Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Plural ranges – scales or registration rates
Patent
1990-04-05
1990-11-27
Karlsen, Ernest F.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Plural ranges, scales or registration rates
324103R, 324142, 364483, G01R 1164, G01R 1508, G06F 1100
Patent
active
049739018
ABSTRACT:
A method and apparatus for improving the timekeeping accuracy of a time of the use or demand of energy electronic register in an electric energy meter includes compensating for the absence of line frequency timing pulses for the period between the occurrence of a power outrage and the actuation of backup timekeeping resulting from the power supply filter capacitor discharge time. A timing counter counts minutes of line frequency timing signals by decrementing a counter which is also provided with the interval interrupt operating pulses of the electronic register such that in the absence of line frequency pulses the interval interrupt operating pulses are counted and added to electronic register timekeeping system after a power down mode of operation.
REFERENCES:
patent: 4591782 (1986-05-01), Germer
patent: 4627000 (1986-12-01), Germer
Brunson R. F.
Freedman I. M.
General Electric Company
Karlsen Ernest F.
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