Improvements in Electro-motors.
Year: 1898

page_text: Improvements in Electro-motors.
I, PAUL ISERLOTH, of 22, Woltmann Strasse, Hamburg, in the German Empire,
Turner, 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 :-
The object of the present invention is an apparatus for utilising the energy of an
electric current for driving a motor, which is simpler and surer in action than the
ordinary electro-motors hitherto employed for the purpose.
The accompanying drawing shews in plan (Figure 1) a form of the invention, a
section (Figure 2) being shewn along the line x-x.
The machine consists of two pairs of electro-magnets a a, a¹ a¹. The two
magnets of each pair are connected in rows in two current circuits. A current is
passed through the two current circuits by means of a dynamo machine which is
not illustrated. The two pairs of electro-magnets lie opposite to one another and
act on mutual armatures b b which have their seat in a cross-head c. The latter is
movably arranged and is guided in a sliding path d. With the pin of the cross-
head engages a forked rod e the other end of which is connected with the crank f
of a shaft g. The shaft g carries a fly-wheel hand transmits its rotary motion in
the desired manner to a transmission shaft or direct to the working engine to be
driven.
The circuit currents of the two pairs of magnets are alternately completed and
interrupted and thereby alternately attract the armature. If for example the circuit
is completed in the magnets a whilst the circuit of the magnets a¹ is interrupted,
the armatures bb will be moved towards the left and thereby the crank ƒ be caused
to rotate. The switching is effected by means of rings i arranged on the shaft g.
These consist, one half of metal, and the other half of insulating material; the
metal halves of the two rings being transposed. The one end of the conduit wire
is attached to the metal contact. On the ring i slides a current diverting brush k
or contact spring, from which the current is guided to the electro-magnet. In con-
sequence of this arrangement the one current circuit is completed during the forward
stroke and the other interrupted. During the passage over the dead point the
current is switched, the first circuit broken and the second completed, so that the
return motion follows.
In order to secure an easy motion for the machine and to facilitate the passage
over the dead point it is desirable to attach a piston k to the back end of the cross-
head, which piston is air-tight and slides in a cylinder closed at both sides. The
air-contents of the cylinder forms an air-buffer which presents a gradually
increasing resistance to the motion of the armature.
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:-
Firstly. An electro-motor consisting of electro-magnets which by means of a
switch i are alternately put in circuit and draw alternately backwards and forwards
a direct guided armature h whorobe the driving aboft

page_text: Secondly. The arrangement of a piston moving in a cylinder and made fast to
the armature b, whereby an elastic air-buffer is formed for securing an easy motion
of the machine.
★ 1 T
y
чу
W. D. ROWLINGSON,
7, Quality Court, Chancery Lane, London, W.C.,
Agent for the Applicant.