Abstract: An intrusion detection device that can be used singly or in multiplicity to immediately and silently alert the user of attempts to climb over a security fencing system. The invention consists of a base element which attaches to the security fencing, and an alarming arm. The alarming arm is equipped with barrier material, such as concertina wire or barbed wire. The alarming arm is connected to the base element both at a pivot point and through a tensioning means. Attempts to climb over the barrier material result in additional loading of the alarming arm which rotates transversely about the pivot point, and against the force of the tensioning means. This rotational displacement of the alarming arm enables an electrical sensing device which then signals that an intrusion is in progress.

Abstract: A bird repellent apparatus which is specifically designed for installation on telephone and electrical wires and the like or other extremely narrow, elongated surfaces to which it would be difficult, if not impossible to install any prior art bird repellent apparatus. More specifically, a channel member is configured for receiving a large plurality of top members in a continuous serial array, wherein preferably the prongs of a plurality of top members all lie in the same or substantially the same plane. In the preferred embodiment disclosed herein, the channel member is affixed either by adhesive materials or fastening elements to a cable clamp which, in one exemplary embodiment, comprises a pair of matching C-shaped members having flanges, at least one of which can be selectively fastened by a fastener, such as a bolt or a rivet. The clamp is adapted to encircle and compressively engage a cable, such as a telephone wire or electrical wire.

Abstract: A barrier is fixed on a wall or other perimeter structure by way of support posts. The barrier has a support shaft along which a number of rotatable units are mounted. Each rotatable unit is formed from two interengaged elements, each element having been formed from a length of metal tubing. Part of the tubing has been cut longitudinally to define blades extending from one end of a tubular portion, and splayed outwardly and spaced apart. Two such elements are assembled so that their blades interengage to form one of the units. The rotatable units so constructed are simple to manufacture, but provide an effective barrier.

Abstract: A novel apparatus and system for securing the integrity of an enclosure against escape or entry by cats. The invention provides a retrofit for common suburban fences which doesn't detract from the ambiance of the garden or injure the cats trying to get in or out.

Abstract: An attachment to a fence, such as a chain link fence, used to confine a dog, prevents the dog from climbing the fence or using the top of the fence to assist himself in escaping over the fence. The attachment creates a region of instability, superjacent the top of the fence, which will not support the dog's weight and thus does not allow the dog to cling to or push off of the top rail of the fence. The region of instability is created by a freely rotatable roller attachment or a flexible panel attachment, both of which yield under the weight of the canine.

Abstract: A net for a ball game comprising vertical end posts (1,2) and a vertical center post (3), a cross bar (7) extending between the end posts and the center post adjacent their upper ends to define the "height" of the net, a multiplicity of rows of net line (10) extending between each end post and the center post to provide a visible "net", the adjacent lines (10) being spaced sufficiently to allow a ball to pass when played at a level which is lower than the level of the net, the post (1,2,3) being hollow, the end posts receiving retaining member for the ends of the net lines (10), the center post (3) having a central rotatable tube (25) through which the net lines (10) pass, the net lines (10) being retractable within the center post (3) by rotation of the tube (25).

Abstract: The invention provides an elongate security rail comprising a land extending in the long direction of the rail and which is connectable to the top edge of a wall or the frame of a framed fence. A series of barbed palings one spaced apart on one side of the land, and a series of spikes one spaced apart on the opposite side of the land. The land, palings and spikes are formed integrally from a strip of flat metal and subsequently bent so as to project in a generally upward direction when the land is connected to the wall. This invention also provides a method of making such a security rail.

Abstract: A barrier for preventing pigeons from landing on a balcony rail comprising a pair of support brackets adapted for flush mounting to opposite ends of the balcony rail, and a plurality of monofilament wires secured between the pair of support brackets.

Abstract: A method of forming a wall security fixture of the kind having an elongate rail and a plurality of upstanding palings connected to the rail. In the method, a flat sheet of material is punched to form a series of flat, intermediate paling members which are located side-by-side in complementary relationship. The individual intermediate members are then folded about an axis of symmetry to form V-shaped palings which have outwardly splayed end portions which can be welded or otherwise fixed to the web of a channel-shaped rail to secure the paling to the rail. The invention extends to wall security fixtures formed according to the method.

Abstract: A security fence including multiple laterally spaced fence posts extending upwardly from ground anchored lower end portions at an arcuate inclination of approximately 50.degree. to 65.degree.. The posts are interconnected by horizontal rails and mount wire mesh or the like. The fence terminates in an upper terminal end portion vertically above the ground and laterally offset from the lower portion of the fence to preclude direct physical access to the upper terminal end portion.

Abstract: A fence support member to attach to an existing fence post or wall, the support member including an elongated support arm and a fastening assembly to fasten the support arm to the fence post or wall. The support arm has spaced slots or holes therein to receive and retain strands of wire or fencing. The support arm has a first end which is designed to abut the existing fence post or wall. The first end includes first and second abutment surfaces which are located on the edge of the first end of the support arm. The abutment surfaces are at an acute angle with each other. The fastening assembly includes a pair of L-shaped brackets, one positioned on each side of the support arm and a U-bolt which is employed to attach the brackets to a fence post. The support arm can be attached to a fence post or wall such that the support arm extends parallel or at an acute angle to the fence post or wall, depending on which abutment surface is in contact with the fence post or wall.

Abstract: Barrier apparatus including a plurality of generally longitudinally extending barrier members, such as a plurality of strands of barbed wire or a plurality of strands of razor ribbon, and support means for supporting the barrier members in generally cylindrical and circularly spaced apart configuration.

Abstract: An apparatus and a method for enabling changes in the height of a cross bar in athletic equipment, such as pole vaulting equipment. The apparatus generally comprises a pair of adapters for attachment to the upright standards which have a plurality of outwardly extending arms thereon. The adapters also have arms which can be located above the uppermost of the arms on the standards or below the lowermost of the arms on the standards and which arms on the adapters are also located to receive and hold the cross bar thereon.

Abstract: A tubular fence post has a U-shaped cut-out portion to receive a top rail, the upward extension of the fence post walls being bendable over the top rail to secure it. In a second embodiment, one of the upward extensions forms a barb arm that attains a diagonal orientation when bent over the top rail. A shorter upward extension opposite the barb arm has a lock tab bendable over side tabs of the barb arm.

Abstract: An extension for a fence of the chain link type, the extension having an upper panel portion and having mounting leg portions extending downwardly therefrom and passing vertically through openings in the chain link fabric to secure the extension thereto, each leg portion having an abutment thereon to limit downward travel of a leg portion into the fabric and having detents especially shaped and located along the leg surfaces to cooperate with the wires of the fabric to resist upward withdrawal of the leg portion from the fabric, once installed.

Abstract: A fastener for securing a fence post cap to a channel type post. The fence post cap has a side wall and a bottom wall received in the open upper end of the post and a top wall which extends away from the post to engage a horizontal top rail of the fence. The bottom wall of the cap has an aperture through which a bolt extends. The fastener is a curved sheet metal member having an aperture to receive the bolt. A nut provided on the bolt can be tightened to cause the sheet metal member to be flattened whereby its edges bite in to the interior walls of the post. The fastening means is also used to secure a barbed wire arm to the post. The base of the barbed wire arm extends into the post so as to be adjacent the bottom wall of the cap and the bolt extends through the base of the barbed wire arm as well as passing through the bottom wall of the cap and the fastening means.

Abstract: A fence which provides an effective barrier to the attempts of children to climb and which is of durable and attractive appearance is formed of molded or stamped panels connected to support posts and a fence cap interlocking with the upper ends of the panels. Openings to reduce wind loading on the fence are provided in the panels and are configured so as not to provide hand or foot holds for children. A self-closing gate with a child-resistant latch is also provided.

Abstract: An attachment is illustrated for extending an existing chain link fence accommodating same to the stringing of barbed wire thereabove. The attachment contemplates the use of a vertical angle extending as a base to be received upon a vertical post of the existing fence for carrying an upright member having barbed wire receiving and securing means thereon in such a way that the upper fence supports do not have to be removed for accommodating the attachment.

Abstract: A plurality of metallic tubular uprights incrementally spaced along the top of a fence or similar structure, are each provided with a plurality of upwardly outwardly flared knife-edge segments to prevent climbing of the fence.