Improved Direct Coupled Driving Arrangement for Electric Automotors.
Year: 1898

page_text: Date of Application, 31st Dec., 1898
Complete Specification Left, 29th Sept, 1899-Accepted, 4th Nov.,
1898
Improved Direct Coupled Driving Arrangement for Electric
Automotors.
I, ERNST EGGER, of 187, Simmeringerstrasse, Vienna, in the Empire of
Austria-Hungary, Engineer, do hereby declare the nature of this invention to
be as follows:-
The object of this invention is to provide an improved driving arrangement
for electric automotors
In the arrangements hither to existing, the transmission of power from the single
motor, or of the two motors to the wheels, 18 effected by means of mechanical
gearing, which had many disadvantages, one of which is that, if any one of the
many parts of the gearing becomes damaged, the whole driving arrangement is
rendered unserviceable.
In the arrangement forming the object of this invention, all gearing is dis-
pensed with and the driving 18 effected direct from the electro motor to the
wheel coupled therewith
A distinguished feature of this invention is that the magnetic field of the
electro motor 18 attached to the frame of the vehicle, or to the firmly seated
wheel axle, whilst the rotary armature is connected with the wheel that rotates
on the axle-tree.
In the accompanying drawings, Fig 1 is a front elevation of the two driving
wheels of a vehicle showing the application of two motors thereto, and Fig 2
18 an end elevation of the same
"The motor frame A of circular shape and bearing the electro-magnets a
is fixed to the wheel axle B, which is firmly connected to the vehicle in the
usual manner
The motor armature C projects centrally into the unfilled bell-shape space of
the magnetic field.
This armature C is firmly screwed to the hub of the wheel E which rotates
on the axle D.
The same arrangement is made at each end of the wheel axle B.
The supply of current to the collector F 18 effected as desired and in the usual
manner for each of the two electro motors independently of each other in such
a manner that the number of their rotations adjusts itself without constraint
while the vehicle is running on a curve.
It will be seen without further explanation, that a motor so directly coupled
could also be aanged at one end only of the axle B; in this case the driving
of the wheel is effected in the ordinary known manner by means of differential
gear, which allows of the necessary different rates of rotation of the two wheels
at curves.
Further, without in any way altering the principle on which the invention
is based, an inner-pole or flat-ring electro motor can be employed instead of the
outer-pole motor; moreover, as distinguished from the arrangement illustrated
by way of example, the armature C may be connected with the fixed axle B

page_text: and the magnetic field and the frame A with the wheel E either, as represented,
by screwing to the hub or by means of some flexible coupling such as 18 generally
known in connection with the construction of dynamos
Foi braking, a band biake can be advantageously employed, the brake wheel f
of which is attached to the rotating part of the electro motor, and its band ƒª§
and lever mechanism f to the fixed part of the same
Dated this 31st day of December 1898.
WHEATLEY & MACKENZIE,
40, Chancery Lane, London, W.C., Agents.
Improved Direct Coupled Driving Arrangement for Electric
Automotors.
I, ERNST EGGER, of 187, Simmeringeistrasse, Vienna, in the Empire of
Austria, Engineer, do hereby declare the nature of this invention and in what
manner the same 18 to be performed to be particularly described and ascertained
in and by the following statement ·-
The object of this invention is to provide an improved driving arrangement
for electric automotors
In the arrangements hitherto existing, the transmission of power from the single
motor, or of the two motors to the wheels, 18 effected by means of mechanical
geaning, which has many disadvantages, one of which 18 that, if any one of the
many parts of the gearing becomes damaged, the whole driving arrangement 18
rendered unserviceable
In the arrangement forming the object of this invention all gearing is dis-
pensed with and the driving is effected direct from the electromotor to the
wheel coupled therewith.
A distinguishing feature of this invention is that the magnetic field of the
electromotors 18 attached to the frame of the vehicle, or to the firmly seated
wheel axle, whilst the rotary armature is connected with the wheel that rotates
on the axle-tree
In the drawings filed with the Provisional Specification Fig. 1 18 a front
elevation of the two driving wheels of a vehicle showing the application of two
motors thereto, and Fig. 2 is an end elevation of the same
The motor frame A of circular shape and bearing the electro-magnets a
is fixed to the wheel axle B, which 18 firmly connected to the vehicle in the
usual manner
The motor armature C projects centrally into the unfilled bell-shape space of
the magnetic field.
The amature C is firmly screwed to the hub e of the wheel E which rotates
on the axle ]).
The same arrangement is made at each end of the wheel axle B.
The supply of current to the collector F is effected as desired and in the usual
manner for each of the two electromotors independently of each other in such
a manner that the number of their rotations adjusts itself without constraint
while the vehicle is running on a cuive
It will be seen without further explanation that a motor so directly coupled
could also be arranged at one end only of the axle B; in this case the driving
of the wheel is effected in the ordinary known manner by means of differential
gear, which allows of the necessary different rates of rotation of the two wheels
at curves.

page_text: Further, without in any way altering the principle on which the invention
is based, an inner-pole or flat-ring electromotor can be employed instead of the
outer-pole motol, moreover as distinguished from the arrangement illustrated
by way of example, the armature C may be connected with the fixed axle B
and the magnetic field and the frame A with the wheel E either, as represented,
by screwing to the hub or by means of some flexible coupling such as 18 generally
known in connection with the construction of dynamos
For braking, a band brake can be advantageously employed, the brake wheel
of which is attached to the rotating part of the electric motor, and its band
and lever mechanism to the fixed part of the same.
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 18 -
1. Direct coupled driving arrangement for electro-motors, the distinguishing
feature of which is that the magnetic field or frame A of the electromotor is
attached to the fixed wheel-axle B or to the frame of the vehicle and the arma-
ture C of the electromotor connected with the wheel E of the vehicle or vice
versa
2 In diving arrangements as distinguished under Claim 1, the arrangement
of a band-biake, the brake-wheel f of which 18 attached to the rotary parts of
the electio-motor and its band ft and lever mechanism to the frame of the
vehicle.
Bandh: 00th 1
1000