AU741422B2 - Security locking device - Google Patents

Description

i, AUSTRALIA PATENTS ACT 1990 COMPLETE SPECIFICATION FOR OFFICE USE Short Title: Int. Cl: Application Number: Lodged: Complete Specification-Lodged: Accepted: Lapsed: Published: Priority: Related Art: Name of Applicant: Address of Applicant: TO BE COMPLETED BY APPLICANT Peter earl Alexander Schmidt 57 Strata AvPanm'P. RPA4,PAP.9l HETIrC, W.U PI= Actual Inventor: AS ABOVE Address tor Service: ANDERSON-TAYLOR ASSOCIATES, Registered Patent Attorneys of 10 Harrison Avenue BONNET BAY N.S.W. 2226 Complete Specification for the invention entitled: SECURITY LOCKING DEVICE The following statement is a full description of this invention, including the best method of performing it known to me: locking position and a vertical unlocked position clear of said door wherein said first and second head portions have threaded shanks which screw into sleeves, said sleeves being adapted to turn into apertures formed in said first and second fixed structures.

Preferably the channel is fitted with a detent ball to releasibly hold the cross-bar therein.

Two currently preferred embodiments of this invention will now be described with reference to the drawings in which: Figure 1 Figure 2 Figure 3 is a schematic diagram of one form of apparatus according to this concept which is adapted for installation on the door of a domestic dwelling, shows a second embodiment of the invention, is a schematic perspective view of a door fitted with a third embodiment of this invention, is a detailed view of the anchor fittings used with the apparatus of figure 3, and is a schematic perspective view of the door of figure 3 but with the apparatus in the unlocked position, Figure 4 Figure 5 Referring first to figure 1 there is shown a set of crossbars 1, 2 in the horizontal locking position across a door.

This invention relates to security apparatus. More particularly although not exclusively it discloses an improved door locking device.

While there are a large number of security devices currently available for entry doors these typically are limited to locks which operate on the latch bolt or strike. Such devices are of limited value as the protection obtained is no better than the unsupported strength of the door structure. Many modern doors are of relatively light construction and forced entry can often be obtained simply by breaking the frame of S- the door so that it separates from the latch or hinges.

It is therefore an object of this invention to ameliorate the aforementioned disadvantages and accordingly a security apparatus for a door is disclosed, said apparatus including at least one cross-bar and first and second anchor members, said cross-bar in a transverse locking position of use being disposed across a width of said door to block opening thereof and extending from a first head portion of said first anchor member in a first fixed structure at one side of said door to a second head portion of said second anchor member in a second fixed structure at the other side of said door and said second head portion being formed with a channel into which one end of said cross-bar is releasibly fitted at said transverse locking position and the first head portion being pivotally connected to the opposite end of said cross-bar so that said cross-bar can be pivoted between said transverse These bars at their outer ends are hingedly attached to anchor lugs 3, 4. The anchor lugs are fitted with pivot pins 3A, 4A and include threaded shanks 3B, 4B which are adapted to turn into the structure of the building to each side of the door frame. While with this particular embodiment of the invention it is envisaged that the anchors would turn into a timber structure, other anchor devices for use in masonry for example may also be used. The cross-bar support 5 is located in this case at the centre of the door midway between the anchors 3, 4. When fitted to a conventional wooden door the support 5 may comprise a head 5A which protrudes out from the inner surface of the door and a threaded shank 5B which extends through to engage within a sleeve 5C attached to a backing plate 5D. Preferably this plate has barbs 5E which dig into the outside of the door and prevent the plate from rotating as the shaft is turned into the sleeve 5C. The right hand cross-bar 2 as shown preferably includes a sliding bolt 2A which for locking can be moved across to seat into a longitudinal bore 1A in the left hand bar 1. The head 5A of the bar support in this case comprises a central aperture through which the bolt passes as well as cradles 5G on each side in which the bars rest. The remainder of the apparatus comprises a pair of holders 6, 7 which are located on each side of the door frame directly above the anchor lugs 3, 4.

To unlock the door the bolt 2A is withdrawn and the bars are tilted upwardly about the pivot pins 3A, 4A from the horizontal positions shown. Upon reaching a vertical position extending up from the anchors 3, 4 and parallel to the door -4frame they may be set into these holders 6, 7 using any suitable type of catch mechanism. In this manner the bars are held well clear of the door until they are again required for locking purposes.

A second form of the invention is shown in figure 2. Here two independent cross-bars 8, 9 may be fitted across opposite sides of the door. The outer ends of the bars are hinged to respective anchor lugs 10, 11 which are fixed to the building ooo structure on each side of the door frame. There are also bar supports 12, 13 in the door adjacent each side which are fixed in place using backing plates 14, 15 similar in design to those of the first embodiment. The bars include bolts 8A, S'.9A which upon locking the door slide out to engage in" apertures 12A, 13A in the bar supports 12, 13. When unlocked the bars pivot downwardly on the anchor lugs to hang clear of the door.

With the third embodiment of the invention shown in figures 3 to 5 there is a single cross-bar 16 which in the locking position extends completely across the width of an inwardly opening door 17. The right side 18 of the cross-bar threadably engages into an aperture 19 in an anchor lug (best shown in figure The opposite left end 21 of the bar is cradled in a channel 22 of a second anchor lug 23. The left end 21 of the bar is a relatively close tolerance push fit into this channel 22 and is releasably held in place by a spring loaded detent ball 24.

As best shown in figure 4 the anchor lugs 20 and 23 are each of two piece construction. The heads in each case include threaded shanks 24, 25 which engage into sleeves 26, 27.

These sleeves in turn have external threads 28, 29 which-are adapted to turn into apertures drilled into the wall structure 30 on each side of the door. While the shape and configuration of the sleeves shown is for turning into a wooden structure they may equally be adapted for use in masonry, brick or steel structures. The sleeves are also preferably formed with transverse slots 31, 32 across the outer ends to enable a tool to be fitted for the turning operation.

To install the apparatus the sleeves 26 and 27 are both screwed tightly into apertures in the support frame so that the outer ends are flush with the frame surface. The left anchor 23 is then turned tightly into its sleeve 26 and orientated so that the channel 22 faces upwardly as shown.

The right anchor lug 20 is also screwed substantially into the sleeve but with enough free play left to enable it to be turned through 90 degrees as discussed later.

Adhesive may also be applied to the outer threads of the sleeve before installation to increase the holding strength of the anchor lugs.

The threaded shanks and sleeves can for example be M-12 or any other nominated size.

-6- The threaded end 18 of the cross-bar 16 is then threaded into the aperture 19 as described earlier to complete the installation.

Preferably as shown in figure 3 the anchor lug 20 is located adjacent the inwardly opening side 33 of the door for maximum locking strength.

In use of the apparatus the cross-bar 16 and right anchor lug .o are rotated between the locked position shown in figure 3 where the bar extends across and blocks the inward opening of oooo the door and the unlocked position of figure 5. In the latter position the bar extends vertically downward and its free end 21 is held clear of the door by engagement with any suitable S.form of spring clamp 34.

[.It will thus be appreciated that this invention at least in the form of the examples disclosed provides a novel and improved security apparatus which as well as locking the door reinforces and braces the structure across its width against forced entry. Clearly however the embodiments described are only the currently preferred forms of the invention and a wide variety of modifications may be made which would be apparent to a person skilled in the art. For example the number and position of the cross-bars fitted, and the shape and configuration of the anchor lugs and bar supports may all be changed according to application or design preference.

Also, while the embodiments are preferably constructed of high strength steel the invention extends to the use of other suitable materials.

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Claims (8)

1. A security apparatus for a door, said apparatus including at least one cross-bar and first and second anchor members, said cross-bar in a transverse locking position of use being disposed across a width of said door to block opening thereof and extending from a first head portion of said first anchor member in a first fixed structure at one side of said door to a second head portion of said second anchor member in a second fixed structure at the other side of said door and said second head portion being formed with a channel into which one end of said cross-bar is releasibly fitted at said transverse locking position and the first head portion being pivotally connected to the opposite end of said cross-bar so that said cross-bar can be pivoted between said transverse locking position and a vertical unlocked position clear of said door wherein said first and second head portions have threaded shanks which screw into sleeves, said sleeves being adapted to turn into apertures formed in said first and second fixed structures.

2. The security apparatus as claimed in claim 1 wherein the channel formed in said second anchor means is fitted with a detent ball to releasibly hold the bar therein.

3. The security apparatus as claimed in claim 2 wherein said sleeves are formed with transverse slots across the outer isnds thereof to enable a tool to be fitted for turning said screws into said structures.

4. The security apparatus as claimed in claim 3 wherein said second anchor means when in a position of use is orientated so that said channel faces upwardly.

The security apparatus as claimed in claim 4 wherein the head portion of said first anchor means when in a position of use is rotatable with respect to one of said sleeves.

6. The security apparatus as claimed in claim 5 wherein said first anchor means when in a position of use is located adjacent the inward opening edge of said door.

7. The security apparatus as claimed in claim 6 and further including a spring clip which in a position of use is secured to said first structure below said first anchor means, said spring clip being adapted to releasibly hold said cross-bar when in said vertical unlocked position.

8. A security apparatus for a door, said apparatus being substantially as described herein with reference to figure 1i, 2 or 3 or figures 3 to Dated this 12th day of October, 2001 Peter Earl Alexander Schmidt By His Patent Attorney MICHAEL ANDERSON-TAYLOR