Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – With voltage or current conversion
Patent
1978-03-06
1979-07-17
Rolinec, Rudolph V.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
With voltage or current conversion
324 62, 324 99D, 324115, 324186, G01R 1926, G01R 2702, G04F 800
Patent
active
041616910
ABSTRACT:
Apparatus for selectively measuring voltage, resistance, and time duration f an event, each of which is associated with an electrical network, includes a device for providing a first train of digital pulses, the frequency of the pulse train being related to an analog voltage coupled thereto. The measuring apparatus also includes a clock for generating a second train of digital pulses of fixed frequency, and a constant current source to be coupled to a resistive element being measured by the apparatus. The apparatus further includes counters selectively receiving one of the digital pulse trains for counting the number of pulses received during a selected time period, and for providing a digital output in which the value of a quantity measured by the apparatus is encoded. A display coupled to the counter provides a visible numerical display of a measured value at the conclusion of the selected time period, and control means couples a plurality of binary control signals to the counters to determine the duration of each time period.
REFERENCES:
patent: 2575759 (1951-11-01), Higinbotham et al.
patent: 3064193 (1962-11-01), Grubb et al.
patent: 3978402 (1976-08-01), Ryder
Johnston Ervin F.
Karlsen Ernest F.
Rolinec Rudolph V.
Sciascia Richard S.
Skarsten James O.
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