Extension Cord Using LED as Indicator Lamp
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United States of America Patent
Stats
-
N/A
Issued Date -
Nov 27, 2008
app pub date -
May 24, 2007
filing date -
May 24, 2007
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
An extension cord includes a cable, a plug on an end of the cable, and a socket casing on the other end of the cable. A lighting device is mounted in the plug or the socket casing. The lighting device includes an LED electrically connected in parallel to conductive wires in the cable and a DC converting circuit electrically connected to the LED. The DC converting circuit converts an AC voltage from the plug into a DC voltage supplied to the LED for lighting the LED. Light beams emitted by the LED transmit through the plug or the socket casing to show the extension cord and to indicate on/off state of the extension cord. Another lighting device may be mounted in the other of the plug and the socket casing. An optical fiber may be mounted in the cable and lit to show the cable.
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