IMPROVEMENTS IN MAGNETO OR DYNAMO ELECTRIC MACHINES
Year: 1884

page_text: I, JOHN RILEY, of Riddings, Alfreton, Derbyshire Engineer and Electrician do
hereby declare the nature of my Invention for IMPROVEMENTS IN MAGNETO OR
DYNAMO ELECTRIC MACHINES, to be as follows :-
First. The construction and use of annular metal armatures with projections on
both sides and separated from each other, except through the said annular
armature.
Second. The method I join up, I couple together, or, use disconnectedly, coils of
insulated copper wire, which 1 wind or put around these projections, as well as
around sections of the annular metal armature-untill I have filled up, and utilised
much angular space which is lost in other machines, and which often causes too
great a body of inetal.
Also in construction and use of comutators of mictal and in the method of
attaching the metalic wearing segments.
The method of winding the armature is this
I commence in the centre of two opposito projections, as in Fig. 6. 7. & 8. and
wind one side right and the other left handed-untill cach, are filled level with the
flanges and continuing this untill each pair have been filled-having then an
armature ready for coiling in the well known manner and having utilised much
angular space which is lost in others.
I then coil right-handly around each section of the annular armature untill
nearly level with the flanges, after which I join the two methods of coiling
together as in Fig. 6. A. A. being taken to the comutator.
Or-as in Fig. 7. A. 1. to comutator whilst B. is joined to its opposite.
Or as in Fig. 8. when each method of coiling is brought off in the usual form
to its own comutator C. 1. or C. 2. in Fig. 1.
in
In the construction of my comutator I first make an annular metal body-then
I drill holes of about equally divided around this ring or body-but cach
alternately to the right or left of the centre (length) to avoid confusion of holes.
These holes I fill by screwing in, vulcanized fibra and in the centre of each.
I again drill and tap, smaller holes for the reception of the screws which securo the
wearing metal segments which segments I also insulate from the annular iron
body with varnishod paper or other insulating materials.
Dated this Sixteenth day of January One thousand eight hundred and eighty

page_text: I JOHN RILEY, of Riddings, Alfreton, in the County of Derby, Engineer, and
Electrician, do hereby declare the nature of my Invention for IMPROVEMENTS IN
MAGNETO OR DYNAMO ELECTRIC MACHINES and in what manner the same is to
be performed, to be particularly described and ascertained in and by the following
statement, the novel features being within the three following divisions:―
First. A peculiar and compound form of revolving armature.
It is well known that of all ring armatures the inner circumference is less than
the outer one-honce-when these armatures are wrapped, the inner circles are
full, whilst angular spaces lead up to the outer one.
The new feature in my armaturo is the utilisation of all spaces-both angular,
and parallel. And to attain this-I first make provision for a certain number of
parallel coils around the ring or body of the armature, J is shown in the present
case and this leaves as many angular spaces. Out of these angular spaces, and on
each side, angular arms project from the centre, and at the end of these angular
projections I make angular flanges or pole plates-nearly equal to the base out
of which these projections spring.
Second. A peculiar and compound winding of the armature-containing the two
following-
1st I commence to coil with insulated wire in the centre of each pair of
projections coiling one side right handed, and the other side left handed-and so
build up until each projection is filled up to its flange level.
This forms an advantageous backing for the second winding-or parallel coils to
rest against-and-while retaining only a sufficient body of iron in these pro-
jections for the polarisation of the ring or armature-1 utilise the angular spaces
without loss of pole face.
2nd I then fill the parallel spaces around the body of the armature-until nearly
level with the pole faces, coiling preferably-right handed.
The angular coils-aud the parallel ones may now be joined together-and led
in the usual form to the commutator-or if more advantageous-they may be kept
apart and brought off at different receiving points.
Third. A novel method of attaching-detachable wearing metal segments to the
commutator body.
in
I first make an annular metal body-then drill holes of about 1/4" diameter-
equally divided around the ring or body-but each alternately to the right or
left of centre length to avoid confusion of holes. These holes I fill-by screwing
in vulcanize fibre-and in the centre of each-again drill and tap smaller holes
for the reception of screws-which secure the wearing metal segments. These
seguents I also insulato from the annular iron body-with varnished paper-or
other insulating material.
The Drawing hereinafter referred to is that filod with my Provisional

page_text: Fig. 1. shows one view of general and convenient form of the combined machine-
M. M. being the elongated bobbins-joined by bolts to uprights-and face plates.
The uprights, forming bearings, the bed-plate, distance plate at top, &c.—will all
be understood by the Drawing.
The armature is seen fixed to its magnetic insulation-this non magnetic metal
being keyed to the shaft or spindle.
The electrical connection between the armature and the commutator is brought
through the hollow spindle-but is not shown.
Commutators C. 1. and C. 2. are shown.
One brush-or wiper is shown-bearing on commutator C. 1. Also the method
or arrangement for moving the same into the desired position.
Fig. 2. shows end view of machine-with bearing-and magnet bobbins-in
dotted lines also face plates partly so.
Fig. 3. shows end view of commutator-with section of insulating plugs-for
the reception of screws that attach the wearing metal segments.
Figs. 4. and 5. show the armature, A. shows the angular projections—and B. tho
body of the armature.
Fig. 6. shows the methods of winding the armature-and joining up, A. A. being
taken to the commutator.
Fig. 7. shows the same methods of winding, but is joined up differently—A. 1. A. 1,
being taken to the commutator-while B. is joined to its opposite diameter.
Fig. 8. shows the two methods of winding-with each winding-kept apart.
Fig. 9. shows a division of magnotic field.
Having now particularly described and ascertained the nature of my said
Invention, and in what manner the same is to be performed-I declare that what
I claim is:-
1. An annular armature consisting of a single solid piece of metal, with
projections on each side, and with pole plates at the outer ends of these projections,
substantially as shown in division number one.
2. An annular armature consisting of one or more plates of iron-forining tho
body of the said armature-with projections-and pole plates-aflixable, sub-
stantially as shown in division number one.
3. An annular armature-with projections on each side, and pole plates on the
outer ends of these projections,-wound with insulated wire-a part being on the
body of the armature; and a part being on the projections, and that these two
methods or windings-be joined together to one commutator, or used separately,
substantially as shown in division number two.
Dated him with Aunun 1001