GB2222614A - Security device for the top of a wall or gate - Google Patents

Abstract

A security device comprises an elongate member 14 out of which a plurality of integral spikes 11 have been punched. The elongate member may be formed of right-angle section bar having two planar faces from which said spikes are outwardly punched, or, as shown, two such angle section bars are adjoined along their free longitudinal edges to form a rotatable security device. Preferably, as shown, the spikes are twisted to make the spikes more rigid. <IMAGE>

Description

SPIKED SECURITY DEYICE FOR A WALL OR GATE -'----- This invention relates to a spiked security device for a wall or gate and is preferably rotatable.

Conventionally broken glass or barbed wire was fixed around the upper end of security walls or gates.

More recently, however, planar bars having blades or spikes welded thereon have been fixed to the wall top (see Patent No. Au 81/3167). A further improvement is a rotatable spiked device, such as having metal prongs bent around an axle as shown in Fig. 8 hereinafter.

These devices can, however, be expensive to manufacture.

It is an object of the present invention to provide a security device at a economical price.

According to the present invention there is provided a wall gate security device comprising an elongate member, out of which a plurality of integral spikes have been punched.

This punched-out form of spike in contrast to a welded spike, is less labour intensive and thereby more economical to produce.

When the invention utilises a bar (defined herein as a suitably thin elongate member) the device can be mounted on the top of a wall with the spikes extending upwardly.

Many forms of security device can be made with integral punched-out spikes. A preferred embodiment of the invention uses an angled bar through which spikes are punched-out in one or more faces. Thus such angled bars can conveniently be connected to a similar angled bar, along their longitudinal free edges, to form a rotatable security device which would present spikes substantially throughout at a 360 degree rotation.

Although by angled bar we mn one with at least two planar type faces, preferably the bar is angled (most preferably right-angled) so that it can be used singly to engage the top edge of the wall and has integral spikes extending from sufficient faces that spikes are presented in use, extending outwardly from the side as well as the top of the wall. With a ri#ght-angled arrangement both relative perpendicular faces preferably have protruding spikes- to form this configuration of spikes at the top of the wall.

The spikes are preferably punched out to form an upstanding triangle and more preferably are twisted for increased strength.

Furthermore, although the spikes can be variably positioned, for smaller faced tars they are preferably punched out substantially linearly and about the longitudinal centre line of each face.

Having a spiked angled bar (not necessarily where the spikes are formed by punching) would appear to be new and has the advantage that when fitted to the upper edge of a wall, spikes can extend both from the top and side of the wall.

According to a second aspect ol the invention a security device comprises an elongate member adapted to engage the upper edge of a wall, and having spikes extending outwardly so that in-use spikes are presented extending outwardly from the side and top of the wall.

Preferably the elongate member is an angled bar (most preferably right-angled). Such angled bars can be formed, as described hereinbefore, into rotatable spiked security devices.

The invention will now be described by way of example only with reference to the accompanying drawings, in which: Fig. 1 is a side elevation of a first embodiment of gatejwall security device according to the invention comprising a planar bar with a plurality of upstanding spikes; Fig. 2 is a front/rear elevational of the spiked bar in Fig. 1; Fig. 3 is a side elevation of a second embodiment of a security device according to the invention comprising a right-angled bar with spikes punched outwards along each face.

Fig. 4 is a fl-ontear eleyation of the spiked angled-bar in Fig. 3, Fig. 5 is a plan ties of a third embodiment of a security device according to the invention and comprises two of the angled bars, shown on Figs. 3 and 4, welded together to form a rotatable device; Fig. 6 is a irontjrear elevation of the rotatable security device in Fig. 5 with a rotatable end piece; Fig. 7 is a side and front elevation of the end piece; Fig. 8 is a--perspedtive view of a prior art device.

Referring to Fig. 1, a security device for mounting on the top of a prefabricated wall is formed from a planar bar 10 having upstanding spaced triangular spikes 11 punched thereout along its length and leaving corresponding holes 12 (Fig. 5). For additional strength, the spikes are punched out linearly along the longitudinal centre line and are twisted through 90 degrees about their vertical axis (see also Fig. 2). Secondary holes 13 are punched through the bar 10 adjacent each spike 11 and remote from their corresponding holes 12 (Figs. 1 and 5).

Figs. 3 and 4 show another embodiment of the invention showing a right-angled bar 14 for engaging the top edge of a wall. The spikes 11 shown are punched outwardly for one face 14a of the right-angled bar 14 but more preferably are punched outwardly from both faces 14a and 14b. In this form the spikes will be perpendicular and will extend from the side as well as the top of the wall.

The right-angled bar 14 has another major advantage; it can be space welded (weld spots 15 in Fig. 5) with a similar angled bar 14 to form a rotatable box-section 14, 14 security device (Figs. 5 to 7) which, because the spikes 11 are punched out, is very economical to produce.

Furthermore because of the box-section arrangement of the faces deterrent spikes are pxesented throughout a 360 degree revolution of the device.

The rotatable device is mounted on brackets (not shown) at each end of wall or gate and are engageably rotatable therewith by two end bolts 16each at which extends through an aperture 17 provided in a square plate 18 anchored at either end of the box-section bar member 14, 14.

Although the spikes 11 are conveniently punched out, in the angled bar embodiment of Figs. 3, 4 a security device is formed in accordance with the second aspect of the invention. Irrespective of how the spikes (for example 11) are formed, as long as the bar 14 can be positioned on the top of a wall and the spikes are arranged to extend dettrently both from the top and side of the wall. In the embodiment of Figs. 3 and 4, the spikes 11 would extend from both respective perpendicular faces 14a and 14b, and so in use would be presented protruding from the top and side of the wall.

This right-angled spiked device of Figs. 3 and 4, could of course be connected to a similar angled device to provide å rotatable security device for example, with welded spikes and suitable for a wall or gate.

Claims (15)

1. A security device comprising an elongate member, out of which a plurality of integral spikes have been punched.

2. A security device as claimed in Claim 1 wherein the device can be mounted upon a wall, fence or the like with the spikes extending upwardly.

3. A security device as claimed in any preceding claim formed from an angle section bar from which spikes are punched out in one or both faces.

4. A security device as claimed in Claim 3 wherein two angle section bars can be adjoined along their longitudinal free edges to form a rotatable security device which may present spikes substantially throughout a 3#uU degree rotation.

5. A security device as claimed in any preceding claim wherein the angle section bar has at least two planar type faces from which spikes are punched, said planar faces being at right-angles to one another.

6. A security device as claimed in any preceding claim wherein the security device when in engagement with the top edge of a wall, fence or the like has integral spikes extending from sufficient faces such that spikes are presented in use, extending outwardly from the side of the wall, fence or the like as well as upwardly from the top of the wall, fence or the like.

7. A security device as claimed in any preceding claim wherein the spikes are punched out to form an upstanding triangle.

8. A security device as claimed in any preceding claim wherein the spikes are twisted for increased strength.

9. A security device as claimed in any preceding claim wherein the spikes are punched out substantially linearly and about the longitudinal centre line of each face of the elongate member.

10. A security device comprising an elongate member adapted to engage the upper edge of a wall, and having spikes extending outwardly so that in use spikes are presented extending outwardly from the side and top of the wall.

11. A security device as claimed in Claim 10 wherein the elongate member is an angle section bar and two such angle section bars can be formed into a rotatable security device.

12. A security device as claimed in Claims 10 and 11 inclusive wherein the angle section bar is a right-angled section bar.

13. A security device substantially as hereinbefore described with reference to figures 1 and 2 of the drawings.

14. A security device substantially as hereinbefore described with reference to figures 3 and 4 of the drawings.

15. A security device substantially as hereinbefore described with reference to figures 5, 6 and 7 of the drawings.