Year: 1895

page_text: Date of Application, 22nd Oct., 1895-Accepted, 7th Mar., 1896
which will be better understood by reference to the accompanying drawings, upon
which :-
Figure 1 is a longitudinal section of a dynamo, fitted with our unprovements,
Figure 2 being an end elevation of the same.
Figure 3 is a section, and
Figure 4 an end view of an armature, suitable for small dynamos.
Figme 5 an elevation partly in section of a brush holder:
Figure 6 a plan of the same;
Figure 7 is an elevation and part section of a carbon brush holder, and
Figure 8 a plan of the same.
As shewn on Figures 1 and 2, A B and A' B' are soft steel cores of an electro-
magnet of round section at A and A' to receive separate coils, and expanded at B
and B towards the aimatie I so as to present to it a largely extended surface.
The cores A and A¹ are supported upon and magnetically connected by a soft steel
baseplate C formed in a single piece, to which they are secured by means of screws,
bolts or equivalent devices, and two standards F F are also supported upon and
suitably secured to the baseplate C.
The armature core I is composed of annular iron plates a supported by ribs b.
upon naves d, which ribs and naves form a continuous piece with an outer ring q
arranged on each side of the annular plates a. Separate intermediate keys R
supported by the ribs b keep the plates a in place in the middle of the armature,
without establishing electrical communication between opposite ribs.
To transmit the current from the coils on armature I to the collector L, the
wires from the ends of consecutive coils are soldered together, and each of the
Boldered joints is connected by means of a separate flexible cable or wire J and
screw J to the aims of the collector L,-Fig 1-so that the latter may be readily
disconnected from the armature. The armature core I' in the case of small
dynamos, as shewn on Figs. 3 and 4, is secured upon its axis by means of a key 12
inserted in a groove in the nave before the armature is placed on the shaft, a
col responding groove being made on the shaft, the key 2 is provided at its
extremities with heads 3 which extend over the ends of the nave I 2, and has an
extension 24 which is secured on the shaft after the armature is placed thereon, by
means of sciews : 5.
outer lings
The attachment of the plates of the collector L Fig. 1, is effected by means of
A sleeve m is keyed upon the shaft of the dynamo aud callies on
one end a flange m' provided with a groove in which is inserted an insulating ring n
also furnished with a groove. On the other end of the sleeve is placed a ring m 2
The ends of
likewise grooved and similarly provided with an insulating ing n.
the plates of the collector are inserted in the grooves of the insulating ungs n aud
by and of a nut p screwed upon m, the ung m2 is forced against the flange m 1
suthciently to support the plates

page_text: We also adopt a novel arrangement for oiling the shaft of the dynamos. I
the standards F F we arrange movable oil reservoirs G and II, (Figure 1) inte
wch depend endless chains driven by the shaft which is requned to be oiled
These reservons G H allow of the ready regulation of the quantity of oil which
they contain, without interruption of the oiling.
9
Figures 5 and 6 represent a new form of brush holder. The brush holdei proper N
is arranged movable around an axle g by means of a handle S of which the boss s
revolves around the same axle q, and carries an arms which in its rotation to the
left comes into contact with a projection O of the brush holder and lifts it out of
contact with the collector. A flexible cable or a plate or copper strip electrically
unites the brush holder to its support. A spring secured at one end on the
brush holder N and having the other end adjustable by means of a screw t
arranged in an arm a of the boss s¹, ensures contact of the brush with the collector.
When, after the brush has been lifted, it is desired to fix the brush holder in
position the handle S is screwed so as to piess the koy q' against the axle g
This key is inserted in a longitudinal groove q³ of the axle and in the boss & of
the handle S. The brush holder can also be moved on its axle g along the
longitudinal groove g².
In Figures 7 and 8, representing a carbon brush holder, the brush holder is
formed of two principal parts & arranged in parallel, positions and electrically
connected. The sheath of the carbon is guided in a longitudinal slide of the
part a whereby. it can be moved in any required direction. This sheath is
controlled by a plate spring which tends to hold the brush against the collector L.
The longitudinal travel of the sheath is limited in one duection by a copper
piece of secured on the sheath and into which the end of, the spring is inserted ;
this piece vin its descent rests upon the slide; on the other hand pressure
screws a limit the travel of the sheath in the other direction. The sheath u 19
electrically connected to the 1od by a spring or metallic strip ². To regulate
the pressure of the brush on the collector, and when requned, to break contact
between these two parts, the spring v is at its other end secured upon a split boss or
socket z movable around the axis of 10d x and operated by a handle z¹ which upon
being turned within the socket locks it upon the rod a.
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 claun 18.—
1. In a dynamo, the abs band naves & formed in a piece with the outer ring g, in
combination with insulating pieces R for carrying the plates a as described, with
reference to Figures 1 and 2.
2. In a dynamo, a key for securing the armature, provided with a double
head extending over the nave 12, and with an extension for securing it by
means of screws 25, as described with respect to Figures 3 and 4.
3. In a dynamo the arrangement of a wite or Hexible cable J connecting the
amature coils with a collector, for the purposes and as described
4. In a dynamo, a brush holder composed of two principal parts, of which one s
operated by a handle raises the other N which is held against the collector L by a
spring secured to the part s, whilst a key q' inserted in a longitudinal groove q³
of the axle and in the boss s¹ of the parts, locks the brush in a raised position
and limits its angular movement, as described with reference to Figures 5 and 6.
5. In a dynamo, a brush holder for a carbon brush, consisting of a sheath u
movable in a guide a held against the collector L by the end of a plate spring o
the other end of which is secured to a split boss or socket zari anged on an axis
parallel to the guide a³, and operated by a screwed handle z¹ capable of closing and
opening the split boss z, to adjust the pressure of the brush on the collector and
when required to lift it therefrom as described and illustrated on Figures 7 and 8.
6. In a dynamo a movable drawer or oil reservon G II aanged with each

page_text: of the pedestals F F¹ in combination with endless chains ¹ carried by the shaft
for the purpose of oiling it as described and shewn on Figure 1 of accompanying
drawings.
Dated this Twenty-second day of October 1895.