Electricity: electrical systems and devices – Safety and protection of systems and devices – With specific current responsive fault sensor
Reexamination Certificate
2003-12-16
2008-03-11
Sherry, Michael (Department: 2836)
Electricity: electrical systems and devices
Safety and protection of systems and devices
With specific current responsive fault sensor
C361S093700, C361S078000, C361S079000
Reexamination Certificate
active
07342761
ABSTRACT:
The application of electric power from a power source to a load is controlled by detecting the magnitude of electric current flowing to the load and producing a first signal level that is indicative of that magnitude. The first signal level is compared to a reference signal level which comparison produces an output signal. Either the first signal level or the reference signal level is altered in response to variation of voltage applied to the load. This results in the output signal indicating when electric power consumed by the load exceeds a threshold level. The flow of electric current from the power source to the load then is controlled in response to the output signal.
REFERENCES:
patent: 5801522 (1998-09-01), McKenzie
patent: 6515840 (2003-02-01), Covi et al.
patent: 6621259 (2003-09-01), Jones et al.
patent: 6646847 (2003-11-01), Poe et al.
Baxter Keith M.
Kuszewski Alexander R.
Patel Dharti H
Rockwell Automation Technologies Inc.
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