BIRD DETERRING DEVICE

Abstract: A device for deterring birds from roosting or nesting on building ledges and the like having one or more wires (12, 13, 14) linking the opposing faces of two wire attachment means (10, 11) that are fixedly mounted on said ledge or the like. The wire(s) are connected to one wire attachment means (10) by retracting means (15) which adjusts the length and tension on the wire(s) when attached to the opposing wire attachment means (11). When more than one wire is used, the wires may be separately or collectively sprung by means of a spring loaded drum.

Description: BIRD DETERRING DEVICE FIELD OF INVENTION; This invention relates to a device which will deter birds from roosting or nesting on building ledges and the like. Much damage may be caused by pest birds roosting or nesting on building ledges, such as a window sill, or water drainage canals. The type of damage may vary from the fouling of surfaces to major structural and functional 10 deterioration. DISCLOSURE OF INVENTION; It is an object of the present invention to provide a device which can be installed on a surface that will deter birds from roosting or nesting thereon, • j c According to this invention, there is provided a device for deterring birds from roosting or nesting on building ledges and the like, said device comprising two wire attachment means adapted to be fixedly mounted on said ledge or the like, one or more wires linking the opposing faces of 20 said wire attachment means and positioned so that when the device is in its assembled position the wires obstruct the roosting or nesting activities of the bird, one or more wire retracting means located on one wire attachment means which in operation adjust(s) the length and tension on said wires, z_5_ either separately or collectively as the case may be, when attached to the opposing wire attachment means. The degree to which each wire will retain its tension when the device is assembled is dependent primarily on the inherent properties and dimensions of the wire. It has been found that, where a long length of surface is to be protected, the wire preferably used in the device will retain effective tension when assembled, if there is a distance of about 4 metres between opposing wire attachment means, and the same wires are supported at the mid-point of their length by a supporting means. Accordingly, the supporting means should provide resting support to the wires, thereby reducing any sagging of the wires over their length. In a preferred form of the invention, wire attachment and supporting means are brackets made of a non-corrosive material and the wires are positioned between the brackets at the mean breast height of the target bird. Preferably, when one retracting means operates to adjust the length and tension on all the wires collectively, the retracting means incorporates a spring loaded drum that automatically winds the wires when the wires are detached from the opposing wire attachment means. More preferable still is the use of separate retracting means for each wire that are independently sprung to produce the desired wire length and tension. In this embodiment, each independently sprung wire is connected to a spring loaded drum that automatically winds the wire when it is detached from the opposing wire attachment means . One advantage of having independently sprung wires is to accommodate the different changes to length and tension that are experienced by each wire when the opposing wire attachment means in moved relative to the retracting means . Alternatively the retracting means, when used to adjust the length and tension of wires separately or collectively, may incorporate a drum that is hand wound. In this form, the maintenance of tension in the wires will primarily require "the drum axle to be movable and fixed in a spring loaded mounting. In order to adjust the relative position of the wire attachment means, the wire attachment at the opposing wire attachment means may be removable or permanently fixed if the wire attachment means itself is readily detachable. When brackets are used as the wire attachment and supporting means, the brackets may be fixed to a surface by adhesive, bolts, rivets, fixing screws or by other securing means appropriate for the purpose. BRIEF DESCRIPTION OF THE DRAWINGS; In order that the invention may be more readily understood and put into practical effect, reference will now be made to the following drawings, in which:- Fig 1 is a perspective view of the bird deterring device according to one embodiment of the invention where the wires are collectively sprung, and, Fig 2 is a perspective view of the bird deterring device according to another embodiment of the invention where the wires are independently sprung. DESCRIPTION OF PREFERRED EMBODIMENTS; The device of Fig.l comprises transparent opposing brackets 10 and 11, linking wire 12,13 and 14 which are fed from a retracting means 15 and pass through wire positioning holes 16, 17 and 18 for attachment at the opposing bracket at fastening points 19, 20 and 21. The device is secured to a surface through securing means 22. The device of Fig. 2 varies from that of Fig. 1 only in that the linking wires 23, 24 and 25 are independently sprung from separate retracting means 26, 27 and 28 respectively. When the device of either of Figs. 1 or 2 is secured to a ledge, the position and tension of the linking wires should be such that they effectively obstruct the roosting or nesting activities of the target bird. Various modifications may be made in details of design <-*-* nc *- construction without departing from the scope and ambit of the invention.

Claims: CLAIMS ; - 1. A device for deterring birds from roosting or nesting on building ledges and the like, said device comprising two wire attachment means adapted to be fixedly mounted on said ledge or the like, one or more wires linking the opposing faces of said wire attachment means and positioned so that when the device is in its assembled position the wires obstruct the roosting or nesting activities of the bird, one or more wire retracting means located on one wire attachment means which in operation adjust(s) the length and tension on said wires, either separately or collectively as the case may be, when attached to the opposing wire attachment means. 2. A device according to claim 1 including a supporting means that provides resting support to the wire(s) at their midpoint whenever the distance between opposing wire attachment means is about 4 metres. 3. A device according to claim 1 or claim 2 wherein the wire(s) are positioned between the brackets at the mean breast height of the target bird. 4. A device according to any one of claims 1 to 3 wherein the retracting means incorporates a spring loaded drum that automatically winds the wire(s) when they are detached from the opposing wire attachment means. 5. A device according to any one of claims 1 to 4 wherein, when there is more than one wire, the retracting means operates to adjust the length and tension of all the wires collectively. 6. A device according to any one of claims 1 to 4 wherein, when there is more than one wire, the retracting means operates to adjust the length and tension on all the wires separately. 7. A device according to any one of claims 1 to 6 wherein there are three wires each connected to individual retracting means that adjust the wire length and tension separately. 8. A device according to any one of claims 1 to 3 or any one of claims 5 to 7 whenever appendant to any of claims 1 to 3 wherein the retracting means incorporates a drum that is hand wound. 9. A device for deterring birds from roosting or resting on building ledges and the like substantially as hereinbefore described with reference to the accompanying drawings.

Inventors: WAY MICHAEL FREDERICK WILLIAM, WAY, MICHAEL, FREDERICK, WILLIAM
Applicants: WAY MICHAEL FREDERICK WILLIAM, WAY, MICHAEL, FREDERICK, WILLIAM
Application year: 1989
Main classification: A01M29
IPC codes: A01M29, E04B1