Year: 1899

page_text: Date of Application (in United Kingdom), 4th May,
1899
I, EUGENIO CANTONO, of 15, Via degli Astalli, Rome, in the Kingdom of Italy,
Captain of Engineers in the Italian Army, do hereby declare the nature of this
invention to be as follows:-
This invention consists in improvements upon an invention for which I have
applied for Letters Patent (to be dated the 12th January 1899) on the 4th May
instant No. 9436.
For the purpose of maintaining at a constant angular velocity the armature of
the small dynamo, operating, not only as a generator of electro-motive force, but
also as a regulator of the speed of transmission of the paper in a Morse receiving
instrument, or kindred apparatus, I, according to this invention, employ, in
addition to the arrangements described in the Specification of my aforesaid
Application, the mechanism hereafter described.
It is contemplated, in the special case in question, to create magnetic deriva-
tions of controllable or variable intensities between the polar enlargements of
the electro-magnetic machine employed; in other words, according as it becomes
necessary to increase the weight, in order to add to the electro-motive force to
be supplied to the outer circuit, to diminish the value of the magnetic derivation
in such a proportion as may be necessary to increase the ratio of the fresh "motor
couple" employed.
The mode of performance of this invention may be as follows: A U-shaped
piece of iron constituting an armature is arranged opposite the ends of the magnet
and generates magnetic derivation. By means of a screw and nut the extent
of displacement of this armature is regulated, it being at will brought nearer to,
or. farther, from, the ends of the said magnet.
With the object of arresting the descent of the weight or the action of the
motor whatever it may be, when the machine is not in use, I may turn to
account the unequal resistance offered to the motion by a Siemens armature
according to the angular position occupied by the enlargement of its magnets with
a view to "predisposing" the parts in such a manner that the varying motor
impulse, under which the instrument has to act, shall always be such that it may
not overcome, (except when the machine is set in motion) the maximum resistance
couple presented to the armature under the influence of the varying intensities

page_text: of the magnetic derivations. A knob is placed in a handy position on the
armature of the dynamo or on the shaft of a "secondary" machine, carrying a
wheel engaging with another wheel mounted on the shaft of the armature; so
that, in order to arrest the machine it is only necessary to retard its motion by
depressing the knob; which by turning the knob the machine is set in motion.
My invention may be summed up thus.
The application in telegraphic apparatus of the character referred to of means
for varying the intensities of a magnetic derivation with the object of maintaining
constant, under varying charges, the speed of the armature; all as hereinbefore
described and further the means for arresting or starting the machine, whereby
the intervention of accessory parts. is avoided, all that is necessary being,
that, with the varying electro-motive forces to be produced, the motor impulse
to be employed shall be maintained in a pre-determined constant relation to the
various maximum resistant couples arising from variations of magnetic intensity,
such couples being created by a Siemens armature, or simply a toothed armature
set in proper motion.
Pents in Electric Telegraphic Apparatus.
I, EUGENIO CANTONO, of 15, Via degli Astalli, Rome, in the Kingdom of Italy,
Captain of Engineers in the Italian Army, 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 consists in improvements upon an invention for which I have
applied for Letters Patent to be dated the 12th January 1899 on the 4th of May
instant, No. 9436.
For the purpose of maintaining at a constant angular velocity the armature
of the dynamo operating not only as a generator of electro-motive force, but
also as a regulator of the speed of transmission of the paper in a Morse receiving
instrument, or kindred apparatus, I, according to this invention, employ, in
addition to the arrangements described in the Specification of my aforesaid
Application, the mechanism hereafter described.
It is contemplated, in the special case in question, to create magnetic deriva-
tions of controllable or variable intensities between the polar enlargements of
the electro magnetic machine employed; in other words, according as it becomes
necessary to increase the weight, in order to add to the electro-motive force
to be supplied to the outer circuit, to diminish the value of the magnetic deriva-
tion in such a proportion as may be necessary to increase the ratio of the fresh
"motor-couple" employed..
.
The invention may be carried out as follows, reference being had to the
accompanying drawing wherein 1) represents a Ụ shaped piece of iron constituting
an armature arranged opposite the ends or poles M of a magnet and generates
magnetic derivation. By means of a screw Y and nut A the extent of displacement
of this armature can be regulated, it being at will, brought nearer to, or farther
from the ends of the said magnet.
With the object of arresting the descent of the weight or the action of the
motor whatever it may be, when the machine is not in use, I utilize the unequal
resistance offered to the motion by a Siemens armature, according to the angular

page_text: "
position occupied by the enlargement of its magnets with a view to predis-
posing" the parts in such a manner that the varying motor impulse, under which
the instrument has to act, shall always be such that it may not overcome, (except
when the machine is set in motion) the maximum resistance couple presented to
the armature under the influence of the varying intensities of the magnetic
derivations. A knob is placed in a convenient position on the armature of the
dynamo or on the shaft of a secondary machine carrying a wheel B engaging
with another wheel mounted on the shaft of the armature; so that, in order to
arrest the machine it is only necessary to retard its motion. by depressing the
knob, whilst by turning the knob the machine can be set in motion. My inven-
tion may be summed up thus:-
The application in telegraphic apparatus of the character referred to of means
for varying the intensities of a magnetic derivation with the object of maintaining
constant, under varying charges the speed of the armature, all as herein before
described and further the means for arresting or starting the machine, whereby
the intervention of accessory parts is avoided, all that is necessary being, that,
with the varying electro motive forces to be produced, the motor impulse to be
employed shall be maintained in a pre-determined constant relation to the
various maximum resistant couples arising from variations of magnetic intensity,
such couples being created by a Siemens armaturè, or simply a toothed armature
set in proper motion.
i
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what
I claim is:-
1. The application; in telegraphic apparatus of the character referred to, of
means for varying the intensities of a magnetic derivation with the object of
maintaining constant, under varying charges the speed of the armature, sub-
stantially as hereinbefore described."
2. In telegraphic apparatus of the character referred to the means for arrest-
ing or starting the machine, whereby the intervention of accessory parts is
avoided, the varying electro-motive forces is produced and the motor impulse to
be employed is maintained in a pre-determined constant relation to the various
maximum resistant couples arising from variations of magnetic intensity, such
couples being created by a Siemens armature, or simply a toothed armature set
in motion, substantially as hereinbefore described.
Dated this 5th day of February 1900.
JOHNSONS & WILLCOX,
47, Lincoln's Inn Fields, London, W.C., Agents.