Switching device and electric apparatus

Details Switching device and electric apparatus Switching device and electric apparatus

2005-05-10

2009-02-17

Sherry, Michael J (Department: 2836)

Electricity: electrical systems and devices

Safety and protection of systems and devices

Ground fault protection

C361S160000

Reexamination Certificate

active

07492557

ABSTRACT:
A switching device is provided that includes a switching mechanism unit and a switch drive control circuit. In the switching device, an operating member is maintained in an ON position by the sucking force of a permanent magnet and a yoke, despite the pushing force of a biasing unit, when the permanent magnet is in an ON position. The yoke is magnetized in such a manner as to reduce the magnetic force of the permanent magnet, when a coil wound around the yoke is energized by the switch drive control unit. The operating member and a switching member are moved from the ON position to the OFF position by virtue of the pushing force of the biasing unit, thereby shutting a feed line.

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