Classifications

• • A—HUMAN NECESSITIES
  • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
  • A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
  • A01K3/00—Pasturing equipment, e.g. tethering devices; Grids for preventing cattle from straying; Electrified wire fencing
  • A01K3/005—Electrified fencing for pastures
• • H—ELECTRICITY
  • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
  • H05C—ELECTRIC CIRCUITS OR APPARATUS SPECIALLY DESIGNED FOR USE IN EQUIPMENT FOR KILLING, STUNNING, OR GUIDING LIVING BEINGS
  • H05C1/00—Circuits or apparatus for generating electric shock effects
  • H05C1/04—Circuits or apparatus for generating electric shock effects providing pulse voltages

Definitions

• Electric fences for enclosed pasture-land are previously known and appreciated for being simple and effective. They consist of a grounded mains- or battery-operated pulse generator for high voltage and low power and, connected thereto, a smooth metallic wire which is carried by insulating poles so as to surround the enclosed pasture-land. At first contact with the wire the domestic animals learn that it gives an unpleasant electric chock and thereafter avoid subsequent contact. To date simple stainless metallic wire has been used as wire material, in more sophisticated applications woven into a thin ribbon, which makes it more visible. The previously known type of electric fences have however, a considerable disadvantage.
• one or more electrically conductive wires are associated with an elastic material in such a way that the wires and the material together form a considerably but restricted and elastically stretchable string, which is elec ⁇ trically conductive at least on parts of its surface, and which together with the poles comprise the enclosure.
• Fig. 1 shows a section of the string
• Fig. 2 shows the string in a side view
• Fig. 3 shows a portion of the enclosure
• Fig. 4 shows a portion of the enclosure in a horizontal sec ⁇ tion.
• an elastic and electrically conductive string is formed around a synthetic rubber core 1 which prefer ⁇ ably is divided into several treads, an envelope of tubular braided plastic threads 2 and a number of metal threads 3 included in the braid.
• the plastic material is preferably a high quality polyamide, e.g. one being known under the commer ⁇ cial denomination 6006, and is treated against UV-radiation degradation.
• the metallic thread is comprised of stainless steel with a diameter of 0.15 - 0.3 mm.
• the tubular braid allows the string to be stretched out to the length where the plastic threads 2 lie against each other in an almost longitu ⁇ dinal direction and it is dimensioned such with respect to the core 1 that the latter thereby is stretched to about two times its length in the state of rest.
• the outer diameter of the string is about 4 mm in its state of rest.
• a string which is formed in such a way is electrically conductive by the metallic threads being braided into its surface and is elastically stretchable because of the association between the rubber core and the braided envelope, but the stretchability is restricted by the lengths of the plastic threads.
• the string In order to secure the association between the core and the envelope, the string should be provided with a knot near all free ends. The proper ⁇ ties of the string makes it ideal for replacing previously used metallic wires and ribbons in electric fences. It is thereby preferably hung on a post according to Fig.
• the attachment means 7 has the same shape as a boat anchor and is positioned obliquely with respect to the profile 5 in order to allow it to be hooked together with a similar attachment means of a neighbouring post of the same type as is illustrated on Fig. 4. The purpose of this is to provide the easiest way of arranging an easily opened place in the fence.
• the strings which are tied around the respective attachment means contact each other by this hooking together and thereby provide electrically conductive connection.
• the post carrying the upper attachment means is slightly pressed down into the ground, it is simple to simul ⁇ taneously pull it out from the ground and from the mutual connection between the attachment means so as to open the fence. Since both the profile 5 and the attachment means 7 are made from electrically insulating materials, the post may be gripped and lifted simply by the hands.
• the string When mounting the fence the string is stretched to about 3/4 of its possible length and is successively attached to the pre- viously mounted posts, which are placed 15 - 20 m apart, by winding it one turn around the attachment means 7.
• the fence By the fence being mounted this way the risk of it being run down by rushing animals is eliminated because its stretchability gives the animals time to slow down under the influence of the electric chocks from the string. The animal is not injured and the string will stretch it self straight again when the animal changes direction.
• the considerably better visibility of the string compared to a simple metal wire also reduces the risk of the animals running on to it. This may be enhanced by using plastic threads in several different colours in the envelope of the string.
• the scoop of this invention also encloses several other embodiments.
• a rubber string which by mixing or impreg ⁇ nation with electrically conductive material is provided with a sufficient conductivity for the high voltage electrical pulses also on the surface.
• very thin threads of metal are mixed with equally thin threads of synthetic fibres and spun according to the method known from the knitwear industry such as to result in a so called tricot string.
• Such a string has a considerable elastic stretchability and may be twisted together to the thickness and strength necessary for electric fences.
• such a string may be used for spinning around a rubber core.
• a smooth steel wire which is wound into a helical spring and surrounds a rubber core may form the desired string.

Landscapes

• Life Sciences & Earth Sciences (AREA)
• Environmental Sciences (AREA)
• Animal Husbandry (AREA)
• Biodiversity & Conservation Biology (AREA)
• Insects & Arthropods (AREA)
• Catching Or Destruction (AREA)
• Housing For Livestock And Birds (AREA)
• Refuge Islands, Traffic Blockers, Or Guard Fence (AREA)

Priority Applications (9)

Applications Claiming Priority (4)

Publications (1)

Family

ID=25940287

Family Applications (1)

Country Status (5)

Cited By (4)

Citations (1)

• 1995
  • 1995-09-08 WO PCT/SE1995/001012 patent/WO1996008140A1/en active IP Right Grant
  • 1995-09-08 EP EP95932272A patent/EP0783243B1/en not_active Expired - Lifetime
  • 1995-09-08 AU AU35364/95A patent/AU3536495A/en not_active Abandoned
  • 1995-09-08 DK DK95932272T patent/DK0783243T3/da active
• 1997
  • 1997-03-12 FI FI971042A patent/FI107871B/sv not_active IP Right Cessation

Patent Citations (1)

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