GB2131866A

GB2131866A - Security fittings

Info

Publication number: GB2131866A
Application number: GB08332229A
Authority: GB
Inventors: Philip John Mawditt
Original assignee: Parkes & Sons Ltd Josiah
Current assignee: Parkes & Sons Ltd Josiah
Priority date: 1982-12-09
Filing date: 1983-12-02
Publication date: 1984-06-27
Also published as: GB8332229D0; GB2131866B

Abstract

A security fitting for hinged windows includes two rails 1 and 2 attached respectively to the opening window leaf 7 and to its fixed frame 8. A slide 3, normally retained on a portion of the rail 2 below the rail 1, can be slid up to embrace both rails when the window is closed, and clamped in place by a grub screw 15 with a socketed head engageable by a correctly configured key (16 Fig 2 not shown). <IMAGE>

Description

SPECIFICATION Security fittings The present invention relates to security fittings for locking together two relatively movable members.

Fittings in accordance with the invention are, in particular, useful for locking hinged windows to their frames in theirciosed condition, although embodi mentsoftheinvention may be found of equal utility in the securement of other relatively-movable members of like character.

According to the invention, a securityfitting for locking together two relatively-movable members comprises a pair of rails adapted to be attached to respective said members so that said rails can lie in parallel juxtaposition when said members are in the position to be locked togetherwhile extending trans versely to the direction of relative movement between said members; a slide adapted to be slid upon said rails, when in theirjuxtaposed condition, to a locking position in which the slide resists separation ofthe rails in said direction of relative movement; and key-releasable means associated with the slide for selectively retaining the slide in its said locking position upon the rails.

A preferred embodiment ofthe invention in the form of a window security fitting will now be more particularly described, by way of example, with reference to the accompanying drawings, in which: Figure 1 is an orthographic view of the fitting as installed on a casement window, in an unlocked condition; and Figure 2 is a plan view ofthe fitting of Figure 1, in the locked condition; Referring to the Figures, the illustrated fitting comprises two rails 1 and 2, and an associated slide 3.

The rail 1 is made from an extruded section of acute "L" form, having a base portion 4A and an integral inclined limb 5A. It is fixed, by three screws 6 passing through its base 4A, to the vertical rail 7 of a casement window leaf remote from the hinge line. The opening and closing movement of the window is indicated by the arrow A. The rail 2 is made from the same section as rail 1,with a base4B and limb 5B.It is mounted to the fixed window frame 8, bythree screws 9 passing through its base4B, in an inverted condition as compared with the rail 1 so thatthetwo limbs SAand 5B come together as shown in Figure 2 when the window is closed.Awedge-shaped packing piece loins optionally provided to ensure correct alignment of the rail 2 when fitted to a windowframe 8 with tapered sides.

The slide 3 is made from a generally U-shaped extrusion, with a base portion 11 and two limbs 12.

The slide limbs 12 are spaced and configured so as to interlock within the recesses 13 defined between the respective rail bases and limbs 4A, 5A and 4B, 5B, while the ends of rail limbs 5A, 5B can interlockwithin the recess 14 defined betweentheslide base and limbs 11,12, when the rails are brought together as in Figure 2. In this condition the member3 can slide longitudinally on the rails 1,2, the locking function being completed by clamping the slide in place while it embraces both rails.For this purpose a socketheaded grub screw 15 is threaded into the base ofthe slide 3 and, when the slide is slid into its locking position, the screw 15 is screwedin further by a key 16 having a bit 17 (Figure 2) to fit the socket in the screw.

The end ofthe screwthus bears against the rail limbs 5A, 5B to clamp the slidefirmlyto the rails.

With the fitting locked as described above the rails 1 and 2 are held together along the full length ofthe slide 3 and can thus offer high resistance to any attempt at prising open the window. The slide can be unclamped from the rails so as to be slid into the unlocking position, onlythrough use of an appropriately configured key. Furthermore, when locked the slide 3 conceals all the fixing screws 6 and 9 forthe rails 1 and 2, so that neither rail can be unscrewed to release the window.

Preferably, the slide 3 is not completely detached from both rails 1 and 2whenthefitting is unlocked.

The fixed rail 2 is therefore made longer than the moving rail 1 and formed at its bottom end with a stop so thatthe slide can hang on the rail 2 in the unlocked condition, ie as shown in Figure 1, ready to be slid up into engagementwith the other rail 1 when the window is closed and isto be locked. Such a stop may be formed simply by displacing part ofthe limb 5B at the bottom end of rail 2 to form an abutmentforthe slide screw 15. In practice the rail 2 has stops at both ends so that the fitting can be used in the same way on oppositely handed windows.

By virtue of its simplicity of construction the fitting exemplified herein is readily amenable to production at low cost. It is easy to install by the average householderwithoutthe need ofspecialisedtools or skills.Atthesametime,fittingsofthis kind can contribute significantly to security against burglarious entrythrough windows to which they are fitted.

1. Asecurityfittingfor lockingtogethertwo relatively-movable members, comprising a pair of rails adapted to be attached to respective said members so that said rails can lie in parallel juxtaposition when said members are in the position to be locked together while extending transverselyto the direction of relative movement between said members; a slide adapted to be slid upon said rails, when in theirsaidjuxtaposition condition, to a locking position in which the slide resists separation ofthe rails in said direction of relative movement; and key-releasable means associated with the slide for selectively retaining the slide in its said locking position upon the rails.

2. Afitting according to claim 1 wherein said rails and slide are configured with interengageableformations whereby when the slide is slid upon the juxtaposed rails itis blocked by said formations from movement relative to the rails in any direction other than along a single axis parallel to the rails.

3. Afitting according to claim 2 wherein, in use, said retaining means are effective to bear between the rails and slide such asto press said interengageable

**WARNING** end of DESC field may overlap start of CLMS **.

Claims

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Security fittings The present invention relates to security fittings for locking together two relatively movable members. Fittings in accordance with the invention are, in particular, useful for locking hinged windows to their frames in theirciosed condition, although embodi mentsoftheinvention may be found of equal utility in the securement of other relatively-movable members of like character. According to the invention, a securityfitting for locking together two relatively-movable members comprises a pair of rails adapted to be attached to respective said members so that said rails can lie in parallel juxtaposition when said members are in the position to be locked togetherwhile extending trans versely to the direction of relative movement between said members; a slide adapted to be slid upon said rails, when in theirjuxtaposed condition, to a locking position in which the slide resists separation ofthe rails in said direction of relative movement; and key-releasable means associated with the slide for selectively retaining the slide in its said locking position upon the rails. A preferred embodiment ofthe invention in the form of a window security fitting will now be more particularly described, by way of example, with reference to the accompanying drawings, in which: Figure 1 is an orthographic view of the fitting as installed on a casement window, in an unlocked condition; and Figure 2 is a plan view ofthe fitting of Figure 1, in the locked condition; Referring to the Figures, the illustrated fitting comprises two rails 1 and 2, and an associated slide 3. The rail 1 is made from an extruded section of acute "L" form, having a base portion 4A and an integral inclined limb 5A. It is fixed, by three screws 6 passing through its base 4A, to the vertical rail 7 of a casement window leaf remote from the hinge line. The opening and closing movement of the window is indicated by the arrow A. The rail 2 is made from the same section as rail 1,with a base4B and limb 5B.It is mounted to the fixed window frame 8, bythree screws 9 passing through its base4B, in an inverted condition as compared with the rail 1 so thatthetwo limbs SAand 5B come together as shown in Figure 2 when the window is closed.Awedge-shaped packing piece loins optionally provided to ensure correct alignment of the rail 2 when fitted to a windowframe 8 with tapered sides. The slide 3 is made from a generally U-shaped extrusion, with a base portion 11 and two limbs 12. The slide limbs 12 are spaced and configured so as to interlock within the recesses 13 defined between the respective rail bases and limbs 4A, 5A and 4B, 5B, while the ends of rail limbs 5A, 5B can interlockwithin the recess 14 defined betweentheslide base and limbs 11,12, when the rails are brought together as in Figure 2. In this condition the member3 can slide longitudinally on the rails 1,2, the locking function being completed by clamping the slide in place while it embraces both rails.For this purpose a socketheaded grub screw 15 is threaded into the base ofthe slide 3 and, when the slide is slid into its locking position, the screw 15 is screwedin further by a key 16 having a bit 17 (Figure 2) to fit the socket in the screw. The end ofthe screwthus bears against the rail limbs 5A, 5B to clamp the slidefirmlyto the rails. With the fitting locked as described above the rails 1 and 2 are held together along the full length ofthe slide 3 and can thus offer high resistance to any attempt at prising open the window. The slide can be unclamped from the rails so as to be slid into the unlocking position, onlythrough use of an appropriately configured key. Furthermore, when locked the slide 3 conceals all the fixing screws 6 and 9 forthe rails 1 and 2, so that neither rail can be unscrewed to release the window. Preferably, the slide 3 is not completely detached from both rails 1 and 2whenthefitting is unlocked. The fixed rail 2 is therefore made longer than the moving rail 1 and formed at its bottom end with a stop so thatthe slide can hang on the rail 2 in the unlocked condition, ie as shown in Figure 1, ready to be slid up into engagementwith the other rail 1 when the window is closed and isto be locked. Such a stop may be formed simply by displacing part ofthe limb 5B at the bottom end of rail 2 to form an abutmentforthe slide screw 15. In practice the rail 2 has stops at both ends so that the fitting can be used in the same way on oppositely handed windows. By virtue of its simplicity of construction the fitting exemplified herein is readily amenable to production at low cost. It is easy to install by the average householderwithoutthe need ofspecialisedtools or skills.Atthesametime,fittingsofthis kind can contribute significantly to security against burglarious entrythrough windows to which they are fitted. CLAIMS

3. Afitting according to claim 2 wherein, in use, said retaining means are effective to bear between the rails and slide such asto press said interengageable formationstightlytogetherand clamp the slide against movement along said axis.

4. Afitting according to claim 3 wherein said retaining means comprise an element screwthreadedly engaged in the slide and rotatable by operation of a correct key so as to extend from the slide to bear againstthejuxtaposed rails.

Neworamended claims:-5to7

5. Afitting according to any preceding claim wherein one of said rails is of greater effective length than the other said rail and is provided with stop means whereby, in use, the slide can be slid from its locking position to a position in which it is released from the other said rail but retained upon the one said rail byabutmentwith said stop means.

6. Afitting according to claims 4 and 5 wherein said stop means are arranged for abutment by said screwthreaded element when the latter is in a partially extended condition.

7. A secu rity fitting substantially as hereinbefore described with reference to the accompanying drawings.