DE619774C - Diathermy machine with thermogalvanometer - Google Patents

Diathermy machine with thermogalvanometer

Info

Publication number
DE619774C
DE619774C DEO19554D DEO0019554D DE619774C DE 619774 C DE619774 C DE 619774C DE O19554 D DEO19554 D DE O19554D DE O0019554 D DEO0019554 D DE O0019554D DE 619774 C DE619774 C DE 619774C
Authority
DE
Germany
Prior art keywords
thermogalvanometer
thermocouple
current
magnet
diathermy
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
DEO19554D
Other languages
German (de)
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.)
Electricitaets Gesellschaft Sanitas mbH
Original Assignee
Electricitaets Gesellschaft Sanitas mbH
Publication date
Priority to DEO19554D priority Critical patent/DE619774C/en
Application granted granted Critical
Publication of DE619774C publication Critical patent/DE619774C/en
Expired legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
    • A61N5/00—Radiation therapy

Landscapes

  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Pathology (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)
  • Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)

Description

Diathermieapparat mit Thermogalvanometer Die Erfindung bezieht sich, -auf Diathermieapparate, insbesondere für - zahnärztliche Zwecke, bei denen die Strommessung -aus Gründender Genauigkeit bei dien verwendeten kleinen Stromstärken mittels eines. mit einem Thermoelement verbundenen Drehsp.ulgalvanomete-rs erfolgt. Da bei derartigen Instrumenten Drehspule und Magnet sehr eng zusammenlegen, besteht infolge der hohen hochfrequenten Leerlaufspannung im Behandlungskreise die Gefahr, daß Überschläge zwischen :beiden Teilen eintreten. Diese Gefahr könnte dadurch vermieden werden,.daß man die nicht stromführenden Metellteile des Instrumentes, wie Magnet, Skala üsw., auf hochfrequante Spannung bringt. Diese Maßnähme kann aber wieder durch hochfrequente Ausstrahlungen dieser Teile zu Fälschungen der Stromanzeige des Instrumentes führen.Diathermy apparatus with thermogalvanometer The invention relates to -on diathermy apparatus, especially for - dental purposes where the Current measurement - for reasons of accuracy with the small currents used by means of a. Rotating coil galvanometer connected to a thermocouple takes place. Since the moving coil and magnet are very close together in such instruments, there is due to the high high-frequency open circuit voltage in the treatment circuit there is a risk of that flashovers occur between: both parts. This could avoid this risk that the non-current-carrying metal parts of the instrument, such as the magnet, Scale, etc., brings to high-frequency voltage. This measure can go through again high-frequency emissions from these parts lead to falsification of the instrument's current display to lead.

Erfindungsgemäß wenden diese Schnvierigkeiten dadurch beseitigt, dä,ß, die nicht stromführenden Metallteile dies Meßsystems, wie z. B. Magnet, Skala usw., vor dem Thermoelement (vom Schwingungserzeuger aus gesehen) an -den Stromkreis angeschlossen werden. Dadurch wird erreicht, &ß die Metallteille unter hochfrequenter Spannung stehen, also Überschläge zwischen ihnen und der Drehspule ausgeschlossen sind, und daß andererseits die von ihnen ausgehenden Hochfrequenzausstrahlungen keinen Einfluß auf .den _,Ausschlog des Meßsystems haben, da j a der Verluststrom nicht über das Thermoelement fließt.According to the invention, these difficulties are eliminated by the fact that the non-current-carrying metal parts of this measuring system, such as. B. Magnet, scale, etc., connected to the circuit in front of the thermocouple (seen from the vibration generator) will. This ensures that the metal parts are under high-frequency tension stand, so flashovers between them and the moving coil are excluded, and that on the other hand the radiofrequency emissions emanating from them have no influence on .den _, logging out of the measuring system, since yes the leakage current does not exceed the Thermocouple flows.

Ein Ausführuntsbeispiel gemäß der Erfindung ist in der AbbLdüng dergestellt, die schematisch ein für Diathermicapparate benutztes Thermogalvanometer zeigt. Mit i ist der Magnet mit- den Poilschuhen a, -mit g die Drehspule mit der Stromzuführungsfedern4, mit 5 die Skala des Instrumentes, mit 6 der auf der Drehspule sitzende Zeiger, mit 7 das Thermoelement bezeichnet. Die Stromrichtung .des Hochfrequenzstromes ist durch Pfeile angedeutet. Der Magnet i und die Skala 5 sind vor &--m Thermoellement 7 an den Stromkreis angeschlossen, so daß der von ihnen ausgehende Verluststrom nicht über das Thermoeleinent fließt.An embodiment according to the invention is shown in the FigLdüng, which shows schematically a thermogalvanometer used for diathermic apparatus. I with the magnet is with- the Poilschuhen a, - with g is the spinning reel with the Stromzuführungsfedern4, with 5 the scale of the instrument, with the 6 seated on the spinning reel pointer 7 indicates the thermocouple. The direction of flow of the high-frequency current is indicated by arrows. The magnet i and the scale 5 are connected to the circuit in front of the thermocouple 7, so that the leakage current from them does not flow through the thermocouple.

Claims (1)

PATENTANSPRUCH: Diathermieapparat, insbesondere für zahnärztliche Zwecke, mit einem Thermogalvanometer, daidurch gekennzeichnet, daß die nicht stromführenden Metallteile des Meßsysterns vor dem Thermoelement (vom Schwingungserzeuger aus gesehen) an den Stromkreis angeschlossen sind.PATENT CLAIM: Diathermy apparatus, especially for dental use Purposes, with a thermogalvanometer, characterized in that the non-current-carrying Metal parts of the measuring system in front of the thermocouple (seen from the vibration generator) are connected to the circuit.
DEO19554D Diathermy machine with thermogalvanometer Expired DE619774C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEO19554D DE619774C (en) Diathermy machine with thermogalvanometer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEO19554D DE619774C (en) Diathermy machine with thermogalvanometer

Publications (1)

Publication Number Publication Date
DE619774C true DE619774C (en) 1935-10-10

Family

ID=7355022

Family Applications (1)

Application Number Title Priority Date Filing Date
DEO19554D Expired DE619774C (en) Diathermy machine with thermogalvanometer

Country Status (1)

Country Link
DE (1) DE619774C (en)

Similar Documents

Publication Publication Date Title
DE619774C (en) Diathermy machine with thermogalvanometer
DE346082C (en) Method and device for determining the yield strength of magnetic materials
DE386707C (en) Method for measuring the capacitance and the dielectric loss angle of capacitors and cables using the compensation principle
DE650141C (en) Arrangement for measuring the direct current flowing in a high-voltage system for operating discharge tubes, in particular Roentgen tubes, by means of a moving-coil measuring instrument
DE679637C (en) Method and device for displaying differences in radiation by means of a gas line in the manner of a so-called counting chamber
DE824710C (en) Switching on balancing machines with electrical display for the purpose of speed measurement
DE364206C (en) Method for point-by-point recording of alternating current curves
DE408076C (en) Circuit arrangement and method for determining or adjusting loudness in hearing tests
DE543587C (en) Device to compare two impedances with a certain approximation
DE841480C (en) Device for determining the high-frequency energy converted in the treatment object during treatment with short-wave or ultra-short-wave electrical oscillations
DE475071C (en) Method for the electrical summation of variable measured quantities
DE171674C (en)
DE596534C (en) Device for dosing diathermy currents, especially short-wave currents
DE521555C (en) Procedure for measuring apparent power and counting apparent work
DE844487C (en) Arrangement for measuring current or voltage harmonics
DE498675C (en) Device for testing the compensation of the earth fault current achieved by earth fault coils
DE407308C (en) Electrostatic voltmeter or voltage indicator
DE756093C (en) Method for measuring the resonance resistance of piezo crystals oscillating in their natural frequency, in particular quartz crystals of low frequency
DE852310C (en) Method and device for determining the control of the composition and purity of liquid mixtures
DE544110C (en) Device for the detection of short-circuited turns of coils
DE762034C (en) Device for displaying the phase position and size of an imbalance
DE336836C (en) Circuit arrangement for the dosage of electrical currents for the treatment of sick people
DE678204C (en) Arrangement for testing and measuring capacitors in an electron tube circuit
DE934426C (en) Display device for adjusting the secondary oscillation circle to the primary circle in devices for treatment with short-wave electrical oscillations
DE495200C (en) Device for the electrical testing of overhead lines, supply and overland lines by means of variable voltage and measurement of voltage, current strength and phase shift