Improvements relating to Electric Motors.
Year: 1891

page_text: Date of Application, 16th Oct., 1891-Accepted, 9th Jan., 1892
COMPLETE SIMULTICATION.
Improvements relating to Electric Motors.
1, OLOF LINDERS of No. 5 Trädgårdsgatan Gothenburg, in the Kingdom of
Sweden, Engineer, do hereby declare the nature of this invention and in what manner
the same is to be performed, to be particularly described and ascertained in and
by the following statement :-
This invention relates to an electric motor provided with means by which the
said motor may be suspended in such a manner that it may be swung around itself
in a vertical plane.
This arrangement may be used for an electro motor of any construction but it is
particularly applicable to the kind of motor hereinafter described and shown in the
accompanying drawing in which
Figure 1 is a side view of the motor.
Figure 2 is an end view of the same partly in section, and
Figures 3 and 4 represent modifications of the said motor.
The motor has its field magnets cast in one piece, the exterior of which con-
stitutes the body or frame of the said motor, the said frame is made in the shape of
At the sides or ends of the
a ring a supporting the bearings of the armature b.
body a which ends are at right angles to the shaft of the armature, are arranged
trunnions c by means of which the motor is suspended in a fork shaped device or
carriage, or in fixed bearings so that the motor is pivoted upon these trunnions.
The said trunnions c can be placed concentric with the armature shaft, in which
case the latter does not change position when the motor is rotated or the said
trunnions may be arranged eccentrically to and parallel with the armature shaft, so
that the said shaft when turning the motor, moves in a circle around the said
trunnions. The said trunnions may be made either solid or hollow as desired.
In some instances it may be desirable to provide the motor with a trunnion or
shaft at one end only, as indicated by dotted lines in Figure 1, and to fit the said
trunnion into a bearing of suitable strength, so that the motor can rotate in the
same way as hereinbefore stated.
In some cases it may be inconvenient to have the trunnions projecting from the
ends of the frame as above described as for instance when the motor is to be turned
in the horizontal plane. In such cases I provide other means for effecting the same
object as hereinafter described.
Figure 3 is a side view, and
Figure 4 is an end view of a motor provided with a modified form of trunnions
or pivots.
In order to suspend the motor it is provided at each end with a disc or ring-
shaped trunnion & formed on the end of the frame a. These discs or trunnions may
be arranged either concentrically or eccentrically with respect to the armature
shaft and formed in one piece with the frame or body a, or they may be separately
fixed to the ends of the said frame. The said discs or trunnions may be arranged
nearer the middle of the motor and some distance from each other in the form of
rings e as shown by dotted lines in Figures 3 and 4 of the drawing. By means of
these rings e the motor can be suspended or it may be supported in a suspended or
fixed bearing in which the motor can turn. In the latter case the rings or trunnions
may be compared with cams on a shaft which cams run in bearings.
The said rings or trunnions when located nearer to the centre of the motor may
be either cast in one piece with the frame or separately fixed to the same.
Instead of fixing the trunnions to the motor, the ends of the latter may be
provided with holes or sockets adapted to receive the trunnions which may be

page_text: formed on the fork for other device for supporting the motor as shown by dotted
lines in Figure 3.
The motor is supported in suitable bearings, so as to be capable of turning in the
vertical plane in maintaining the horizontal position of the armature. A motor
arranged in this way can easily be adapted to the position most convenient for
performing any desired work, and is therefore of great practical utility.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
First. In electric motors, the arrangement of pivots or trunnions fixed outside
the ends of the frame which are at right angles to the shaft of the armature, the
axis of the said trunnions or shafts being parallel with the shaft of the armature so
that when the motor is suspended on these pivots or trunnions the said motor may
swing on the same without changing the horizontal position of the shaft of the
armature.
Second. The modified arrangement of motor in which instead of using projecting
end pivots or trunnions the ends of the frame or body, which is at right angles to
the shaft of the armature, are made in the form of a disc or ring, or in which rings
or belts are formed around the frame or body so that the ends of the latter may
constitute pivots or trunnions by which the motor may be supported or suspended
in a suitable frame or suspension device.
Third. The modified arrangements in which the frame or body, in lieu of pivots
at the ends, is provided with holes or sockets for receiving the pivots or trunnions
on the fork or frame supporting the motor.
Dated this 16th day of October 1891.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, Agents for the Applicant.