AU627593B2 - Window or door security device - Google Patents

Description

PATENTS ACT 1952 COMPLETE SPECIFICATION

(ORIGINAL)

FOR OFFICE USE: 627593 Application Number: Lodged: Class Int. Class *Complete Specification Lodged: Accepted: Published: Priority: Rcia~t~d Art: Name of Applicant(s): A 4ldrl of Applicant(s): r1 0 :A ALLEN JAMES STACEY 3 Forrest Street

PINJARRA

Western Australia AUSTRALI A 4 Actual biventor(s): APPLI CANT 44.

'4 44 0 P~ 004247 190690 Address for Service: I cza. Kelvin Lord Co., 4 Douro Place, WEST PERTH, Western Australia 6005.

Complete Specification for the invention entitled: "WINDOW OR DOOR SECURITY DEVICE" The following statement is a full description of this invention, including the best method of performing it known to me/ us 4l I I I (I l t I II i

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I C t I CC I I 1I I (14111 2 The present invention relates to a security device for a slidable panel particularly envisaged for use with sliding windows or doors.

Typically, known window and/or door security devices comprise a length of rod, laid horizontally in the lower track of a window or door frame. One end of the rod behrs against the sliding window or door and the other bears against the frame. Such devices are only used to hold the window or door in a fully closed position and cannot hold the window or door open in an intermediate position.

In accordance with one aspect of the present invention there is provided a security device for a slidable panel comprising at least one bolt means attached to said slidable panel and movable from an unlocked position to a locked position in which an end of said bolt means bears on a frame having said slidable panel located therein to clamp said slidable panel relative to said frame.

The present invention will now be described, by way of example, with reference to the accompanying drawings, in 20 which: Figure 1 is a side view of one embodiment of a security device in accordance with the present invention shown mounted on a sliding window and in a locked position; Figure 2 is a front view of the security device of Figure 1; Figure 3 is a side view of the security device of Figure 1 shown in an unlocked position; Figure 4 is a front view of the security device of Figure L i. i ;.i 01 3 3; Figure 5 is an upper perspective view of a locking block and handle combination of the security device of Figures 1 to 4; Figure 6 is an upper perspective view of the locking block of Figure 5 having the handle removed; Figure 7 is an upper perspective view of the handle of Figure 5 having been removed from the locking block; Figure 8 is a further upper perspective view of the handle o 0 10 of Figure 7; SoFigure 9 is an exploded view of a single cam follower and 00 goo bolt combination of the security device of Figures 1 to 4 o os shown in position over a length of track; Figure 10 is an upper perspective view of a sliding window having the security device of the present invention mounted °oo thereon; Figure 11 is a side view of a second embodiment of a o0:oo security device in accordance with the present invention shown mounted on a sliding window and in a locked position; i oooo 20 Figure 12 is a front view of the security device of Figure ooo.oa 11; Figure 13 is a side view of the security device of Figure 11 shown in an unlocked position; Figure 14 is a front view of the security device of Figure 13; and Figure 15 is an upper perspective view of a locking block and handle combination incorporating a barrel lock in accordance with a third embodiment of the present i i 1 1141 tre I r t 4 4 4 114 t It 4 4.

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In Figures 1 to 4 there is shown a security device mounted on a sliding window 12 in a window frame 14. The window frame 14 comprises an upper track 16 and a lower track 18.

Each track 16 and 18 has a base member 20 and two perpendicularly dependent side members 22. The sliding window 12 slides within the confines of the side members 22 and on the base member 20 of the lower track 18.

10 The base member 20 of each track 16 and 18 has a toothed portion 24 projecting therefrom between the side members 22.

The sliding window 12 has a frame 23 holding a window pane The security device 10 comprises a locking block 26 (shown in phantom), a handle 28 and two bolts The bolts 30 have attached thereto a cam follower 32. The cam followers 32 connect the bolts 30 to the handle 28.

In Figure 9 there is shown an exploded view of a cam 20 follower 32 and a bolt 30 together with the toothed portion i 24 of a track 16 or 18.

The cam fol.lower 32 comprises a body 34 and an attachment plate 36. The attachment plate 36 extends from the body 34 C and has two apertures 38 extending through its thickness.

The body 34 has a substantially planar surface 40 having a pin 42 extending therefrom.

The attachment plate 36 has a toothed surface 44 thereon.

A further toothed surface 46 is provided on the bolt The toothed surface 46 is complementary to the toothed surface 44 to provide an interlocking action when the bolt and cam follower 32 are brought together. In addition, the bolt 30 has recesses 48 therein for receiving attachment means 49. The attachment means 49 extend through the attachment plate 36 into the recesses 48 of the bolt 30 in normal use.

Each bolt 30 has a first end 50 and a second end 52. The cam follower 32 is attached to the bolt 30 substantially near its first end 50. The second end 52 is provided with a number of teeth 54.

The toothed portion 24 of the tracks 16 and 18 are in turn provided with teeth 56.

The locking block 26 comprises a pair of sides 58 and a rear wall 60, as is best seen in Figure 6. In addition, a pair of flanges 62 is provided extending from the rear wall The flanges are provided with apertures 64.

A roof member 66 and a bottom member 68 are provided connecting the side 58 and the rear wall 20 One side 58 has a cut-away portion 70. An aperture 72 is i located in each side 58. The apertures 72 in sides 58 are 4: t substantially opposed to each other. The side 58 not having the cut-away portion 70 has a lug-aperture 74 and an arcuate aperture 76 extending therefrom.

The arcuate aperture 76 describes an arc around the aperture 72 over approximately 900.

The locking block 26 is designed to enable it to accept the handle 28 as shown in Figure 5. An axis member 78 is used

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4L 6to hold the handle 28 in position. The axis member 78 passes from the aperture 72 on one side 58 to the opposed aperture 72 on the other side 58.

The axis member 78 provides a point of rotation for the handle 28 within the locking block 26.

The handle 28 comprises a face plate 80 and a flange 82 extending therefrom at substantially 900, as can be best seen in Figures 7 and 8.

The flange 82 has a semicircular extension 84 extending therefrom. The semicircular extension 84 provides a smooth surface 86 to reduce friction when the handle 28 is rotated (to be detailed hereafter).

An aperture 88 is provided in the flange 82. The aperture 88 is positioned substantially in the centre of a circle described by the semicircular extension 84.

Furthermore, two arcuate apertures 90 are provided on opposite sides of the aperture 88. The arcuate apertures each have a first end 92 and a second end 94.

The first end 92 of each arcuate aperture 90 is positioned closer to the aperture 88 than the second end 94.

A button 96 is located in the face plate 80 and extends therethrough. The button 96 is provided with a lug 98 protruding therefrom. The lug 98 projects through a lug aperture 100.

The button 96 essentially has two positions, fully out as shown in Figures 1,5,7,8 and 11 and fully in as seen in Figures 3 and 13. The button 96 is biased in the fully out position by a spring (not shown).

,r.l L 7 The security device 10 is assembled such that the pins 42 of the cam followers 32 project through the arcuate apertures 90 of the handle.

The security device 10 has two states being locked, as shown in Figures 1,2,11 and 12, and unlocked, as shown in Figures 3,4,13 and 14.

In the locked position the pins 42 project through the second end 94 of the arcuate aperture 90, as can be seen in Figures 1 and 11. Furthermore, the teeth 54 of the bolts 30 interlock with the teeth 56 of the toothed portion, also shown in Figures 1 and 11.

In addition, the lug 98 of the button 96 projects into the lug aperture 74 of the locking block 26 when in the unlocked position, as shown in Figures 1 and 11.

However, in the unlocked position the pins 42 project through the first end 92 of the arcuate aperture 90, as can be seen in Figures 3 and 13. Furthermore, the teeth 54 of the bolts 30 do not interlock with the teeth 56 of the toothed portion, again shown in Figures 3 and 13.

The lug 98 projects into the arcuate aperture 76 when ini the unlocked position as shown in Figures 3 and 13.

In Figure 10 there is shown the security device 10 of the present invention mounted on the sliding window 12. The sliding window additionally comprises a fixed window 102 within the window frame 14. The security device 10 is attached to the frame 23 of the window pane In Figures 11 to 14 there is shown a second embodiment of the present invention, like numerals denote like parts.

;;i i-J 8 The embodiment of Figures 11 to 14 allows for the incorporation of circuitry into the security device 10 to operate any one of a number of means for alerting others of attempted unauthorised entry.

The bolts 30 have located substantially in their second end 52 a longitudinal slot 104, as can be seen in Figures 12 and 14.

The longitudinal slot 104 has located therein a pair of opposed electrical contacts 106.

A wire 108 is provided for each electrical contact 106.

The wires 108 run from the electrical contacts 106 at the second end of the bolts 30 to the cam follower 32 at the first end 50. This situation is best seen in Figures 11 and 13.

The wires 108 pass through the cam follower 32 and may then be connected to an alarm system (not shown).

The button 96 has located thereon a first electrical contact 110 opposed to a second electrical contact 112.

The second electrical contact 112 is mounted on the flange 82 of the handle 28.

In Figure 15 there is shown a locking block 26 and handle 28 combination in accordance with a third embodiment of the present invention.

The handle 28 has inserted through the face plate 80 a barrel lock 114. The barrel lock 114 comprises a barrel 116, a key hole 118 and a locking plate 120. The locking plate 120 is substantially circular but has two opposed straight edges 122, of 'which only one is shown in Figure and two opposed curved edges 124.

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:1 I 9 The locking block 26 has an opposed recess 126 located in each side 58. The recesses 124 are positioned so as to receive the curved edges 124 of the locking plate 120.

In use, the security device 10 is mounted on the sliding window 12 through apertures 64 provided in flange 62.

To lock the security device 10 the handle 28 is moved into the position shown in Figures 1,2,11 and 12.

In this position the pins 42 of the cam followers 32 project into the second end 94 of the arcuate apertures 90. As such, the pins 42 are forced away from the axis member 78. In turn, the bolts 30 are forced to abut the upper and lower tracks 16 and 18 respectively.

The teeth 54 at the second end 52 of each bolt 30 engage the teeth 56 of the toothed portions 24.

It is not possible to lift or slide the sliding window 12 when the security device 10 is in this position. Lifting is prrvented as the bolts 30 are pressed firmly against the toothed portion 24 of the tracks 16 and 18. Sliding is prevented as the teeth 54 of the bolt 30 are engaged with 20 the teeth 56 of the toothed portions 24. Unauthorised entry from the outside is therefor prevented.

To unlock the sliding window 12 the handle 28 needs to be rotated to the position shown in Figures 3,4,13 and 14. A user (not shown) may grip the handle 28 by the face plate 80. This is possible due to the cut-away portion 70 of one side 58 as shown in Figure The button 96 must also be depressed at the same time.

This action moves the lug 98 from the lug aperture 74 of

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'4 i _il. i- 1. 10 the locking block 26. The handle 28 may then be raised.

As the handle 28 is raised it rotates about the pin 78 passing through the flange 82. The lug 98 of the button 96 moves within the arcuate aperture 76 as the button 96 is depressed.

in turn, the pins 42 of the cam followers 32 move to the first ends 92 of the arcuate apertures 90. The first ends 92 of the arcuate apertures are closer to the axis member 78. As a result, the cam followers 32 are caused to move towards each other. This action causes the bolts 30 to be drawn away from the tracks 16 and 18.

As the bolts 30 are drawn away from the tracks 16 and 18 the teeth 54 disengage with the teeth 56 of the raised portion 24.

It is now possible to slide the sliding window 12 without any interaction between the bolts 30 and the toothed portions 24.

When the handle 28 is lowered the sliding window 12 will again be locked. i The second embodiment of the present invention is depicted in Figures 11 to 14. The operation of the second i embodiment is essentially the same as the first but has a number of additional features.

If, when the security device 10 is in a locked position shown in Figures 11 and 12, someone attempts to slide the sliding window 12 the electrical contacts 106 in the longitudinal slot 104 will be pressed together. The joining of the electrical contacts 106 with allows a iirr circuit, consisting partially of wires 108, to be completed causing an alarm (not shown) to be activated.

To allow authorised opening of the sliding window 12 the depression of the button 96 causes the first contact 110 to contact the sccond electrical contact 112. This completes a circuit (not shown) leading to the alarm that causes the alarm not to activate. This ensures that as long as the 4 button 96 is depressed the sliding window 12 may be pushed, even with the teeth 54 and 56 engaged, without the alarm being activated.

A third embodiment of the present invention is shown in Figure 15. The operation of the third embodiment is the same as either or both of the first two embodiments but is provided with one additional feature.

The security device 10 has a barrel lock 114 that can prevent the handle 28 being raised thereby preventing still further the sliding window 12 being opened.

When locked the curved edges 124 of the locking plate 120 extend into the recesses 126 of the locking block 26. This prevents the handle 28 being rotated about the axis member 78. A key (not shown) is required to unlock the barrel 4 lock 114 and is received in key hole 118. When unlocked the curved edges 124 of the locking plate 120 are rotated out of the recesses 126. The straight edges 122 of the locking plate 120 now lie adjacent the recesses 126. The handle 28 may now be raised to unlock the sliding window 12 in the manner previously discussed.

It should be noted that the sliding window 12 is able to be 12 12 locked not only in a closed position but also in a partially or fully open position. This is an advantage when it is desired to have the window open slightly but still want to prevent unauthorised entry through that window.

The security device 10 may be constructed from a number of building materials, in particular aluminium or stainless steel.

It is not necessary that the wires 108 pass along the length of the bolts 30. It is envisaged that they may k leave the bolts 30 directly from the longitudinal slots 104.

Modifications and variations such as would be apparent to a skilled addressee are deemed within the scope of the present invention.

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Claims (12)

1. A security device for a slidable panel comprising at least one bolt means attached to said slidable panel and moveable from an unlocked position to a locked position in which an end of said bolt means bears on a frame having said slidable panel located therein to clamp said slidable panel relative to said frame, said end of said bolt means and said frame being provided with means for positive engagement, a further end of said bolt means is attached to a locking block and handle combination, said locking block comprising at least two walls defining a recess to accept said handle and an axis member around which said handle is ft rotatably held between said walls, said bolt means having a cam follower adapted to engage said handle attached at said tf 15 further end thereof, said cam follower further having a pin means extending therefrom, said pin means being retained in an aperture in said handle whereby movement in said handle is transferred directly to said cam follower and in turn to 4said bolt means. sad apertreainsai adeweeymveeti adhnl

2. A security device according to claim 1, wherein said oft. t.44 means for positive engagement comprises a number of teeth S 5* .provided on said end of said bolt means and on said frame, said teeth on said end of said bolt means being complementary to those on said frame.

3. A security device according to claim 1 or 2, further comprising aperture means in one said wall of said locking block to accept lug means extending from said handle, said handle comprising an aperture to accept said axis member and button means having said lug means extending therefrom, 'I 14 said lug means projecting into said aperture means in said wall of said locking block.

4. A security device according to any one of claims 1 to wherein said aperture to accept said pin means is. arcuate and has a first end and a second end, said first end being nearer the said axis member around which said handle rotates than the second end. A security device according to claim 4, wherein rotation of said handle within said locking block causes said pin means to move from said second end to said first end of said aperture in said handle thereby releasing said bolt means from engagement with said frame by drawing said cam follower and in turn said bolt means towards said axis member.

6. A security device according to any one of claims 3 to wherein said aperture means provided in said wall to accept said lug means on said button has two portions, an arcuate portion and a restrictive portion, whereby when said button means is not depressed the lug means is within 20 the restrictive portion and the handle cannot be rotated t i and when said button is depressed said lug means moves into said arcuate portion allowing said handle to be rotated.

7. A security device according to any one of the preceding claims, further comprising a longitudinal slot in said bolt means having a pair of opposed electrical contacts mounted therein such that when an attempt is made to slide said slidable panel when said bolt means and frame are positively engaged said electrical contacts meet to complete an electric circuit. Fl i -I

8. A security device according to claim 7, in which said electric circuit is connected to and causes the activation of an alarm system. i A security device according to any one of claims 3 to 8, further comprising a second pair of opposed electrical contacts the first mounted on said handle and the second mounted on said button means whereby the depression of said button causes the contacts to meet to complete an electric circuit.

10. A security device according to claim 9, in which said electrical contacts are connected to an alarm system such that when said contacts meet said alarm system is ,deactivated.

11. A security device according to any one of claims 3 to tI 10, further comprising a barrel lock mounted in said handle and at least one recess in said wall of said locking block.

12. A security device according to claim 11, wherein said barrel lock has mounted thereon a rotatable plate allowing movement between engaged and unengaged positions with said 20 recess, said plate having at least one curved portion for .engagement with said recess thereby not allowing said o i 4 handle to rotate about said axis member and having at least one straight portion that allows rotation of said handle by L not engaging said recess.

13. ,A security device substantially as hereinbefore described with reference to Figures 1 to 10 of the accompanying drawings.

14. A security device substantially as hereinbefore /-iT described with reference to Figures 5 to 14 of the and handle combination incorporating a barrel lock in accordance with a third embodiment of the present I: i I I 16 accompanying drawings. A security device substantially as hereinbefore described with reference to Figures 1 to 10 and 15, or Figures 5 to DATED MAY 27 1992 ALLEN JAMES STACEY By his Patent Attorneys KELVIN LORD AND COMPANY PERTH, WESTERN AUSTRALIA St S I Is 51( I as 5(5 I t1 I S ii 1