pôles of the
same name in the field magnets, as arranged to excite the armature. By this
arrangement one brush receives the entire current from all the positive poles of the
armature, while the other brush is in contact with the negative poles in a like
manner.

page_text: Figure 3 shows a separate view of the arrangement of the armature grouping
drum and collector showing the manner in which the several parts are combined.
Figuro 4 is an end view of the side of the collector F showing the arrangement
for regulating the brushes.
The standard G supports a ring H by means of three pulleys I the ring H revolves
concentric to the shaft C and carries (insulated from it) spindles J which support
the brush holders and brushes K.
The front of the standard G is provided with a fixed dial L the circumference of
which is pierced with a number of small pin holes and the centre of the said dial
carries a spindle O upon which a lever P is fixed the outer end of which carries a
pin which can be dropped into any of the pin holes in the circumference of
the dial a small stud R being used for changing the position of the lever P.
At the other end of the spindle O a cog wheel T is mounted the teeth of which
enter between the pins U fixed in the disc H the movement of the lever P
thus gives motion to the disc H for the purpose of regulating the brushes which
is of great advantage to be able to effect whilst the machine is in action.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed we declare that we
make no claim to any of the parts separately which are well known and in
common use but what we claim is
First. The use and application of welded and compressed steel magnets as and
for the purposes herein before set forth and described.
Second. The improved method of arranging and collecting of the several poles
of the armature into two external poles substantially as hereinbefore described and
shewn in the drawings annexed.
Third. The improved arrangement and combination of a rack and toothed whoel
or wheels actuated by a lever or levers for regulating the position of the brushes
substantially in the manner herein before described and shown in the drawings
annexed and for the purposes set forth and explained.
Fourth. The use and application of compressed cocoa nut fibre as an insulating
material for dynamo machines and electric motors.
Fifth. The method adopted and hereinbefore described for obtaining the
permanent maintenance of magnetism as and for the purposes set forth.
Sixth. The improved general arrangement and combination of the several parts
working in conjunction with each other substantially in the manner and for the
purposes hereinbefore described and illustrated in the drawings annexed,
Dated this 24th day of March 1885.
TONGUE & BIRKBECK,
34, Southampton Buildings, Chancery Lane, W.C.,
Agents for the Patentees.