GB710669A - Improvements in or relating to short-wave therapy apparatus - Google Patents

Improvements in or relating to short-wave therapy apparatus

Info

Publication number
GB710669A
GB710669A GB470/52A GB47052A GB710669A GB 710669 A GB710669 A GB 710669A GB 470/52 A GB470/52 A GB 470/52A GB 47052 A GB47052 A GB 47052A GB 710669 A GB710669 A GB 710669A
Authority
GB
United Kingdom
Prior art keywords
treatment circuit
coil
circuit
tune
anode
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB470/52A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Philips Electrical Industries Ltd
Original Assignee
Philips Electrical Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Philips Electrical Industries Ltd filed Critical Philips Electrical Industries Ltd
Publication of GB710669A publication Critical patent/GB710669A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/46—Dielectric heating
    • H05B6/48—Circuits
    • H05B6/50—Circuits for monitoring or control
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
    • A61N1/00—Electrotherapy; Circuits therefor
    • A61N1/40—Applying electric fields by inductive or capacitive coupling ; Applying radio-frequency signals
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
    • H03L5/00—Automatic control of voltage, current, or power
    • H03L5/02—Automatic control of voltage, current, or power of power

Landscapes

  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Radiology & Medical Imaging (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electrotherapy Devices (AREA)
  • Inverter Devices (AREA)
  • Surgical Instruments (AREA)

Abstract

710,669. Automatic frequency control systems. PHILIPS ELECTRICAL INDUSTRIES, Ltd. Jan. 7, 1952 [Jan. 9, 1951], No. 470/52. Class 38(4) The treatment circuit of a short-wave medical apparatus is kept in resonance with the oscillations of a frequencystabilized 'source by comparing the phase of the voltages in the source and the treatment circuits, and deriving therefrom a control voltage for corrective adjustment of a tuning impedance in the treatment circuit. As shown in the diagram, the tuned circuit 8 of the h.f. source is inductively coupled to the treatment circuit 21, 22. A phase-comparing valve 1 which may be of the nonode type has one control grid 5 energized by a coil 7 coupled to the circuit 8, and the other control grid 6 coupled by a coil 11 in the treatment circuit. When the treatment circuit is in tune the two grids are excited in quadraturo relation. and departure from this relation increases or decreases the relative phase angle, and correspondingly affects the anode current through the resistor 3. A second phasecomparing valve 2 has its grids 5, 6 excited in constant quadrature relation, one directly by the coil 7 and the other by a tune circuit 9. 10 connected to the coil 7 by a condenser 23. The anode current through the resistor 4 thus balances the current through resistor 3 when the treatment circuit is in tune. Departure from correct tune creates a difference of voltage between the anode points 12, 13 and causes the anode current of one of the valves 15, 17 to predominate. A motor 20 is thus started up in one or other direction, according to which the opposed field-coils 18, 19 carries the greater current. The motor 20 adjusts a tuning-condenser 21 or other element of the treatment circuit to bring it to resonance. Alternatively the anode currents of the valves 15, 17 may operate a polarized relay by means of which a device for adusting the condenser 21 is controlled. The treating element may comprise capacitor electrodes or a coil.
GB470/52A 1951-01-09 1952-01-07 Improvements in or relating to short-wave therapy apparatus Expired GB710669A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEP4919A DE971636C (en) 1951-01-09 1951-01-09 Shortwave device for therapeutic purposes

Publications (1)

Publication Number Publication Date
GB710669A true GB710669A (en) 1954-06-16

Family

ID=6093782

Family Applications (1)

Application Number Title Priority Date Filing Date
GB470/52A Expired GB710669A (en) 1951-01-09 1952-01-07 Improvements in or relating to short-wave therapy apparatus

Country Status (6)

Country Link
US (1) US2698622A (en)
BE (1) BE508264A (en)
CH (1) CH300414A (en)
DE (1) DE971636C (en)
FR (1) FR1047550A (en)
GB (1) GB710669A (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2937640A (en) * 1951-11-02 1960-05-24 Siemens Reiniger Werke Ag Ultrasonic apparatus for medical treatment purposes
FR1118061A (en) * 1954-06-14 1956-05-31 Electromedica Control panel for electrotherapy applications, in particular for stimulotherapy
US3096768A (en) * 1960-05-27 1963-07-09 Tron Inc Fa Electrotherapy system
US4210152A (en) * 1978-05-01 1980-07-01 International Medical Electronics Ltd. Method and apparatus for measuring and controlling the output power of a shortwave therapy apparatus
US4709701A (en) * 1986-04-15 1987-12-01 Medical Research & Development Associates Apparatus for medical treatment by hyperthermia
US7627381B2 (en) 2004-05-07 2009-12-01 Therm Med, Llc Systems and methods for combined RF-induced hyperthermia and radioimmunotherapy
US7510555B2 (en) 2004-05-07 2009-03-31 Therm Med, Llc Enhanced systems and methods for RF-induced hyperthermia
US20130153440A9 (en) * 2006-11-13 2013-06-20 Kc Energy, Llc Rf systems and methods for processing salt water
DE102012025164A1 (en) * 2012-12-21 2014-06-26 Fresenius Medical Care Deutschland Gmbh Apparatus for removing protein-bound toxins from blood plasma

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE356917C (en) * 1922-08-14 Siemens & Halske Akt Ges Method for making electrical waves of high frequency audible
DE663548C (en) * 1933-01-17 1938-08-09 Tiberius Reiter Dr Device for treatment with short-wave electrical oscillations
FR763868A (en) * 1933-02-03 1934-05-08 Soc Fr Radioelectrique New homodyne reception process
DE737011C (en) * 1935-05-05 1943-07-03 Electricitaetsgesellschaft San Device for coordinating a treatment circuit with Lecher's system with the excitation circuit in shortwave or ultra-shortwave therapy devices
US2396004A (en) * 1943-11-24 1946-03-05 Weston Electrical Instr Corp High-frequency dielectric heating apparatus
US2473188A (en) * 1944-06-17 1949-06-14 Rca Corp Radio-frequency dielectric heater with constant heating rate control
US2467285A (en) * 1944-07-12 1949-04-12 Rca Corp High-frequency generating system
US2470443A (en) * 1944-07-21 1949-05-17 Mittelmann Eugene Means for and method of continuously matching and controlling power for high-frequency heating of reactive loads
GB611710A (en) * 1944-10-10 1948-11-03 Stanley Francis Warren Improvements in radio frequency heating, particularly for the permanent waving of hair
US2508321A (en) * 1945-09-05 1950-05-16 Raymond M Wilmotte Method and means of controlling electronic heating

Also Published As

Publication number Publication date
BE508264A (en) 1952-07-07
FR1047550A (en) 1953-12-15
DE971636C (en) 1959-03-05
US2698622A (en) 1955-01-04
CH300414A (en) 1954-07-31

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