Patent ID: 8485502

Claim:
An electrified fence comprising: a plurality of vertically oriented fence posts; a barrier element supported by at least one said fence post; a gate mounted between two fence posts, said gate having a left side and a right side; at least one exposed filamentary conductor mounted to and extending along said barrier element and said gate; and a switching arrangement disposed to fully de-energize that portion of said exposed filamentary conductor extending along said gate responsively to said gate being moved to an open position, wherein said switching arrangement is disposed to break electrical continuity of said exposed filamentary conductor at two spaced apart points to electrically isolate said gate when said gate is in an open position, wherein said switching arrangement comprises first, second, third and fourth collars respectively mounted to a first fence post, left side of said gate, right side of said gate, and a second fence post, wherein a conductor tower is disposed on the outside surface of each of said collars to secure a filamentary conductor, wherein each of said collars define a length, an outside surface and an inside surface, wherein each of said collars is generally arcuate along its length which in combination with a fastening means enables each of said collars to be mounted around a post having a circular cross-section, wherein an electrically conductive contact is disposed on the outside surface of each of said collars, wherein each of said electrically conductive contacts is supported by a contact support tower disposed on said outside surface, wherein each of said electrically conductive contacts comprises a shaft, said shaft terminating in a head, said contact support tower having a central bore for receiving and guiding said shaft, wherein said electrically conductive contact is biased by a spring in an outward direction with respect to said outside surface, said spring being located in said central bore, wherein when said gate is in a closed position said electrically conductive contacts of said first and second collars are in direct contact, and said electrically conductive contacts of said third and fourth collars are in direct contact, and wherein when said gate is in an open position said electrically conductive contacts of said first and second collars are not in contact, and said electrically conductive contacts of said third and fourth collars are not in contact.