Apparatus for detecting operation of an electric fence and fence charger

摘要

Detection apparatus for sensing the operational state of an electric fence and thus an electric fence charger intended to maintain an electric charge on the fence, the invention and the several embodiments thereof find compatibility with known fence chargers whether pulse or continuous in appropriate supply voltage ranges. The detection apparatus of the invention includes a power supply such as a battery to drive a light source such as a light emitting diode which is caused to flash by circuitry carried by the apparatus, the apparatus being clipped to the fence at any location thereof to connect the circuitry to the electrical load on the fence. The light source operates in the event of a failure of the fence charger to perform properly including conditions ranging from complete failure to voltage drops of a predetermined degree or in the event of an open circuit such as can be caused by a separated fence conductor such as a fence wire. The circuitry of the invention includes in the several embodiments thereof control functions based on the operation of an integrated circuit or a transistor in combination with other circuit elements.