Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Demand – excess – maximum or minimum
Patent
1984-04-12
1986-05-27
Karlsen, Ernest F.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Demand, excess, maximum or minimum
324116, 365228, 371 66, G01R 1164, G01R 1508, G06F 1100
Patent
active
045917825
ABSTRACT:
An electronic register for an electric meter includes a non-volatile storage into which data is written upon the detection of an impending power outage. A sufficient quantity of electric energy is normally stored in a capacitor to continue operation of the electronic register for a long enough period of time to complete the writing of data to the non-volatile storage. In order to prevent writing of the data to non-volatile storage in the presence of noise or momentary power outages, when the voltage in the capacitor decays to a point which indicates an impending power outage, a timer is started. If the voltage is not restored before the end of the timing cycle of the timer, then the data is written to the non-volatile storage. If the voltage is restored before the end of the timing cycle, then writing of the data to the non-volatile storage is prevented.
REFERENCES:
patent: 3810116 (1974-05-01), Prohofsky
patent: 3959778 (1976-05-01), Brette
patent: 4199717 (1980-04-01), Germer et al.
patent: 4323987 (1982-04-01), Holtz et al.
Brunson Robert E.
General Electric Company
Karlsen Ernest F.
Morrison Thomas R.
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