Improvements in Dynamo Machines.
Year: 1890

page_text: Date of Application, 18th Jan., 1890-Accepted, 22nd Feb., 1890
COMPLETE SPECIFICATION.
Improvements in Dynamo Machines.
I WALTER THOMPSON of Dresden, Germany, Engineer, do hereby declare the nature
of my invention for IMPROVEMENTS IN DYNAMO MACHINES and in what manner the
same is to be performed, to be particulary described and ascertained in and by the
following statement :-
The object of this invention is to effectually and in a simple manner secure a perfect
and reliable dynamo machine without commutator or brushes, to increase the efficiency
and to reduce the running expences of the same.
The invention consists in the improved dynamo machine and in the arrangements
and combinations of parts thereof substantially as will be hereinafter more fully set
forth and finally embodied in the clauses of the claim.
Referring to the accompanying drawing in which like letters of reference indicate
corresponding parts in each of the several figures:
Fig. 1 is a front elevation of my improved dynamo and
Fig. 2 is a section through a y in fig. 1.
"
In said drawing A indicates the bedplate on which the supports B, B1, are secured.
C is the shaft of the armature, which consists of four electric magnets H, H¹, H², H³,
which are wound in such a manner, so that two opposite magnets are North" and the
other two "South" poles. The ends of the wires, being properly insulated, are brought
through the hollow shaft to the metalic plugs D, D₁ which are also insulated from
the shaft by insulating bushings E, E¹.
In these plugs D, D¹ slight metalic cones F, F, which are secured on springs G, G¹,
Plugs D, D, and cones F, F form a continuous contact. On the shaft Care secured
pulley a, and gear wheel 6, which latter meshes in gear wheel c, revolving on shaft d. To
wheel c is secured a connecting arm i by means of which the field magnets K, K¹ are
made to oscillate. The magnets K, K' are connected by means of two or more soft
iron bars h, h¹, secured to cross bar g, and supported by standards f, f.
The whole is oscillated on bearings e, e¹, by means of the arm i. The fields form
opposite poles as in an ordinary dynamo.
The connections are made as follows:
From field K, wire e, field K¹, through wire m, to spring G₁, cone F¹, plug D¹,
through the armature to plug D, cone F, spring G, to outre curcuit and back to
field K.
The current is generated by the quick approaching and receding of the armature to
the fields and vice verse.
I do not intend to limit myself to the construction shown and described, as various
changes can be made, without changing the scope of my invention.
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. The improved dynamo, combining therein a revolving armature, consisting of 4
or more elect. magnets, and two or more oscillating field magnets as shown and described
and for the purpose set forth.
2. The improved dynamo, combining therein an armature, revolving on a shaft with
insulated metalic plugs, corresponding cones on metalic springs, oscillating field
magnets as shown and described and for the purpose set forth.

page_text: 3. The improved dynamo, combining therein an armature revolving on a shaft,
carrying a gear wheel which transmitts its movement to a second gear wheel, con-
nected by an arm with the field magnets and by which motion the fields are made to
oscillate as described and for the purpose set forth.
London 18th Tanu 1800