FR2712452A1 - Tensioner for metal wires forming electric barrier to small animals - Google Patents

Abstract

The tensioner is formed of a standard module with an insulating base (1) carrying end bridges (2) and intermediate (5) bridges. The bridges are made of an insulating material, and have holes to allow passage of the wires. The wires terminate in the central part of the tensioner module, between the two intermediate bridges. The ends of the wires are joined by a spring (6). The spring maintains tension between neighbouring lengths of wire and also provides electrical continuity between the wires. The ends of the wires are formed into a hook that engages with a hook at the end of the spring.

Description

Tensioning device
of parallel conductive metal wires
The present invention relates to a device for tensioning parallel metallic wires conducting electric current, said wires being intended to keep different small animals (rodents, insects, birds, etc.) away from the places to be protected from their nuisance.

 This device is an improvement on the device described in patent NO 91 13745, of the present applicant.

This previous device intended to combat poultry nuisance consisted of conductive wires supplied by a generator and had the following drawbacks: in the event of excessive pressure, the wires did not maintain a constant tension, which entailed a risk of short circuits ; industrialization was not rational enough; the installation of said device was too long and too delicate and difficult to adapt to all surfaces; Finally, he noted that it was not possible to walk on the wires.

 The present invention aims to solve these problems, it consists of a standard module connectable in series or in parallel.

 The accompanying drawings illustrate the invention: - Figure 1 shows the standard module and its connection in series, - Figure 2 shows the connection of two modules in parallel, - Figure 3 shows the adaptation of the device on a weak support section, - Figure 4 shows the adaptation of the sheet device on a frame to protect flat surfaces of various shapes, - Figures 5 and 6 show the adaptation of the device on concave and convex shapes.

 Referring to Figure 1, the standard module looks like this: an insulating soleplate (1), fixed to the surface to be protected by screwing, riveting or gluing, at its two ends, insulating perpendicular bridges (2) in which openings (3) for passing portions of metallic conductive wires (4); the length of the sole being approximately 2 m, intermediate bridges (5) support the portions of wire (4), additional bridges can be added if necessary.

 Each conductive wire for each sole consists of three elements: two portions of conductive metal wire (4) comprising a hook at each end, a tension spring (6) comprising a loop at each end.

 Springs (7) terminated by a loop at each end, hanging between the modules at the end of the portions of conductive wires connect said modules in series.

 With reference to FIG. 2, clamping systems (domino type) (8) can be threaded onto the portions of wires at the internal ends of the module or at any other location; They allow connection to the generator, connection to other modules, possible connection to other elements of the circuit.

The standard module will be easily shortened to adapt to all the lengths of the surfaces to be protected. It will suffice to cut the sole, to glue a trigger guard at the end and to adjust the portions of conductive wire.
The modules are installed as follows: fixing of the insulating soleplate (1) by screwing, riveting or gluing, etc., the portions of wires (4) being relaxed; tension of the portions of wires by hooking the springs (6); connection of the modules to each other with a metal spring (7); possible connection of the various parts of the circuit (tablecloth, support of small section etc ...); connection to generator and power up.

 The threads being stretched, it is possible to walk on it with care, taking care not to put your feet on the trigger guard. Cleaning can be done without difficulty with a brush or vacuum cleaner.

 The simplicity of the device allows very flexible use and its adaptation to all kinds of special cases.

 With reference to FIG. 3, the adaptation of the device consists in placing, at regular intervals, on a support of small section (cable, tube, tree branch, etc.) insulating bridges (5) comprising a collar ( ll) to enclose the support, two openings (3) in said bridges allowing the passage of conductive wires (4) parallel to the support.

 The wire portions (4) are of any length, the first and the last trigger guard serving as an anchoring point.

 The clamping systems (7) allow connection in series or in parallel to another part of the circuit or to the generator.

 With reference to FIG. 4, on flat surfaces of various shapes and sizes, for example lampposts, lamps, speakers, display panels, street furniture, etc., the device is adapted in the form of ply: portions of conductive wires (4) are stretched by springs (6) between two insulating angles (2), provided with holes (3) and fixed to two opposite edges of a rigid frame (1) adjusted to the dimensions d '' a surface to be covered; said portions of conductive wires (4) being connected in pairs by the connection bars (10) and by the clamping systems (8).

 Referring to Figures 5 and 6, the device adapts to various non-planar shapes, for example statues, niches, capitals etc ...; to protect concave or convex shapes, it suffices to add additional bridges (5) to the standard module to maintain constant spacing of the conductive wire (4) relative to the surface; it is also possible to directly attach the bridges (5) to the surfaces to be protected.

The wire portions (4) are of any length, the first and the last trigger guard serving as an anchoring point
Of course, the invention is not limited to the embodiments described and shown in the accompanying drawings. Modifications remain possible, in particular from the point of view of the constitution of the various elements or by substitution of technical equivalents, without however departing from the field of protection of the invention.

Claims (10)

 1. Device for tensioning metallic wires conducting electrical current, characterized in that it consists of a standard module comprising an insulating sole (1), end bridges (2) and intermediate bridges (5), said insulating bridges being provided with two openings (3) for the passage of the portions of conductive metal wires (4) terminated at their ex ends by hooks hooking to the loops of the springs (6).  2. Device according to claim 1, characterized in that the springs (7), hooking between the modules at the end of the portions of metal wires connect the modules in series.  3. Device according to claim 1, characterized in that clamping systems (domino type) (8) are threaded on the portions of conductive son (4) allowing electrical connections.  4. Device according to claims 1 and 2, characterized in that small metal rods (9) added to the clamping systems (8) connect the modules in series.  5. Device according to claims 1 and 3, characterized in that connection bars (10), fixed on the clamping systems (8), connect the wires of the modules in parallel.  6. Device according to claim I, characterized in that insulating bridges (5), provided with two holes (3) and a clamp (11) are fixed directly on a support of small section.  7. Device according to any one of claims 1,3,4 and 5, characterized in that portions of conductive wires (4) are stretched by springs (6) between two insulating angles (2) provided with holes ( 3) and fixed to two opposite edges of a rigid frame adjusted to the dimensions of a surface to be protected, said portions of conductive wires (4) being connected in pairs by the connection bars (10) and by the clamping systems (8).  8. Device according to claim 1, characterized in that additional bridges (5) in sufficient number are arranged on the standard module to maintain a constant spacing of the conductive son relative to a concave or convex surface.  9. Device according to any one of claims 1,3,4 and 5, characterized in that the insulating bridges (5) provided with openings (3) are fixed directly on the surface to be protected.  10. Device according to any one of claims 6 and 9, characterized in that the portions of conductive wires (4) are of any length, the first and the last bridge serving as their anchoring point.