Abstract: An apparatus for inhibitively preventing birds from gathering comprises at least three support columns, wire members tightly spanned between adjacent said support columns, and a plurality of magnet members disposed onto said wire members respectively. An improved apparatus according to the present invention includes an oscillation transmission mechanism to transmit oscillating motion from one to another adjacent wire members. In this apparatus, when a single wire oscillates, one and another of adjacent wire members oscillate by means of the oscillation transmission mechanism.

Abstract: The present invention provides an apparatus for inhibitively preventing birds gathering wherein the wire-shaped member spanned between the adjacent support columns will not slack or break, nor will the support column fall, even when the wire-shaped member is trodden with shoes; a wire-shaped member 2 is tightly spanned between the adjacent support columns 1 in nearly the horizontal direction, and onto the wire-shaped member 2, magnetic members 3 are disposed by any means in an evenly spaced relationship; and at least one springy member is interposed between the support column 1 and the wire-shaped member 2 or on the middle portion of the wire-shaped member. With this structure, if the wire-shaped member is trodden with shoes, the elasticity of the springy member absorbs the force and prevents the wire-shaped member from slacking or breaking.

Abstract: Birds, especially, pigeons dislike the presence of a magnetic field because each bird has a biological instinctive ability of sensing the presence of the magnetic field. In order to utilize this biological instinctive sensing ability for the purpose of preventing birds from crowding at the upper part of a building, a plurality of magnetic members are disposed on an arm(s) turnably held at the uppermost end of a support column. When a bird perches on the arm, the latter is turned by the action of his own dead weight, resulting in the bird amazingly flying away from the arm. It is effective that a rotary wind blade having two magnetic members immovably secured to the opposite sides thereof is disposed at the uppermost end of each support column so as to largely affect the magnetic field induced by the magnetic members disposed on the arm and the magnetic members disposed on the rotary wind blade.

Abstract: Birds, especially, pigeons dislike the presence of a magnetic field because each bird has a biological instinctive ability of sensing the presence of the magnetic field. In order to utilize this biological instinctive sensing ability for the purpose of preventing birds from crowding at the upper part of a building, a plurality of magnetic members are disposed on an arm(s) turnably held at the uppermost end of a support column. When a bird perches on the arm, the latter is turned by the action of his own dead weight, resulting in the bird amazingly flying away from the arm. It is effective that a rotary wind blade having two magnetic members immovably secured to the opposite sides thereof is disposed at the uppermost end of each support column so as to largely affect the magnetic field induced by the magnetic members disposed on the arm and the magnetic members disposed on the rotary wind blade.

Abstract: Birds, especially, pigeons dislike the presence of a magnetic field because each bird has a biological instinctive ability of sensing the presence of the magnetic field. In order to utilize this biological instinctive sensing ability for the purpose of preventing birds from crowding at the upper part of a building, a plurality of magnetic members are disposed on an arm(s) turnably held at the uppermost end of a support column. When a bird perches on the arm, the latter is turned by the action of his own dead weight, resulting in the bird amazingly flying away from the arm. It is effective that a rotary wind blade having two magnetic members immovably secured to the opposite sides thereof is disposed at the uppermost end of each support column so as to largely affect the magnetic field induced by the magnetic members disposed on the arm and the magnetic members disposed on the rotary wind blade.