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Sommaire du brevet 1113156 

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  • lorsque le brevet est émis (délivrance).
(12) Brevet: (11) CA 1113156
(21) Numéro de la demande: 336231
(54) Titre français: CIRCUIT THERAPEUTIQUE ELECTRO-MAGNETIQUE
(54) Titre anglais: ELECTRO-MAGNETIC THERAPEUTIC SYSTEM
Statut: Périmé
Données bibliographiques
Abrégés

Abrégé anglais





ABSTRACT OF THE DISCLOSURE


An electro-magnetic low frequency therapeutic
system comprising a magnetization coil for creating an
electro-magnetic field in response to a preselected treat-
ment signal whereby the magnetic field has a desired treat-
ment characteristic. The magnetic field has an adjustable
intensity set by adjustable control means. The control
means also is provided with circuit means for controlling
the peak amplitude of the field for achieving a specific
modulation of the peak amplitude in a given time. The
control means further has means to select the orientation
and/or direction with respect to a tissue to be treated.
Still further, the control means has circuit means to select
the repetition frequency, either pulsating or sinusoidal, fed
to the magnetization coil to obtain a selected one of dif-
ferent therapeutic signals. Still further, the control means
is provided with means to select a desired treatment time.
An automatic demagnetizing means is also provided and res-
ponsive to a preselected demagnetizing time and mode for
attenuating the field in a desired manner to terminate a
magnetic field treatment.

Revendications

Note : Les revendications sont présentées dans la langue officielle dans laquelle elles ont été soumises.


The embodiments of the invention in which an
exclusive property or privilege is claimed are defined
as follows:

1. An electro-magnetic low frequency therapeutic
system comprising a magnetization coil, said magnetization
coil being stationary during a magnetic field treatment,
for creating a preselected therapeutic magnetic field in
response to preselected coil energizing-current waveforms
whereby said magnetic field has desired treatment charac-
teristics, said magnetic field having an adjustable
intensity set by adjustable control means, said control
means also having:
(i) circuit means for controlling the peak
amplitude of the said magnetic field for achieving a
specific modulation of said peak amplitude in a given
time;
(ii) means to select the orientation and/or
direction of the therapeutic magnetic field with respect
to a tissue to be treated;
(iii) circuit means to select the frequency of
interruption of the coil energizing-current to obtain a
selected one of different therapeutic magnetic field
time patterns;
(iv) means to select a desired treatment time;
automatic demagnetizing means responsive to a preselected
demagnetizing time and mode for attenuating said field in
a desired manner to terminate a magnetic field treatment.


2. A system as claimed in claim 1 wherein the said
preselected coil energizing-current waveform is a sinu-
soidal wave.

11

3. A system as claimed in claim 1 wherein the
said coil energizing-current waveform is a periodically
interrupted or on-off modulated sinusoidal wave.


4. A system as claimed in claim 1 wherein the said
preselected coil energizing-current waveform is a series
of pulses generated by a repeatedly discharged capacitor
into said magnetization coil through a damping resistor.


5. A system as claimed in claim 4 wherein said
capacitor is discharged at preselected time intervals to
generate groups of pulses followed by time intervals
during which the coil energizing-current is zero.

12

Description

Note : Les descriptions sont présentées dans la langue officielle dans laquelle elles ont été soumises.




The present invention relates to an electro-
magnetic system and method for treating various types of
rheumatic and arthritic disease.
Various types of treatments and devices are known
to give treatment to rheumatic and arthritic diseases. This
invention is concerned with such apparatus and, namely, an
electro-magnetic apparatus having multiple uses for treating
rheumatic and arthritic diseases by means of an electro-
magnetic field having predetermined characteristics, depend-
ing on the treatment desired.
A feature of the present invention is to provide
an electro-magnetic treatment apparatus for the relief of
different types of rheumatie and arthritic diseases.
Another feature of the present invention is to
provide an electro-magnetic apparatus which may be used for
accelerating bone regeneration and wound healing and also -~
for the treatment of muscle ailments.
Another feature of the present invention is to
provide an electro-magnetic treatment apparatus wherein the
electro-magnetic field has a predetermined characteristic.
According to the above features, from a broad
aspect, the present invention provides an electro-magnetic
low frequency therapeutic system comprising a magnetization
coil.fo~hèrmagnetization coil is stationary during a
magnetie field treatment for creating a preselected
therapeutic magnetic field in response to preselected
coil energizing-current waveforms whereby the magnetic
field has desired treatment charaeteristics. The magnetic
field has an adjustable intensity set by adjustable control
means. The control means also has circuit means for
eontrolling the peak amplitude of the magnetie field for
aehieving a specific modulation of the peak amplitude in


- 1 -

. .
- ~ . - ~ . -
,

a given time. Means is provided to select the orientation
and/or direction of the therapeutic magnetic field with
respect to a tissue to be treated. Circuit means is
provided to select frequency of interruption of the coil
energizing-current to obtain a selected one of different ~ -
therapeu~c magnetic field time patterns. Means is also
provided to select a desired treatment time. Automatic
demagnetizing means is responsive to a preselected
demagnetizing time and mode for attenuating the field in
a desired manner to terminate a magnetic field treatment.




- la -
'd~

15~;
A preferred embodiment of the present invention
will now be described with reference to the accompanying
drawings in which:
FIGURE 1 is a schematic illustration of the
system
FIGURES 2a and 2b illustrate the two embodiments
of the treatment coil,
FIGURE 3 is a plan view of the control unit showing
the various controls thereon,
FIGURE 4 is a perspective illustration of the
possible configurations of the system for treating various
diseases
FIGURE 5 is a block diagram of the control unit
including both sinus and pulse treatment fields,
FIGURE 6 is a further block diagram of the system
using a pulse treatment field only
FIGURE 7 is a schematic illustration of the wave
forms utilized in the sinusoidal treatment
FIGURE 8 is a schematic illustration of the charac-

teristic of the demagnetization curves:
FIGURE 9 is a schematic showing the various signalsof the pulse treatment,
FIGURES lOa, lOb, lOc and lOd are illustrations of
the pulse shaping and
FIGURE 11 is a vector diagram showing the orienta-
tion of the electro-magnetic field.
Referring now to the drawings, and more particularly
to FIGURES 1, 2a, 2b and 4, there is shown the electro-magnetic
therapeutic system of the present invention and comprising a
magnetization coil 10 and a control unit 11 for establishing




.



a predetermined electro-magnetic field characteristic in the
magnetization coil lO. The electro-magnetic field may be the
result of a sinus or a pulse magnetization signal fed by the
control unit. As shown in Figure 2a, the magnetization coil
lO may consist of a cylinder formed of a copper wire to create
an air coil and it is used with the pulse magnetization field.
This type of coil is used for treatments such as shown in
Figure 4 at (2) and (3) illustrations, and namely, for ortho-
pedy or rheumatology treatments.
Figure 2b shows a different magnetization coil con-
struction and, herein, a core coil. It consists of a copper
wire which is coiled about a solid steel core. The wire can
then be coated with a plastic or Fiberglass, Registered Trade-
mark. The core coil may be used with the pulse or sinus electr~--
magnetic field. The air coil may also be used with the sinus
magnetic field when properly designed, that is to say, when the
coil has approximately the same inductance L,
Referring now to Figures 3, 5 and 6, there will be
described the operation of the control unit ll. The apparatus
is for medical use and for multiple treatments. The treatment
is applied by a magnetization coil lO which generates an electro
magnetic field. There are two types of coils, as previously
described, and the predetermined characteristics of the magneti-
field created by these coils is selected by the controls on the
control unit 11 and as shown in Figure 3.
In a first option of the system, the electro-magnetic
field is pulsed and in a second option, the electro-magnetic
field is sinusoidal. As shown in Figure 3, the magnetic field
has five characteristics which are adjustable by the controls
on the panel 12 of the control unit 11. The first control 13


controls the amplitude or intensity of the electro-magnetic
field from 0 to 100% as hereinshown in increments of 10%.
The control 14 controls the frequency of the fundamental of
the electro-magnetic field in the order of 1, 2, 4, 8, 16
cycles of the periodic field in a given time depending on
the selected frequency of treatment, with an interruption time
respectively equal to 1, 2, 4, 8 and 16 cycles of the periodic
field. The magnetization time is set by the control 15 and
at the termination of the magnetization time, the second phase
or the demagnetization phase of the treatment takes places.
This demagnetization phase has a time set by the control 16
for demagnetizing the coil 10. The demagnetization can be
made in accordance with a linear or exponential characteristic
as will later be described with reference to Figure 8.
The switch 17 sets the desired characteristic of
the demagnetization time either for linear or exponential
demagnetization. Switch 18 is a known switch for the system
while switch 19 is the switch which starts the treatment and
the various timers are synchronized with the switch 19. In
dicator light 20 indicates the start and termination of the
treatment. A jack 21 is provided to feed the magnetization
field characteristic signal to Ule coil.
~ eferring now to Figure 5, the connection 107 con-
nects to the switch 19 to start the treatment by operating
an initiation circuit 115. The treatment will be effected as
set by the controls on the unit 11. An audible circuit 108
is actuated during the period of treatment. The current monito
circuit 109 operates the indicator lamp 20 on the console~
In the second phase of the treatment signal, during demagne-

tization time, the amplitude is varied by means of an electro-




.
'

magnetic system 110 including a motor (not shown) coupled to
a variable transformer. The interruption of the electro-
magnetic field to produce pulse signals is effected by means
of a power semi-conductor in the high voltage circuit 111.
The entire control unit is fed by a 60 cycle 115 volt or 50
cycle 230 volt supply at 112. It is the frequency of the
voltage that determines the fundamental frequency of the mag-
netic field. A 12 volt d.c. voltage is also provided to feed
the various electronic and electro-magnetic circuits in the
apparatus. The various controls 13, 14, 15 and 16 are rep-
resented in Figure 5 at inputs 102, 103, 104 and 105. The
mode switch 17 is represented at 106.
The high voltage circuit 111 feeds the current to
the magnetization coil 10 and includes a variable auto-trans-
former which permits to adjust the current to the desired
value. A voltage transformer lowers the voltage in a manner
whereby to obtain a current of high intensity in the coil 10.
A semi-conductor of the triac type permits the interruption
of the current in accordance to the desired magnetic field.
This triac is controlled by a signal oP2.
` In the application of a pulse magnetic field, a
capacitor is charged with the current in the secondary of the
auto-transformer. The capacitor is then discharged in the
coil 10 and produces a pulse current of high intensity. This
is achieved by means of an SCR semi-conductor controlled by a
- signal OP4. This signal corresponds to the signal OP3 which
is delayed and which is similar to the signal OPl, with the
exception that the pulses correspond to the negative cycle of
the sinusoidal signal. A detector circuit is used to detect

the nil tension furnished by the synchronization signal oPl
.

-- 5 --

~L$~15~

for sinusoidal application and OP3 for the pulse
application. When the apparatus is used with a voltage of
230 volts at 50 cycles, an input auto-transformer will be
used to reduce this voltage to 115 volts 50 cycles.
The d.c. voltage regulator circuit 113 utilizes
a transformer which reduces the voltage as is necessary to
supply the circuit. A regulator is also used to obtain a
continuous voltage of 12 volts.
The current monitor circuit 109 includes a current
transformer 114 which feeds the indicator lamp 20 which permit~
visual indication that the magnetization coil is in operation.
The initiation circuit 115 is operated by the start
switch l9 and is placed in operation by the first pulse of
the signal ~c which is similar to the signal OPl. The
signal MU at one of the outputs of the circuit llS determines
the speed of the motor. The signal Q commands the first phase
of the treatment, that is, the mag time phase. The signal MR J~
appears at the end of the demag time and resets all the cir-
cuits by means of the signal R.
The frequency circuit 116 produces an interruption
of the magnetization current-at a predetermined frequency -
(103). It generates a start pulse ZC. The signal oP2 is
retarded relative to the signal oPl in such a manner to inter-
rupt the passage to zero of the current in the treatment coil.
The delay circuit 117 generates the time period of
the mag time of the treatment as predetermined by the setting
on the control 15. At the end of the treatment, signal DL
commands the other circuits.
The audible tone circuit 108 produces two different
30 frequencies in accordance with the various sections of the




.-- - - . , .,-. . . . . ,, , . ~ -


treatment. It is operated by the signal Q. The change of
the tone of the signal is controlled by the signal DL.
The amplitude circuit 118 generates a signal FD
of a predetermined frequency in accordance with the function
of the demag time (105) and set by the control 16. This cir-
cuit is controlled by the signal DL during the second phase
or the demag time of the treatment. The circuit also gener-
ates a time base TB. The time unit of this time base is
variable in accordance with the setting of the demag switch
16.
The mode circuit 119 senerates the linear cl1r~7~ or
a quasi-exponential curve of the amplitude of the magnetiza-
tion current. This choice is established by the mode switch
17. The time base signal will modify the frequency signal FD
in such a way as to produce a second signal MD of which the
; frequency will control the speed of the motor in circuit 110.
This motor is a step-by-step motor and the direction of rota-
tion of the motor is determined by the signal MU or MD. This
motor is fed by a 12 volt supply and controlled by means of
transistors. This motor will operate a variable auto-trans-
former which in turn modifies the current in the magnetization
coil whereby to demagnetize the coil in accordance with the
preset mode characteristic.
Figure 6 includes the same component parts of the
circuit described in Figure 5 with the exception that it is
restricted to the pulse mode, whereas in Figure 5, there is
shown both the pulse and the sinus modes.
Referring now to Figure 7, there is shown the detaile~
wave forms for the sinus electro-magnetic field treatment.
As shown, the basic wave form is a sinusoidal wave form which



-- 7 --

~ a


is either a 60 or 50 cycle signal dependlng on the frequency
supply of the input voltage.
Figure 8 is an illustration of the characteristic
of the demagnetization curves when the system is utilized
in the linear or the quasi-exponential mode. The character-
istic of the linear mode is shown at 90 and the quasi-expo-
nential mode is shown at 91. The demag time tf = .5, 1, 1.5,
etc. as shown on the control 16 of Figure 3.
Figure 9 shows the electromagnetization field in
the pulse option.
An important original feature of the pulse shaping
circuit (of the pulsatile generator) is that the electronic
components of this circuit are shown so as to obtain a criti-
cal or "nearly critical" damping of the current pulse flowing
through the Treatment Unit. -
Referring now to Figures lOa, b, c and d, there
is shown the pulse shape of the signal in the pulse option
with the connection of the elements L, RL and C as shown in
Figure lOd and forming the pulse shaping circuit. This em-
bodiment is the critical damping case where


C -(4L2), tm =( ~ ) , and im = -(RL) CV


where C = the capacitance of charged capacitor(s)
L = inductance of magnetization coil
RL = DC resistance of wire of magnetization coil

t = as defined in FIGURE 10 (approx. half of desired
m pulse width) time corresponding to im
im = as defined in FIGURE 10, maximum current
VO = maximum voltage across C when charged
e - base of the natural or neperian logarithm --
(a~prox. 2.71828)

-- 8 --
, ~
f

. . , , ,, '.
.



and it is intended that any of the components of this R, L,
C circuit can be changed so as to cause the peak amplitude
of the said current pulse to decrease by not more than 50%
of that resulting from the "Critical Damping Conditions" de-
fined above, without departing from the spirit and scope of
the present invention.
Figure 11 is a vector representation using the
calculation of the magnetic field generated by a magnetic
dipole effective mass +m and -m, separated by a distance 1.
The following equation applies for the coil as illustrated
in Figure 2b~ It can be shown that




i6




2~




' ~ .. . .


' .11 ~ ~ .




-- 10 --


W.. _ _. ,. - : .

Dessin représentatif

Désolé, le dessin représentatatif concernant le document de brevet no 1113156 est introuvable.

États administratifs

Pour une meilleure compréhension de l'état de la demande ou brevet qui figure sur cette page, la rubrique Mise en garde , et les descriptions de Brevet , États administratifs , Taxes périodiques et Historique des paiements devraient être consultées.

États administratifs

Titre Date
Date de délivrance prévu 1981-11-24
(22) Dépôt 1979-09-24
(45) Délivré 1981-11-24
Expiré 1998-11-24

Historique d'abandonnement

Il n'y a pas d'historique d'abandonnement

Historique des paiements

Type de taxes Anniversaire Échéance Montant payé Date payée
Le dépôt d'une demande de brevet 0,00 $ 1979-09-24
Titulaires au dossier

Les titulaires actuels et antérieures au dossier sont affichés en ordre alphabétique.

Titulaires actuels au dossier
RODROL INSTRUMENTATION INC.
Titulaires antérieures au dossier
S.O.
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Description du
Document 
Date
(yyyy-mm-dd) 
Nombre de pages   Taille de l'image (Ko) 
Dessins 1994-03-23 8 264
Revendications 1994-03-23 2 57
Abrégé 1994-03-23 1 33
Page couverture 1994-03-23 1 13
Description 1994-03-23 11 393