Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – With electromagnetic field
Patent
1978-11-06
1980-11-18
Tokar, Michael J.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
With electromagnetic field
340654, G01R 120
Patent
active
042348471
ABSTRACT:
An automatically resettable fault indicator includes a rotatably-mounted target viewable from the exterior of the indicator for indicating circuit status. The target is positioned in a reset-indicating state by a reset circuit which periodically energizes a first winding to position a permanent magnet mounted for rotation with the target. Upon occurrence of a fault circuitry within the indicator energizes a second winding to reposition the target to a fault-indicating position. A delay circuit in the fault-responsive circuitry prevents simultaneous energization of the first and second windings, and an auxiliary pole piece associated with the main pole piece assists in repositioning the target to the fault-indicating position, for improved performance and reliability in responding to fault currents.
REFERENCES:
patent: 3460038 (1969-08-01), Ziegler
patent: 3761731 (1973-09-01), Burgett
LandOfFree
Fault indicator does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Fault indicator, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fault indicator will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-600210