GB2043762A

GB2043762A - Lock for sliding door

Info

Publication number: GB2043762A
Application number: GB7905425A
Authority: GB
Original assignee: Schlegel UK Ltd
Current assignee: Schlegel UK Ltd
Priority date: 1979-02-15
Filing date: 1979-02-15
Publication date: 1980-10-08
Also published as: CA1136674A; EP0015092B1; EP0015092A1; BR8000847A; DE3062490D1; ES488580A0; GB2043762B; KR830002131A; KR850001120B1; AU528313B2; JPS55114764A; ES8102254A1; MX150043A; AU5542280A

Abstract

The lock enables a door to be bolted simultaneously at the top and bottom by a single operating handle. A deadlock mechanism is incorporated operable by a conventional cylinder lock (31). In one arrangement the deadlock and the bolting mechanism can be operated from both sides of the door (10). The basic mechanism of the lock consists of an operating tangent plate (20) connected by pin and slot mechanism to a second tangent plate (24). Each tangent plate (20 , 24) is in turn connected by a pin and slot mechanism to a slider plate (21,28) and each slider plate (21,28) is connected to a bolt (16,17 respectively). The deadlock includes a slidable locking plate (44) moveable by a cam mechanism (32,32a) operated by a cylinder lock (31).

Description

1 GB 2 043 762 A 1

SPECIFICATION

Lock for sliding patio door This invention relates to locks of the type which have a single operating mechanism to activate bolts at two spaced locations and in particularthe inven tion relates to locks suitable for sliding patio doors.

An object of the invention is to provide a compact lock mechanism which enables a patio door, or a window, for example, to be bolted simultaneously at two different locations (such as the top and bottom of a patio door) by a single movement of an operat ing handle.

According to the invention a lock comprises an operating member in the form of a first pivoted tangent plate connected by a pin and slot mechan ism to a first slider plate adapted to be connected to a first bolt member, the tangent plate being con nected by a second pin and slot mechanism to a second pivoted tangent plate in such manner that clockwise rotational movement of the first tangent plate causes anti-clockwise rotational movement of the second tangent plate and vice-versa, the second tangent plate also being connected by a pin and slot mechanism to a second slider plate adapted to be connected to a second bolt member, so that rotation of the operating member causes the two slider 90 plates to move in opposite directions.

Preferably the two slider plates are arranged paral lel to each other and the pin employed to connect one slider plate to its tangent plate passes through an aperture in the other slider plate.

Movement of one of the slider plates may be limited in both of its directions of travel by a fixed abutment member engaging in a closed slot in the slider plate, so that movement of the slider plates is limited to an equal extent.

Optionally, there may be a deadlock mechanism comprising a plate which has a locking projection or foot adapted to be moved into a position in which it inhibits movement of the lock mechanism.

Said locking projection or foot may be adapted to block movement of one of the pins connected to one of the tangent plates.

The deadlock locking plate may be moveable by engagement of a rotary cam with a cam surface on the plate such as to move the locking plate to cause said projection or foot to inhibit movement of the lock mechanism.

Said rotary cam may be operable by a conventional cylinder lock.

The bolting action of the lock and/orthe deadlock action may be operable from either side of the lock.

In the accompanying drawings:- Figure 1 illustrates diagrammatically part of a patio door with a single- sided lock, embodying the present invention, incorporated in the door; Figure 2 is a section through the lock shown in Figure 1; Figure 3 is a section on the line A-A shown in Figure 2; Figure 3a is a plan view of the locking plate; Figure 3b shows a detail of the two tangent plates; and Figure 4 is a section through the same lock modified to provide a double- sided action.

In Figure 1 is shown, in chain dotted lines, part of a patio door 10 to which is fitted a lock 11 embodying the present invention. To upper and lower door frame members 12,13 respectively are fitted keep members 14,15 adapted to be engaged by bolt members 16,17 (in the form of 16'ng rods) which are to be operated simultaneously by the lock 11, thus locking the patio door both at its top and bottom.

The lock incorporates a pivoted operating handle 18 for bolting and unbolting the door and a larger fixed handle 19 for sliding the door bodily. The lock has a rigid base plate 9 which can be fixed in a recess in the door 10 by bolts (not shown).

The operating handle 18 is pivoted on plate 9 and is fixed to a first tangent plate 20 (Figures 2 and 3 and 3b). Tangent plate 20 is connected to a first slider plate 21 by a first pin and slot mechanism compris- ing a slot22 in tangent plate20and a pin 23fixed on the first slider plate 21. Slider plate 21 has a rod-like bolt member 16 fixed to it.

Tangent plate 20 is also connected to a second tangent plate 24 (see Figures 3 and 3b) via a second pin and slot mechanism comprising a slot 25 in tangent plate 20 and a pin 26 fixed to tangent plate 24. Tangent plate 24, pivoted at27, is connected to a second slider plate 28 via a pin and slot mechanism, the slot 29 being formed in tangent plate 24 and the pin 30 being fixed to slider plate 28 which is in tu m attached to rod- like bolt member 17.

When handle 18 is tu med anti-clockwise from its position shown in Figures 1 and 2 the tangent plate 20 turns in the same direction, which is clockwise as seen in Figure 3. The causes two things to happen. Firstly slider plate 21 is moved upwardly releasing bolt member 16 from its keeper. Secondly, and simultaneously, tangent plate 24 turns anticlockwise (as seen in Figure 3) which moves slider plate 28 downwardly thus releasing bolt member 17 from its keeper 15.

A deadlock enables the lock mechanism to be rendered inoperable at will.

A cylinder lock 31 which is key-operated rotates a cam 32 to contact cam surface 32a on lower foot 33 of a slidable locking plate 44. This will cause locking plate 44 to slide downwardly (see Figure 3a for two positions of locking plates) so as to bring the upper foot 45 of the plate 44 into the path of pin 26 (see Figure 2) thus preventing any further movement of both tangent plates 20 and 24. This, in turn, prevents any movement of handle 18. As shown in the drawings the deadlock has not been operated so the main bolting action of the lock can be used at will. The locking plate 44 is resiliently held in either the deadlocked or unlocked position by a spring 46 which ensures full travel in either direction of the locking plate.

Figure 4 is similarto the arrangement shown in The drawing(S) originally filed were informal and the print here reproduced is taken from a later filed formal copy.

2 Figures 1 to 3 except that the bolting action of the lock and the deadlock can be operated from either side of the lock. It will be seen that there are two operating handles 18, two cylinder locks 31 and also

Claims

two fixed handles 19 to enable any operation to be carried out from either side of the door. CLAIMS

1. A lock comprising an operating member in the form of a first pivoted tangent plate connected by a pin and slot mechanism to a first slider plate adapted 75 to be connected to a first bolt member, the tangent plate being conne6ted by a second pin and slot mechanism to a second pivoted tangent plate in such manner that clockwise rotational movement of the first tangent plate causes anti-clockwise rotational movement of the second tangent plate and vice-versa, the second tangent plate also being connected by a pin and slot mechanism to a second slider plate adapted to be connected to a second bolt member, so that rotation of the operating member causes the two slider plates to move in opposite directions.

2. A lock according to claim land in which the two slider plates are arranged parallel to each other and the pin employed to connect one slider plate to its tangent plate passes through an operature in the other slider plate.

3. A lock according to claim 1 orclaim 2 and which movement of one of the slider plates is limited in both of itq directions of travel by a fixed abutment member engaging in a closed slot in the slider plate, SO that movement of the slider plates islkriiitedto an equal extent.

4. A lock according to any preceding claims and in which there is a deadlock mechanism comprising a plate which has a locking projection or foot adapted to be moved into a position in which it inhibits movement of the lock mechanism.

5. A lock according to claim 4 and in which said locking projection or foot is adapted to block movement of one of the pins connected to one of the tangent plates.

6. Alock according to claim 4 orclaim 5 and in which the deadlock locking plate is moveable by engagement of a rotary cam with a cam surface on the plate such as to move the locking plate to cause said projection orfootto inhibit movementof the lock mechanism.

7. A lock according to claim 6 and in which said rotary cam is operable by a conventional cylinder lock.

8. A lock according to any of claims 4to7 and in which the lock and/orthe deadlock are operable from either side of the lock.

9. A lock according to any preceding claim and in which the lock and/or the deadlock are operable from either side of the lock.

10. A lock according to any preceding claim and in which said slider plates are connected to rods which act as said bolt members, the bolt members cooperating with keep members remote from the lock.

11. A lock according to claim 10 in combination with a sliding door in which said bolt members are located respectively at the top and bottom of the GB 2 043 762 A 2 door.

12. A lock according to claim 10 in combination with a hinged windowthe bolt members being located at opposite sides or at opposite ends of the 70 windows.

13. A lock substantially as hereinbefore described and as illustrated in Figures 1 to 3 of the accompanying drawings.

14. A lock substantially as hereinbefore particularly described and as illustrated in Figure 4 of the accompanying drawings.

Printed for Her Majesty's Stationery Office by The Tweeddale Press Ltd., Berwick-upon-Tweed, 1980. Published atthe Patent Office, 25 Southampton Buildings, London, WC2A lAY, from which copies may be obtained.

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