Switching circuit, switching method, protective device and...

Details Switching circuit, switching method, protective device and... Switching circuit, switching method, protective device and...

2003-12-12

2008-10-14

Sherry, Michael J (Department: 2836)

Electricity: electrical systems and devices

Control circuits for electromagnetic devices

For relays or solenoids

C361S091100, C324S418000, C324S419000, C324S424000

Reexamination Certificate

active

07436644

ABSTRACT:
A solenoid type switch has at least two driving coils. The driving coils turn off a switch with a current for example an overcurrent that flows in the switch. The driving coils are magnetized or demagnetized by a driving circuit so as to turn on or off the switch. The driving circuit magnetizes or demagnetizes the driving coils in accordance with a control signal supplied from a controlling circuit. Thus, the switch can be turned off with the current that flows in the driving coils.

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International Search Report dated Apr. 13, 2004.
Japanese Patent Application 2002-369515; OA Issued on Jul. 4, 2006.

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