Electricity: electrical systems and devices – Safety and protection of systems and devices – With specific transmission line
Reexamination Certificate
2007-11-13
2007-11-13
Zarroli, Michael C. (Department: 2839)
Electricity: electrical systems and devices
Safety and protection of systems and devices
With specific transmission line
C361S115000
Reexamination Certificate
active
11524287
ABSTRACT:
The present invention provides a set of circuits which is capable of performing an automatic check on main components of a circuit interrupting device when the circuit interrupting device is properly powered and the device is at a tripped state to determine whether these main components function normally. The results of the automatic check can be detected by depressing a reset button in the circuit interrupting device. If the reset button can be depressed, the main components function normally. Alternatively, the results can be automatically displayed by a showing on the face lid of the circuit interrupting device of either a green light, which means that the main components function normally, or a red or yellow light or no light, which means that at least one of the main components in the circuit interrupting device does not function properly. The present invention also provides an end-of-service-life detection integrated circuit chip capable of receiving and transmitting an automatic check signal and determining whether or not the circuit interrupting device can be reset. The preferred circuit interrupting device is a ground fault circuit interrupter (GFCI).
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Huang Huadao
Huayang Lu
Andrews & Kurth LLP
Chao Fei-Fei
Huang Huadao
Zarroli Michael C.
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