Fault indicator and means for resetting same
First Claim
1. Means for resetting the pivoted target of a fault indicator of the type having a generally cylindrical housing, a target mounted for rotation in a plane generally perpendicular to the axis of said housing at one end thereof and including a target permanent magnet mounted for rotation with said target, a stationary permanent magnet within said housing for biasing said target magnet to position said target in a fault indicating position, and means including a pair of demagnetizable pole pieces extending longitudinally in parallel-shaped relationship within said housing for biasing said target magnet to position said target in a reset position, comprising in combination:
- a receptacle dimensioned for telescopic engagement with said housing;
a winding coaxially disposed within said receptacle for magnetic communication with said pole pieces when said housing is seated in said receptacle; and
means for energizing said winding from a source of direct current.
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Accused Products
Abstract
A fault indicator for alternating current distribution systems includes a pair of spaced pole pieces for receiving therebetween at one end the conductor and at the other end a pivoted permanent magnet carrying a target that is biased to a fault indicating position by a stationary permanent magnet. The pole pieces are demagnetized on flow of fault current in the conductor. They are remagnetized by a winding which is energized by discharge of a capacitor that is charged through a rectifier from an oscillator circuit. The winding is carried by a receptacle into which the other ends of the pole pieces are inserted and a circuit is completed thereby to charge the capacitor. The receptacle is carried at one end of a tubular housing the other end of which has an eye to receive a claw of a live line tool for applying the fault indicator to and removing it from the conductor.
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Citations
5 Claims
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1. Means for resetting the pivoted target of a fault indicator of the type having a generally cylindrical housing, a target mounted for rotation in a plane generally perpendicular to the axis of said housing at one end thereof and including a target permanent magnet mounted for rotation with said target, a stationary permanent magnet within said housing for biasing said target magnet to position said target in a fault indicating position, and means including a pair of demagnetizable pole pieces extending longitudinally in parallel-shaped relationship within said housing for biasing said target magnet to position said target in a reset position, comprising in combination:
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a receptacle dimensioned for telescopic engagement with said housing; a winding coaxially disposed within said receptacle for magnetic communication with said pole pieces when said housing is seated in said receptacle; and means for energizing said winding from a source of direct current. - View Dependent Claims (2, 3, 4, 5)
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Specification