Electric fence device
AssigneeFred Nordberg
InventorKjell Nilsson
Life of this patent
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Abstract
An electric fence has a series of posts connected by an elastically-stretchable, electrically-conductive string to form an enclosure for animals. The string has a unique structure which is comprised of electrically conductive and electrically nonconductive threads intertwined around a rubber core material. The threads are braided in such a way that the string may be substantially stretched without the braided threads severing. The elastically-stretchable construction prevents the string from breaking when moving animals collide with the electrified string.
Claims6
An electric fence device including a generator for transmitting high voltage electric pulses through an electrically conductive enclosure, comprising:
- an elastically-stretchable string having an elastic member;
- at least one electrically-conductive member combined with said elastic member to form an elastically-stretchable string having an outer surface which is at least partly electrically conductive;
- a plurality of posts, said elastically-stretchable string being attached to said posts and defining said enclosure;
- and,
- a restricting thread means having a first orientation relative to said elastic member when said elastically stretchable string is attached to said posts and having a second orientation relative to said elastic member as said elastic member is stretched, said second orientation approaching a substantially longitudinal alignment as said elastic member is progressively more stretched,
- whereby, upon impact with a moving animal, said elastically-stretchable string deflects sufficiently to prevent it from breaking while avoiding excessive stretching.
Dependencies are inferred from the claim text.