Improvements in Continuous Current Generator Dynamos or Motor Dynamos.
Year: 1895

page_text: Date of Application, 16th Dec., 1895-Accepted, 25th Jan., 1896
COMPLETE SPECIFICATION.
Improvements in Continuous Current Generator Dynamos or Motor
Dynamos.
We, ALBERT DE PUYDT, and MAXIMILIEN PONCIN, both of 16 Rue de
Rénory, Angleur, Belgium, Engineers, 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 :-
This invention relates to certain improvements in continuous current generator
dynamos or motor dynamos.
In two-pole dynamos as at present constructed the pole-pieces of the field-magnet
This
are arranged opposite two extremities of a diameter of the armature.
invention has for its principal object the division into several parts of one or both
of the pole-pieces of the field-magnet.
In carrying out our invention we adopt the construction and arrangement herein-
after described with reference to the accompanying drawings upon which,-
Figures 1, 2, 3, 4, 5 and 6 are sectional views of an armature through its axis.
Figures 1 and 2 represent arrangements in which both the pole-pieces of the
magnet are divided into two parts, which are arranged outside the armature in
Figure 1, and inside the same in Figure 2.
Figures 3 and 4 represent arrangements in which only one of the pole-pieces of
the magnet is divided into two parts, and placed outside the armature in Figure 3,
and inside it in Fig. 4.
Figure 5 shows the arrangement of a disc armature and magnet having one of its
pole-pieces divided.
Figure 5 being a section of the same through line A-B.
Figure 6 is a modification of the arrangement shewn in Figure 3 wherein one
pole-piece of the magnet instead of being divided is extended around the greater
portion of the periphery of the armature.
Figures 7 and 8 are respectively end and side views of a dynamo constructed on
the system illustrated in Fig. 3;-
Figures 9 and 10 being similar views of a modification of the same.
The construction of a dynamo on the systems illustrated in Figures 1, 2, 4, 5, 5*
and 6 will be sufficiently clear without further drawings.
In all the figures, whether the pole-piece is divided or not, N indicates the north
pole of the magnet and S the south pole.
The arrangements shewn in Figs. 1 and 2 are used only with supplementary
brushes a, whereby one section of the armature I is placed in short circuit; the
outer circuit being connected with brushes c.
In the other arrangements the supplementary brushes a may be dispensed with.
As shewn on Figs. 7 to 10 the pole-piece N is formed in a single piece, whilst
the pole-piece S is divided into two parts arranged on either side of the
armature I. All the other parts of the dynamo may be of any ordinary
construction.
The field-magnets M are supported by feet P upon a suitable pedestal L, a
non-magnetic metallic piece Q being interposed between the pole-pieces S and
feet P, as shewn in Figs. 7 and 8.
In Figures 9 and 10 the non-magnetic piece is suppressed and the magnets M are
supported by their breech or cross-bar C resting directly upon upward extensions E
of the bearings of the shaft.

page_text: In Figures 7 to 10 only the pole-piece S is divided, and both the pole-picces S
and N are placed outside the armature. We
Te may however with equal advantage
arrange the pole-pieces within the armature whether they are both divided as in
Figure 2, or only one is divided as shewn in Fig. 4.
Instead of forming the armature coils by windings of a single wire, we may
employ cables of several wires twisted together, as already known, for that
.purpose.
Having now particularly described, and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
-claim is :-
:-
1. In continuous-current generator dynamos, or motor-dynamos, the sub-division
of one or both of the pole-pieces S. N. of the field-magnet, and their arrangement
outside or inside the armature I, in combination or not with supplementary
brushes a connecting one section of the armature with a short circuit, for the
purpose of diminishing the reaction or electrical resistance of the armature as
.described.
2. In continuous-current generator dynamos, or motor-dynamos, the extension of
one of the pole-pieces S or N of the field-magnet around the armature I for the
greater portion of its periphery, for the purposes and as described with reference
to Figure 6 of the accompanying drawings.
3. In continuous-current generator dynamos or motor-lynamos, the use in
combination with divided pole-pieces of a magnet,-arranged either outside or
inside an armature furnished or not with short circuit brushes,-of a wire cable
wound upon the armature, as and for the purposes described.
4. In continuous-current generator dynamos or motor-dynamos, the combination
with divided magnet pole-pieces S N arranged internally or externally to an
armature 1, of field-magnets M supported by their breech C in bearings E
extending upward from the shaft-bearings, as described with reference to
Figures 9 and 10 of the accompanying drawings.
Dated this Sixteenth day of December 1895.