AU627346B2

AU627346B2 - Locking device for sliding sash

Info

Publication number: AU627346B2
Application number: AU60988/90A
Authority: AU
Inventors: Michael Brian Alchin
Original assignee: Alchin and Long Group Pty Ltd
Current assignee: Alchin and Long Group Pty Ltd
Priority date: 1989-08-18
Filing date: 1990-08-14
Publication date: 1992-08-20
Anticipated expiration: 2010-08-14
Also published as: AU6098890A

Description

s I62734 S F Ref: 105171 FORM COMMONWEALTH OF AUSTRALIA PATENTS ACT 1952 COMPLETE SPECIFICATION

(ORIGINAL)

FOR OFFICE USE: Class Int. Class Application Number: PJ5832 Lodged: 18 August 1989 Accepted: Published: Priority: Reiated Art: Name and Address of Applicant: Alchin Long Group Pty Limited 97 Market Street S, Smithfield New South Wales 2164 S* AUSTRALIA Actual Inventor: Michael Brian Alchin Address for Service: Spruson Ferguson, Patent Attorneys, Level 33 St Martins Tower, 31 Market Street, Sydney, New South Wales, 2000, Australia j Complete Specification for the invention entitled: Locking Device for Sliding Sash The following statement is a full description of this invention, including the best method of performing it known to me/us 5815/ 016642 1408 0 5815/2 a ~ia~r .iU~O 2 -2- LOCKINGDEVICE FOR SLIDIN SASH Field_Qf the Invention This invention pertains to locking devices and more particularly to a locking device for a sliding sash.

Obijectof the Invention The object of the invention is to provide a locking device which is adaptable to sliding sash windows.

Summary of the Invention_ The locking device of the present invention comprises a handle-like body having a longitudinal bead which is adapted to be received by and pivotally engaged with a cooperating groove in a sliding sash. The handle includes a recess which is adapted to receive a lock cylinder. The locking S device also includes an elongated slot formed perpendicular to the recess.

OX:* The elongated slot is for receiving a sliding tang which is positionable .l:1 from an open position in which it is retracted within the locking device, to a closed position in which the tang is advanced so that a portion of it extends beyond the locking device. The tang is adapted to be advanced and retracted by a lock cylinder mounted in the recess.

Brief Descriptionof. the Drawings Fig. 1 is a perspective view of the locking device of the present invention with a lock cylinder mounted in the recess.

Fig. 2 is a cross section of the locking device of the present invention.

Fig. 3 is a cross section of the locking device of the present invention, also depicting a sliding sash and jamb which are interlocked by the device.

*Best Mode and_ Other Embodiments of the Present Invention As shown in Fig. 1, the locking device 10 of the present invention S comprises a handle-like body 11 which includes a projecting shelf-like grip portion 12. The grip portion 12 is supported along one edge by a generally concave face portion 13. Projecting from the face portion 13 an enlarged boss 14 is adapted to receive a lock cylinder 15. The rear underside of the body is characterised by an integral bead 16 which is attached to the body by a short rib 17. The longitudinal bead and rib extend at least partially and preferably the full length of the device so as to form a rhk/0193E i 3 portion of a pivot. The front portion 18 of the device is characterised by a tooth-like projection 19 which extends at least partially and preferably the length of the device. A stop 20 projects downward from the body of the device and is located between the bead and the tooth-like projection 19.

As shown in Fig. 2, the body of the device, which is preferably formed as a single integral unit, includes a bore or recess 21 which is roughly perpendiculr to the underside and adapted to receive a lock cylinder 15. An elongated slot 22 is formed below the recess 21. The axis of the slot 22 is perpendicular to the axis of the recess 21 so that the lock cylinder which is eventually installed in the recess 21 can activate a sliding tang 23 which is provided within the body 11. The sliding tang 23 is movable from an "open" position in which it is completely contained in *O the slot and therefore in the body of the device, to a second or locked position in which a portion of the tang extends beyond the rear face 24 of 11 the body of the device. It should be understood that any of a variety of lock cylinders may be utilised in conjunction with the locking device of the present invention so long as they can fit into the recess 21 and are capable of cooperating with the sliding tang 23 in the conventional fashion.

As shown in Fig. 3, the bead 16 is engageable with a cylindrical groove 27 which is formed in a sliding sash 28. The sash is adapted to retain a pane of glass 29. When the sash is closed, its forward portio.l abuts a chamfered edge 31 of an adjacent jamb 32. As the sash 28 is slid toward the jamb 32 the tooth 19 which projects from the locking device rides up and over the chamfered edge 31 of the jamb. As shown in Fig. 3, the flat rear portion 33 of the tooth 19 is kept by the chamfered edge 31, which prevents the sash from being opened. To re-open the sash, the lock cylinder 15 which is within the recess 21 is activated to retract the tang 23. When the tang 23 is retracted or in the "open" position, the locking device 10 can be rotated about the pivotal engagement 16, 27, in the direction of the arrow 34, thus disengaging the tooth 19 from the chamfered projection 31. When the tang 23 is advanced by the lock cylinder 15, it abuts an upright ledge 35 on the sash. This prevents the locking device from being rotated, thus prevents the tooth 19 from disengaging the chamfered edge 31. A resilient bias 36, such as a coil spring, may be interposed between the upright ledge 35 and the locking device 10, in rhk/0193E oi -4effect biasing the locking device 10 toward the closed position. The optional stop 20 abuts the marginal edge of the sash 28, for the purpose of preventing over-rotating the locking device toward the jamb.

Hhile the invention has been described with reference to particular materials and techniques of construction, it will be understood that these are provided by way of example and not as a limitation to the scope of the invention. In particular, the body 11 may be provided without the lock cylinder or tang, which items may be supplied by the user or subsequent seller.

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Claims

1. A locking device comprising: a handle-like body having .n underside from a rear portion of which projects a longitudinal bead, the bead extending at least partially the length of the body; the underside also having a forward portion from which extends a tooth-like projection; the body also having bore formed therein, the bore cooperating with a slot which projects through a rear face of the body.

2. The locking device of claim 1, wherein: the bore extends roughly perpendicular to the underside. S.

3. The locking device of either of claims I or 2, wherein: the slot has located therein, a sliding tang.

The locking device of claim 3, further comprising: a lock cylinder located within the bore and cooperating with the tang.

5. The locking device of any of claims 1-4, further comprising: a stop member projecting from the underside and located between the bead and the tooth-like projection.

6. The locking device of any of claims 1-5, wherein: the bead extends the ;11 length of the body.

7. The locking device of any of claims 1-6 wherein: the tooth-like projection extends the full length of the body.

8. A locking device substantially as hereinbefore described with reference to any of Figs 1 or 2 or 3. *g DATED this THIRTEENTH day of AUGUST 1990 Alchin Long Group Pty Limited Patent Attorneys for the Applicant SPRUSON FERGUSON t rhk/O193E