Electric lamp and discharge devices: systems – With signal – indicator – or alarm – Plural load device systems
Reexamination Certificate
2008-03-07
2010-12-21
Owens, Douglas W (Department: 2821)
Electric lamp and discharge devices: systems
With signal, indicator, or alarm
Plural load device systems
C315S120000, C315S294000
Reexamination Certificate
active
07855514
ABSTRACT:
An LED indicator device is mounted in an AC power plug or socket and electrically connected in parallel with an AC power source. The LED indicator device includes a driving/current-limiting circuit to which an LED lighting circuit is coupled. The driving/current-limiting circuit includes a driving/current-limiting capacitor and a discharge resistor connected in parallel with the driving/current-limiting capacitor. The LED lighting circuit includes an LED, a protective instantaneous current-limiting resistor coupled to the LED, a rectifying diode connected in parallel with the LED, and a protective instantaneous voltage-limiting capacitor connected in parallel with the LED. The LED is lit to show the position and on/off state of the AC power plug or socket. Three LEDs emitting different colors and associated driving/current-limiting circuits and associated LED lighting circuits can be utilized to indicate incorrect power connection or short circuit of the AC power plug or socket.
REFERENCES:
patent: 5300864 (1994-04-01), Allen, Jr.
patent: 5861720 (1999-01-01), Johnson
patent: 7015654 (2006-03-01), Kuhlmann et al.
patent: 7136266 (2006-11-01), Gershen et al.
patent: 7221106 (2007-05-01), Nemir et al.
patent: 2008/0094764 (2008-04-01), Zhang et al.
patent: 2008/0290817 (2008-11-01), Ku et al.
Ku Ying-Ming
Lu Qiang
Wu Chun-Mei
Zhang Yvjie
Kamrach Alan
Kamrath & Associates PA
Le Tung X
Owens Douglas W
YFC-Boneagle Electric Co., Ltd.
LandOfFree
LED indicator device for AC power plug or socket does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with LED indicator device for AC power plug or socket, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and LED indicator device for AC power plug or socket will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4225826