DE592146C - Measuring instrument for high-frequency electrical treatment currents - Google Patents

Measuring instrument for high-frequency electrical treatment currents

Info

Publication number
DE592146C
DE592146C DES98373D DES0098373D DE592146C DE 592146 C DE592146 C DE 592146C DE S98373 D DES98373 D DE S98373D DE S0098373 D DES0098373 D DE S0098373D DE 592146 C DE592146 C DE 592146C
Authority
DE
Germany
Prior art keywords
measuring instrument
measuring
switched
frequency electrical
electrical treatment
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
DES98373D
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.)
Siemens Reiniger Werke AG
Original Assignee
Siemens Reiniger Werke AG
Publication date
Priority to DES98373D priority Critical patent/DE592146C/en
Application granted granted Critical
Publication of DE592146C publication Critical patent/DE592146C/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C1/00—Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing
    • B21C1/02—Drawing metal wire or like flexible metallic material by drawing machines or apparatus in which the drawing action is effected by drums
    • B21C1/04—Drawing metal wire or like flexible metallic material by drawing machines or apparatus in which the drawing action is effected by drums with two or more dies operating in series

Description

Meßinstrument für hochfrequente elektrische Behandlungsströme Die Erfindung betrifft ein Meßinstrumentfür hochfrequente elektrische Ströme, das zwei oder mehrere wahlweise einschaltbare Meßbereiche aufweist und insbesondere zur Messung des Behandlungsstromes bei medizinischen Hochfrequenzapparaten bestimmt ist. Bei solchen bekannten Meßinstrumenten ist es von Nachteil, daß beim Übergang zu einer Behandlungsart, bei der dem Hochfrequenzapparat ein stärkerer Stromentnommen wird, vergessen wird, den Meßbereich des Meßinstruments umzuschalten, so daß durch den stärkeren Strom das Meßinstrument, dessen empfindlichster Meßbereich eingeschaltet ist, beschädigt wird.Measuring instrument for high frequency electrical treatment currents Die The present invention relates to a high frequency electrical current measuring instrument, the two or has several optionally switchable measuring ranges and in particular for measurement of the treatment current in medical high-frequency apparatus is determined. at such known measuring instruments, it is disadvantageous that when transitioning to a Type of treatment that draws more electricity from the high-frequency apparatus, is forgotten to switch the measuring range of the measuring instrument, so that by the stronger current the measuring instrument whose most sensitive measuring range is switched on is damaged.

Diese Gefahr wird gemäß der Erfindung dadurch beseitigt, daß in dem Meßinstrument ein hochohmiger Widerstand oder ein Kondensator kleiner Kapazität angeordnet ist, der bei Umschaltung auf einen Meßbereich größerer Empfindlichkeit zwangsläufig vor das Meßsystem und in den Nutzstromkreis geschaltet wird und dessen Widerstand derart hoch ist, daß er auch bei Betrieb des Apparats mit hohen Leistungen und bei geringen Widerständen im Verbraucher den Strom auf Werte begrenzt, die dem Instrument nicht schaden.This risk is eliminated according to the invention in that in the Measuring instrument a high-resistance resistor or a capacitor with a small capacity is arranged, which when switching to a measuring range of greater sensitivity is inevitably switched in front of the measuring system and in the utility circuit and its Resistance is so high that it can also be used when the apparatus is operated at high powers and with low resistances in the consumer, the current is limited to values that match the Do not harm the instrument.

Das neue Meßinstrument ist in der Abbildung schematisch dargestellt.The new measuring instrument is shown schematically in the figure.

Der Stromanzeiger a (Drehspulen-Zeigergalvanometer o. dgl.) ist an das vom Behandlungsstrom ganz oder nur zum Teil durchflossene Thermoelement b angeschlossen. Parallel- zum Thermoelement wird zur Herabsetzung der Empfindlichkeit in der an sich bekannten Weise der Widerstand c geschaltet. Wird der Widerstand c nicht benutzt, also der Meßbereich mit großer Empfindlichkeit des Stromanzeigers u angewandt, so wird mittels des Umschalters d der Widerstand c ausgeschaltet und ein hochohmiger Widerstand oder ein Kondensator e von kleiner Kapazität in den das Thermoelement speisenden Stromkreis eingeschaltet.The current indicator a (moving coil pointer galvanometer or the like) is on the thermocouple b through which the treatment current flows completely or only partially is connected. Parallel to the thermocouple is used to reduce the sensitivity in the known way the resistor c switched. If the resistor c is not used, so the measuring range with great sensitivity of the current indicator u applied, see above the resistor c is switched off by means of the switch d and a high-resistance one Resistance or capacitor e of small capacitance in the the thermocouple supply circuit switched on.

Dadurch ist erreicht, daß bei Benutzung des Bereiches großer Empfindlichkeit des Meßinstruments die Stromstärke zwangsläufig herabgesetzt wird. Dies bringt zugleich den Vorteil mit sich, daß bei Anwendung schwacher Behandlungsströme die zur Regelung des Behandlungsstromes dienenden, außerhalb der neuen Einrichtung schon vorhandenen Organe eine verhältnismäßig genaue Einstellung des Behandlungsstromes zulassen. Mittels der Anschlußklemmen f, g wird das Meßinstrument in den Behandlungsstromkreis eingeschaltet.This ensures that when the area is used, great sensitivity of the measuring instrument the amperage is inevitably reduced. This brings at the same time with the advantage that when using weak treatment currents, the control the treatment flow, which already exist outside the new facility Organs allow a relatively precise adjustment of the treatment current. The measuring instrument is connected to the treatment circuit by means of the connection terminals f, g switched on.

Claims (1)

PATrNTAN SPRUCI-IMeßinstrument für hochfrequente elektrische Behandlungsströme bei medizinischen Hochfrequenzapparaten mit zwei oder mehreren wahlweise einschaltbaren Meßbereichen, dadurch gekennzeichnet, daß in dem Meßinstrument ein hochohmiger Widerstand oder ein Kondensator kleiner Kapazität angeordnet ist, der bei Umschaltung auf einen Meßbereich größerer Empfindlichkeit zwangsläufig vor das Meßsystem und in den Nutzstromkreis geschaltet wird und dessen Widerstand derart hoch ist, daß er auch bei Betrieb des Apparates mit hohen Leistungen und bei geringen Widerständen im Verbraucher den Strom auf Werte begrenzt, die dem Instrument nicht schaden. Ergänzungsblatt zur Patentschrift 592 146 Klasse 21g Gruppe 24/02. Vom Patentsucher ist als der Erfinder .angegeben worden: Ur.-Ing. Arthur Gebbert in Erlangen.PATrNTAN SPRUCI-I measuring instrument for high-frequency electrical treatment currents in the case of medical high-frequency devices with two or more that can be switched on as required Measuring areas, characterized in that there is a high-value resistor in the measuring instrument or a capacitor of small capacitance is arranged, which when switched to a Measuring range of greater sensitivity inevitably in front of the measuring system and in the utility circuit is switched and its resistance is so high that it is even when the Apparatus with high performance and low resistance in the consumer Current limited to values that do not harm the instrument. Supplementary sheet for Patent 592 146 Class 21g Group 24/02. From the patent seeker is as the inventor specified: Ur.-Ing. Arthur Gebbert in Erlangen.
DES98373D Measuring instrument for high-frequency electrical treatment currents Expired DE592146C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DES98373D DE592146C (en) Measuring instrument for high-frequency electrical treatment currents

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES98373D DE592146C (en) Measuring instrument for high-frequency electrical treatment currents

Publications (1)

Publication Number Publication Date
DE592146C true DE592146C (en) 1934-02-10

Family

ID=7521422

Family Applications (1)

Application Number Title Priority Date Filing Date
DES98373D Expired DE592146C (en) Measuring instrument for high-frequency electrical treatment currents

Country Status (1)

Country Link
DE (1) DE592146C (en)

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