Method and apparatus for the measurement of electric currents an

Details Method and apparatus for the measurement of electric currents an Method and apparatus for the measurement of electric currents an

1979-02-09

1980-11-25

Krawczewicz, Stanley T.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Demand, excess, maximum or minimum

G01R 1900, G01R 1916

Patent

active

042361117

ABSTRACT:
Here, a means is to be created with which quick alterations in the signal behavior are grasped and displayed. Even with the use of peak value meters with very large time constants, such quick alterations are also to be used for the quick correction of the peak value display. In an exemplary embodiment, each separately registered current or voltage value from an individual current or, respectively, voltage circuit is compared at a comparator specifically allocated to it with a mean value which is formed from the current or, respectively, voltage values of all participating current or, respectively, voltage circuits. Upon nonequality of the current or, respectively, voltage values with the mean value within a predeterminable limit, the output signals of the comparators are then brought to display at a separately allocated display element. The invention is used particularly for the measurement of the peak value of middle frequency currents in middle frequency current circuits in electromedical interference current therapy.

REFERENCES:
patent: 3775675 (1973-11-01), Freeze et al.
patent: 3846692 (1974-11-01), Hill
patent: 3903470 (1975-09-01), Mirabile et al.
patent: 4023574 (1977-05-01), Nemec
patent: 4074149 (1978-02-01), Naaijer
patent: 4166245 (1979-08-01), Roberts

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