US3270746A - High-performance electrotherapeutic treatment head - Google Patents
High-performance electrotherapeutic treatment head Download PDFInfo
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- US3270746A US3270746A US304468A US30446863A US3270746A US 3270746 A US3270746 A US 3270746A US 304468 A US304468 A US 304468A US 30446863 A US30446863 A US 30446863A US 3270746 A US3270746 A US 3270746A
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- secondary coil
- shell
- partition
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- coil
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/02—Radiation therapy using microwaves
- A61N5/04—Radiators for near-field treatment
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N1/00—Electrotherapy; Circuits therefor
- A61N1/02—Details
- A61N1/04—Electrodes
- A61N1/06—Electrodes for high-frequency therapy
Definitions
- the head comprises a metallic shell having a longitudinal axis, dielectric partition structure extending generally laterally within the shell, spaced apart primary and secondary coils carried Within the shell to extend about the shell axis, and a capacitor carried within the shell and having electrically parallel connection with the secondary coil, the partition being such as to dielectrically shield the coils from each other and the exposed primary coil input connection from the secondary coil.
- the coils extend within a plate-like partition containing grooving receiving the coils, the coil arrangement being such as to substantially reduce the risk of undesired high voltage arcing.
- the spacing between the primary coil high voltage connections and the nearest locus of the secondary coil is such that the maximum voltages at said connection and locus are substantially reduced below the maximum voltages developed at the secondary coil terminals.
- the coils extend at opposite sides of the partition structure in such manner that the partition dielectrically shields the coils from each other and the primary coil input connection from the secondary coil.
- the tuning capacitor has a factory settable connection exposed toward the head cover for fine adjustment prior to closure of the shell by application of the cover, one plate of the capacitor and one high voltage terminal of the secondary coil having approximately Zero length connection to reduce the risk of arcing.
- FIGURE 1 is an elevation taken in section through the high-performance treatment head
- FIGURE 2 is a section taken on lines 22 of FIG- URE 1;
- FIGURE 3 is a view like FIGURE 1 showing a modified head
- FIGURES 4 and 5 are sections taken on lines 4-4 and 55 of FIGURE 3;
- FIGURE 6 is a section taken on lines 6-6 of FIGURE 5;
- FIGURE 7 is a schematic showing of the circuit associated With the FIG. 1 head. 7
- the head is shown in the form of a generally cylindrical metallic shell 10 having a front opening 11 and a closed rear Wall 12 supported by a rod or similar member 13.
- an assembly 15 is received through the opening 11 into the shell interior 14, the assembly including a dielectric partition 16 extending generally laterally within the shell and supported at its periphery by suit-able brackets 17 and fasteners 18.
- the partition illustrated includes a first dielectric plate 19 containing spiral grooving 20 and 21 opening toward and covered by a second partition plate 22.
- the grooving 20 receives the turns of a secondary coil 23 spiraling about the longitudinal axis 24 and the shell.
- the grooving 21 receives the single turn primary coil 27 which is in the interstitial space defined by axial cylinders passing through the successive turns of the secondary coil. Further, the primary and secondary coils have approximately coincident centers at the general location 25.
- the head structure also includes a capacitor 26 carried Within the shell and having electrical parallel con nection with the secondary coil.
- the capacitor includes a pair of plates 28 and 29 projecting in parallel planes generally normal to the lateral extent of the partition 15, the plates being carried by a dielectric block 30 which is suitably attached to the partition at 31, as by bonding thereto.
- the partition and block may comprise a suitable plastic dielectric material, such as Lucite.
- the plate 29 is shown as electrically connected at 32 to the outer terminal 33 of the secondary coil, while the plate 28 is connected at 34 to the inner terminal 35 of the secondary coil.
- the spacing of the plates may be factory set by adjustment of a threaded fastener 36 interconnecting the plates, the fastener being non-conductive.
- the primary coil has a high voltage input connection 37 to which a series of high voltage pulses are transmitted through an input capacitor 38, the means for transmitting the pulses being generally indicated at 39 in FIGURE 7.
- Such means is of the type described in our pending application refered to above.
- the partition structure 15, and in particular the plate 19 dielectric-ally shields the coils 23 and 27 from each other and from the shell, and that the plate 719 also shields the exposed primary coil input connection 37 from the secondary coil. Additional dielectric shielding is offered by the tubular plastic sheathing 40 about the primary coil turn, and also about the extent of the primary coil connection seen at 40a in FIGURE 1.
- connection 37 and the nearest locus, say locus 41, of the secondary coil is such that the maximum voltages at said locus and connection are substantially reduced below the maximum voltages developed at the secondary coil terminals 35 and 33.
- the length of the secondary coil is such that maximum voltages exist at the terminals 35 and 33 thereof, Whereas an approximately null voltage point exists substantially midway between opposite terminals of the secondary coil as measured along the coil length.
- Said null voltage point may, for example, be in the region 43, FIGURE 2.
- said nearest locus 41 of the secondary coil is spaced closer to the null voltage region 43 than to the terminals 35 and 33, as measured along the secondary coil length. As brought out above, this condition substantially reduces the risk of unwanted arcing.
- the shell 10 is generally the same as the shell shown in FIGURE 1, a front non-metallic cover 44 for the shell also being generally the same.
- the dielectric partition 45 in this form of the invention extends generally laterally within the shell between the primary coil 46 at the rear of the partition and the secondary coil 47 at the front of the partition.
- the coils are carried by dielectric blocks 48 and 49, as illustrated, with suitable grooves or openings being formed in the blocks to receive the coil turns.
- Blocks 48 and 49 may be formed of the same dielectric material as the partition 45 to which they are bonded, the material typically comprising Lucite. Accordingly, the partition structure dielectrically shields the coils from each other, and it is also seen that the partition shields the primary coil input connection 50 from the secondary coil.
- the latter has high voltage terminals 51 and 52 respectively connected to the plates 53 and 54 of the capacitor 55, said plates extending in planes generally parallel to the partition 45 and at the front thereof.
- Terminal 51 is seen to have zero length connection at 56 to plate 53, to minimize unwanted electrical effects at high frequency.
- the plates of the capacitor may be adjusted to flex toward or away from each other at the factory by means of a fastener 57 the head of which is exposed toward the cover 44.
- Pulses transmit ted by the means 39 are typically characterized as having frequencies of 27.12 megacycles, the pulse interval being, for example, .001 to .025 second.
- a metallic shell having a longitudinal axis, spaced apart primary and secondary coils, the primary coil having a high voltage input connection, insulative tubular sheathing about the primary coil, dielectric means carried by said shell and supporting both coils to extend about said axis, and a capacitor carried by said dielectric means generally rearwardly of said coils within the shell and electrically connected across the secondary coil, the capacitor having two generally parallel plates with edge portions attached to said dielectric means to prevent their relative displacement, major portions of the plates extending freely away from said edge portions to flex toward and away from each other, and a non-conductive fastener carried by said major portions of the plates in spaced relation to said plate edge portions to hold said major portions of the plates at adjusted separation, said fastener extending between the plates for attachment thereto, the secondary coil having more turns than the primary coil and both primary and secondary coils comprising circular cross section wire.
Description
Sept. 6, 1966 w. D. KENDALL ET AL 3,270,746
HIGH-PERFORMANCE ELECTROTHERAPEUTIC TREATMENT HEAD Filed Aug. 26, 1963 5 SheetsSheet l YINVEINTOR. mLLMM DEM: 1554/0444 1:64AM .4. H265? m S p 19% w. D. KENDALL ET AL 3,270,?46
HIGH-PERFORMANCE ELECTROTHERAPEUTIC TREATMENT HEAD Filed Aug. 26, 1963 3 Sheets-Sheet 2 I NVEN TOR.
Sept. 6, 1966 w. D. KENDALL ET AL 3,270,746
HIGH-PERFORMANCE ELECTROTHERAPEUTIC TREATMENT HEAD Filed Aug. 26, 1963 5 Sheets-$heet 5 INVENTOR. PULL/4M BEA/451K END/4L1. A Emu/r 44 X42649? Y M ,r AW
United States Patent 3,270,746 HIGH-PERFORMANCE ELECTROTHERAPEUTIC TREATMENT HEAD William Denis Kendall, Los Angeles, and Frank A. Yarger, Sylmar, Califi, assignors to Dynapower Systems Corporation, Los Angeles, Calif., a corporation of Delaware Filed Aug. 26, 1963, Ser. No. 304,468 1 Claim. (Cl. 128-404) This invention relates generally to electrotherapeutic apparatus, and more particularly concerns what may be characterized as high-performance treatment heads.
In our US. patent application Ser. No. 294,822, filed July 15, 1963, we have described apparatus for generating, controlling and transmitting electrical pulses of high frequency for application to a patient by means of a treatment head. The latter is supplied with high voltage which is increased even further by means of high voltage primary and secondary coils. Operating voltages at the head, and power transmitting efiiciency are limited by the tendency for arcing to occur between the coils, and particularly at the coil terminal connections. Decreased safety to the operator and patient, as Well as less than desirably satisfactory treatment of the patient, are also involved in the design of prior treatment heads of which we are aware.
The present invention contemplates solutions to the above problems which, apart from the distinct benefits realized, are characterized by novel and unusual advances in head construction, mode of operation and results obtained in use. Broadly considered, the head comprises a metallic shell having a longitudinal axis, dielectric partition structure extending generally laterally within the shell, spaced apart primary and secondary coils carried Within the shell to extend about the shell axis, and a capacitor carried within the shell and having electrically parallel connection with the secondary coil, the partition being such as to dielectrically shield the coils from each other and the exposed primary coil input connection from the secondary coil.
In one form of the invention, the coils extend within a plate-like partition containing grooving receiving the coils, the coil arrangement being such as to substantially reduce the risk of undesired high voltage arcing. As to the latter, the spacing between the primary coil high voltage connections and the nearest locus of the secondary coil is such that the maximum voltages at said connection and locus are substantially reduced below the maximum voltages developed at the secondary coil terminals. This feature permits the locating of the primary coil in the interstitial space defined by axial cylinders passing through the successive turns of the secondary coil, with the coils having approximately coincident centers, as will be seen.
- Accordingly, the construction of the head is simplified,
and its operating efficiency is increased, higher voltages being usable for more eifective treatment, all Without increased risk of arcing or other danger to safety.
In another form of the invention, the coils extend at opposite sides of the partition structure in such manner that the partition dielectrically shields the coils from each other and the primary coil input connection from the secondary coil. Also, the tuning capacitor has a factory settable connection exposed toward the head cover for fine adjustment prior to closure of the shell by application of the cover, one plate of the capacitor and one high voltage terminal of the secondary coil having approximately Zero length connection to reduce the risk of arcing.
These and other objects and advantages of the invention, as well as the details of an illustrative embodiment,
will be more fully understood from the following detailed description of the drawings, in which:
FIGURE 1 is an elevation taken in section through the high-performance treatment head;
FIGURE 2 is a section taken on lines 22 of FIG- URE 1;
FIGURE 3 is a view like FIGURE 1 showing a modified head;
FIGURES 4 and 5 are sections taken on lines 4-4 and 55 of FIGURE 3;
FIGURE 6 is a section taken on lines 6-6 of FIGURE 5; and
FIGURE 7 is a schematic showing of the circuit associated With the FIG. 1 head. 7 In the drawings, the head is shown in the form of a generally cylindrical metallic shell 10 having a front opening 11 and a closed rear Wall 12 supported by a rod or similar member 13. Referring to FIGURES 1 and 2, an assembly 15 is received through the opening 11 into the shell interior 14, the assembly including a dielectric partition 16 extending generally laterally within the shell and supported at its periphery by suit-able brackets 17 and fasteners 18. The partition illustrated includes a first dielectric plate 19 containing spiral grooving 20 and 21 opening toward and covered by a second partition plate 22. The grooving 20 receives the turns of a secondary coil 23 spiraling about the longitudinal axis 24 and the shell. The grooving 21 receives the single turn primary coil 27 which is in the interstitial space defined by axial cylinders passing through the successive turns of the secondary coil. Further, the primary and secondary coils have approximately coincident centers at the general location 25.
The head structure also includes a capacitor 26 carried Within the shell and having electrical parallel con nection with the secondary coil. For this purpose, the capacitor includes a pair of plates 28 and 29 projecting in parallel planes generally normal to the lateral extent of the partition 15, the plates being carried by a dielectric block 30 which is suitably attached to the partition at 31, as by bonding thereto. In this regard, the partition and block may comprise a suitable plastic dielectric material, such as Lucite. The plate 29 is shown as electrically connected at 32 to the outer terminal 33 of the secondary coil, while the plate 28 is connected at 34 to the inner terminal 35 of the secondary coil. Finally, the spacing of the plates may be factory set by adjustment of a threaded fastener 36 interconnecting the plates, the fastener being non-conductive.
The primary coil has a high voltage input connection 37 to which a series of high voltage pulses are transmitted through an input capacitor 38, the means for transmitting the pulses being generally indicated at 39 in FIGURE 7. Such means is of the type described in our pending application refered to above. In this regard, it will be seen that the partition structure 15, and in particular the plate 19, dielectric-ally shields the coils 23 and 27 from each other and from the shell, and that the plate 719 also shields the exposed primary coil input connection 37 from the secondary coil. Additional dielectric shielding is offered by the tubular plastic sheathing 40 about the primary coil turn, and also about the extent of the primary coil connection seen at 40a in FIGURE 1.
It is an important feature of the invention that the spacing between the connection 37 and the nearest locus, say locus 41, of the secondary coil is such that the maximum voltages at said locus and connection are substantially reduced below the maximum voltages developed at the secondary coil terminals 35 and 33. In this regard,
the length of the secondary coil is such that maximum voltages exist at the terminals 35 and 33 thereof, Whereas an approximately null voltage point exists substantially midway between opposite terminals of the secondary coil as measured along the coil length. Said null voltage point may, for example, be in the region 43, FIGURE 2. Thus, said nearest locus 41 of the secondary coil is spaced closer to the null voltage region 43 than to the terminals 35 and 33, as measured along the secondary coil length. As brought out above, this condition substantially reduces the risk of unwanted arcing.
Referring now to FIGURES 3-6, the shell 10 is generally the same as the shell shown in FIGURE 1, a front non-metallic cover 44 for the shell also being generally the same. The dielectric partition 45 in this form of the invention extends generally laterally within the shell between the primary coil 46 at the rear of the partition and the secondary coil 47 at the front of the partition. The coils are carried by dielectric blocks 48 and 49, as illustrated, with suitable grooves or openings being formed in the blocks to receive the coil turns. Blocks 48 and 49 may be formed of the same dielectric material as the partition 45 to which they are bonded, the material typically comprising Lucite. Accordingly, the partition structure dielectrically shields the coils from each other, and it is also seen that the partition shields the primary coil input connection 50 from the secondary coil. The latter has high voltage terminals 51 and 52 respectively connected to the plates 53 and 54 of the capacitor 55, said plates extending in planes generally parallel to the partition 45 and at the front thereof. Terminal 51 is seen to have zero length connection at 56 to plate 53, to minimize unwanted electrical effects at high frequency. The plates of the capacitor may be adjusted to flex toward or away from each other at the factory by means of a fastener 57 the head of which is exposed toward the cover 44.
It will be seen that the connections of the secondary coil to the capacitor in both forms of the invention are quite short, thereby minimizing the undesirable effects of cross polarization. Also the adjustment of the capacitor can be carried out with minimum risk of arcing, in view of the capacitor positions.
Reference to FIGURE 7 shows the electrical schematic of the circuit incorporated in the head. Pulses transmit ted by the means 39 are typically characterized as having frequencies of 27.12 megacycles, the pulse interval being, for example, .001 to .025 second.
We claim:
In electrotherapeutic treatment head structure, a metallic shell having a longitudinal axis, spaced apart primary and secondary coils, the primary coil having a high voltage input connection, insulative tubular sheathing about the primary coil, dielectric means carried by said shell and supporting both coils to extend about said axis, and a capacitor carried by said dielectric means generally rearwardly of said coils within the shell and electrically connected across the secondary coil, the capacitor having two generally parallel plates with edge portions attached to said dielectric means to prevent their relative displacement, major portions of the plates extending freely away from said edge portions to flex toward and away from each other, and a non-conductive fastener carried by said major portions of the plates in spaced relation to said plate edge portions to hold said major portions of the plates at adjusted separation, said fastener extending between the plates for attachment thereto, the secondary coil having more turns than the primary coil and both primary and secondary coils comprising circular cross section wire.
References Cited by the Examiner UNITED STATES PATENTS 7/ 1962 Milinowski 128-422 2/1965 Kendall et al. 128404
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US304468A US3270746A (en) | 1963-08-26 | 1963-08-26 | High-performance electrotherapeutic treatment head |
| GB32899/64A GB1030918A (en) | 1963-08-26 | 1964-08-12 | Improvements in or relating to electrotherapeutic apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US304468A US3270746A (en) | 1963-08-26 | 1963-08-26 | High-performance electrotherapeutic treatment head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US3270746A true US3270746A (en) | 1966-09-06 |
Family
ID=23176646
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US304468A Expired - Lifetime US3270746A (en) | 1963-08-26 | 1963-08-26 | High-performance electrotherapeutic treatment head |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US3270746A (en) |
| GB (1) | GB1030918A (en) |
Cited By (49)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3978864A (en) * | 1965-10-11 | 1976-09-07 | L. B. Smith Estates, Inc. | Electrotherapeutic treatment head |
| DE3813902A1 (en) * | 1987-06-15 | 1988-12-29 | Matsushita Electric Works Ltd | PORTABLE BATTERY POWERED ELECTROMAGNETIC THERAPY APPLICATOR |
| US5370680A (en) * | 1992-05-27 | 1994-12-06 | Magnetic Resonance Therapeutics, Inc. | Athermapeutic apparatus employing electro-magnetic fields |
| WO1996004957A1 (en) * | 1994-08-17 | 1996-02-22 | Electropharmacology, Inc. | Electrotherapeutic system |
| US5584863A (en) * | 1993-06-24 | 1996-12-17 | Electropharmacology, Inc. | Pulsed radio frequency electrotherapeutic system |
| US7162303B2 (en) | 2002-04-08 | 2007-01-09 | Ardian, Inc. | Renal nerve stimulation method and apparatus for treatment of patients |
| US7617005B2 (en) | 2002-04-08 | 2009-11-10 | Ardian, Inc. | Methods and apparatus for thermally-induced renal neuromodulation |
| US7620451B2 (en) | 2005-12-29 | 2009-11-17 | Ardian, Inc. | Methods and apparatus for pulsed electric field neuromodulation via an intra-to-extravascular approach |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2193099A (en) * | 1986-02-25 | 1988-02-03 | Lund Science Ab | Electromagnetic applicator |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3043310A (en) * | 1959-04-24 | 1962-07-10 | Diapulse Mfg Corp Of America | Treatment head for athermapeutic apparatus |
| US3168098A (en) * | 1962-07-02 | 1965-02-02 | Dynapower Systems Corp | Electrotherapeutic treatment head |
-
1963
- 1963-08-26 US US304468A patent/US3270746A/en not_active Expired - Lifetime
-
1964
- 1964-08-12 GB GB32899/64A patent/GB1030918A/en not_active Expired
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3043310A (en) * | 1959-04-24 | 1962-07-10 | Diapulse Mfg Corp Of America | Treatment head for athermapeutic apparatus |
| US3168098A (en) * | 1962-07-02 | 1965-02-02 | Dynapower Systems Corp | Electrotherapeutic treatment head |
Cited By (137)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3978864A (en) * | 1965-10-11 | 1976-09-07 | L. B. Smith Estates, Inc. | Electrotherapeutic treatment head |
| DE3813902A1 (en) * | 1987-06-15 | 1988-12-29 | Matsushita Electric Works Ltd | PORTABLE BATTERY POWERED ELECTROMAGNETIC THERAPY APPLICATOR |
| US4942884A (en) * | 1987-06-15 | 1990-07-24 | Matsushita Electric Works, Ltd. | Portable battery powered electromagnetic therapy application |
| US5370680A (en) * | 1992-05-27 | 1994-12-06 | Magnetic Resonance Therapeutics, Inc. | Athermapeutic apparatus employing electro-magnetic fields |
| US5584863A (en) * | 1993-06-24 | 1996-12-17 | Electropharmacology, Inc. | Pulsed radio frequency electrotherapeutic system |
| WO1996004957A1 (en) * | 1994-08-17 | 1996-02-22 | Electropharmacology, Inc. | Electrotherapeutic system |
| US9314630B2 (en) | 2002-04-08 | 2016-04-19 | Medtronic Ardian Luxembourg S.A.R.L. | Renal neuromodulation for treatment of patients |
| US8551069B2 (en) | 2002-04-08 | 2013-10-08 | Medtronic Adrian Luxembourg S.a.r.l. | Methods and apparatus for treating contrast nephropathy |
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