NZ231466A - Prefabricated electric fence: wire droppers insulated from fence wires - Google Patents

Description

23 14 6 6 Priority Date(s>! Complete Sptfcifidation, Filed: ZX\ &?.%. W. P.

API IvS/CSV.

Publicatfott Date: ?..WAY. J99f.... P.O. Journal. No: ....

Patents Form No. 5 Patents Act 1953 COMPLETE SPECIFICATION FABRICATED ELECTRIC FENCING A CowipAnu ivvtorpeittuheot Utoiw "tt** iftu><5 ^ S5?«*Ttt , WE, BORAL LIMITED, of 6-10 O'Connell Street, Sydney, New South Wales • A Mj iwto\rpo TED. of 6-1 A 2000, Australia hereby declare the invention for which we pray that a patent may be granted to us, and the method by which it is to be performed, to be particularly described in and by the following statement: FJF/3930D 231466 This Invention relates to a new and Improved electric fencing system or structure, 1n particular to a prefabricated electric fence which 1s easy to erect and has versatility 1n appropriate height and mesh spaclngs to meet various control requirements. ©5 Over recent years, the use of electrified fencing has become more prevalent 1n the fencing for stock and other uses. The most usual method of constructing such electrical fencing Is that some of the horizontal strands of wire are electrified with a high voltage, low current, pulsed electric power supply. In constructing such a fence, the posts either have 10 Insulators to hold the current carrying wires or must be Insulated themselves. A problem exists with the vertical droppers which are to provide strength and shape to the fence. The droppers must be insulated from the current carrying wires.

To construct such electric fencing, involves a number of different 15 parts which must be erected on site. The erection 1s highly labour Intensive and therefore the cost of bulUdlng such fencing Insures that the economics of such fencing puts It into the range where It 1s used when the enclosed stock or crops are highly valuable.

U.S. Patent 2,530,247 to Koonz generally discloses a wire electric 20 fence fabric having selected horizontal strands electrically Insulated. The type of fencing described above lacks strength in that the pickets are not one piece similar to a woven pattern such as Cyclone Rlnglock prefabricated fences. Such a woven pattern enables less droppers and posts to be used thereby also reducing the cost of the fence. 25 An Important object of this invention 1s to provide a regularly manufactured prefabricated electric fencing system or structure of consistent quality in which 1n the preferred embodiment the horizontal wires are electrically insulated from the one piece vertical wires or pickets which provide strength and stability to the fence.

Another important object of this Invention 1s to provide a range of prefabricated fences which will, by virtue of the varying height and mesh relationship be particularly suited to various specific control requirements. r ',.7.. PATOf r ICE nas/204y •19 APR 1391 •<- aw- • 231466 Another Important object of this Invention Is that It can be used with a variety of posts and post Insulators, and, a variety of end strainers and end Insulators.

According to one aspect of the present there is disclosed a CS 5 prefabricated fencing arrangement comprising a plurality of long, substantially parallel wires Intended to be mounted horizontally and arranged to form an upper wire, a lower wire and at least one intermediate wire, and a plurality of short substantially rigid and substantially parallel metal pickets each extending substantially perpendicular to said 10 long wires, the Intermediate wire(s) and pickets being electrically Insulated from each other by a first insulator located at each intersection of the Intermediate wire(s) and the picket and enveloping both Intersecting wires, each said insulator being.fixed to the picket wire but slldable relative to the Intermediate wire.

Other objects and advantages of this Invention will become apparent with disclosures In the accompanying specifications and drawings 1n which: Fig. 1 Is a perspective view of fencing of a preferred embodiment, Fig. 2 1s a detailed front view of the fencing of Fig. 1, Fig. 3 Is a perspective view of an insulator used in the fencing of 20 Fig: 1, Fig. 4 1s a lateral cross-sectional view of part of the fencing of Fig. l, F1g. 5 1s an exploded perspective view of another embodiment of an Insulator able to be used with the fencing of F1g. 1, Fig. 6 1s a perspective view of another embodiment of fencing, and F1g. 7 is a detailed front view of the fencing of Fig. 6.

The fencing as illustrated In Figure 1 comprlses'a plurality of substantially horizontal wires 4 which can be either active, negative, or neutral depending on the particular requirments of the fencing 1. In the 30 particular fencing 1 Illustrated in Fig. 1 every second horizontal wire Is active or live whilst the alternative horizontal wires are either neutral or earth return. Also seen 1n the fencing is a pluarllty of posts 2 which secure the fencing 1 Into position and also a plurality of vertical dropper -3- i HRF/0454y ... ^^cnrFW*' **-*r"»•Ki^>Vr—.< 231466 wires, or pickets 3. These dropper wires 3 are continuous and add strength to the fencing structure 1. The dropper wires are not electrified in the fencing structure 1 as Illustrated In Fig. 1.

The Insulator 5 Is at the junction of wires 3 and 4 electrically Insulating one from the other and fixedly clamps the picket 3 Into position 231466 C whereby the picket 3 Is Immovable in relation to the Insulator 5. The Insulator 5 also firmly clamps wire by means of pressure, however, the linear alignment of the wire 4 can be adjusted in order that the pickets are substantially vertical when the fence is erected on sloping ground.

Figure 2 shows an enlarged perspective view of the fence structure 1 5 llustrated in F1g. 1.

Figure 3 shows a perspective drawing of one embodiment of the insulator 5 which is moulded 1n position at the junction of wire 4 and the picket 3.

Figure 4 shows a vertical sectional view through the fencing 10 structure showing the continuous picket 3, the horizontal wires 4, the insulators 5 which occur at the junctions of the wire 4 and the picket 3, and the Insulator 15 which occurs at the junction of the ends of the picket 3 and the top and bottom horizontal wires 4. Also shown is the one embodiment of the enclampment 14 of the end of the picket 3 in the end 15 insulator 15, which is a deformation of the ends of the picket 3.

Figure 5 shows a perspective drawing of another embodiment of the insulator 5 which comprises three sections and 1s shaped like a disc with two end sections 6 and centre section 7 being held together by fasteners 8 which pass through sections 6 and 7. The middle section 7 has four bosses 20 9 on each side of the disc which mate with four recesses 10 In the end sections 6 thereby locating the end sections 6 relative to the centre section 7. The centre section 7 also has a centrally located protrusion 11 on each side which mates with a corresponding recess 12 In the end sections 6. When sections 6 and 7 are clamped together with the fasteners 8 the 25 wire 4 and the picket 3 are idented by the action of the protrusion 11 against the recess 12. Due to the Indentation the wire 4 and the picket 3 are substantially Immovable.

The end section 6 has a groove 13 cut into the face which receives the wire 4 and the picket 3.

The fencing as Illustrated in Figure 6 is another embodiment of the fencing shown 1n Figure 1 and comprises a plurality of substantially horizontal wires 4 which can be either active, negative, or neutral depending on the particular requirements of the fencing 16. In the particular fencing 16 Illustrated in Fig. 6, the picket 3 is electrically 35 connected to the top and bottom of the horizontal wires 4 so that the pickets 3 can be either active or live, or neutral or earth return as required in the fencing structure 16. nas/204y w/z. patent ofnca : <3 ;\PR139l)P ~ ' ~ "" - -' ft*'"' ' . ' n; 23 1 4 6 § Figure 7 shows an enlarged perpsectlve view of the fencing structure 16 shown in Figure 6. In particular this figure shows one embodiment of the end connection of the pickets 3 to the top and bottom horizontal wires 4 which achieves both an electrical and firm connection of the pickets 3 to 5 the wires 4.

The prefabricated electric fencing enables the fencing to be installed 1n a time efficient manner, and the woven nature of the fencing provides a physical barrier as well as an electrical barrier. The adjustment of the wires within the Insulators allows the fencing to be 10 easily adjusted for the slope of land on which the fencing 1s being installed. © 25 © 30 nas/204y —-wtf , ___ _ o 231466 f"N Q

Claims (8)

WHAT WE CLAIM IS:

1. A pre-fabricated fencing arrangement comprising a plurality of long, substantially parallel wires Intended to be mounted horizontally and arranged to form an upper wire, a lower wire and at least one Intermediate wire, and a plurality of short substantially rigid and substantially parallel metal pickets each extending substantially perpendicular to said long wires, the Intermediate wlre(s) and pickets being electrically Insulated from each other by a first insulator located at each Intersection of the Intermediate w1re(s) and the picket and enveloping both Intersecting 10 wires, each said Insulator being fixed to the picket wire but slldable relative to the Intermediate wire.

2. The fencing arrangement as claimed 1n claim 1 wherein the pickets are electrically connected to the upper and lower wires at their Intersections therewith. 15

3. The fencing arrangement as claimed 1n claim 2 wherein each extremity of the pickets Is wrapped around the corresponding upper or lower wire.

4. The fencing arrangement as claimed 1n claim 1 wherein the pickets are Insulated from the upper and lower wires by a second Insulator located at each Intersection between either a lower wire or an upper wire with a 20 picket and enveloping both intersecting wires.

5. The fencing arrangement as claimed 1n claim 4 wherein said second Insulator is substantially T-shaped.

6. The fencing arrangement as claimed 1n any one of claims 1 to 5 wherein said first Insulators are substantially X-shaped. 25

7. The fencing arrangement as claimed 1n any one of claims 1 to 5 wherein said first insulators comprise three layers clamped together with the Inner layer separating said Intersecting wires.

8. Fencing substantially as hereinbefore described with reference.to the accompanying drawings. dated THIS I2- DAY OF 19"^« 30 A.J. PARK & SON PER AGENTS- FOR THE APPLICANTS 35 HRF/0454y -6- ' I.j J.. PA : j ! h •!? /iRisaijH'