US1648116A - Electrotherapeutic device - Google Patents

Electrotherapeutic device Download PDF

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US1648116A
US1648116A US103370A US10337026A US1648116A US 1648116 A US1648116 A US 1648116A US 103370 A US103370 A US 103370A US 10337026 A US10337026 A US 10337026A US 1648116 A US1648116 A US 1648116A
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current
interrupter
rheostat
source
contact
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US103370A
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Ebel Siegfried Samuel
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
    • A61N1/00—Electrotherapy; Circuits therefor
    • A61N1/18—Applying electric currents by contact electrodes
    • A61N1/32—Applying electric currents by contact electrodes alternating or intermittent currents

Definitions

  • This invention relates to improvements .in 1
  • contact-arm eii'ect s an automatically and slowly increasing and decreasing faradic current,- in order to decrease the disagreeable feeling of the usual faradic current.
  • the rheostat causing the slow increase and decrease of the faradic current, either is connected with the apparatus producing the current or forms a separate additional device. 7
  • the said slow increase and decrease takes place in a proper sine curve and therefore any sudden alteration of current and shocks which would be painful to the patient cannot occur.
  • the current, employed for the treatment is increased very slowly without any disturbance of the protoplasm and shocks to the muscles owing to sudden current-shocks and there-v fore considerably stronger currents can beused which of course cause a more quick and through treatment without anypain.
  • the periods of vibration of the interrupter slow- 1y increase and decreasein dependency on the rheostat.
  • FIG. 1 One mode of carrying out the present invention is illustrated diagrammatically in Fig. 1 on the accompanying sheet of drawings, while Figure 2 illustrates the waveform of the current.
  • the working current is supplied by dry cells 1. which are connected to acounter 3, -whereby a switch 2 is interposed between the cells and the counter, in order to switch-on one or more or all cells. From the counter the current passes to the coils 4 ofan interrupter, which consists. of a double-armed lever 6 pivotally secured to a shaft 7. The free endofthe lever 6 carries a soft-iron member 8, which is attracted by the cores of the coils 4 during the passage of the current.
  • a plate spring 9 on which rests a contact pin 10, the latter may be moved forward or backward by a rack 11 and a toothed wheel .12, so that according to the distance of the contact pin 10 from the pivotal axis 7 'the lever 6 carries out larger or smaller oscillations or performs interruptions of'thecurrent for a shorter or longer time and therefore imparts a diflerent characteristic to the sameaccording to requirement.
  • This interrupter which can be readily adjusted, is conductively connected with a contact-arm 14 of the rheostat by a Wire 13 and a resilient sliding member.
  • the rheostat consists of .a circular spiral-wound resistancewire 16, which is connected with a number of contact studs 17, on which slides the arm 14.
  • the contact studs 17 at the right and left hand sides and disposed at the same height correspond to the switching on of like resistances. At the lowest stud a resistance is not'swit'ched on, While at the diametrically opposed studs mm the maximum resistance is switched on. At this place the resistance wire is interrupted, so that the studs m m are insulated from each other.
  • The-contact-arm It is rotated by a clockwork, which can be wound up b a crank.
  • the speed of unwindin the 0100 work can be varied by a brake, w ich can be adjusted by a screw, so that the contact-arm 14 can rotate over the contact-studs 17 at a faster or slower pace according to requirement or can be stopped temporarily for obtaining a uniformly flowing current.
  • the primary winding21 of the induction coil necessary for producing the faradic current, is connected'directly with thecells 1 and with the resistance Wire 162.1; the bottom stud. From the secondary winding 22-, in
  • The. adjustment of the. iron-core '23 may be accomplished by a rotatable knob- 24,
  • the knob 24' is provided with a pointer operating on a dial, in order'to indicate the adjustment of the iron-core 23.
  • a device of this kind can be greatly varied by varying the number of interruptions and independent therefrom the number of rotations of the contact-arm 14.
  • the interrupter and rheostat are connected in'series or behind each other in such a manner, that the switchingon of the resistances ofthe rheostat also acts on-the interrupter, so that on switchingon a weak resistance, thus on the passage of a stronger current, the interrupter carries out larger and correspondingly slower oscillations, while on switching-one stronger resistance the oscillations of the interrupter are smaller and quicker.
  • Fig. 2 illustrates graphically-the rhythmic alterations of the intensity of current and it will be seen, that sudden current-shocks cannot take place, but that the increase and decrease of the faradic current is gradual or uniform, so that the said faradic current is quite painless.
  • Fig. 2 also shows, that at a certain adjusted length of the interrupter-lever 6, 9, which-is carried out independent of the number of rotations of the rheostat, the frequency of the interrupter depends on the position of the contact-arm 14 at the wire 16 of the rheostat.
  • the connecting electrodes are sub-divided, in order to correspondingly distribute the effect of the current.
  • the device is quite independent of heavy current, as it can be rea 'ly worked with dry cells.
  • the oscillations of the interrupter taking place within the sine curve, adapt themselves to the work of the rheostat and also may be regulated independent of.
  • An .electro-therapeutic device of the character described comprising a source of current, aninterrupter connected with the saidsource of current, an automatic and uni formly variable rheostat connected with the interrupter, and induction means connected with the rheostat and the source of current, the vibrations of the interrupter slowly increasing and decreasing in dependency on the rheostat.
  • An electro-therapeutic device of the character described comprising a source of current, an interrupter connected with the source of current, an automatic and uniformly variable rheostatfconnected immediately behind the interrupter, and induction means the primary winding ofwhich is connected with therheostat and the source of current, the vibrations of the interrupter source of current, a rheoflat provided with rupter' independent of the number of rotations of the said contact-arm, and induction means connected with the rheostat and the source of current.
  • An electro-therapeutic device of the character described comprising a source of current, an interrupter connected with the source of current, the said interrupter comprising coils, a pivotally mounted doublearmed lever provlded with a soft-iron member at one end and a plate-spring at the otherend thereof, a contact-pm operatin on the said spring, a rack to which the said contact-pin is secured, and a toothed wheel for operating the rack, a rheostat provided .with a positively rotating c'ontactarm con nected immediately behind the interrupter,
  • An electro-therapeutic device of the character described comprising a dry cell, a counter connected with the latter, a switch interposed in the connection between the cell and the counter, an interrupter connected with thecounter, an automatic and uniformly variable rheostat connected with the interrupter, and induction means connected with the rheostat and the dry cell.
  • An electro-therapeutic device of the character described comprising a source of current,-.an interrupter connected with the source of current, a rheostat connected immediately behind the interrupter, the said rheostat comprising a positively rotating contact-arm, a circular spiral-wound-resistance-wire, and a number of contact-studs connected with the resistance-wire, and induction means connected with the rheostat andthe source of current.
  • V 8 An electro therapeutic device of the character described, comprising a source of current, an interrupter connected with the source of current, an automatic and umformly variable rheostat connected immediately behind the interrupter, and induction means connected with the rheostat and the source of current, the said induction means co m rising a primary winding, a secondary ing, an adjustable iron-core within the f latter,-and,meana for adjusting the said core guano I for varying the intensity of the faradic, current.
  • An electro-therapeutic device of the character described comprising a source 01' current, an interrupter connected 'with the source ofcurrent, means on the interrupter for regulating the frequency of the inter-.
  • the said rheostat comprising a rotating contact-arm, a circular spiralwound resistance-wire, and a number of contact-studs connected with the resistancewire, and induction means connected with the rheostat and the source of current.
  • An electro-therapeutic device of the character described comprising a source of current, an interrupter connected with the source of current, a rheostat connected immediately behind the interrupter, and induc-' tion means connected with t e rheostat and the source of current, the said induction means comprising a primary winding, a secondary' winding, an adjustable iron-core within the latter, and means for adjusting the said core for varying the intensity of r the faradic current, the said means com llS- ing'a rotatable knob, a roller operate by the latter, and a string passing over the roller and secured to both ends of the said core.
  • An electro-therapeutic device of the character described comprising a source of current, an interrupter connected with the SIEGFRIED SAMUEL EnEL.

Description

Nov. 8, 1927. 1,648,116
5. s. EBEL ELECTRO THERAPEUT I C DEVI CE Filed April 1926 lA/Vd'A/TOR Patented Nov. 8,; 1927.
, siren STATES t 1,648,116 PATENT OFFICE.
SEGFD UEL EIBEL, F VIENNA, AU STBIL' ELECTEO'IHEBAPEUTIC DEVICE.
Application 'flled April.20, 1926, Serial No. 103,370, and in Austria April- 20, 1925.
This invention relates to improvements .in 1
contact-arm eii'ects an automatically and slowly increasing and decreasing faradic current,- in order to decrease the disagreeable feeling of the usual faradic current. In these known devices the rheostat, causing the slow increase and decrease of the faradic current, either is connected with the apparatus producing the current or forms a separate additional device. 7
In the device according to the present invention the said slow increase and decrease takes place in a proper sine curve and therefore any sudden alteration of current and shocks which would be painful to the patient cannot occur. For these reasons in the device according to the present invention the current, employed for the treatment is increased very slowly without any disturbance of the protoplasm and shocks to the muscles owing to sudden current-shocks and there-v fore considerably stronger currents can beused which of course cause a more quick and through treatment without anypain.
According to the present invention the periods of vibration of the interrupter slow- 1y increase and decreasein dependency on the rheostat.
One mode of carrying out the present invention is illustrated diagrammatically in Fig. 1 on the accompanying sheet of drawings, while Figure 2 illustrates the waveform of the current.
The working current is supplied by dry cells 1. which are connected to acounter 3, -whereby a switch 2 is interposed between the cells and the counter, in order to switch-on one or more or all cells. From the counter the current passes to the coils 4 ofan interrupter, which consists. of a double-armed lever 6 pivotally secured to a shaft 7. The free endofthe lever 6 carries a soft-iron member 8, which is attracted by the cores of the coils 4 during the passage of the current.
At the bottom side of the lever 6 is provided 7 a plate spring 9 on which rests a contact pin 10, the latter may be moved forward or backward by a rack 11 and a toothed wheel .12, so that according to the distance of the contact pin 10 from the pivotal axis 7 'the lever 6 carries out larger or smaller oscillations or performs interruptions of'thecurrent for a shorter or longer time and therefore imparts a diflerent characteristic to the sameaccording to requirement.
This interrupter, which can be readily adjusted, is conductively connected with a contact-arm 14 of the rheostat by a Wire 13 and a resilient sliding member. The rheostat consists of .a circular spiral-wound resistancewire 16, which is connected with a number of contact studs 17, on which slides the arm 14. The contact studs 17 at the right and left hand sides and disposed at the same height correspond to the switching on of like resistances. At the lowest stud a resistance is not'swit'ched on, While at the diametrically opposed studs mm the maximum resistance is switched on. At this place the resistance wire is interrupted, so that the studs m m are insulated from each other.
The-contact-arm It is rotated by a clockwork, which can be wound up b a crank.
The speed of unwindin the 0100 work can be varied by a brake, w ich can be adjusted by a screw, so that the contact-arm 14 can rotate over the contact-studs 17 at a faster or slower pace according to requirement or can be stopped temporarily for obtaining a uniformly flowing current.
The primary winding21 of the induction coil, necessary for producing the faradic current, is connected'directly with thecells 1 and with the resistance Wire 162.1; the bottom stud. From the secondary winding 22-, in
which is disposed an adjustable iron-core 23 for varying the intensity of the faradic current, pass wires to electrodes 29, which are attached to the human body. I
The. adjustment of the. iron-core '23 may be accomplished by a rotatable knob- 24,
which operates a roller -25, over the latter passing strings 26 secured to both ends of the core 23. The knob 24' is provided with a pointer operating on a dial, in order'to indicate the adjustment of the iron-core 23.
A device of this kind can be greatly varied by varying the number of interruptions and independent therefrom the number of rotations of the contact-arm 14.
According to the'present invention in a device of this kind the interrupter and rheostat are connected in'series or behind each other in such a manner, that the switchingon of the resistances ofthe rheostat also acts on-the interrupter, so that on switchingon a weak resistance, thus on the passage of a stronger current, the interrupter carries out larger and correspondingly slower oscillations, while on switching-one stronger resistance the oscillations of the interrupter are smaller and quicker.
Fig. 2 illustrates graphically-the rhythmic alterations of the intensity of current and it will be seen, that sudden current-shocks cannot take place, but that the increase and decrease of the faradic current is gradual or uniform, so that the said faradic current is quite painless.
Fig. 2 also shows, that at a certain adjusted length of the interrupter-lever 6, 9, which-is carried out independent of the number of rotations of the rheostat, the frequency of the interrupter depends on the position of the contact-arm 14 at the wire 16 of the rheostat.
The connecting electrodes are sub-divided, in order to correspondingly distribute the effect of the current.
The device is quite independent of heavy current, as it can be rea 'ly worked with dry cells. p
Contrary to the known electro-therapeutlc devices, in the device according to the present invention the oscillations of the interrupter, taking place within the sine curve, adapt themselves to the work of the rheostat and also may be regulated independent of.
the rheostat. The insulated adjustment of the speed-of rotation of the arm rotating on the rheostat and the interruptions at the oscillating lever, as well as'the stepped co-.
operation of the components which are of consequence for the effect of the current are a feature of the present invention, as well as of great importance forv the therapeutic treatment.
1. An .electro-therapeutic device of the character described, comprising a source of current, aninterrupter connected with the saidsource of current, an automatic and uni formly variable rheostat connected with the interrupter, and induction means connected with the rheostat and the source of current, the vibrations of the interrupter slowly increasing and decreasing in dependency on the rheostat. v
2. An electro-therapeutic device of the character described, comprising a source of current, an interrupter connected with the source of current, an automatic and uniformly variable rheostatfconnected immediately behind the interrupter, and induction means the primary winding ofwhich is connected with therheostat and the source of current, the vibrations of the interrupter source of current, a rheoflat provided with rupter' independent of the number of rotations of the said contact-arm, and induction means connected with the rheostat and the source of current. v
5. An electro-therapeutic device of the character described, comprising a source of current, an interrupter connected with the source of current, the said interrupter comprising coils, a pivotally mounted doublearmed lever provlded with a soft-iron member at one end and a plate-spring at the otherend thereof, a contact-pm operatin on the said spring, a rack to which the said contact-pin is secured, and a toothed wheel for operating the rack, a rheostat provided .with a positively rotating c'ontactarm con nected immediately behind the interrupter,
andinduction means connected with the rheostat and the, source of current.
6. An electro-therapeutic device of the character described, comprising a dry cell, a counter connected with the latter, a switch interposed in the connection between the cell and the counter, an interrupter connected with thecounter, an automatic and uniformly variable rheostat connected with the interrupter, and induction means connected with the rheostat and the dry cell.
7. An electro-therapeutic device of the character described, comprising a source of current,-.an interrupter connected with the source of current, a rheostat connected immediately behind the interrupter, the said rheostat comprising a positively rotating contact-arm, a circular spiral-wound-resistance-wire, and a number of contact-studs connected with the resistance-wire, and induction means connected with the rheostat andthe source of current.
V 8. An electro therapeutic device of the character described, comprising a source of current, an interrupter connected with the source of current, an automatic and umformly variable rheostat connected immediately behind the interrupter, and induction means connected with the rheostat and the source of current, the said induction means co m rising a primary winding, a secondary ing, an adjustable iron-core within the f latter,-and,meana for adjusting the said core guano I for varying the intensity of the faradic, current. v
9. An electro-therapeutic device of the character described, comprising a source 01' current, an interrupter connected 'with the source ofcurrent, means on the interrupter for regulating the frequency of the inter-.
rupter, an automatic and uniformly variable rheostateonnected immediately behind the interrupter, the said rheostat comprising a rotating contact-arm, a circular spiralwound resistance-wire, and a number of contact-studs connected with the resistancewire, and induction means connected with the rheostat and the source of current.
10. An electro-therapeutic device of the character described, comprising a source of current, an interrupter connected with the source of current, a rheostat connected immediately behind the interrupter, and induc-' tion means connected with t e rheostat and the source of current, the said induction means comprising a primary winding, a secondary' winding, an adjustable iron-core within the latter, and means for adjusting the said core for varying the intensity of r the faradic current, the said means com llS- ing'a rotatable knob, a roller operate by the latter, and a string passing over the roller and secured to both ends of the said core.
11 An electro-therapeutic device of the character described, comprising a source of current, an interrupter connected with the SIEGFRIED SAMUEL EnEL.
US103370A 1925-04-20 1926-04-20 Electrotherapeutic device Expired - Lifetime US1648116A (en)

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