A NEW OR IMPROVED AUTO-MAGNETIC MOTOR
Year: 1886

page_text: We, E. DELABRE-FOURNIER, of 8, rue de la Chaussée d'Antin, Paris, France,
Machinist do hereby declare the nature of our invention for A NEW OR IMPROVED
AUTO-MAGNETIC MOTOR 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 our invention is to utilize the attractive force of magnets in motors
of any kind.
Magnets have not hitherto been used in manufactories to produce power, inasmuch
as whilst they possess an attractive force, they exercise a very great adherent force
which latter makes them unsuitable for to and fro motions. The basis of our
invention is therefore to break the adherent and attractive force instantaneously
and temporarily and to restore the attractive force instantaneously.
For this purpo
pon the two principal faces of a magnet, we apply, in contact,
two soft iron plates, dipped in a bath, acidulated either by azotic, chlorhydric, or
other acid, both plates being covered, on the side facing the magnet, with a slight
perforated coating of copper. By this arrangement of copper coatings and the
dipping of the soft iron plates, the latter may easily be drawn away from contact
with the magnet. When the contact of these two plates with the magnet takes
place, the magnetic fluid of the multiple magnets is immediately interrupted, and
the instant the plates are drawn away, the magnet recovers its attractive force.
Consequently, it is evident that a to and fro motion may thus be easily obtained
by using the attractive power of the magnet to attract an iron weight or piston,
and then leaving the same to itself by breaking the magnetic current through the
application of the two plates above mentioned.
In order to make the mechanical application of our invention more clearly
understood, we have annexed to this specification a drawing representing a motor
worked by magnets. The power of such motors will be in proportion to the size
of the magnetic apparatuses, motors of 1 or more borse power, as also smaller ones
of limited power may be constructed. The following is a full description of the
construction of the motor; generally speaking, there must be neither iron, cast or
wrought, nor steel, within 10 or 12 inches of the magnetic apparatuses, copper
being used instead of iron for all parts except the piston and plates. The motor
rests upon a cast metal or other suitable frame. A A and A, A₁ are multiple
magnets. B B and B₁ B₁ are pistons with copper rods. C C and C, C₁ are

page_text: small fly wheels. These fly wheels are connected with the wheels E E by copper
connecting rods D D fixed to their outer faces by means of pins. The wheels E E
and e e are connected by rods working from the middle of their shafts, on which
shafts are placed cranks or excentric contrivances which bring near and remove
the iron plates F F (previously dipped in acid as above and the inner face of each
plate having a slight coating of copper) from the multiple magnets, thus breaking
the force of the apparatus as soon as the piston fixed to a crank I touches the
magnets. It is upon the shafts K K of these cranks that the motive power is
produced. These two shafts are regulated in their movements by the cog wheels J J
gearing with the wheels E E which are themselves connected with the small fly
wheels upon the shafts K K. The multiple magnet of a motor of 2 horse power
attracts from a distance of about 2 or 2 inches according to the degree of their
magnetic power and the quality of the apparatuses. The stroke of the piston is
twice the length of the attractive distance, as will be seen from the drawing.
The magnets are coupled together in their attractive action in such manner that
when the interruption takes place in the couple A, A₁, the attractive power acts
upon the other couple A A, thus causing the alternation of a to and fro motion.
Upon the prolongation of the shaft L of the wheels J J is fixed the large fly wheel,
which being slightly turned by hand, sets the whole machine going.
To stop the machine, all that is necessary is to put the wheels J J out of gear
with the wheels E E, upon which the 2 shafts K K, not working together, come
to a stop.
Having now particularly described and ascertained the nature of our said
invention, and in what manner the same is to be performed, we declare that what
we claim is :
1. The new process above described, by which the attractive and adherent power
of magnets may be instantaneously interrupted and restored.
2. The application of such process to machines driven by motive power of what-
ever kind.
3. The above described motor.