AU671146B2 - A lock for operating remote latches - Google Patents

Description

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AUSTRALIA

Patents Act 1990 COMPLETE SPECIFICATION FOR A STANDARD PATENT Name of Applicant: Address for Service: nvntion Titl: Invention Title: WHITCO PTY LTD CULLEN CO., Patent Trade Mark Attorneys, 240 Queen Street, Brisbane, Qld. 4000, Australia.

A LOCK FOR OPERATING REMOTE

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Details of Associated Prov;isional Applications: No. PL5379 filed 20 October 1992 The following statement is a full description of this invention, including the best method of performing it known to us: 9 i r l i:i 1 r

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j i j: K i: j:i rr; 4 ii_ l- 2 THIS INVENTION relates to a lock for operating remote latches and particularly relates to such a lock wherein the remote latches can be operated by a key as well as a snib.

Locks having remote latches typically comprise a central lock body and one or more remote latches which are operated by the central lock body. The one or more remote latches are positioned adjacent upper or lower ends of the *door or window to which the lock is f itted. The remote latches are connected to a connecting rod. The connecting rod 1~ in turn is connected to and operated by operating members which are located in or substantially in the central lock body. The advantages of such locks (also called multi-point locks) is an improved security against unauthorised intrusion.

Such multi-point locks are disclosed in our earlier 44 AVU patents.557075 and.574388.

Patent 557075 describes a lock where the operating members are pivotally connected to or linked to d rotatable disc member. The rotatable disc member is attached to an external knob such that the disc can be rotated, and thus the operating members operated, externally of the lock. The advantage of this system was that it did away with the requirement to utilise a key every time iJt wari necessary to operate the remote latches. The disc could be deadlocked against .Lctation by a deadlocking lever which could be moved between its deadlocking and undeadlocking position by a key cylinder. Thus, the remote latches could initially be operated by the external knob and thereafter could be deadlocked by a key.

A disadvantage with this system was that the key t 3 cylinder itself could not operate he remote latches but I could deadlock the knob against rotation.

Patent 674388 describes a lock wherein the key cylinder itself could operate the remote latches. In this arrangement, the key cylinder could cause one of the operating members to be moved between a retracted and extended position, and this operating member was linked to the other operating member through a rocker arm. Thus, both operating members (and therefore both remote latches) could be controlled by the key cylinder. The operating members could be deadlocked by a deadlocking lever which could also be moved between its deadlocking and undeadlocking position by the key cylinder. A disadvantage with this arrangement was that there was no secondary knob, snib or like member which -ould be used to quickly activate the remote latches. It was necessary in every case to use a key to operate the remote latches.

The present invention has been developed to overcome the .bovementioned disadvantages or to provide the 0 public with a useful or commercial choice.

t The present invention includes a lock having S.j operating members to operate remote latches and where the operating members can be controlled both by an external Scontrol member and by a key-operated cylinder. The 25 operating members can also be deadlocked in position which can be achieved by the key-operated cylinder. i In one form, the invention resides in a lock for operating remote latches, the lock comprising a lock body, first and sejond operating members for operating the remote latches, the operating members being moveable between an I i l

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4 extended position where the operating members can cause the remote latches to adopt one of a locked or unlocked position, and a retracted position where the operating members can cause the remote latches to adopted the other of a loci-ed or unlocked position, a control member to move the operating members between their extended and retracted posi'tions, the control member being operable externally of the lock body, a key-operated cylinder having a cam which can move JON between a forward and reckrward position upon operatic-, of a key in the cylinder, a carriage member operatively connected relative to one of the control members for movement between a forward position and a rearward position upon extension and retraction of the said one control member, the carriage member being operatively connected relative to the cam of the cylinder such that movement of the carriage member from its rearward p osition~ to its forward position causes the cam to move f rom its rearward position to an at least partially forward position.

The lock may be fitted to a sliding or swinging wing such as a sliding or swinging door or window. Typically, the lock can be used for sliding security doors.

The lock body may comprise a front end wall, a rear end wall a top end wall, a bottom end wall and a pair of *spaced opposed side walls. The front end wall may include an opening to allow a loc% tongue to engage with a keeper.

The operating members may project through the top end wall and bottom end wall respectively (or if no end walls are present, through the respective area), or slightly behind the end walls, if the operating members do not extend therethrough. Each operating member may comprise an elongate body. The body may be substantially flat. One end of the operating member may extend past the top end wall or bot om end as the case may be, and may include an opening to allow it tc pivotally coupled to a control rod. Suitably, each operating member can slide between its extended and retracted i position. It is preferred that the operating members extend 1i"' substantially parallel to the side walls and also that the operating members extend immediately behind a respective side wall. In this arrangement, the operating members can slide over the rest of the internal lock componentry.

The operating members may be operatively connected together such that extension or retraction of one of the operating members also causes the other operating member to move. Thus, the operating members may be connected to a rotating interconnecting member. The rotating interconnecting member may comprise a rocker, disc or the like. Suitably, the inter-connecting member comprises a rocker which may be formed with a pair of oppositely-extending arms. Each arm may be operatively connected to a respective operating member.

Suitably, the operating member is operatively connected ?7 1 adjacent a free end of a respective arm of the rocker. Suitably, each arm is provided with a projection or button ,1 which may located within a slot or recess formed on the respective operating member. Thus, rotation, either in a clockwise or anti-clockwise direction, of the inter-connecting i member can cause the operating members to move between their C C 313".

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C 6 40 *4 0 *9**49 0 o 0 0 *04* *004 extended and retracted positions.

The control member may be pivotally 'iected to the remainder of the lock and can be pivotally -',aa.~ected to, or relative to, a side wall. The control member is suitably connected to an external knob, lever or snib which can be operated by a person which in turn can allow the person to lock or unlock the remote latches. The control member suitably comprises an arm. The arm may be pivotally connected adjacent one end to the remainder of the lock body and may include a f ree other end. The f ree end of the arm may engage with the carriage member. Suitably, the f ree end locates within a slot or recess in the carriage member. Operation of the control member may allow the carriage member to move between its forward and rearward positions which in turn cause the operating members to adopt their extended and retracted positions. The control member may alternatively be connected to the inter-connecting member, or to an operating member.

The key-operated cylinder may include a rotating cam member. The cam member can be rotated between a forward and rearward position ipon insertion and turning of a key in the key cylinder.

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The carriage member suitably comprises a slide located within the lock body. The slide may be elongate and subeztantially flat and may include a pair of opposed ends.

The slide may include a recess adjacent one end in which the cam of the key cylinder may locate. Movement of the carriage therefore may result in the cam being moved between its rearward and at least partially forward position.

The carriage member may be operatively connected to

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20 'the inter-connecting member such that movement of the interconnecting member can cause the carriage member and the operating members to move. Suitably, the carriage member is coupled to the inter-connecting member such that its degree of movement is less than that of the operating members. If the inter-connecting member comprises a rocker arm, this can be achieved by coupling the operating member to adjacent one end of the rocker arm and connecting the carriage member intermediate the ends of the rocker arm. Rotation of the rcker arm will then cause the operating member to move further than the carriage member.

Alternatively, the carriage member may be coupled to the operating member through a slide type arrangement to allow for different amounts of movement.

The cam member suitably urges the carriage member between its rearward and forward positions upon rotation of the cam. As the carria4ge member is operatively connected to the control member, such an action can cause the operating members to operate the remote latches. Thus, the key cylinder can operate the remote latches independently and separately from the control member.

The lock may include a lock tongue. The lock tongue may comprise a reciprocatir,. tongue or a rotating tongue.

The lock may iclude deadlocking means. The deadlocking means may c jadlock the operating members and/or the lock tongue. Suitably, the deadlocking means deadlocks the carriage 'to prevent it from being moved from its forward position to its rearward position.

An embodiment of the invention will be illustrated

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8 by reference to the following description of an embodiment in which Figure 1 is an external view of a multi-point lock according to the invention; Figure 2A is an internal view of the lock of Figure 1 wherein the operating memabers are in the retracted position; Figure 2B illustrates the lock of Figure 2A wherein the operating members are in the extended position and are controlled by the control member; Figure 3 illustrates a lock wherein the operating members are in the extended position and are controlled by the key cylinder.

Referring to the drawings, and initially to Figure 1, there is shown an external view of a multi-point lock. The i multi-point lock includes a central Lajck 10 and a pair of remote latches 11 and 12. The remote latches form no part of the invention and shall not be discussed further. Each remote latch is pivotally coupled to operating members as will be *discussed below. Central lock 10 includes a pull 14 in the form of a proud f lange which can be gripped by a person Is fngers. The lock further includes a lock tongue handle which can be rotated to pivotally move an internal rotating lock tongue between an engaging and f ree position. Below handle 15 is provided an external snib 16 which can be pivotaliy moved to control the control member as shall be discussed below. Below snib 16 is a key cylinder 17 which shall also be discussed below.

Referring to Figure 2A, there is shown the internal componentry of the lock in an unlocked position. Lock

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*44* SOdS comprises a housing 18 which is formed with a top end wall 19, bottom end wall 20, rear end wall 21, front end wall 22 and a pair of side walls (not shown). Front end wall 22 is formed with an opening 23 to allow a keeper 24 (see Figure 2B) to pass into housing 18 and engage with rotatable lock tongue Rotatable lock tongue 25 is pivotally connected to housing 18 around pivot point 26 and include a shoulder or hooked portion 27 which engages with a correspondingly shaped portion 28 on keeper 24. Lock tongue 25 can be manually rotated between an unlocked position as shown in Figure 2A and a locked position as shown in Figure 2B by handle 15 (see Figure Lock tongue 25 can be held in its unlocked position as illustrated in Figure 2A by member 29 which is in the form of an L-shaped lever pivotally connected adjacent one end through pivot pin 30. The other end of member 29 is formed with an engagement 31 which can engage with engagement 32 on lock tongue Member 29 is biased into the engaged position by spring 33.

It can be seen that when lock tongue 25 is initially rotated from its locked position as illustrated in Figure 2B to its unlocked position as illustrated in Figure 2A, it will engage with member 29 and will therefore be held in the unlocked position. Upon insertion of keeper portion 28, member 29 can be displaced as shown in Figure 2B, which will cause lock tongue 25 to adopt its closed position through the action of spring 34. To facilitate this action, there can be provided a button 35 biased to project from front end wall 22 of -the look and which when depressed can also cause member 29 to adopt its released position as shown in Figure 2B. Depressing of button can either be done by a person's fingers or upon the lock-

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striking keeper 24 as illustrated in Figure 2B.

Located within housing 18 are a pair of operating members comprising an upper operating member 40 and a lower operating member 41. Operating members 40 and 41 are in the form of elongate substantially flat plates which are positioned to be substantially parallel with the side walls of the lock. Operating members 40 and 41 also extend just below the inside face of one of the side walls such that they slide I o over most of the remaining lock componentry. Each of operating members 40 and 41 have a first end which projects Sfrom top end wall 19 and bottom end wall 20, respectively, and this end may be formed with an eyelet or opening 42, 43 to allow it to be pivotally coupled to control rods 13 as illustrated in Figure 1.

The other end of each of operating member 40 and 41 o is formed with a recess 44, 45 which can accommodate an interconnecting member in the form of a rocker 46.

Rocker 46 is pivotally mounted to housing 18 and includes a pair of diametrically opposed arms 47, 48, the free ends of which are provided with extending projections or buttons 49, 50. These buttons locate within respective recesses 44, 45 of the operating members 40, 41. Rocker 46 Scan rock or pivot between the positions shown in Figures 2A and 2B which in turn causes the operating members 40, 41 trs move between their retracted and extended position. In the extended positions (as shown in Figure 2B) the operatig members cause the remote latches to lock, while in -he i retracted positions as shown in Figure 2A, the operating members cause the remote latches to adopt an unlocked L Rk 7 v~ t~r-i t~ I position.

Lock 10 is further provided with a key cylinder Key cylinder 60 can be of known design and includes a cam member 61. Cam member 61 can be caused to rotate between a lower (rearward) position as illustrated in Figure 2A and an upper (forward) position as illustrated in Figure 3 upon insertion and turning of a key in key cylinder Positioned adjacent key cylinder 60 is a carriage 62. Carriage 62 comprises a flat slide member wnich can be moved f rom a rearward position as shown in Figure 2A to a forward position as shown in Figure 2B and in Figure 3. The lower end of carriage 62 (in use, the lock being positioned vertically), is formed with a recess 63 which can accommodate the cam member 61 of key cylinder 60. Thus, rotation of cam member 61 causes carriage 62 to move between its rearward position and forward position as illustrated respectively in Figures 2A and 3. As wail, movement of carriage 62 by the snib (see below) also causes cam member 61 to be moved to a partially forward position as illustrated in Figure 2B.

The lock also includes a control member 90. Control member 90 comprises an arm pivotally connected adjacent one of its ends to the lock body to pivot about a horizontal axis in use. The arm has a free end 91 which is formed with a bulbous nose. This free end 91 locates within a complementary recess 92 provided in carriage 62. Control member 90 is coupled externally to snib 16 such that it can be rotated upon operation of the snib. Rotation of carriage member 90 in a clockwise direction as illustrated from Figure 2A to Figure 2B, causes carriage 62 to move upwardly which in turn causes j ~AiU 9. **9I -i ir S12 the operating members 40, 41 move to their extended positions.

Conversely, rotation of control member 90 in an anti-clockwise direction will cause the operating members to be retracted.

Carriage 62 has an upper end provided with a recess 96 which accommodates a button 97 on rocker 46. Button 47 is positioned inwardly from button 50 which connects to operating member 40. This particular arrangement is required to ensure i that the movement of carriage 62 is less than the movement of operating member 40. This is achieved by the particular coupling arrangement on rocker 46. Thus, in practice, it is found that this arrangement will cause operating member 40 to move approximately 13 mm between its extended and retracted positions while carriage 62 is moved about 6 7 mm. It is necessary that operating member has a larger degree 151': movement to ensure adequate locking of unlocking of the remote latches. However, such a large degree of movement is not appropriate within the lock body as all the components are S crowded together. Thus, carriage 62 requires a sliding movement of about 6 7 mm. This, however, is dictated by the lock dimensions and for larger lock bodies, this may not be a necessity.

Also, while the embodiment illustrates carriage 62 as being connected to rocker 46, carriage 62 could also be connected directly to operating member 40 through a pin in slot arrangement to accommodate for the different degrees of movement.

To operate the remote latches purely with snib 16, snib 16 can be rotated to rotate control member 90. As control member 90 rotates from its position illustrated in "Mn position upon operaL_.

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13 Figure 2A to its position illustrated in Figure 2B, it causes the operating members 40 and 41 to adopt their extended position as illustrated in Figure 2B and this in turn will cause the remote latches to lock. Conversely, rotation of snib 16 in the other direction will cause the operating members to retract within the lock body. Thus, in this arrangement, snib 16 can be used to quickly lock or unlock the remote latches without the need for a key to operate key cylindc z Should it be desired to operate the remote latches through key cylinder 60, a key can be inserted therein and rotated. This will cause carriage 62 to move upwardly to its position as shown in Figure 3 which in turn will caise operating members 40 and 41 to adopt their extended position as shown in Figure 3. Again, this causes the remote latches to adopt their locked position. To unlock the remote latches, the key can be rotated in the other direction in key cylinder 60 which will cause carriage 62 to be moved downwardly to its rearward position as illustrated in Figure 3. It can now be seen why it is necessary to have carriage 62 connected to upper operating member 40 (through rocker 46) as this allows the operating members to be retracted upon movement of carriage to its lower position. In the absence of such an engagement, key cylinder 60 would not be able to cause the operating members to adopt their retracted position.

Key cylinder 60 can tlso operate a deadlocking means. The deadlocking means can be in the form of a pivot lever 80 which can be biased by spring 81 to engage with carriage 62 when carriage 62 is in its forward position as i s s I i

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14 illustrated in Figure 3. Thus, in this position, carriage 62 is deadlocked which in turn deadlocks operati.; members 40 and 41. To undeadlock carriage 62, cam 61 can be Lotated from its upper position to its lower position and in doing so initially frees the deadlocking member from carriage 62. This arrangement is known and in some ways it can be similar to that illustrated in our earlier patent 574388.

An advantage of the lock according to the above embodiment is also that key cylinder 60 can override the snib 1 mechanism 16, however, snib mechanism 1.6 can not override key cylinder 0 Thus, a sliding security door can be closed and initially latched only with l-ck tongue 25. Should the need occur, snib 16 can be quickly operated to engage the remote 1 latches. Alternatively, a key can be inserted into key cylinder 60 to also operate the remote latches.

If the operating members are in an extended position through the action of snib 16, and it is desired to deadlock the arrangement, a key can be inserted into key cylinder 16 206.: and rotated to move up carriage 62 and to deadlock carriage 62 as described above.

Alternatively, key cylinder 60 can do the entire operation of extending the operating members and deadlocking the operating members in one action.

Snib 16 can not override the deadlocked lock, however key cylinder 60 can override snib 16.

It should be appreciated that many other changes and modifications may be made to the embodiment described without departing from the spirit and scope of the invention.

Claims (17)

1. A lock for a wing, the lock having operating members to operate remote latches and where the operating members can be controlled both by an external control member, and by a key-operated cylinder.

2. The lock as claimed in claim 1, wherein the operating members can be deadlocked by the key-operated cylinder.

3. The lock as claimed in claim 1 or claim 2, wherein the wing comprises a s-Jding or swinging door

4. The lock as claimed in any of the preceding claims, wherein the control member is a knob or onib. A lock for operating remote latches, the lock comprising a lock body, first and second operating members for operating the remote latches, tne operating members being moveable between an extended position where the operating members can cc..use the remote latches to adopt one of a locked or unlocked position, and a retracted position where the operating members can cause the remote latches to adopt the other of a locked or unlocked posiLion, a control member to move the operating members between their extended and retracted positions, the control member being operable externally of the lock body, a key-operated cylinder having a cam which can move between a forward and rearward 25 position upon operation of a key in the cylinder, a carriage member operatively connected relative to one of the control members for movement between a forward position and a rearward position upon extensi on and retraction of the said one control member, the carriage member being 'I A IV7- 0 149 i/ a 16 operatively connected relative to the cam of the cylinder such that movement of the carriage member f rom its rearward position to its forward position causes the cam to move from its rearward position to an at least partially forward position.

6. The lock as claimed in claim 5, wherein the lock is fitted to a sliding or swinging door or window.

7. The lock as claimed in any one of the preceding claims, wherein the lock body comprises a front end wall, a rear end wall, a top end wall, a bottom end wall and a pair of spaced opposed side walls, the front end wall including an opening to allow a lock tongue to engage with a keeper.

8. The lock as claimed in any one of the preceding claims, wherein the operating members project through the top end wall and bottom end wall or if no end walls are present, through the respective area.

9. The lock as claimed in any one of the preceding claims, wherein a pair of operating members are provided, each operating member comprising a substantially flat elongate body extending substantially parallel to a respective side wall and immediately behind the said respective side wall rjuch that the operating members can slide over the rest of the internal lock componentry.

10. The lock as claimed in any one of tile preceding claims, wherein the operating members are operatively connected together such that extension or retraction of one of the operating members causes the other operating member to move. o 0 4 0* rqEP,?J? 0**000 000004 .004 0 C -o I 0 IL. -o latches, the operating memJ1 L ers being moveable between an i~i CAl

11. The lock as claimed in claim 10, wherein the operating members are connected to a rotating interconnecting member.

12. The lock as claimed in claim 11, wherein the rotating interconnecting member comprises a rocker formed with a pair of oppositely extending arms, each arm being operatively connected to a respective operating member.

13. The lock as claimed in any one of claims 5 to 12, wherein the control member is pivotally moveable to move the operating members between their extended and retracted position.

14. The lock as claimed in any one of claims 5 to 13, wherein the control member is connected to, or part of an external knob, lever or srib.

15. The lock as claimed in any one of claims 5 to 14, wherein the control member engages with the carriage member such that operation of the control member causes the carriage mem!Der to move between its forward and rearward positions which in turn causes the operating members to 20 adopt their extended and retracted positions.

16. The lock as claimed in claim 15, wherein the control member includes an extending arm which can pivotally move between forward and rearward positions, the arm being operatively connected to the carriage member. 25 17. The lock as claimed in any one of the preceding claims, wherein the key-operated cylinder, includes a rotating cam member which can be rotated between a forward and rearward position upon insertion and turning of a key in the key-'ape-mNeA j~kr~v-. ft ft C), 1 ft ft. ****ftC A7 ft I ft ft *I I 2 A wherein the carriage member comprises a slide located within the lock body.

19. The lock as claimed in claim 18, wherein the slide is operatively connected to the cam of the key cylinder such that movement of the slide results in the cam being moved between its rearward and at least partially forward position i

2018. The lock as claimed in any one of claims 5 to 17, 0 19, wherein the carriage member comprises a slide located to wthinterconnecting member such that movement of the interconnecting member causes the carriage member and the operating members to move. 19. The lock as claimed in claim 18, wherein the 5 slide is operat ively connected to the interconnecting member cylinder such that the degree of movement of the slid e results in the cam less than that of the operating members whereby rotation of the interconnecting member will cause the operating members bengto move further than its rearward and at least partiallymember. forward position. 22. The lock as claimed in any one of claims 1 to 21 19, wherein the carriage member is operatively connected to the interconnecting member such that movement of the 1 including a deadlocknect ing member cans which deadlocks the carriage member and the to prevent it from being moved from its forward position to .its rearward position. 21. The lock substantially as hereinbefore described 1 25 with refrc arriage member is coupled to the interconnecting membergs. such that the degree of movementY-THIRD day of the carriage member s1995. WHITCO PTY LTD *less than that of the operating members whereby rotation of the interconnecting member will cause the operating members to move further than the carriage member. 22. The lock as claimed in any one of claims 5 to 21 9including a deadlocking means which deadloc*s the carriage ^to prevent it from being moved from its forward position to its rearward position. i 23. A lock substantially as hereinbefore described 25 with reference to the accompanying drawings. i DATED this TWENTY-THIRD day of NOVEMBER 1995. WHITCO PTY LTD By Their Patent Attorneys 1 f ptRA CULLEN CO 1 S ^J n .y j j u 1 ABSTRAC loc fo sldn or a praigmmes1 o operatA lockmore lthsliding2dr whaset operating memberst can be controlled both by an external knob or snib 16, and by a key cylinder 17.