U.S. patent number 3,902,502 [Application Number 05/505,864] was granted by the patent office on 1975-09-02 for apparatus for temporarily arresting arthritic pain.
Invention is credited to George Feldstein, Saul Liss.
United States Patent |
3,902,502 |
Liss , et al. |
September 2, 1975 |
Apparatus for temporarily arresting arthritic pain
Abstract
The present invention pertains to portable electronic apparatus
which is locally applied to relieve an arthritic condition and as a
treatment relieves the pain for a time period of 1 hour to 8 hours.
No curative effects are claimed or anticipated by this apparatus,
however, the temporary relief appears to equal or surpass local
cortisone shots in joints, inflamed muscles or other arthritic
afflicted areas and without the side effects of cortisone. The
present apparatus preferably as a small electronic device employs a
current source provided by a battery having nominally eighteen
volts d.c. This current is comprised of two major frequency
components and is applied to local areas and controlled so that a
current of 0.8 milliamperes or less is the peak current applied and
is indicated on a meter scale measuring the flow through the
contacts applied at the affected part. This current flow is in one
direction and is limited to 10 to 40 cycles at a 75 percent duty
cycle imposed upon a current flow of between 20 kilocycles and one
megacycle.
Inventors: |
Liss; Saul (Paterson, NJ),
Feldstein; George (Cresskill, NJ) |
Family
ID: |
24012190 |
Appl.
No.: |
05/505,864 |
Filed: |
September 13, 1974 |
Current U.S.
Class: |
607/46; 607/64;
607/71 |
Current CPC
Class: |
A61N
1/36021 (20130101); A61N 1/32 (20130101) |
Current International
Class: |
A61N
1/32 (20060101); A61N 1/34 (20060101); A61N
001/36 () |
Field of
Search: |
;128/419R,421,422,423,2.1R,1C,172.1 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
Primary Examiner: Kamm; William E.
Attorney, Agent or Firm: Roberts; Ralph R.
Claims
What is claimed is:
1. An electronic apparatus for temporarily arresting at local areas
a patient's arthritic pain and the like, said apparatus having
conducting leads for carrying the output of the apparatus to
contact ends to conductively apply to the skin of the patient and
at a localized area a forward going pulse which is automatically
continued for a short period such as 3 to 4 minutes, said apparatus
including: (a) a power source providing a d.c. voltage to the
apparatus; (b) switch means which when closed at least momentarily
initiates a flow of d.c. voltage from the power source to a pulse
forming apparatus; (c) means for limiting the time duration of the
d.c. current flow to the pulse forming apparatus; (d) a first
astable square wave multivibrator having a asymmetrical duty cycle
which may be as little as two-thirds of the cycle and as great as
five-sixths of the cycle and operating at a selected rate of not
less than ten and not more than 40 hz., said vibrator connected to
and providing a gate control for; (e) a second astable square wave
multivibrator having a duty cycle of 50 percent and operating at a
selected rate of not less than 20 khz. and not more than 1 mhz.,
the combined forward going pulsed wave being fed to; (f) an
automatic current control by which the output level of the pulsed
wave is maintained at a selectively set level not exceeding
eight-tenths of a milliampere, and (g) means for conducting said
output to two contact members in local contact on the skin of the
patient, the automatic current control maintaining the selected set
level no matter what changes in impedance occur in the transmission
of said current locally through the skin of the patient.
2. An electronic apparatus as in claim 1 in which the switch means
is a spring-biased switch which is urged to its "off" condition and
when closed causes a timer circuit to be initiated and with a power
supply control circuit feeds the d.c. voltage to the first and
second multivibrator and the automatic gate control.
3. An electronic apparatus as in claim 2 in which a
microampere-meter is connected to the output conductor leading from
the automatic current control to the skin contact member, said
micro-ampere-meter arranged so as to provide a visual indication of
the output level flowing through the local skin area.
4. An electronic apparatus as in claim 1 in which the voltage
source is about eighteen volts d.c.
5. An electronic apparatus as in claim 1 in which the voltage
source is a rechargeable d.c. battery system and the apparatus
circuit includes a charging circuit disposed to feed rectified
current as received from an A.C. current supplied charger to the
rechargeable battery.
6. An electronic apparatus as in claim 5 in which the electronic
circuit includes a diode so connected in the circuit that the
charging current sent to the d.c. battery source from the charger
is prevented from flowing in a reverse direction to the automatic
current control and first and second multivibrator.
7. An electronic apparatus as in claim 6 in which the apparatus and
power source is encased in a small housing to make the apparatus
portable and in which the means for conducting the output current
are conductive leads to the patient and include disconnecting means
provided at one of the walls of the housing by which the conductive
leads may be disconnected and connected as desired.
8. An electronic apparatus as in claim 7 in which the disconnecting
means includes jacks of two different configurations and mating
receptacles so that reconnection can be achieved only in one
arrangement, and in which the charger is provided with two
conductors, one terminating at a jack adapted for connection with
one receptacle and the other conductor terminating at a jack
adapted for connection to the other receptacle, said charger thus
being able to be connected to the apparatus only when the
conductors for the skin contactors are disconnected.
9. An electronic apparatus as in claim 1 in which the first
multivibrator has a duty cycle of three-fourths "on" and one-fourth
"off."
10. An electronic apparatus as in claim 1 in which the means for
limiting the time is a timer circuit which is preset to provide
between 3 and 4 minutes.
Description
Background of the Invention
2. Field of the Invention
With reference to the classification of art as established by the
United States Patent Office the present invention discloses and
claims apparatus and method as found in the general Class entitled,
"Surgery" (Class 128) and in particular in the subclass entitled,
"electrical systems" (subclass 419R) and the subclass thereunder of
"oscillation circuits" (subclass 422).
2. Description of the Prior Art
Electrical pulses in both low and high voltages and current flow
have been used to treat human aches and pains. Aches and pains is
the misery of arthritis and many attempts to temporarily relieve
the discomfort of arthritic pain have been made and many are
exemplified in patents specifically or peripherally describing
and/or claiming arthritis relief or cure. The study of
physiotherapy and the use of electrically produced waves are
reviewed in U.S. Pat. No. 3,056,409 to EDWARDS as issued on Oct.
2nd, 1962. In this patent audio frequency current in square wave
form at a frequency of 9 to 26 c.p.s. is applied locally to the
afflicted areas. From the lack of acceptance of this device since
its public disclosure in 1962 it is evident that arthritic pain is
not alleviated by its square wave producing circuit. These waves
are disposed above and below a theoretical horizontal datum line
and in a symmetrical pattern. Although the therapy from this device
may be beneficial to muscle stimulation the use of wave patterns
similar to brain waves does not alleviate the pain from
arthritis.
A very recent dual oscillator, variable pulse duration
electrotherapeutic device as seen in U.S. Pat. No. 3,794,022 as
issued to NAWRACAJ on Feb. 26th, 1974 uses square waves in a cycle
pattern where the pulse pattern provides separate voltage currents
of separate frequencies by a series of pulses of a varying duration
during a predetermined period.
U.S. Pat. No. 3,513,851 as issued to SMITH etal. on May 26th, 1970
uses a balanced signal from a datum line wherein the signal, when
the pulse is actuated, tapers to a peak intensity then diminishes
to the datum line.
In most of the electrotherapeutic devices, muscle stimulation seems
to be achieved and proof of the effectiveness of such devices for
muscular stimulation is found in the locker rooms of athletic
teams, health spas, etc. In many instances, the electrical source
is A.C. current from a wall plug. The voltages may be from 2 to 5
and in some instances up to 250 volts is approved by the American
Medical Association for physiotherapy treatment.
The present invention is unique in that the desired arthritic
suppression is achieved by providing a very small current flow at a
low voltage (18 v.d.c.). This current flow is applied to give a
pumping action to the nerve train between the applied contact
points. The impedance of the patient is compensated for by the
constant current circuit which is automatically readjusted to the
needs of the patient. The pumping action current flow is achieved
by applying at a cycle rate between 10 and 40 hz., a 75 percent on
and 25 percent off a high carrier frequency from 20 khz. to one
megacycle. This high frequency is produced by a 50 percent duty
cycle multivibrator so that all cycles are above the datum line.
The modulation low frequency vibrator provides a square wave
output.
The selection of the modulation frequency to fall within 10 to 40
cycles per second avoids causing any fugitive signal transmission
to the brain whose cycle frequency is eight or less and the heart
which is fifty or more. The control of the voltage to 18 volt. d.c.
at a current flow of eight-tenths of a milliampere insures that
repeated usage beyond the normal three to four minute application
is perfectly safe under any and all circumstances. As reduced to
practice, the apparatus including power supply is of a very small
size. The application may be personally applied by the one for whom
the treatment is required. Many patients are, or are anticipated to
be, senior citizens and for this reason the use of the apparatus
must be absolutely foolproof as to possible misapplication, shorts
in the apparatus and even to the extent of immersion in water or a
similar medium. The low voltage supply and the use of solid state
electronics insures that the apparatus of this invention is
absolutely safe in all circumstances.
SUMMARY OF THE INVENTION
This invention may be summarized at least in part with reference to
its objects.
It is an object of this invention to provide, and it does provide,
a small electronic device from which is controllably discharged a
one-way electrical current flow. This current is controllably
applied to a localized source of affliction for a determined time
period as for example three and one-half minutes. This current flow
is applied in the nature of a pumping action which appears to
assist the synaptic chain flow in the nerves to cause the nerves to
be relieved of their tension. The current as applied has a base
vibration of 20 kilocycles to 1 magacycle, which current is
modulated by an astable multivibrator with a 75 percent duty cycle
to present a current flow of 75 percent on and 25 percent off at a
cycle of frequency 10 to 40 hz. with a current flow automatically
controlled not to exceed eight-tenths of a milliampere.
It is a further object of this invention to provide, and it does
provide, both an apparatus and method wherein a very low voltage
such as 18 volts d.c. is fed to a power supply control circuit and
from thence to a gated multivibrator circuit containing one astable
multivibrator having a 50 percent duty cycle. This high frequency
current of 20 kilohertz to 1 megahertz is gated by a second astable
vibrator with a 75 percent duty cycle in which the cycle is between
10 to 40 hz. with the resulting local current flow automatically
restricted to eight-tenths of a milliampere when applied to the
afflicted area to provide arthritic pain suppression. Tests have
established that the pain suppression is effective for periods of 1
to 7 hours.
It has been found that since this controlled flow is in the nature
of a one-way current flow which is asymmetrical, the placing of the
contacts on the patient with or without the use of a conductive
jelly is extremely important in that the current flow must be
through the nerves associated with the local pain area.
As reduced to practice, and under the controlled evaluation by
doctors it has been found that a very small current flow such as
eight-tenths of a milliampere or less of the dual frequency current
when applied to a local area for approximately three and one-half
minutes has reduced arthritic pains to substantially painless
levels. Since the arthritic pain can occur at any time the
apparatus has been made portable and in a package approximately the
size of two packs of cigarettes. Much of this size is to
accommodate in this apparatus two nine volt d.c. batteries. In the
circuit, to be hereinafter more fully described, these batteries
are of the rechargeable variety and provision for recharging is
shown in this circuit diagram.
The treating current produced by this circuit through two
multivibrators operating as a combination provides a pulsing action
of current to the afflicted area. The forward going current is "on"
75 percent and "off" 25 percent and is a square wave derived by a
75 percent duty astable mutivibrator. This square wave further
controls a 50 percent duty cycle astable multivibrator. The
resulting applied current is at 20 kilocycles to one megacycle at a
modulated frequency of ten to 40 hz. A current control limits the
current flow to a maximum of eighttenths of a milliampere with a
maximum applied voltage nominally of 18 volts, but independent of
the actual voltage across the contacts. This current output is
carried to two contacts, one identified as a positive and one as a
negative or common electrode.
In addition to the above summary the following disclosure is
detailed to insure adequacy and aid in understanding of the
invention. This disclosure, however, is not intended to prejudice
that purpose of a patent which is to cover the inventive concept
therein no matter how it may later be disguised by variations in
form or additions of further improvements. For this reason there
has been chosen a specific embodiment of the apparatus for
temporarily arresting arthritic pain as adopted for use by
arthritic sufferers. This specific embodiment has been chosen for
the purposes of illustration and description as shown in the
accompanying circuit diagram wherein:
BRIEF DESCRIPTION OF THE CIRCUIT DIAGRAM
The circuit diagram is in the form of a block diagram in which is
represented the various functions of the components forming the
circuit and providing the special current flow output of the
arthritic pain suppression device. In this circuit diagram and in
the description hereinafter the same identifying numbers are
applied to like components for the sake of convenience and not
necessarily in a limiting sense.
DESCRIPTION OF THE PREFERRED CIRCUIT
Referring now to the electronic arthritic pain suppression
apparatus as shown in the accompanying and above-identified circuit
diagram the desired current flow is initiated by an on-off switch 1
which is preferably spring biased to the normally "off" condition.
When the switch is actuated it causes the circuit to be turned on
with the rest of the functions being performed in an automatic
nature. With the actuating of the switch a timer circuit 2 is
turned on. This timer circuit when initiated has a predetermined
set timing cycle and, as reduced to practice, through monitored
tests is preferably three to four minutes in duration. At the same
time that the timer circuit is turned on the power supply control
circuit 3 is also turned on. This power supply control circuit 3 is
interconnected to timer circuit 2 by means of conductors 4 and 5
and its actuation results from the closing of switch 1 with this
signal carried through conductor 6. Power for this apparatus is fed
to the power supply control circuit by and from an eighteen volt
d.c. source 8 which is contemplated to be two nine volt
rechargeable batteries. This voltage source identified as 8 is
connected by conductor 9 to the positive side of the battery 8 and
to the power control circuit 3. From this power control supply
circuit 3 the current is fed through conductor 10 simultaneously to
three interconnected and related components. An astable
multivibrator 12 which produces square waves is quite familiar to
those skilled in the art. This astable multivibrator has a 75
percent duty cycle and is adjusted to produce a cycle of 10 to 40
hz. and is connected by means of conductor 14 to another astable
multivibrator 16 which has a 50 percent duty cycle and functions
anywhere from 20 kilo hz. to 1 mega hz.
The resulting vibrating current from astable multivibrator 16 is
connected by conductor 18 to a current control apparatus 20 which
in the present device is anticipated to allow adjusting the current
flow to a maximum of eight-tenths of a milliampere. The amount of
current also is indicated to the user or supervisor of the
apparatus by connecting the output of the current control through
conductor 22 to and through a microampere meter 24 which is
connected to a positive outlet female receptor 26 by means of a
conductor 28. This receptor 26 is a female receptor sized to
receive a male jack 29 which is inserted into the female jack
receptor to make an electrical connection. This, of course, is
merely a convenience and the use of a jack connection as far as the
circuit is concerned may be eliminated by connecting the output of
the microampere meter 24 directly to the conductor 28 and thence to
a contact member 30. This contact retaining member 30 preferably is
a spring clip such as is used with the flexible conductors normally
used in apparatus for taking ekg's. In this member 30 is mounted a
contact 32 having an adhesive outer retaining means. These contacts
are replaceably mounted in the member connector 30. To improve the
conductivity between the conducting portion of the contact 32 and
the skin of the patient a jell 34 is indicated as being applied to
the contact before and at the time of the mounting of the contact
on the skin of the patient. The negative or ground side of battery
8 is connected preferably to a female receptor 40 which is
connected by means of a male jack 42 and a conductor 44 to a spring
clip retaining member 46. A discardable adhesive contact 48 is
removably retained by this retaining member 46 and the conductivity
from and to the skin is enhanced by using a dab of jelly 34. This
commerically available jelly 34 is applied to the contact as is
customary in the taking of an ekg.
In order to insure versatility of the equipment and eliminating the
replacement of the battery power source a recharging means is
contemplated. A charger circuit is therefore incorporated into the
present apparatus. This charger is contemplated as only being
employed when contacts 30 and 46 are disconnected with the
withdrawal of jacks 29 and 42. Charging orientation is insured by
making jacks 29 and 42 different in size. Correspondingly sized
jacks 60 and 62 are adapted for insertion into the female
receptacles 26 and 40 in the manner of the jacks 29 and 42. Jacks
60 and 62 by means of conductors 64 and 66 are connected to a
charger 68 of conventional known design. These chargers convert 120
volts A.C. current to the required d.c. voltage and charge
conventionally rechargeable batteries. The charger 68 is connected
by means of conductors 70 to outlet plug 72 connectable to
available A.C. house current. To prevent damage to the current
source control 20 and the multivibrators 12 and 16 a diode 74 is
inserted into the conductor 28. The positive current flow is then
carried by conductor 76 from the female receptor 26 to a charging
circuit 78 and thence by means of a conductor 80 to the positive
side of the battery 8 for recharging the battery at the needed
intervals.
Use and Operation of the Apparatus
The "on" switch 1 is depressed to start the timing circuit 2 and
activate the power supply control circuit 3 to the several
components forming the vibrating pulse which is applied locally for
a determined time period to stimulate the nerves in the afflicted
area in a desired orientation. The timer circuit 2 limits the flow
of current from power supply 3 to a determined time interval such
as three and one-half minutes after the power from the battery 8 is
turned off. The eighteen volt d.c. battery supply 8 supplies the
electromotive force for all of the circuitry and from the power
supply control circuit 3 there is a distribution of function of
this power force not only to the timer circuit and back to the
power supply control circuit but also to the various other items
such as the multivibrators and the current controlling circuit.
The astable multivibrator 12 is special insofar as it has a 75
percent duty cycle which means it has a 25 percent "off" time and a
75 percent "on" time. For the purpose of safety and use by the
patient this particular multivibrator has a cycle time of from 10
to 40 hz. This cycle is set at the factory and usually is about 25
hz. The multivibrator 12 is connected by means of a conductor 14 to
the astable multivibrator 16 and is a modulator for this high
frequency vibrator 16 which functions at anywhere from 20 kilo hz.
to 1 mega hz. The signal from vibrator 12 is gated at its input
side to multivibrator 16. The vibrations of the second astable
multivibrator 16 is pulsed by the output or flow control of
multivibrator 12 which literally turns the second of high frequency
multivibrator 16 "on" and "off" as the case may be depending upon
the function of the astable multivibrator 12. The combined output
of the astable multivibrators 12 and 16 is then presented to the
current source control 20 through conductor 18 as a square wave
function. All of the wave vibrations are above a minimum or medium
line and occur as a 75 percent "on" and a 25 percent "off" flow. As
a square wave signal this current is fed to and through the current
control source 20 so that a maximum current flow of eight-tenths of
a milliampere is maintained and this is read by the indicator
signal of the micro ampere meter 24. This flow is fed to the output
receptor 26 and eventually to the contact member 30 and the contact
pad 32 and then to the skin of the patient. Although the source has
been established to a maximum limit of eight-tenths of a
milliampere the particular ampere flow level generally through the
afflicted area of a paitent is from three-to six-tenths of a
milliampere. Provision may be made to permit the doctor or the user
of the device to adjust the current source control by a variable
control. This adjustment is generally set at the factory but may be
adjusted to a particular patient and if necessary for a particular
afflicted portion.
During the time the apparatus is not in use the battery may be
charged. Jacks 29 and 42 are removed from receptors 26 and 40 and
jacks 60 and 62 mounted therein. Charger 68 is then connected to
A.C. power through plug 72 and the charging circuit 78 feeds the
required charging power to battery 8. Diode 74 is a one-way gate
preventing current from charger 68 from flowing to the vibrating
and current flow limiting components.
The above-described apparatus has recited specific limitations
which are deemed significant. First, the astable multivibrator
limits the forward going pulses to a 10 to 40 cycle range. This
limitation is deliberate. The 10 cycle low limit prevents any stray
pulse signals in the nerves to affect the human brain function
which is at 8 or less cycles. The high limit of 40 cycles is
established to prevent any stray pulse signals from affecting heart
signals of 60 or more. The square wave signal insures that the
"pulses" when "on" are alike and regular. The 50 percent duty cycle
insures that all pulses are forward going and no alternating or
reversing tetanizing current flows to the afflicted nerve area.
The current source control 20 automatically compensates for the
impedance in the skin of the patient at the particular time of use.
It was recognized that there are many variables in the effecting of
a localized electrical contact with the skin. The impedance in the
skin appears to vary from day-to-day and even from hour-to-hour. It
is impractical, if not impossible, to apply the contacts to the
exact same skin locations time after time. In addition the contact
pressure varies from time to time and particularly with and during
the patient's movement. Hence, to apply a precise forward going
vibrating current of a very low controlled amount to the afflicted
area an automatic impedance control is needed and is provided. The
apparatus can only be connected to a potentially dangerous power
source during the battery recharging period. As arranged, contacts
30 and 46 with jacks 29 and 42 must be removed before jacks 60 and
62 are inserted to carry converted current from the charger 68 to
battery 8.
The above-described apparatus provides a nerve stimulator which
although battery powered employs such a small current that it often
requires a viewing of the meter 24 to be sure that treatment is in
process. This is in sharp contrast to apparatus such as that
employing 25 milliampere at 120 volts. This type of apparatus
requires a manual control by which the patient can reduce the input
to his own tolerant levels until repeated use builds up a
conditioning acceptance. Most of the prior art apparatus known to
the Applicant's permit the applying of the contacting electrodes to
the patient's skin without a definitive arrangement of the positive
and negative contacts. This is not true of the present apparatus,
as above noted, the orientation of the contacting electrodes on the
patient is extremely important. The orientation is aligned to
augment the nerve flow and is achieved with the positive electrode
nearer the heart so that the applied pulse is only forward going
and when "on"the frequencies are only on one side of a datum
line.
It is also to be noted that although the astable multivibrator is
shown as a 75 percent duty cycle, other ratios provide to varying
degrees success in the arresting of pain as long as the pulse
vibrations are forward going. Ratios of two to one, four to one and
even five to one have produced temporary pain relief. The most
effective ratio with the several patients treated under a doctor's
evaluation and supervision has been the three to one ratio produced
by multivibrator 12.
Terms such as "in," "out" and the like are applicable to the
components described in conjunction with the circuit diagram. These
terms are merely for the purposes of description and do not
necessarily restrict the components and their manipulation.
While a particular circuit diagram has been shown and described it
is to be understood the invention is not limited thereto and
modifications may be made within the scope of the accompanying
claims and protection is sought to the broadest extent the prior
art allows.
* * * * *