Current draw and power consumption display circuit

Details Current draw and power consumption display circuit Current draw and power consumption display circuit

1986-09-23

1989-02-21

Karlsen, Ernest F.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Using radiant energy

324120, 324122, G01R 1926

Patent

active

048068543

ABSTRACT:
A circuit layout for continuous display of power consumption of an electric device includes a light emitting diode actuated by voltage pulses, the frequency whereof corresponds to the current draw of the electric device. It is possible to determine directly whether the instantaneous power consumption of the electric device, in particular a household device, is low or high in case of varying loads as the frequency of the voltage pulses and thus the flashing frequency are below the flicker limit resolvable by the human eye. The power consumption display can be manufactured in a highly cost effective manner and in a compact configuration, so that it may be placed in an electric outlet housing.

REFERENCES:
patent: 503589 (1893-08-01), Evershed
patent: 2255637 (1941-09-01), Wright
patent: 3488586 (1970-01-01), Watrous et al.
patent: 3524133 (1970-08-01), Arndt
patent: 3611339 (1971-10-01), Richey
patent: 4151464 (1979-04-01), Cooper
patent: 4401943 (1983-08-01), Morris
patent: 4502004 (1985-02-01), Schindler
patent: 4594546 (1986-06-01), Greene et al.
Weiss et al; "Novel Test Meter"; Radio & Television News; vol. 47; No. 4; Apr. 1952; p. 42.

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