Improvements relating to Alternating Current Electric Machinery.
Year: 1892

page_text: Date of Application, 5th May, 1892
Complete Specification Left, 4th Feb., 1893-Accepted, 18th Mar., 1893
PROVISIONAL SPECIFICATION.
Improvements relating to Alternating Current Electric Machinery.
I, OCTAVE PATIN, of 11 Rue du Point du Jour, Paris-Auteuil, in the Republic
of France, do hereby declare the nature of this invention to be as follows:-
My invention relates to machines for alternating currents of high tension, which
comprise one or more movable inductors and a fixed armature. A machine
constructed in accordance with my invention may be placed directly upon the
shaft of the steam engine, where it occupies the place of the fly wheel. It may
also be arranged horizontally below a turbine having a vertical axis.
In a machine having a single movable inductor, the inductor is multipolar and
presents the form of an internally toothed wheel. Around all the teeth or polar
projections are placed coils of electric wire all connected for tension, and the current
passes through them in such a manner that it will alternately produce poles.
The two extremities of the wires communicate with two rings fixed upon the
nave or axle of the inductor. The current of the exciting machine is conducted
to these two rings through two brushes placed upon the fixed armature.
The armature is formed of two crowns one being provided with arms and the
other being without arms. These crowns are cast and connected with each other
by means of bolts, the whole formning a drum. Between the two crowns and upon
the periphery are placed sheets of iron in the form of disc segments and placed
together in such a manner that they form a great number of closed magnetic
circuits.
Upon the drum thus made are fixed the armature coils parallel with the axis,
these coils are made of thin copper bands wound upon a core having a special
form in order to obviate eddy currents.
The core of the coil has the form of a rectangle rounded at the corners, the
periphery being furnished with a channel or groove which holds the wire in its
place. The interior part of the core is hollowed out, one of the extremities
being slit and an insulator is placed therein for preventing the circulation of
wasteful induced currents. Each coil is independent of the others and the.
connections are external. The coils are held upon the periphery of the crown
by means of screws which pass through nuts sunk in sulphur and situated in the
lugs of the two crowns of cast iron.
The fixed armature can be very easily withdrawn from the machine without
dismounting anything.
For this purpose the nave of the armature rests upon a cast iron tube forming
part of the pedestal. The said pedestal has two lugs on the right and left, each of
which is pierced with a hole. In the two holes of the lugs are two nuts carrying
pinions, the said pinions being set in motion simultaneously by a toothed wheel
caused to turn by means of a crank. Two screws fixed upon the arms of one of the
crowns of the armature engage with these nuts. It will be readily understood that
in order to withdraw the armature it is sufficient to set the toothed wheel in
motion.
Besides this movement I may cause the armature to turn upon the cast iron
tube; it is sufficient for this purpose to loosen the two screws, which takes place
automatically as soon as the armature is withdrawn if the turning is continued.
As the armature can turn upon its axial tube it is easy to get access to and clean
all the coils.
When I make a machine with two movable inductors, I prefer to replace the
crown of soft iron which is used in the preceding arrangement below the induced
coils by a second movable inductor of the same kind as the first inductor and

page_text: turning together with it. From this results that the coils connected with each
other form a crown situated between two toothed inductors which turn with the
shaft of the steam engine.
The two movable inductors may be connected upon the same crown in order to
facilitate the mounting of the same. They are formed by two wheels, the one
toothed inside and the other outside, so that the poles of unlike names shall be
opposite and that the poles shall be for each inductor alternatively north and south.
The coils of the armature are immovable and fixed upon a cast-iron crown, being
carefully insulated from the same.
The inductors may also take another form, in which a single crown is provided
with coils and has poles of a certain length; the other possessing simple projections
which are comparatively short and serve to direct the flux.
In all the arrangements the armature is movable and can be easily withdrawn
from the machine without any necessity for dismounting any part.
The machine may be double and be composed of two groups of inductors already
described, the coils of the armature being fixed in the middle upon a circular
crown. The dismounting of the machine is in this case effected by withdrawing
one inductor from one side and the other inductor from the other.
Dated this 5th day of May 1892.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements relating to Alternating Current Electric Machinery.
I, OCTAVE PATIN, of 11 Rue du Point du Jour, Paris-Auteuil, in the Republic
of France, 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 machines for alternating currents of high tension, which
comprise one or more movable inductors and a fixed armature.
A machine constructed in accordance with my invention may be placed directly
upon the shaft of the steam engine where it occupies the place of the fly wheel.
It may also be arranged horizontally below a turbine having a vertical axis.
In the accompanying drawing I have shown, by way of example, bow my invention
may be carried into practice.
Figures 1, 2, 3, 4, 5 show several arrangements in which two movable inductors
are used.
Figures 6,
inductors.
and 8 also show the mechanism provided with two movable
Figures 9, 10 and 11 show an arrangement wherein only a single movable
inductor is used.
Figures 12 and 13 show the movable inductor. of a machine having a single
inductor, the armature of which is formed by two crowns as represented in
Figures 14, 15, 16 and 17.
Figures 18, 19, 20 and 21 show in detail the arrangement of the coils of the
armature.
In a machine having a single movable inductor the inductor is multipolar, and
presents the form of an internally toothed wheel 4. Around all the teeth or polar
projections are placed coils of wire all connected for tension, and the current passes
through them in such a manner that it will alternately produce poles. The two
extremities of the wires communicate with two rings fixed upon the nave or axle of
the inductor. The current of the exciting machine is conducted to these two rings
through two brushes placed upon the fixed armature.
In Figures 14, 15, 16 and 17 the armature is formed of two crowns 3, one being

page_text: provided with arms (Figures 14 and 15) and the other being without arms
(Figures 16 and 17). These crowns are cast and connected with each other by
means of bolts 2, the whole forming a drum. Between the two crowns and upon
the periphery are placed sheets of iron 18 (see Figures 20 and 21) in the form of
disc seginents and placed together in such a manner that they form a great number
of closed magnetic circuits.
Referring to Figures 18, 19, 20 and 21, upon the drum thus made are fixed the
armature coils 14 as shown in Figure 21, parallel with the axis, these coils are
made of thin copper bands wound upon a core having a special form in order to
obviate any eddy currents.
The core of the coil 14, has the form of a hollow rectangle rounded at the
corners, the periphery being furnished with a channel or groove 25 which holds
the wire in its place. The interior part of the core is hollowed out, as shown in
Figure 18, one of the extremities being slit at 1 and an insulating strip placed
therein for preventing the circulation of wasteful induced current. Each coil is
independent of the others and the connections are external. The coils are held
upon the periphery of the crown by means of screws 16 which pass through nuts 5,
Figure 20 set in sulphur and situated in the lugs of the two cast iron crowns.
The fixed armature can be very easily withdrawn from the machine without
dismounting any of the parts.
For this purpose, as shown in Figures 9, 10 and 11, the nave 13 of the armature
is fitted upon the tubular extension B forming part of the cast iron pedestal A.
The said pedestal is provided on each side with a lug 6 which is provided with a
hole in which are arranged two nuts or sleeves carrying pinions 11 and 12, the said
two pinions gearing simultaneously with a toothed wheel 8 which is turned by
means of a crank or handle. Two screws 6 and 7 fixed upon the arms of one of
the crowns of the armature engage with the aforesaid nuts. It will thus be readily
understood that in order to withdraw the armature it is sufficient to turn the toothed
wheel 8 by means of the crank or handle thereon.
Besides this movement I may cause the armature to turn upon the cast iron
extension B; it is sufficient for this purpose to loosen the two screws, which takes
place automatically as soon as the armature is withdrawn, if the turning is con-
tinued. As the armature can thus be turned upon its axis it is easy to gain access
to, and clean all the coils.
When I construct a machine with two movable inductors I prefer to replace the
crown of soft iron wbich is used in the preceding arrangement below the induced
coils by a second movable inductor B* of the same kind as the first inductor 4
and turning together with it. From this it results that the coils connected with
cach other form a crown situated between two toothed inductors which turn with
the shaft of the steam engine.
The two movable inductors may be connected upon the same crown C in order
to facilitate the mounting of the same (Figures 2 and 7). They are formed by
two wheels, one toothed inside and the other outside so that the unlike poles
shall be opposite and the poles shall be alternately north and south for each
inductor. The coils of the armature are immovable and fixed upon a cast iron
crown D, being carefully insulated from the same see Figure 7.
The inductors may also take other forms as shown in Figures 3 and 4 in which
a single crown is provided with coils and has poles of a certain length; or
having simple projections E E' which are comparatively short and serve to direct
the flow of the current.
In all the arrangements the armature is movable and can be easily withdrawn
from the machine without the necessity of dismounting any part.
The machine may be double and composed of two groups of inductors already
described, (Figure 5), the coils of the armature being fixed in the middle upon
a circular crown. The dismounting of the machine is in this case effected by
withdrawing one inductor from one side and the other inductor from the other.

page_text: Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is
First. In an alternating current electric machine arranged upon the shaft of a
steam engine in place of a fly wheel, an armature formed by two crowns and
provided with coils formed by bands of thin copper wound upon a core having
the form of a rectangle 'rounded at the corners, the said armature being fixed
and capable of removal from its position at will in order to repair the machine
when necessary.
Second. A movable multipolar inductor mounted directly upon the shaft of the
steam engine, the said inductor presenting the form of a wheel provided with
teeth or projections on the inner side of the rim round which teeth are placed
coils of wire all connected for tension.
Third. The employment, in combination with an armature formed by a single
crown, of two movable inductors adapted to be arranged upon a single crown or
upon two different crowns mounted upon the shaft of the engine and so arranged
that the unlike poles are opposite one another and that the poles shall be alternately
positive or negative to each inductor.
Fourth. The employment, in combination with an armature formed by a single
crown, of two movable inductors, only one of which is provided with coils, the
other having in this case short projections only for directing the flow of the
current.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.