Improvements in Electric Motors.
Year: 1891

page_text: Date of Application, 16th Oct., 1891-Accepted, 9th Jan., 1892
Improvements in Electric Motors.
I, 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 electric motors and has for its object to simplify the
construction of the same so that they may be manufactured at a cheaper rate than
heretofore.
In the accompanying drawings
Figure 1 is a side elevation of the improved motor and
Figures 2 and 3 are end views thereof.
The improved motor comprises an oblong frame or ring a cast in one piece
which constitutes the magnetic circuit, the cores of the magnet being united with
the said frame or ring or formed in one piece therewith. At the ends the said
frame or ring a has cylindrical openings for receiving the bearings c for the armature
shaft d situated in the plane of the ring and passing diametrically through the
same. One of the said openings is made of such a size as to allow the armature f
to be introduced through the same for fixing the said armature in position. Plugs
or caps h are screwed into the bearings for the purpose of supporting the shaft
against displacement and for adjusting the said shaft in the longitudinal direction.
These plugs can be tightened by means of set screws which pass through flanges
or ears on the plugs and can be screwed against the end of the bearing.
The said plugs or caps also serve as lubricators, the oil being introduced into
them through holes which are closed by screws i. The bottom of the lubricator
thus formed is provided with channels or grooves which communicate with the
grooves l, m, n and o in the bearings. In one of the said grooves, preferably the middle
one, m, is provided a ring of india-rubber n' or a chain, for the purpose of drawing
up the oil from the lower part of the said groove where it is constantly collecting
and lubricating the upper part of the shaft during the rotary motion of the same.
The grooves may be all of the same diameter and a ring arranged in each.
The power is transmitted from the armature shaft by means of a worm
gears with a worm wheel p arranged in an aperture in the frame a. A shaft ris
supported in bearings in the frame to which motion is transmitted by means of any
suitable gearing from the shaft of the worm wheel or the power can be transmitted
direct from the shaft of the worm wheel. The motor is arranged upon a suitable
plates or suspended by means of a ring t screwed into the frame.
which
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 an electric motor the arrangement of the magnetic circuit which
constitutes at the same time the frame of the machine and of a single piece or
casting of oblong or circular form, the said frame being provided at the ends with
cylindrical openings for receiving the bearings for the shaft of the armature
arranged in the plane of the said frame and passing diametrically through the
same.
Second. In an electric motor in combination with the arrangement indicated in
Claim 1, the arrangement of a worm wheel with a worm, on the shaft of the
armature, the said worm wheel being arranged in the plane of the frame and in
an opening in the said frame and the said armature being supported in bearings
in the said frame.

page_text: Third. In an electric motor as indicated in Claim 1, the arrangement at each
end of the armature shaft for conducting oil to the journal of the said shaft, which
consists of an oil reservoir / screwed into the bearing and enclosing the end of the
shaft which reservoir communicates by means of channels or grooves and with
annular recesses l m and n formed in the bearing in which recesses are arranged
rings n suspended on the shaft for feeding the oil to the shaft when the said shaft
is rotating, the said oil reservoir being provided at its centre with a hole closed by
a screw or the like for the purpose of supplying oil to the reservoir without having
to remove the same from the bearing.
Dated this 16th day of October 1891
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, Agents for the Applicant.