Improvements in Electro Motors for Electrically Propelled Vehicles.
Year: 1892

page_text: Date of Application, 27th Jan., 18:2
Complete Specification Left, 30th Sept., 1892-Accepted, 5th Nov., 1892
PROVISIONAL SPECIFICATION.
Improvements in Electro Motors for Electrically Propelled
Vehicles.
I, ALEXANDER SIEMENS, of 12 Queen Anne's Gate, Westminster, in the
County of Middlesex, Civil Engineer, do hereby declare the nature of this inven-
tion to be as follows:
-
In electro motors for electrically propelled vehicles in which the armature is
almost entirely surrounded by the curved pole pieces of the field magnets, there is
great difficulty, more particularly when the motor is of a large size, of gaining
access to the armature or of removing it.
My present invention has for its object to obviate this disadvantage by arranging
the pole pieces either partially or wholly separate from the limbs of the field
magnets and so that they can be removed in order to gain access to the armature,
and to facilitate the removal of the latter.
For this purpose, I make each pole piece in two separate parts, the one part
which surrounds the inner half of the armature being fixed rigidly to the field
magnet or forining part of it while the other part which surrounds the outer half of
the armature is connected to the first named part by an outside hinge joint, so that
when required it can be turned back upon such hinge joint and thus leave the outer
part of the armature exposed.
For securing the said hinged parts in the position surrounding the armature,
they may either.have. screw bolts passing through them and screwing into the
fixed part, or they may be secured by other suitable fastenings.
In this arrangement when the armature is fixed directly on the axle of the
running wheels, while the field magnets are fixed to the framing of the vehicle,
the opening formed by the curved pole pieces may be made slightly oval or elon-
gated in tlie vertical direction, so as to allow of a certain amount of vertical play
of the armature between them.
Dotel this 27th d...
1800
ABEL & IMRAY,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Electro Motors for Electrically Propelled
Vehicles.
I, ALEXANDER SIEMENS, of 12 Queen Anne's Gate, Westminster, in the
County of Middlesex, Civil Engineer, do hereby declare the nature of this inven-
tion and in what manner the same is to be performed to be particularly described
and ascertained in and by the following statement :-
In electro motors for electrically propelled vehicles in which the armature is
almost entirely surrounded by the curved pole pieces of the field magnets, there is
great difficulty, more particularly when the motor is of a large size, in gaining
access to the armature or in removing it.
My present invention has for its object to obviate this disadvantage by arranging
the pole pieces partially separate from the limbs of the field magnets, and so that
they can be removed in order to gain access to the armature, and to facilitate its
removal.
For this purpose, I make each pole piece in two separate parts, the one part
rigidly fixed to the field magnet or forming part of it, and the other part jointed

page_text: to the fixed part by a hinge, so that, when required, it can be turned back upon
its hinge joint and thus leave half of the armature exposed.
For securing the hinged parts in their working position surrounding the
armature, they may have screw bolts passing through them into the fixed parts, or
they may be secured by other suitable fastenings.
When the armature.is fixed directly on the axle of the running wheels, while
the field magnets are fixed to the framing of the vehicle, the opening formed by
the curved pole. pieces may be made slightly oval or elongated in the vertical
direction, so as to allow a certain amount of vertical play of the armature between
them.
The accompanying drawing is a side view of part of an electric locomotive
having the armature A of the motor fixed on the driving axle. FF is the field
magnet having the upper parts P P of the pole pieces integral with its cores, but
the lower parts p p are made separate and are hinged at Q Q', being, when in
working position, fastened to P P by screws S S' or otherwise.
On undoing the fastenings, the parts p p can be turned down on their hinges,
as indicated by the dotted lines giving access to the armature A, which along with
the axle and driving wheels can be removed through the gap left open below.
When the armature is not fixed on the driving axle but is mounted in some other
position in the vehicle, the pole pieces may be similarly divided; so that the hinged
parts can be folded back at the side of the motor where it is most convenient or
desirable to obtain access to the armature.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
:
In electro motors for propelling vehicles, making each of the pole pieces of the
field magnets in parts, the one part hinged, substantially as and for the purpose
set forth.
Dated this 30th day of September 1892.
ABEL & IMRAY,
Agents for the Applicant.