Multiple range peak reading voltmeter

Details Multiple range peak reading voltmeter Multiple range peak reading voltmeter

1976-09-27

1979-03-06

Rolinec, Rudolph V.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Demand, excess, maximum or minimum

324115, 324119, 324133, G01R 1904, G01R 1914, G01R 1508

Patent

active

041433173

ABSTRACT:
A voltmeter for selectively indicating the polarity and magnitude of a peak value of voltage. The voltmeter comprises an ammeter, a diode bridge including positive and negative terminals and first and second probe terminals, a capacitor connected to the positive and negative terminals, and variable resistance switching means connected in series between one of the positive and negative terminals and the ammeter for selectively coupling the ammeter across the positive and negative terminals. Filter switching means are provided for selectively coupling the probe terminals to a single polarity of the voltage whereby the voltmeter affords charging of the capacitor so that the magnitude of the positive voltage differential between the positive and negative terminals is substantially equal to the magnitude of the peak value of the single polarity of voltage coupled to the probe terminals.

REFERENCES:
patent: 2478966 (1949-08-01), Gilbert
patent: 2654860 (1953-10-01), Lewis
patent: 3201754 (1965-08-01), Reiner et al.
patent: 3281692 (1966-10-01), Beroset
patent: 3345562 (1967-10-01), Rockwell
patent: 3746984 (1973-07-01), Cerveny

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