Technical Field The invention relates to security devices for doors and/or windows. Specifically, the invention relates to removable security devices which can prevent a hinged door from being opened from the exterior side.

Background

The present invention is applicable to door and window assemblies. Hinged doors and windows typically consist of a door or window leaf housed within a door or window frame. For ease of description, both door and window assemblies will be described throughout with reference to door assemblies only.

One edge of the leaf, the "hinged edge" is connected to the frame by one or more hinges. The opposite edge of the leaf, the "free edge" is typically provided with one or more locks to provide security. However, many commonly available locks have security flaws which make them vulnerable to attack by people wishing to break into a property. Doorways thus present a vulnerability for any building.

It is often desired to provide increased security beyond only door locks. This is especially true when a property is going to be closed for an extended period of time, for example, if the occupiers are going on holiday or the property is unoccupied. In other situations, it is desirable block unnecessary doors which would go unused. It is thus desirable to provide a security device which can improve the security of a door and which is not vulnerable to an attacker breaking or picking a lock.

In more extreme situations, such as a terrorist attack or emergency lock-down of a building, it is desirable to disable a door quickly. In such situations, it is desirable to fit a physical barrier to restrict the movement of the door. Summary

Existing devices are deployed to disable the door handle or, for inward opening doors, to fit under the door leaf and brace around the door frame on the attack side of the door. An upstand on the opposite side of the door then prevents the door leaf being opened, with the bracing effect stopping the attacker removing the device.

Figure 1 shows a plan view of an existing security device fitted to an inwardly hinged door with an exterior side A and an interior side B. The device comprises an upstand 2 and a pair of hooked arms 3. To aid installation, the hooks are laterally movable as shown by arrows C. In use, the upstand 2 is placed against the interior face of the door leaf 1 and the hooked arms 3 passed underneath the door leaf 1. The hooks 3 are then moved outwardly where they can hook onto the door frame 4. The bar 2 is thus locked in position relative to the frame 4. When installed, the door leaf 1 cannot be opened, since the upstand 2 blocks the door's path F.

The present inventors have identified two significant flaws with this product. Firstly, the device cannot be used for outwardly hinged doors, since the upstand is located on the interior side B. The device cannot be fitted reversed, since the device is fitted and adjusted from the upstand side of the product. Secondly, if the hooks do not precisely fit the frame, the blocking effect is reduced. If too small, then the hooks cannot hook around the frame. If too large, then the door can be opened partially and potentially levered open. The present invention thus seeks to resolve or ameliorate one or more of the problems of existing products, or provide a useful alternative thereto.

According to a first aspect of the invention, there is provided a removable security locking device for a door or window assembly. The device may comprise a barrier extending in a lengthwise direction. The device may comprise a first locking section. The first locking section may be coupled to the barrier. The first locking section may comprise a first engaging portion. The device may comprise a second locking section. The second locking section may be coupled to the barrier. The second locking section may comprise a second engaging portion. Said engaging portions may be offset from the barrier in a lateral direction relative to the lengthwise direction. The lengthwise and lateral directions are non-parallel and between them define a plane. At least one of said engaging portions may be movable in the lengthwise direction, or have a component of its movement in the longitudinal direction. The offset, i.e. the separation between the engaging portion and the barrier, for at least one of said engaging portions may be adjustable.

In some embodiments, at least one of the engaging portions is moveable in the lengthwise direction relative to the other engaging portion. In some embodiments the first and second engaging portions are moveable relative to the barrier and/or each other.

In some embodiments, the barrier may be extendable. The barrier may be extendable in the lengthwise direction. The barrier may comprise a first barrier portion and a second barrier portion. The first and second barrier portions may be configured to be moveable relative to each other. In some embodiments, the first and second barrier portions may be telescopic. In some embodiments, the first barrier portion is coupled to the first locking section, and the second barrier portion is coupled to the second barrier portion, and the engaging portions are moveable in the lengthwise direction by moving the first and second barrier portions relative to each other in the lengthwise direction.

The engaging portion movable in the lengthwise direction may also be the engaging portion wherein the offset is adjustable. In some embodiments, both engaging portions are movable in the lengthwise direction. In some embodiments, the offset for each engaging portion is adjustable. In some embodiments, the offset of the first and second engaging portions may be adjustable, and the first engaging portion may be movable in the lengthwise direction. The second engaging portion may be fixed in the lengthwise direction relative to the barrier.

The barrier may extend in a third direction, transverse to the lengthwise direction and lateral direction. The barrier may comprise a plate or upstand. The barrier may comprise a tube. The tube may have a circular or polygonal cross-section. For example, the tube may have a square or rectangular cross-section.

The first and/or second locking section may be coupled to the barrier by one or more fasteners, such as a screw, a nut and bolt or a pin. The first and/or second locking section may comprise a plurality of fixing holes for receiving the fasteners. The plurality of fixing holes may extend in the transverse direction. The offset of at least one of the engaging portions may be adjusted by coupling the barrier to the first and/or second locking section through different fixing holes.

The first and/or second locking section may comprise a shaft portion. The barrier may comprise a plurality of holes. The holes may be separated in the lengthwise direction. The holes may be configured to receive the shaft portion or portions therethrough. The lengthwise position of the first and/or second locking member may be adjustable by moving the locking position between holes.

The removable security locking device may further comprise a locking mechanism for locking the engaging portions in position. The locking mechanism may be located on the barrier or it may be located on one or both of said locking sections. The first locking section and/or the second locking section may be coupled to the barrier by the locking mechanism. The locking mechanism may be configured to restrict adjustments to the lateral offset of the first and/or second engaging portion.

The locking sections may extend from the barrier on a first side thereof. The locking mechanism may be located on the opposite side of the barrier to the locking sections. The device may be configured so that, in use, the locking mechanism is located on the interior side of a door leaf.

The locking mechanism may comprise a ratchet mechanism. For example, it may comprise a series of teeth and a pawl for engaging the teeth and restricting relative movement. The teeth may be located on a toothed portion of the locking section. The barrier may comprise an aperture for receiving the toothed section. The barrier may comprise the pawl. The ratchet mechanism may comprise a biasing means for biasing the pawl against the toothed portion.

The locking mechanism may comprise a rail and pin mechanism. For example, the rail may comprise a series of holes for receiving the pin. The barrier may comprise an aperture through which the rail may be inserted. The pin may be configured to prevent the rail from being moved through the aperture in the barrier, when received in one of the series of holes. The locking mechanism may comprise a threaded shaft and nut. The barrier may comprise an aperture through which the treaded shaft may be inserted. The nut may be configured to prevent the threaded shaft from being moved through the aperture in the barrier, when coupled with the threaded shaft.

In embodiments the barrier comprises a first and second barrier portion, the locking mechanism may be configured to prevent or restrict movement of the first and second barrier portions relative to each other. The locking mechanism may comprise a rail and pin mechanism. One or both of the first and second barrier portions may comprise at least one locking hole to receive the or a pin. The pin may be configured to abut one or both of the first and second barrier portions to prevent movement past the pin. Preferably the locking mechanism may be configured to prevent the first and second locking sections being moved toward each other.

In use, the barrier may be configured to abut one of: a door leaf or door frame, on a first side thereof. The first and second engaging portions may be configured to abut the other of said door leaf and door frame, on a second side thereof. The removable security locking device may be configured to, in use, abut a door frame on a trailing side thereof. The removable security locking device may be configured to, in use, abut a door leaf on a leading side thereof. For example, the first and/or second engaging portion may be configured to, in use, abut a door frame. The barrier may be configured to, in use, abut a door leaf. The barrier may be configured to extend fully across a doorway.

The first engaging portion may extend from the first locking section in the lengthwise direction. The second engaging portion may extend from the second locking section in the lengthwise direction. The first and/or second engaging portion may comprise a flange portion. The first and/or second locking sections and engaging portions may comprise hooks or hooked arms.

The first and/or second locking section may be rotatable relative to the barrier. The first and/or second engaging portion may be rotatable relative to the barrier. The device may comprise a locking mechanism for restricting rotation of the first and/or second locking section or the first and/or second engaging portion.

The first and/or second locking section comprises a plate or bar. The first and/or second locking section may be configured to be insertable between a door leaf and door sill. For example, the first and/or second locking section may be configured to be insertable underneath a door leaf.

The first and/or second engaging portion may be moveable relative to the locking section. The first and/or second engaging portion may be pivotally coupled to the locking section. The pivotal coupling may have a pivot axis. The pivot axis may be transverse to the lengthwise direction of the barrier.

In some embodiments, one or both of the first and second locking sections may be provided with a door block. The door block may be configured to abut a door leaf on the opposite side of the door relative to the barrier e.g. the door block may be offset from the barrier. The door block offset may be adjustable. The at least one door block may be coupled to the first and/or second locking sections by at least one fastener. The at least one fastener may be an anti-tamper fastener.

In some embodiments, the barrier may be provided with a spacer or insert. The spacer or insert may be configured to be located between the barrier and the or a door or window leaf. The spacer or insert may be configured to contact the door leaf. The spacer or insert may be configured to take up space so that the door is held tightly in position and/or movement of the door leaf is strongly resisted. This may be advantageous, since if the door is permitted to open a small amount, it may be possible to insert tools or weapons through the narrow opening. The spacer or insert may be configured to account for door assemblies wherein the surface of the door is offset from the edge of the door frame. The spacer or insert may be configured to clip on to the barrier. In some embodiments, the spacer or insert may be wedge shaped.

The spacer or insert may be connectable to and moveable relative to the barrier. The spacer or insert may be moveable in the direction D. The spacer or insert may be connectable to the barrier by a threaded member. The spacer or insert may be moved (e.g. in the direction D) by rotating the threaded member. In some embodiments, the spacer or insert may be connectable to the barrier by an over-centre locking arm. Thus, the spacer or insert can be very quickly locked in position against the door leaf by actuating the over-centre locking arm. In some embodiments, more than one threaded member or over-centre locking arm may be used.

According to a second aspect of the invention, there is provided a removable security locking device for a door or window assembly, the device comprising:

a barrier extending in a first direction,

a locking section extending from the barrier in a second direction lateral to the first direction,

the first and second directions defining a plane,

wherein the locking section comprises an engaging portion moveable from a first configuration, wherein the engaging portion lies substantially in said plane, to a second configuration, wherein the engaging portion extends away from said plane.

The barrier may extend in a third direction, transverse to the length and lateral direction. The barrier may comprise a plate or upstand.

The engaging portion may be movable to a third configuration, different to the first configuration, wherein the engaging portion lies substantially in said plane.

The first configuration may comprise a retracted configuration. In the first configuration, the engaging portion may be substantially parallel to the locking section. In the second configuration, the engaging portion may extend in the third direction. In the second configuration, the engaging portion may be substantially transverse to the locking section.

The engaging portion may be offset from the barrier in a lateral direction. The engaging portion may be configured so that the offset is adjustable. The device may comprise any one or more of the adjustment mechanisms described in the first aspect of the invention.

The removable security locking device may further comprise a biasing mechanism for biasing the engaging portion into the second configuration. The biasing mechanism may comprise a spring assembly. The spring may comprise a torsion spring. The engaging portion may be moveable into the first configuration by applying a force to the engaging portion. The force may be opposite the force of the biasing mechanism. The biasing mechanism may be configured to bias the engaging portion into the second configuration automatically, for example, upon removal of said force.

The engaging portion may be pivotally coupled to the locking section. The engaging portion may pivot about a pivot axis. The pivot axis may be parallel to the length of the barrier.

The engaging portion may be pivotally coupled to the locking section by a hinge. The hinge may be located on the leading edge of the locking section. The hinge may comprise a rotation restrictor configured to prevent the engaging portion from pivoting past a predetermined point. The predetermined point may be a predetermined angle relative to the locking section. The predetermined angle may be substantially 90°.

The engaging portion(s) may be moveable in the lateral direction once in the second configuration. The engaging portion may be moveable towards the barrier in order to engage with a one side of a door, for example, while the barrier engages with a door frame on the opposing side of the door, to prevent relative movement of the door relative to the door frame. The movement may be permitted towards the barrier, but prevented away from the barrier, at least without decoupling or unlocking or unlatching the locking section from the barrier. In this way, the engaging portion and barrier can be pulled tight to the door, but not released unless desired, in embodiments from the barrier side of the door.

In further aspects of the invention, there is provided a security device for, in use, restricting movement of a door or window leaf in a door assembly and/or relative to a door or window frame.

The security device may comprise:

a first surface for abutting one of the leaf or frame on an interior side of the assembly, a second surface for abutting the other of said frame or leaf on an exterior side of the assembly, and

a support connecting the first and second surfaces, wherein optionally, the security device is configured so that the separation between the first and second surface is adjustable and/or

the second surface is pivotally connected to the support. The security device may comprise:

a barrier having a longitudinal axis,

a locking section extending from the barrier in a lateral axis,

wherein the locking section comprises an engaging portion moveable from:

a first configuration, wherein the engaging portion is substantially parallel to the locking section

to a second configuration, wherein the engaging portion extends away from the lateral axis.

The security device may comprise a barrier portion. The first surface may be located on the barrier portion. The support may comprise at least one hook comprising a stem for extending past the leaf and a flange comprising said second surface. The hook may be adjustably connectable to the barrier portion. The barrier portion may comprise at least one aperture and the hook may comprise an adjustable connecting portion configured to extend through the aperture for adjustably connecting the arm and the barrier portion. The hook and/or arm may be rotatable relative to the barrier portion. The barrier portion may comprise a rotation restrictor configured, in use, to restrict the rotation of the hook and/or arm relative to the barrier portion.

The second surface may be pivotally movable from a retracted position, wherein the second surface does not abut the leaf or frame, to an engaging position, wherein the second surface does abut the leaf or frame. In the retracted position, the second surface and the support may be approximately parallel. In the engaging position, the second surface and the support may be substantially transverse. It will be understood that any feature of any of the aspects of the invention may be combined with any further feature or aspect described herein.

Brief Description of the Drawings Examples of the invention will now be described, by way of example, with reference to the following drawings, in which:

Figure 1 is a known security device according to the prior art;

Figure 2 is a plan view of a security device;

Figure 3 is a plan view of a second embodiment of security device;

Figures 4A to 4C are a side on cross sectional view through the line E-E of

Figure 3;

Figure 5 is a perspective view of a security device; and

Figures 6A-C are zoomed in views of the regions X, Y and Z of Figure 5.

Specific Description of the Figures

Turning now to Figure 2 there is shown a removable security locking device 10 when fitted to a door assembly consisting of a door leaf 1 within a door frame 4.

The device 10 has a barrier 12, in the form of an elongate bar with a length C which extends across the width of the door frame 4. Coupled to the barrier is a first locking section 14 and a second locking section 16. The first locking section has a first engaging portion 18 and the second locking section has a second engaging portion 20. The first and second engaging portions 18, 20 extend from the first and second locking sections in the lengthwise direction.

The engaging portions 18, 20 of the first and second locking sections 14, 16 are offset from the barrier 12 in a lateral direction D. The first and second locking sections 14, 16 are coupled to the barrier 12 by an adjustable mechanism 22. The engaging portions 18, 20 and at least the portions of the first and second locking sections adjacent thereto are flat. The adjustable mechanism 22 can be any suitable mechanism, such as a ratchet mechanism, threaded shaft and nut, rail and pin mechanism etc. By adjusting the adjustable mechanism 22, the offset of the engaging portions 18, 20, relative to the barrier 12 in the lateral direction D can be adjusted. Thus, the device 10 can be adjusted to fit closely to a range of doorways with differing thicknesses of door leafs and frames. The barrier 12 comprises a series of holes (not shown) spaced along it in the lengthwise direction of the barrier C. The holes can receive the adjustable mechanism, and thus adjust the relative position of the first and second locking sections 14, 16. Thus, the device is quickly and easily configurable to fit a range of doorways with differing widths.

In use, the barrier 12 and the locking sections 14, 16 can be detachable from each other. In some variants, only one of the locking sections is detachable. The locking sections 14, 16 and engaging portions 18, 20 can be slid under the door leaf 1 and moved into position against the door frame 4. The barrier 12 is then positioned in abutment against the inside (as pictured) of the door leaf 1 , and coupled with the first and second locking sections 14, 16. The door leaf 1 is unable to be opened, since it is blocked by the barrier 12. An attacker encountering the door from the opposite side is unable to move the engaging portions 18, 20 as they are connected to the locking sections 14, 16 which are, in turn, locked in position on the barrier 12 on the other side of the door, both in terms of movement in the lengthwise direction (C in the figure), and lateral direction (D in the figure), and the engaging portions 18, 20 in this way prevent removal of the device 10. Thus embodiments of the invention provide a very quick and secure method of disabling a door and allow it to be fitted to a variety of sizes and thicknesses of door and door frame due to the adjustability of the engaging portions 18, 20 in two dimensions, namely lengthwise and laterally. This embodiment is preferred for inwardly hinged doors, since the barrier would be on the "wrong" side for blocking an outwardly hinged doorway, because the barrier and the fixings of the locking sections would then be available for interference by an attacker wishing to gain entry.

Turning now to Figures 3 and 4A to 4C, there is shown a further embodiment of the invention.

In Figure 3, the removable security locking device 50 is attached to a doorway comprising a door leaf 1 and door frame 4 viewed from above. For ease of description, the locking device 50 is shown in solid lines, however it is located beneath the door leaf 1.

The device 50 has a barrier 52 which extends in a lengthways direction. Extending laterally from the barrier 52 is a locking section 54. The locking section 54 is provided with an engaging portion 58 in the form of a plate, which in the present embodiment is "C"-shaped. The locking section 54 is coupled with the barrier 52 in the same manner as described in Figure 2, and thus the lateral offset of the engaging portion 58 is adjustable in the lateral direction D.

The engaging portion will be described in greater detail with reference to Figures 4A to 4C which show a side-on view of the device 50.

The engaging portion 58 is coupled to the locking section 54 by a hinge 60. The hinge comprises a biasing mechanism comprising a spring 62, which can be a conventional torsion spring. The spring 62 is configured to push the engaging portion 58 into the configuration shown in Figure 4B. However, by applying a force against the biasing mechanism, the engaging portion 58 can be pushed flat against the locking section 54 as shown in Figures 3 and 4A. The flat locking section 54 of the device 50 can then be inserted under the door leaf 1 , as in Figure 4A.

The device 50 is then pushed further under the door leaf 1 until the free end 59 of the engaging portion 58 is clear of the door leaf. The spring 62 then biases the engaging portion 58 into the upright position as shown in Figure 4B. The hinge 60 is configured to prevent rotation past this position.

The locking section 54 of the device 50 is then pulled in the direction of the arrow in Figure 4C until the engaging portion 58 directly abuts the surface of the door leaf 1. In other words, the engaging portion 58 is pulled back towards the barrier 52. The offset of the locking sections can then be adjusted so that the barrier 52 abuts the frame 4 on the other side of the door as shown in Figure 3 while the engaging portion 58 abuts the side of the door opposite that at which the barrier 52 is positioned.

This embodiment of Figure 3 and 4A to 4C is preferred for outwardly hinged doors, i.e. where the door leaf would be pushed outward and an attacker would pull the door toward them to open it. The barrier 52 cannot prevent the movement of the door, since it is on the "wrong" side of the door assembly. Thus, the sprung engaging portion provides a quick and secure mechanism by which to contact the leading face of the door leaf 1. The adjustable offset is optional but not essential. In other embodiments, the movement of the engaging portion back towards the barrier after deployment may not be necessary, as the engaging portion may be configured to abut the door on deployment without subsequent pulling back of the engaging portion towards the barrier. Turning now to Figures 5 and 6A to C, there is shown a further embodiment of the invention. Figure 5 shows a removable security device 100, similar to the security device 10 of Figure 2.

The device 100 has a barrier 1 12, formed from first barrier portion 113A and second barrier portion 1 13B. The first barrier portion 113A is formed from metal tubing with a square cross-section, although it is understood that rectangular, circular or other cross- section tube are also applicable. The second barrier portion 1 13B is also formed from metal tubing and has external dimensions smaller than the internal dimensions of the first barrier portion 1 13A, and an outer cross-section that conforms with the inner cross- section of the first barrier portion 1 13A. The second barrier portion 113B is configured to fit within and be moveable in the lengthwise or axial direction relative to the first barrier portion 1 13A e.g. in the direction C in Figure 5.

The barrier 1 12 can be moved between an extended and a retracted configuration in order to adjust the length of the barrier 112. In the extended configuration, a small portion of the second barrier portion 113B is received within the first barrier portion 1 13A, as shown in Figure 5. In the retracted configuration, a larger portion of the second barrier portion 1 13B is received within the first barrier portion 1 13A, and thus the overall length of the barrier 1 12 is reduced. The retracted configuration is useful during storage of the security device and also during installation. By sliding the second barrier portion 113B relative to the first barrier portion 1 13A the length of the barrier 1 12 (in the direction C) can be quickly and simply adjusted telescopically. The first barrier portion 113A is provided with a series of fixing holes 117A extending therethrough at its outer end. Similarly, the second barrier portion 1 13B is provided with a series of fixing holes 1 17A through its outer end.

Coupled to the barrier 1 12 is a first locking section 1 14 and a second locking section 1 16. The first locking section 114 is formed from a substantially planar sheet of metal, and has a C shaped profile formed from an adjustable coupling portion 122 with a first end portion 1 1 1 at a first end and a first engaging portion 118 at the opposite end. The first end portion 1 11 and the first engaging portion 118 project in the lengthwise direction C from the adjustable coupling portion 122, parallel to the barrier 1 12. Thus the engaging portion 118 and the adjustable coupling portion 122 form a simple hooked arm. The adjustable coupling portion 122 has two parallel rows of fixing holes 117B extending along its length, in a direction transverse to the length of the barrier 112. The first barrier portion 1 13A is coupled to the adjustable coupling portion 122 by a pair of fasteners 123 which are inserted through the fixing holes 1 17A and the fixing holes 1 17B. As shown, the fasteners 123 are nuts and bolts, but alternative mechanical fasteners may also be used. Thus, the first engaging portion 1 18 is offset from the barrier 112 in a direction transverse to the length of the barrier by the length of the adjustable coupling portion 122. This offset can be easily adjusted by selecting which pair of fixing holes 117A, 117B to connect with the fasteners 123.

The second locking section 1 16 has a similar structure to the first locking section 114, with a second end portion 1 15 and a second engaging portion 120 connected by an adjustable coupling portion 122. The second locking section 1 16 is formed from a substantially planar sheet of metal, and has a C shaped profile formed from an adjustable coupling portion 122 with a second end portion 1 15 at one end and a second engaging portion 120 at the opposite end. The second barrier portion 1 13B is coupled to the adjustable coupling portion 122 by a further pair of fasteners 123 as described above. The second engaging portion 120 is offset from the barrier 1 12 in a direction transverse to the length of the barrier 1 12 by the length of the adjustable coupling portion 122. The second locking section 1 16 differs from the first locking section 1 14 in that the second end portion 115 and the second engaging portion 120 are each provided with a shoulder 121 and a reinforced region 125. The shoulder 121 projects upwardly, perpendicular to the second engaging portion 120. In use, the shoulder 121 forms a small vertical surface which extends parallel to the lengthwise direction of the barrier 1 12. The reinforced region 125 is a thickened region provided on the second engaging portion 120, and is provided on the opposite edge to the shoulder 121. The reinforced region 125 is provided in order to increase the thickness and thus strength of the second end portion 1 15 and the second engaging portion 120. The shoulder 121 and reinforced region 125 can be formed by stamping or bending the metal sheet which makes up the second locking portion 116, either through 90° to form the shoulder 121 or through 180° to form the reinforced region 125. Alternatively the shoulder 121 and reinforced region 125 can be formed by bonding or welding additional strips of metal to the second end portion 115 and the second engaging portion 120. The security device 100 should be configured so that the second locking section 1 16 is provided adjacent to the leading edge of the door in use. Since the door movement will be greatest at the leading edge of the door leaf, a greater force will be experienced on the second locking section 116. Thus, the shoulder is intended to spread any force applied to the security device 100 over a larger area of the door frame than if the shoulder 121 were not present.

Coupled to the adjustable coupling portion 122 of the second locking section 1 16 is a door block 130 (Figure 6B). The door block 130 is wedge shaped, and made up of a base 131 , a pair of triangular sides 132, 133 and a blocking face 134. The base 131 is located on the adjustable coupling portion 122. The blocking face 134 extends perpendicularly from the base 131 and thus from the adjustable coupling portion. The blocking face is aligned to face the barrier 1 12 and is parallel to the barrier 1 12 and also the shoulder 121. The triangular sides 132, 133 connect the base 131 blocking face 130. The angled face of the wedge shaped door block 130 faces away from the barrier and is open, so that the door block 130 is largely hollow. The door block 130 is coupled in position on the adjustable coupling portion 122 by a pair of fasteners 123B and a rectangular washer 135 which is received within the door block 130.

As shown in Figure 6C, the security device 100 has a locking mechanism 140 for locking the first and second barrier portions 1 13A-B in position relative to each other, or restricting their relative movement. The second barrier portion 113B is provided with a series of locking holes 141 extending through the second barrier portion perpendicularly to the length of the barrier 1 12 and a locking pin 142. . The series of holes 141 are spaced in a line along the length of the second barrier portion 1 13B. In the embodiment shown the locking pin 142 is removable. In order to lock the length of the barrier 1 12, the locking pin 142 is inserted into one of the locking holes 141 extending outwardly therefrom. The second barrier portion 1 13B is thus prevented from being inserted into the first barrier portion 113A i.e. from being moved lengthwise, since the locking pin 142 contacts first barrier portion 1 13A. Thus, the first and second locking sections 1 14, 1 16 are prevented from being moved towards each other in the lengthwise direction. In some embodiments, the locking holes 141 may be provided in both the first and second barrier portions 1 13A, 1 13B and the pin 142 inserted through a pair of aligned holes 141 from the first and second barrier portions 1 13A, 1 13B. Thus movement of the first and second barrier portions 1 13A, 1 13B relative to each other in either lengthwise direction is prevented, since the pin 142 will contact and block the inner surface of the holes 141. However, this is not strictly necessary, since in use further extension of the barrier 112 is restricted by the door frame to which the security device is installed. In some embodiments, the locking pin 142 can be connected to the first or second barrier portion 113A or 1 13B by a connector, such as a chain (not shown) to prevent it becoming lost. In alternative embodiments (not shown) the locking pin 142 is retained within the second barrier portion 113B and spring loaded, such that as the second barrier portion 1 13B is withdrawn from the first barrier portion 113A, the locking pin 142 is exposed and projects through one of the locking holes 141 , preventing the second barrier portion 113B from being reinserted. In further embodiments (not shown) the locking mechanism may be any other form of locking mechanism, such as a ratchet, or a nut and bolt arrangement. The removable security device 100 is intended to be used in a similar manner to the security device 10 as shown in Figure 2. It is able to be installed on both inwardly or outwardly hinged doors. In use, it is intended for the security device 100 to be configured to a specific door or window unit. It can thus be provided and stored nearby so that in emergency situations, it is readily at hand and clear for which door it should be applied. Since producing customised security devices to fit individual doors is prohibitively expensive, the present embodiment is instead readily adaptable to the majority of doors and window assemblies. Thus before the security device is installed, it requires preconfiguring to the door or window for which it is intended. In the security device 10 shown in Figure 2, the locking sections 14, 16 are movable both laterally and perpendicularly relative to the door 1 i.e. in the directions C and D. The security device 100 is adjustable, in use, in the lateral direction, i.e. direction C. Prior to use, the extension of the first and second locking portions 114, 116 i.e. the offset of the first and second engaging portions 118, 120 relative to the barrier 112 is adjustable and must be pre-set. This is achieved by selecting the appropriate fixing holes 1 17B to connect the barrier 1 12 to the first and second locking sections 1 14, 116. To shorten the separation between barrier 112 and the first and second engaging portions 1 18, 120, closer fixing holes 1 17B are selected and the nut and bolt fasteners 123 inserted and tightened. Since the first and second locking sections 1 14, 1 16 are configured for a specific doorway, there is no need for them to be adjustable in use. If a user wishes to re-configure the security device 100 for an alternative doorway, then the offset of the engaging portions can be simply adjusted by removing the first and second locking section 1 14, 1 16 from the barrier 1 12 and re-attaching in the correct position. Similarly, it is possible to adjust the maximum length of the barrier 112 by selecting which of the fixing holes 117 A to use at each end of the barrier 1 12.

To install the security device 100, the user will be positioned on the barrier side of the door way i.e. they will fit the security device 100 with the barrier 1 12 on their side of the door leaf, and the locking sections 1 14, 1 16 extending underneath the door leaf and away from the user.

For inwardly hinged doors, the door block 130 is omitted. As with the security device 10, for inwardly hinged doors, the first and second locking sections 1 14, 1 16 engage the frame adjacent to the door and the barrier 1 12 provides a physical block to prevent inward movement of a door leaf. To install the security device 100 on an inwardly hinged door assembly, the security device is offered up in a compact state, wherein much of the second barrier portion 1 13B is retained within the first barrier portion 113A, and the overall extension of the barrier 112 (i.e. the length of the security device 100 in the direction C) is less than the width of the doorway. The first and second locking sections 1 14, 1 16 are inserted underneath the door leaf. With door block 130 omitted, the second engaging portion 120 should still fit beneath the door. However, in door assemblies with very small clearances between door leaf and sill, the shoulder 121 may prevent insertion. In this case the door may be opened slightly and the second engaging portion 120 inserted through the gap, hooked underneath the door and the door closed. The barrier 112 is positioned adjacent the inside face of the door abutting the door leaf and the first and second locking section 1 14, 1 16 moved laterally of the door until the adjustable coupling portion 122 of each contacts the door frame. The locking pin 142 is then inserted into the open locking hole 141 closest to the first barrier portion. Thus the barrier cannot be removed from the exterior side by pushing the exposed first and second engaging portions 1 18, 120 together, since the movement is prevented by the locking pin 142.

For outwardly hinged doors, the barrier 112 is positioned on the wrong side of the door leaf to prevent movement of the door when the barrier is in position. Thus, the door block 130 is coupled to the adjustable coupling portion 122 of the second locking section 1 16 in a position where it will butt against the face of the door leaf on the exterior side (i.e. the side opposite to the user). The door block can be positioned in any of the fixing holes 1 17B as appropriate to allow the shoulder 121 to contact the door frame and the blocking face 134 to contact the door leaf. To install the security device 100, the door is opened and the locking section 1 16 inserted through the gap. The blocking face 134 is positioned adjacent the door leaf and the door closed to bring the shoulder 121 into contact with the door frame. The barrier 112 is then extended and locked as described above. The door leaf is thus prevented from opening by the door block 130, which is retained in position by the rest of the security device 100. This configuration is equally applicable to double hinged doors which can be opened either inwardly or outwardly.

It will be noted that the door block 130 must be positioned against the door leaf near to the leading edge of the door leaf (i.e. the edge opposite the hinged side). The door block 130 could be fitted to either the first or second locking sections 118, 120, however it is preferred that it is coupled to the second locking section 120, since it is reinforced with the shoulder 121 and reinforced region 125. Thus, the security device in Figure 5 is configured for a door assembly which is hinged on the right hand side as would be viewed by a user on the barrier side of the door installing the device. In order to configure the security device for an opposite hinged door, the first and second locking sections 114, 1 16 are simple swapped and rotated through 180°. Since the second end portion 115 is identical to the second engaging portion 120, there is no loss in strength or functionality of the reversed configuration.

The security device 100 is simple to produce, requiring few unique parts, and is quick to install to a door in emergency situations. For outwardly hinged doors, it is noted that the fasteners 123B are exposed to the exterior side of the door, and thus accessible to attackers. This can be mitigated by using anti-tamper fasteners such as locking nuts which engage only with a key or special adaptor, and/or by allowing the shaft of the fastener to freely rotate, thereby causing the whole fastener to rotate rather than the nut. In emergency situations it is unlikely that an attacker would be carrying the necessary tools, and in any case, the delaying function of the security device is still beneficial.

Various embodiments of the invention have been described, and modifications, omissions and/or combinations of features are contemplated and fall within the scope of the invention. Further, features of different embodiments may be combined, and the separation of the features into different embodiments does not teach that such combination is not possible.