Power supply apparatus with circuit load sensor

Details Power supply apparatus with circuit load sensor Power supply apparatus with circuit load sensor

1997-09-22

1999-10-05

Gaffin, Jeffrey

Electrical transmission or interconnection systems

Switching systems

Condition responsive

307125, 307 98, 307 99, 361 88, 361 93, H01H 3500

Patent

active

059629320

ABSTRACT:
A power supply apparatus 10 with circuit load sensor provides an extension cord 20 having first and second ends extending from an enclosure 30. Within the enclosure, a power supply indicator circuit 40 lights an LED in response to the plug of the extension cord being inserted into a live outlet. Also within the enclosure, a power consumption indicator circuit 60 lights an LED in response to consumption of power by a load plugged into the socket of the extension cord. A nominal voltage drop across a TRIAC 70, carried in-line with the neutral conductor within the enclosure, triggers the power consumption indicator circuit when the load draws current.

REFERENCES:
patent: 3683198 (1972-08-01), Thode
patent: 4466040 (1984-08-01), Barthel et al.
patent: 4853821 (1989-08-01), Lewis
patent: 5579192 (1996-11-01), Lee
patent: 5629571 (1997-05-01), Roudeski

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