Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Demand – excess – maximum or minimum
Patent
1974-12-19
1977-02-01
Rolinec, R. V.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Demand, excess, maximum or minimum
324102, G01R 1916, G01R 1900
Patent
active
040064131
ABSTRACT:
An apparatus for measuring and displaying the sag and surge voltage values of an AC power supply. Two inputs are attenuated, filtered and the peak difference is converted to a binary number by an analog-to-digital (A/D) converter. A digital comparator compares these conversions with the values stored in a maximum and minimum register. If the output of the A/D is larger than the contents of the maximum register, the previous maximum register's contents are replaced by the A/D output. If the output of the A/D is smaller than the contents of the minimum register, the previous minimum register's contents are replaced by the A/D output. Dual light emitting diode displays provide a numerical readout of the contents of the maximum and minimum registers.
REFERENCES:
patent: 2591738 (1952-04-01), Spencer
patent: 3225213 (1965-12-01), Hinrichs et al.
patent: 3502980 (1970-03-01), Baggott
patent: 3593133 (1971-07-01), Wisner
patent: 3600565 (1971-08-01), Forbes, Sr.
patent: 3733601 (1973-05-01), Oliver
Karlsen Ernest F.
Rolinec R. V.
The United States of America as represented by the Department of
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