AU683866B2 - Security system - Google Patents

Description

Regulation 3.2 -1-

AUSTRALIA

Patents Act 1990 CODdLFT-jEM3E S=1'3C IF X CALME IOW S TNA? .ME:1qr-r

APPLICANT:

NUMBER:

FILING DATE: ALAN HARVEY LATTA GREGORY IAN ROWLAND PL 8108/93 1/ 4/93 Invention Title: SECURITY SYSTEM The following statement is a full description of this invention, including the best method of performing it known to me/us:

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2 This invention relates to a security system and in particular to a grille or mesh which is adapted to be located relative to a window or other aperture to prevent access therethrough.

There have previously been proposed many forms of bars and grilles and meshes to be used in association with windows and in general these take the form of a frame to which the grille is fitted which is in turn incorporated into the periphery of an aperture which is normally a window.

^i Such grilles or bars are a good deterrent as far as access through the window is concerned however they have major S. disadvantages.

Where such bars or grilles are permanently fixed even authorised access is impossible when desired, as for example with floor to ceiling windows, and in addition access to the windows for maintenance or cleaning is severely limited. There is also the

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problem that the interior of a room whose windows are barred is less attractive than it would otherwise be.

The major problem however relates to safety as in the event of some dangerous occurrence, such as fire, permanently barred windows cut off the most obvious avenues of escape.

There have been proposed certain systems having removable bars in order to overcome the disadvantages relating to access howevsn NP51\3PNC\LATA.SPC\30 March, 1994 j, i- i ii presented problems associated with manipulating a large number of heavy bars which must be held in place with some form of relatively complex inter-engaging lock mechanism. These systems also although technically not permanent fixtures in a window frame, are still cumbersome to remove in the event of an emergency.

The object of the present invention is to provide a security system having a removable frame which includes a mesh or grille and which minimises or overcomes the disadvantages of previous systems.

The invention in its broadest sense comprises a security system including a security grille or the like, adapted to be fitted in a window jamb or other aperture, having a frame in the shape of the aperture and in which frame is fixed a rigid mesh or grille :work or other obstructive means; connector means at the upper end of said grille to removably engage with fixed receptors located o. on the upper inner sides of the aperture which receptors act as pivots thus providing a hinging action, the connector means associated with the frame and having a mouth into which a receptor can enter and a passage having a width to receive a receptor, the arrangement being such that the grille can rotate about the receptors and wherein at an extreme of rotational S movement of the grille, the grille can be moved so that the receptors are aligned with the mouth and the grille removed from e connection with the receptors and thus from the aperture, and means to retain the grille in position when it occludes the aperture.

AUgSt, 1997 It is preferred that there are two receptors, one on each side of the window frame and internally of a window therein and it is also preferred that there are two locking devices, one on each side of the frame near the bottom thereof.

In order that the invention may be more readily understood the preferred embodiment will be described with reference to the following drawings, in which: Fig.l is a diagrammatic representation of the security system situated in a window frame.

Fig.2 is a vertical cross-section showing the side edge of the security system when situated in a window frame.

Fig.3 shows an end on view of the curved portion of the top ends of the security system frame located over a supporting bolt.

Fig.4 shows a cross-section through a supporting bolt and the curved end fitting on the grille frame.

shows a diagrammatic representation of the curved fitting on the top left hand side of the grille frame as well as the associated bolt fitting attached to a window frame.

Fig.6 shows a cross-section through the left hand lower bolt keyed into position in its receptor.

Fig.7 shows the bolt and receptor of Fig.6 separately.

WP51\SPEC\LATTA.SPC\3O Harch, 1994

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In the preferred embodiment the security system consists of a metal frame (10) encompassing a metal grille (11) (Fig.l) which is removably hinged at the top left and right hand sides to a window frame (12) and locked with a key mechanism (13) to the window frame at the bottom left and right hand sides.

Fig.2 shows the cross-section 2-2 of Fig.l which shows the edge of the security frame (20) with its curved end fitting (21) positioned over the support bolt The end fitting (21) is shown more clearly in Fig.5 as is the bolt (22) mounted on a metal plate (23) affixed to the window frame with screws (24).

The end fitting (21) is shown in Fig.3 in cross-section when fitted over bolt The bolt penetrates the fitting (21) to a maximum depth of the interior wall of the fitting (23) and with two bolts and fittings, allows the security frame to pivot about them.

Fig.6 and Fig.7 show that at the security frame's lower edges moveable bolts (35) with end pieces (30) can be locked into a receptor (32) in the window frame (12) which receptor has a base plate (33) fixed to the window frame with screws The locking mechanism is keyed (31) so that when the lower bolts are locked in the receptors and the key removed the position of the security frame in the window aperture is such that it covers both the upper and lower fittings on the window frame thereby NP51ISPZC\LATTA.SPC\30 March, 1994 I- rr rr R preventing access to the screws (34,24).

Instead of a simple grille, as illustrated, we may provide in the frame some other form of obstructive device such as bars, mesh or metal in a decorative form.

It is preferred that the total weight is such that the device can be easily locked into a window aperture and as easily be removed from that aperture when not required or when emergency access is needed.

It may be preferred in some applications, such as when the window frame is mounted in a brick or masonry building, that the rod fittings used take the form of rods attached to screws which 4* penetrate through the window frame and into the adjacent wall.

In another embodiment of the invention the removable security frame is suspended by rods protruding from its top left and right hand sides which slot into adjacent fittings attached to the top left and right interior faces of the window frame. Once in position the security frame obscures the screws which secure the fittings to the window frame. The removable security frame is then locked into position in the window aperture by keyed locks on its lower left and right faces as in the preferred embodiment.

The upper, lower and side members constituting the frame of the HP51\8PEC\LATJA.SPC\30 March, 1994 7 security system can be square or rectangular in cross section and could be of steel or a metal extrusion such as aluminium.

The metal used for both the security system frame and the grille or mesh will depend on the degree of security required and is not, in itself, critical to the invention.

In both embodiments the security frame is completely independent of the window frame and in the preferred embodiment is supported .0 in the window aperture on two rod type protrusions extending from the top left and right sides of the window frame, these rods slotting into two receptors on the upper inside and rear edges of the security frame.

The rods are attached to rectangular metal fittings attached to the window frame with screws. The security frame has curved endings on its top left and right hand sides which are cut away at the sides and at the rear to form receptors for the bolts.

Thus the security frame can be hooked over the bolts so that it is hinged in the window cavity when the frame is unlocked.

In both embodiments the upper edges of the removable frame are pivotally fixed to the window frame and in order to secure the security frame rigidly in the window aperture its lower left and right hand sides are fitted with a simple locking mechanism.

The receptors for the bolts in the locking mechanisms consist of HPS1\PEC\IATTA.SPC\30 March, 1994 -S0 To L metal extrusions screwed to the lower inside faces of the window frame and having a centrally located hole into which the bolt is placed prior to locking.

When the security frame is locked in position in the window aperture the keys used to perform the locking operation can be removed. The security frame in this position covers the receptors in the window frame and in particular covers the screws attaching them to the window frame. The frame is also prevented by the 9* locking bolts from moving vertically upwards to leave the rod receptors. There is then no simple way of removing the security S* frame other than by destroying the window frame.

9 There is also no restriction on the size or shape of the bars, mesh, grille or decorative metal work, the only constraint being the degree of security required which will in turn constrain the strength of the materials used and hence their size and metal type.

The exact type of locking device is not material to this invention except that it must have a key mechanism which allows removal of the keys. Neither is the exact form of the fitting from which the removable frame is suspended material to the invention except in as much as the frame must be able to quickly slot in and out of such fittings.

1I\SPHC\LATTA.SPC\30 March, 1994

Claims (5)

1. 2. A security system as claimed in claim 1 wherein there is a connector means adjacent each side of the grille and wherein the mouth of each connector means is directed outwardly from the grille when it is occluding the aperture.
2. 3. A security system as claimed in claim 2 in which the grille is attachable to the aperture frame by at least one locking device. August, 1997
3. 4. A security system as claimed in any preceding claim in which locking devices are situated on either side of the security system frame, near the bottom thereof. A security system as claimed in claim 3 and claim 4 in which the locking device is a keyed lock which secures a bolt device which, prior to locking, is pushed through its frame into an adjacent bolt receptors located in a face plate in the aperture frame such that when locked in position the security system frame obscures any receptors on the aperture frame.
4. 6. A security system as claimed in any preceding claim in which the receptors are rods normal to the inside of the aperture frame.
5. 7. A security system substantially as hereinbefore described with reference to the accompanying drawings. DATED THIS 16th DAY OF July 1997 ALAN HARVEY LATTA -and- GREGORY IAN ROWLAND By Their Patent Attorneys S A. TATLOCK ASSOCIATES July, 1997 I 1 0 ABSTRACT An easily removable security system to be fitted in a window or other framed aperture. The security system consists of a metal frame (10) encompassing a metal grille (11) and is removably hinged at the top left and right hand sides to a window frame (12) and locked with a key mechanism (13) to the window frame at the bottom left and right hand sides. The security system has means on its frame (21) to fit easily over fixed receptors (22) adjacent the top of the frame which act as pivots allowing the security frame to be hinged when unlocked. *o o a o