AU2006252028A1 - Improvements in Locks - Google Patents

Description

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0 Sumr0fa neto codn ooeapc fteivninteei okicuigalthbl firSumarydof anseInvetonlce ofgrto htpelue h isnacigmme 0 I sAcodgto aspect of the invention, therdhde iassck includ aatcnbl '4T~ I diplcabeind rsponseo toe actuation, ofha first unlatching member incalfirs handlee V ass~cyinebl anpdsacable n resons to acrtutoofscn unlatching memberi dscond hendletassebly etheacopninigrs The firsts anlasmt cuing lotevrockin msens cothnntedn bylaid to a wtin the secondihandle assemblywthathiseoperabletto configur rqieothee fis hanle assembl vaiton aslc alcfiurain tha prldeso the irstlunthgmme fomeg actuatedot displaceathe lisatc boltoteens handlcso assemlege congratb aked cynsoralinrto iolate thekspindlefo h locking mmswihotber. lmie In sote condplee of teinvdhenin-h eodhnlasmlnldsa i isoating e oral vasoiated ith as "clutcineses"ocornd handl asemby nerthird aspectpof the invenion, the frste unaintgmerorupf includes au keye ccsorn to another apect r ru oft inetoeresalc.ubtnilya descrido herein eerdeboiet n with reference to the accompanying fgrs 0 Hemeadns reaingde tor theiuencs ofn the inveton amdwti r idntfedprwitin.tese~cto sflos hr nls h otx eursohr "CPrsel" or variations such as "coprisdes o icmprising' t will bemofa Ed Wd -T:90 900E ET -OaG WdtT:0 900 ?T LSSBSe6TS 'N BNOHd 10 Jind Wd Aoo7 -iuNisnH woNA ZL-ZL-900 (P-IN-A) aEa 00:8 g auW!L :e!leJlsnv dl Aq paA!leoaI ZZG6990O-IWSS :oN I SI Oo

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Sinteger is restricted to that referred to as preferred unless the context requires otherwise, "preferred" implies acceptable and if need be, able to perform a function required by the inventions in which it is included.

00 Cl "Wing" embraces both "doors" and "windows" 5 "Member" is an identifiable entity that may include one or more identifiable V' components.

"Aperture" and "recess" in general embrace a hole that extends from a Ssurface while "aperture" in some specific contexts implies a hole that extends between C1 surfaces.

"Furniture" includes "door furniture" that includes a "handle assembly".

"Handle assembly" includes a "handle" supported by a "base" that in one form comprises an "unlatching lever" supported by a "back-plate".

"Handle" includes a knob, lever and an "unlatching lever".

"Unlatching lever" includes a lever or knob that is hand operable to cause an "engaging member" to become unlatched.

"Base" includes a "rose" that may include a surface mounted member having a recess on the underside.

"Back-plate" (or "back-plate") includes a surface mounted box-like member having a recess on the underside.

"Engaging member" in isolated use, is a member displaceable between a fully displaced disposition and a fully retracted disposition. When employed with an "engagable member", the engaging member is displaceable between an operative disposition (in which the engaging member finds itself when engaged with the engagable member) and an inoperative disposition removed from the said engagement. Within this specification, fully displaced will embrace the operative disposition and retracted disposition will embrace the inoperative disposition.

"Latching" implies displacement of an "engaging member" into engagement with an "engageable member" under the action of biasing means.

"Latch-bolt" or "latch bolt" is an outwardly biased bolt capable of executing (or participating in) latching and includes bolts having a leading end that is chamfered or otherwise profiled on one or both sides.

"Auxiliary bolt" is an outwardly biased plunger that is operably associated with a latch bolt.

"Unlatching" means withdrawal of the engaging member from engagement.

"Locking" means the act of configuring the lock to restrain it from Ed WC12T:90 900Z ET -Oaca LddtT:90SS~LSS TN 1OHI Aoo-i idaisnu woa_ Zk.-ZL-900 aIBe 00:81 (uJ:H) aWLL :elejsnv dl Aq pa!GaOH ZZ617'9SO0-IV 9S :ON al SVo00

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Cl being unlatched and in some forms of locks employing deadlocking slides, it means restraining the deadlocking slide to restrain the bolt from being inwardly displaced in response to operation of the unlatching lever.

00 C "French Door" means a door including a frame and a glass in-fill.

"Screen door" means a door including a frame and an insect restraining fl in-fill such as fibreglass mesh, woven mesh or perforated metal mesh; "Lock body" includes an engaging member and a lock casing.

"Mortise lock" means a lock including a lock body, a strike plate, a pair of Cl handle assemblies and a cylinder where the lock body is configured to be fitted within the frame of the wing.

"Single cylinder" means a substantially conventional lock cylinder comprising a separate subassembly that includes a key operable barrel within a cylinder housing.

"Double-cylinder" comprises a substantially conventional double lock cylinder comprising a separate subassembly that includes opposed coaxially supported barrels each operably connected to the same angularly displaceable "first cam" having a "first cam arm" characterized by a "free end" that extends radially to a "peripheral surface" defined in part by a common radial distance from the first cam pivotal axis.

"Free rotation single cylinder" includes a barrel operably connected with free movement to a first cam to enable the first cam to be displaced by the barrel from an undisplaced disposition to a displaced disposition and subsequently reversed to the undisplaced position enabling key removal; a "free rotation-double-cylinder" is configured such that each barrel is connected with free movement to the same first cam such that the cam is free (between limits) to be angularly displaced while the barrels remain undisplaced. In some forms of cylinders, one barrel is replaced by a hand operable turn knob; in some cylinders the cylinder housing comprises part of the handle back-plate.

"Set of locks" or a "lock series" includes locks constructed from a set of common components types.

Patent Specification shall be taken to include: a Body [comprising a Title, a Description of Preferred Embodiment/s, an Abstract and a Summary of the Invention] and Claims.

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L' The elements relating to the various aspects of the current invention claimed within and other elements described within ma~y also be employed within other inventions subject 0 ofdviina ppi4tos L Descri ptiori of drawings Embodiments of the present invention will now be described by way of example only with reference to the accompanying drawings in which: Figure is an exploded isometric view of a lock supported in a wing, Figure 2 is an exploded view of the components of an interior handle assemble nlyviewed partly from underneath, Figure 3 is an exploded isometric view of an interior handle assembly of Fig 3 viewed partly from the outer-side.

Figure 4 is a schematic view of an unlocked handle assembly, Figure 5 is a schematic view of an unlocked handle assembly, Figure 6 is a schematic view of an unlocked handle assembly, Figure 7 is a cross-section through the lock of Figure 1 (unexploded), Figure 8 is a schematic partial view of a core and clutch Figure 9 is an exploded isometric view of the hub and latch bolt sub-assemblies, Figure IOA is an isometric view of a cross-section view of an adapted handle assembly with the spindles isolated.

Figure 1 0B is an isometric view of a cross-section view of an adapted handle assembly with the spindles operably connected Figure 1 IA is schematic cross-section views in a plane that intersects the arm of the locking member showing different states of the adapted handle assembly and corresponding isometric views of the clutch and locking member Figure I 1 are side cross-sectional views corresponding to those of Fig 1 1A Figure IIC to 11E are enlargements of views in Fig 11B Figure 12 is a schematic side view of the latch bolt sub-assembly, Figure 13 is a schematic plan view of the latch bolt sub-assembly, Figure 14 is an exploded view of the latch bolt sub-assembly, Figure 15 is a schematic side view of a latch bolt sub-assembly where the bolt is of extended length.

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In a particular form of lock configured as an entry lock, the lock includes an exterior keyed 00 core and an interior thumb-turn core either of which may be operated to Jock the exterior Cl lever; the interior handle being free at all times to be operated to retract the latch bolt. In some forms, a spindle 27 extends between handle assemblies to rotationally couple the core (or other operable means) in one handle assembly to a clutch in the other, th e spindle IND having an axis of rotation coaxial with the drive shafts axis and preferably being of o rectangular cross section; commonly the spindle at one end mates within a rectangular Cl aperture in the base 78 of the clutch cage, while at the other end it mates within an elongated rectangular recess in the shank portion of a thumbturn.

Handle assemblies in some form comprise an unlatching member mounted in a base, for example the interior unlatching member 8 mounted in the interior base 22 that may comprise a interior rose 23; bases in general comprise an outer surface provided by a wall and a recess in the underside (referred to herein as a "base recess") bounded by the wall and in usage, also bounded by the surface of the wing to which it is attached; roses in general have an outer surface substantially comprising a surfaces of revolution.

Bases may be simply attached to each other by screws that pass freely through apertures in the interior base to engage threadedly in apertures in the exterior base or they may be attached independently directly to the wing by screws that pass freely through apertures in each base. Bases may alternatively be configured to be attached to the Wing by means including a fixing screw 24 that passes through the wing and in a particular form of latch bolt assembly having an associated hub, by extending through the hub aperture 28. In some forms, a hub 3 i ncludes a peripheral recess 25 through which the fixing screw 24 extends to prevent relative rotation between the hub and bases. In some forms, there are multiple such fixing screws 24. Locks may be further configured to include a substantially laminar (and preferably steel) fixing plate 31 situated within the base recess of the interior base 22 attached relative to the interior face of the wing by the fixing screw 24 that extends through an aperture 32 in the fixing plate 31 to engage (in threaded engagement) in an elongated aperture 33 in the underside of the exterior base 20 to attach the exterior base to the wing while also attaching the fixing plate to the wing;, and there may be multiple, spaced, such fixing screws. As well as providing an improved method of fixing, the steel fixing plate also provides a barrier for fire and flame.

In some forms a plate 34 also resides within the base recess of the interior base 22, the plate 34 having a screw aperture 35 through which a screw extends to engage in a coaxial aperture in the underside of the interior base 22 whereby to attach the plate 34 to 2-d Wd6T:90 900E ET -OaC[ 1W HdET:80800~ ~T ~SStSSBSSET9 'ON BNOHd>10 UIflNOA Aoo-i idmisnu wom_,i Uk-Z1-9OO0 (PI1N-A) GIG00 81 (wu:H) GW1j :ei~eaqsn~ dlAq poAIaO39U ZZ61799-IV9S :ON ci SVJOZ Cl 7 Cl the interior base 22; there may be a pair of opposed such plates attached by multiple screws each including an apertures 36 through which a screw 38 orthogonally extends so the threaded shank portion protrudes from the underside of the interior base 22; coaxial 00 with each screw 38 is an apertures 39 that extends from the outer surface of the base (i.e.

Nl from an opening in the wall of the base) to provide passage for a tool so that it may in engage the head of each screw 38 (on the underside of plate 34) whereby to enable the N screw to be turned to engage an apertures 40 in the fixing plate 31 whereby to enable the

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interior base 22 to be attached to the fixing plate 31 and hence attached relative to the wing; The bases may further include inwardly pointing tabs or pins 26 that become embedded in timber wings (or locate in slots in steel doors) to prevent rotation of the bases relative to the wing.

In some forms of the invention, either the interior or the exterior or both handle assemblies include a locking means so for convenience of description only, a locking means will first be described with reference to the interior handle assembly, where a clutch 70 includes an inner end 71 of the associated drive shaft 19, a locking bar 72, a cage 73 and a substantially cylindrical shank 74 of the unlatching member that is supported within a substantially cylindrical aperture 75 in the interior base 22; the drive shaft 19 having an axial aperture 76 to provide free passage for the spindle 27 (as does drive shaft 18).

Cage 73 comprises a substantially hollow cylindrical member having a substantially laminar base 78 and a curved peripheral side 79 with a pair of opposed substantially triangular apertures 80. Each aperture 80 in the curved side includes an inclined wall 81 that commences at a first end adjacent to the open end 99 and extends towards the base as it simultaneously extends around the periphery to define a helix-like locking surface 82 that terminates in a second end closer to the base 78. In some forms, the first end is connected to an extension 83 that lies in a plane parallel that which defines a face of the base and the second end is connected to an opposed extension 84 that also lies in a plane parallel that which defines a face of the base. The apertures 80 are further configured to permit relative passage with working clearance of the locking bar within the opposed helix-like apertures.

The locking bar 72 comprises a substantially laminar member (defined between parallel planes substantially orthogonal to the pivotal axis of the cage) includes a substantially coaxial circular portion 88 having a coaxial aperture 87 connected to opposed wings 88 and 91 that extend substantially radially from the circular portion 86 (and within the planes defining the locking bar 72). The wings 88,91 extend through the Rd LWdBT:80 900E ET SSSBBER u BOH>10 UCS2 LC SS S98962T9 'ON DNOHd Aoo-i -iuaisnu wo&,i ZI-U-900 oeo 00:8 a! :eleJIlsnV dl Aq paA!aa9 ZZ6t9SO-II9S :ON 01 SVJOO 0 0 o~ppos@C1 aperEurM5 OU OT Mel G f UJ fdXLeFIU IF1LU UPPVUU I 1LLeO aI.UF;LUIUS ui mu1 :Srian 74. In a particular form of clutch that restrains the unlatching handle in the looking configuration, the wings 88,91 extend outwardly to partly extend from the outer periphery 0 c-I of the shank 74 to engage in peripheral recesses 115 of the handle base. Because of 0 5 requirements relating to other aspects of the handle design, it may be necessary to configure the lock to have a wedge shaped first wings 88 bounded by the angularly Ispaced radially disposed edges 89 and 90 and by an outer edge 92 of constant radius oand a second anchor-like wing 91 having portions that extend peripherally to be Cl bounded by substantially radially disposed edges spaced further apart (at an increased angle) as shown in Fig 4.

The second wings 91 extends through the opposed apertures 80 of the cage to extend through a second slotted apertures 93 of the shank 74 that is elongated in a direction parallel to the axis of rotation of the shank and having an opening of constant width and spaced to permit passage of the wing 91 in an axial direction with working clearance. Similarly, the first wings 88 extends through the opposed apertures 80 of the cage to extend through a similar second slotted apertures 85 of the shank 74.

The shank 74 further includes an axial aperture 95 configured to receive and support the cage 73 with working clearances it may comprise a substantially cylindrical aperture as shown. In some forms, the shank and slotted apertures 93 extend from a bearing annulus 104 formed at the junction of the shank and handle so that the shank comprises opposed curved fins 105 extending from the hand operable portion of the unlatching member.

The substantially cylindrical inner end 71 of each drive shaft comprises a cupped portion as shown in Fig 3, that extends axially between a substantially disc-like planar portion 97 and an end 98 having a surface that lies in a plane orthogonal to the pivotal axis of the cage; the peripheral side wall 96 of the inner end 71 has opposed slotted apertures 106, as shown in Fig 4, to receive the wings 88 and 91; the slotted apertures 106 being elongated in a direction parallel the pivotal axis of the cage and configured to provide passage (with working clearance) for the opposed wings in a direction parallel the pivotal axis of the cage.

The drive shaft 19 is supported so that an underside surface 101 is substantially aligned with the open end 99 of the cage as shown in Fig 7; the clutch is further configured so that the annular portion 96 is within the cage and longitudinally disposed to be able to receive the wings when the cage is in an angular disposition corresponding to an unlocked clutch. The interior drive shaft 19 is retained from displacing away from the 6d Wd0E:90 900E El -3;G qd N98969T9 'ON BNOHd ADOo idmisnU WON-j ZL-ZL-9OZ(P-n-,) awe 00:91.(wu:H) OWuj :eIesnV dl Aq p9A!aOOO ZZ617t90-LN9S :ONCQISVJO Cl 9 Cl cage by a washer 100 that overlaps both the open end 98 of the cage and the underside surface 101 of the planar portion 97. The drive shaft is restrained from displacing towards the case by a compressed compression spring 102, as shown in Fig 7, that acts on both 00 the base 78 of the cage and the drive shaft 19 by extending through the aperture 87 of the locking bar to urge them apart. The washer 100 is retained relative to the shank 74 by the logs 104 of a spring washer 103 that extend inwardly to over lap the washer 100: the spring washer 103 comprising a substantially laminar member orthogonal disposed to the o axis of the shank and having opposed apertures 108 to receive and mate with the fins Cl 105 of the unlatchinig member to operably couple the unlatching member 8 to the spring washer 103.

The spring washer 103 is retained on the shank 74 by a cirelip 107 that fits within an annual outer peripheral recess 109 (further disposed from the bearing anulus 104) of the shank.

,The clutch further includes a compressed compression spring 113 that extends between the base of the cage and the locking bar 72 to urge the locking bar away from the base.

The handle assembly 6 may include conventional means to bias the unlatching members against displacement assembly or the spring washer 103 may be adapted to include longitudinally elongated arms 110 that extend inwardly to overlap an angled end 111 of a torsion spring 112 that biases the handle against displacement from an undispaced disposition; the spring washer 103 may also include another longitudinally elongated arm 114 that extend inwardly to overlap another angled end 111 of the torsion spring 112 that biases the handle against displacement in the other direction from an undisplaced disposition. In the undisplayed disposition of the handle 8, the torsion spring is held in a compressed state by dint of the ends 111 and 114 being held between radially spaced shoulders of the base 22; in this configuration the arms 110 and 114 abut the same sides of the ends as do, the spaced shoulders. This method of biasing is quite common.

Rotation of the cage 73 (from an unlocking disposition shown in Fig 4) in a locking direction causes the opposed locking surfaces 82 to slide over the opposed wings of the locking bar (while the locking bar is restrained against angular displacement by occupying the slotted apertures 85 and 93 of the shank) to cause the locking bar to displace longitudinally in a direction parallel the pivotal axis of the cage (from a configuration in which the wings abut and overlap the opposed extensions 83 of the cage) towards the cage base 78 against biasing by spring 113 the cage being displaceable till the wings Old WdOF:90 900E ET -3aG 0TH S2ge6T :d?9 '00N ?T3~NOHd 10 dIfB Wd ADo-i iHaisnu woa-,i ZL-ZL-9OZ (P-IN-A) Ole(] oo:81, GWuj :ejjeilsny dl Aq paApaoaUj Z61799-iIYGS:oN ci SVYo

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01 Cl abut and overlap the extensions 84, a configuration defined as the locking disposition of the cage shown in Fig 6. In some forms the peripheral length of the extensions 83 and 84 are configured to be substantially the same length as the width of the wings along the arc.

00 that defines the intersection of the cage wall and the locking member 72.

Rotation of the Cage in an unlocking direction enables the spring 113 to displace the locking bar 72 away from the base 78 as the active surfaces of the locking surfaces 82 in contact with the bar move relatively away from the base. The lock is further configured o such that in the unlocked configuration, the wings 88 and 91 occupy the slotted apertures Cl 106 of the drive shaft 19 while occupying the slotted apertures 85 and 93 of the shank to operably couple the drive shaft and shank 74 together so that they angularly displace together. In the !ocked configuration, the wings 88 and 91 do not occupy the slotted apertures 106 of the drive member as shown in Fig 5. The clutch may be further configured such that in the locked configuration, portions of the wings extend radially beyond the shank to occupy restraining recesses 115S in the base to operably couple the shank to the base as shown in Fig 6; these restraining recesses 115 being defined between substantially radial ends walls and an outer side wall of fixed radius to receive with working clearance the protruding portions of the wings 88 and 91; in the unlocked configuration, the wings are longitudinally disposed from the restraining recesses to be free of the base.

In the locks described herein, the cores and clutch cage/s cooperate to lock one or both unlatching members according to the lock configuration, cores providing a means of rotating en adjacent clutch cage or a means of rotating the spindle 27 so as to rotate the clutch cage in the opposite unlatching assembly. For example in a conventional entry lock the exterior unlatching member includes a clutch having a rectangular aperture in the base 78 that meshes with the spindle and a keyed core while the interior unlatching member includes a thumb turn connected to clutch by a spindle and each of these can be operated to lock the exterior unlatching member and/or to disengage a clutch in the exterior handle assembly thereby disengaging the exterior unlatching member from its exterior drive shaft 18.

In some forms of the above, it is a requirement to be able to rotate a key to displace the clutch to the unlocking configuration and then to return the key to the undispaced position to enable key removal while leaving the clutch in the displaced unlocking configuration. It will be appreciated that to do this, there must be some free movement between the barrel 200 and the clutch cage 73. In other forms of the above, it is a requirement to be able to rotate the key to displace the clutch to unlocking TTd NdT?:80 900E ET 'O >90 dlfl W SS _S98962T9 'ON 3NOHd Aoo-i -itfdisnu woNj ZL-ZL-9OOZ (P-n-A)aOa2 OO:SL aWL :eleJ;snV dlqAq Pa3AOal ZZ6t990-1VYS :ON UI SO0o Va 0 0

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ci _configuration but be unable to return the key to the key removal while leaving the clutch in the displaced unlocked configuration i.e. only while the key is within the barrel 200, can the lock can be unlocked. It will be appreciated that in this case there is no free movement 00 cbetween the barrel 200 and the cage 73. The different functionality is often achieved through the use of different internal components and in many types of key-in-locks, the handle/base assembly must be disassembled to make the required change of internal IND parts. Referring to Figure 8, one sees a cylinder 14 retained in aperture 16 by a screw 202 this method of retaining a core is described in co-pending application CPCT/AU2004/00675 which is hereby included by reference.

As shown in Figure 8, the cylinder or core14 may comprise the figure-8-like cylinder that may comprise the two part cylinder comprising a first portion 206 that supports the barrel and internal pins and a second portion 207 that includes the tapped hole and an aperture for receiving a portion 209 of the first portion that is bounded by an external end 210 that when assembled into the recess 16 is external of the portion 206 restraining this portion and hence the cylinder first portion from being removeable from the recess 16. The capability of removing the cylinder easily by rotating the screw 202, provides the opportunity of moving small internal parts through the cylinder recess 16 to re-configure the lock. So the key-in-handle lockset is preferably further configured to be reconfigurable by the substitution of small parts that are mounted between the cylinder and clutch and that are of a size that they can pass through the cylinder recess 16.

One such substitution relates to the provision/omission of free displacement between the barrel 200 and the cage 73 where alternative couplings discs 211 and 212 each having axial rectangular aperture 213 to mesh with the rectangular spindle 27 to provide either no free displacement and free displacement respectively between the coupler and barrel. In this form a coupler 214 is connected to drive pins 215 that are accepted within opposed longitudinally elongated spaced recesses 216 that extend from the end of the barrel (similar to recesses 142 of Fig 10) to couple the coupling disc 214 and barrel 200. The coupler has radially protruding drive arms 217 that locate between spaced drive shoulders 218 of the coupling discs 211 and 212. Coupling disc 212 has two spaced drive shoulders 218 with space between these and the drive shoulders 218; and coupling disc 211 has four spaced drive shoulders 218 with little or no space between these and the drive arms 217.

All coupling discs are operably connected without free displacement to the cage 73 of the clutch by the spindle 27 of rectangular cross-section by dint of the spindle 27 meshing within a rectangular aperture 222 in the base 78 of the cage.

ZTd WdTE:90 90OF ET -O;D(j S00S9896:T9 'ON BNOHd NDOo- iu _ISnu WONA aleG 00:9L Qwij :eiqejlsnV&d Aq paAia3oa Z6V199O-lfl9S :o0 CiSVVOO Cl 12 Cl In alternative form, the barrel 200 and coupler 214 are combined in the form of a barrel 220 having at least one and preferably opposed peripheral drive shoulders 221 00 that couple with a coupling dis c 223 with free displacement or alternatively with coupling Cl disc 224 without substantial free displacement similarly as described above.

0 5 In lockeets described above the free displacement provided by the coupler discs 212 and 223 is configured to be substantially the same as the angular displacement IND required to displace the clutch between locked and unlocked dispositions thus enabling o the key to be withdrawn when the dlutch either locked or unlocked. The clutch and Cl couplers can be configured so that when either clutch coupler 211 or 224 are connected to the cage 73 the key can only be withdrawn when the clutch is in a locking disposition and when the clutch coupler is connected to the cage at a disposition 90 degrees disposed to the first disposition, the key can only be withdrawn when the cage is in the unlocking disposition.

Multi-function lock In a particular type of the lock referred to herein as multi-function lock (suitable for entry doors), the interior handle assembly 6 is adapted as shown in Figures 10 to include a separate hand operable angularly displaceable locking-member 116 and ani interior keyed-cylinder connected to a clutch in the interior handle assembly and an exterior handle assembly 5 that includes a clutch connected by the spindle 27 to the lockingmember 116.

In the multi-function lock, the clutch comprises an adapted clutch 117 that includes isolating means 118 for disconnecting the spindle 27 from the locking member 116 to preclude the exterior unlatching member from being unlocked by the locking member 116 as shown in Fig 10OB where the spindles are connected and I10B where they are operably disconnected. in usage, on leaving a house for example: the exterior handle assembly would be locked by the locking-member 116, the interior cylinder 115 would then be locked to lock the interior handle assembly and to isolate the locking-member 116 from the spindle and the door would be pulled closed to cause the latch bolt 160 to latch and to subsequently become deadlocked.

The interior unlatching member 8 has a slotted side aperture 120 (defined between adjacently spaced planes orthogonal to its pivotal axis). This aperture provides free passage for the arm 121 of the hand operable locking-member 116 over its range of operating angular displacements. In some configurations, the multi-function unlatching lever 10 is restrained to only displace downwardly by up to 45 degrees. If the direction of locking of the cage is in the same direction as the unlatching lever rotates during 2Td WdTE:90 9007- ET -OaCl L~d Wd~:S0 900 IT ~Q SSSBS2TS :i"N 2NOHd)O12Ulfb Wd Noo-i -iu Lsnu woNA EL-ZL-9OOZ ale 100:8 eW!j :e!jejlsnV dl Aq peA!eoa8 ZZ6Vtt9O-lfl8S :ON l S/Os0 C"1 13 _unlatching then, the side aperture 120 needs accommodate the exterior unlatching lever 9 and locking-member 116 simultaneously displacing to 45 degrees while the interior lever remains undisplaced and the side aperture needs to accommodate the clutch being locked 00 while the handles remain undisplaced. The side aperture also needs to o 5 accommodate the interior lever 10 being displaced while the exterior remains undisplaced In% requiring the side aperture to extended 45 degrees in the opposite direction; in all an IND opening to accommodate 135 degrees relative displacement between the base 22 and the Carm 121. Similarly, if the direction of locking of the cage is in the opposite direction as the Cunlatching lever rotates during unlatching, then again an opening to accommodate 135 degrees is required.

In these locks, the spring plate 103 includes one and preferably two outwardly extending side shoulders 230 shown in Fig 2 that lie between the planes defining the spring plate 103, these each defined between substantially radial edges 231. Referring to Fig 6, one sees a spring plate 103 supported on the shank 74 and adjacent to a substantially circular cover plate 233 having multiple screw apertures 234 that extend from the cover plate 233 and into the base 22. These screw apertures intersect the path of movement of the side shoulders 230. The screw apertures 234 are configured to align with an edge 231 when the lever 10 is undisplaced and on the side that movement is to be restricted so that when a removeable screw is inserted, it correspondingly restricts unlatching member movement. When a screw is similarly placed in a different aperture on the other side of the shoulders 230, movement is restricted in the other direction and in this way the lock can be configured for left and right handed doors.

The description of the multi-function lock immediately above is made in terms of an interior unlatching lever 10, the same elements and configurations are however applicable to the exterior handle assembly 5 and to unlatching members in general and bases in general.

In the assembled handle 6, the slotted aperture 120 is longitudinally disposed to intersect (or be adjacently disposed to) the base 78 of the cage and to preserve the integrity of the unlatching member 8, this slotted aperture 120 is longitudinally disposed from the bearing face 104 to provide a annular shoulder 122 that includes the bearing anulus 104 and from which the curved fins 105 extend.

The arm 121 includes a substantially circular laminar member 123 that coaxially abuts the outerside of the cage base 78; this member 123 is rigidly connected to an axial secondary spindle 124 that extends into the space within the cage (and preferably has the same rectangular cross-section as the spindle 27) and has an end portion 125 that PTd WdEE:90 900E EIT -Oac SS LS9896£;9 'ON ENOHd Noo07 71uzLsnu wONA 1wcj OOSL Cw:H) awli :eIejisnV dlAq paAl9aU~ ZZ6tt79O-lr9S :o1lSflO Cl 14 22 abuts an end portion 126 of the spindle which is retained in this relative disposition by a circlip 127 attached to the spindle (that is free to rotate relative to a bearing face 128 of 0c' the drive shaft 19).

Cl Within the cage 73 of the interior handle assembly 6 of the multi-function lock is an axially (longitudinally) displaceable isolating member 130 biased by the compressed compression spring 131 to abut the locking bar 72 and located between the looking bar IND 72 and the cage base 78. The isolating member 130 is characterized by an axial aperture o 132 having an active portion 133 that in the unlocking configuration of the interior handle Cl assembly, mates simultaneously with ends 125 and 126 to couple them together (the active portion mating with working clearances with the spindles to enable the isolating member to elide along both spindles. In the locked configuration of the interior handle assembly, the isolating member 130 is disposed further towards the cage base 78 having been displaced there by displacement of the locking bar 72 during its displacement to its locking configuration and in this locked configuration the active portion 133 of the isolating member 130 is Withdrawn from the spindle end portion 126 enabling the spindle 27 to be rotated independently of the locking-member. In some forms, the isolating member comprises an orthogonal disc-like portion connected to a cylindrical portion that extends into the aperture 87 of the locking member 72. In some forms, the spindle, secondary spindle 124, laminar member 123, drive shaft 19, unlatchlng member 8 and cage 73 all share the same pivotal axis.

The disc-like laminar member 123 has one and preferably opposed annular slotted apertures 135 [a first end 137 and an opposed second end 138 and defined by inner and outer annular walls each defined by a radius]; these apertures being in effect, clearance apertures for pins 148 that engage with the cage 73- The base 78 of the cage 73 has one and preferably opposed substantially similar slotted apertures 136 [having drive ends:a first locking end 139 and an opposed second unlocking end 140].

Within the adjacent barrel 200 is one and preferably opposed elongated longitudinal drive apertures 142 that extend from an opening 143 in the inner end of the barrel and in a direction parallel the pivotal axis of the barrel and connecting the drive apertures is another, substantially rectangular slotted aperture 144 that extends longitudinally into the barrel but not to intersect the last pin recess 145. The slotted apertures 144 and drive apertures 142 together house an H shaped connector 146 having longitudinally elongated legs 147 supported in the drive apertures 142 and longitudinally elongated opposed arms 148. [protruding from cross-portion 1491 extend STd WdZZ:90 900? ZT -O2OH)f l~IfU Wd SS2S98962T9 'ON 3NOHd Noo-1 iudisnu woaA Z -L-9OZ(P-r4-,k)a6ERQ OOSL (w:H)aBUJj_:!IBJISflV dlAq paAl-aa ZZ6t199O-lflS9S :oNci SflOO Cl Cl into the apertures 135 and 136 while the cross-portion 149. is supported within the slotted aperture 144.

In some configurations of this lock, when the interior key is removed, the H shaped 00 drive conn ector 146 is held remote from the laminar member 123 by a compressed axial compression spring 150 that acts between the cross-portion 149 and the laminar member 123 but when the key is inserted, the key end 151 engages the cross-porflon 149 to displaces the H shaped connector longitudinally [till the key and pins 152 are axially aligned to enable barrel rotation] in which configuration the arms 148 extend through the slotted apertures 135 and into the slotted apertures 136 of the cage base 78 to overlap the locking ends 139 of the cage aperture/s, In other fornms, the arms 148 are always occupy the slotted apertures 135 and 136.

Rotation of the key cause the cage 73 to rotate to the locking configuration looked at which point, the key can be rotated in an unlocking direction as the arms 148 of the drive connector rotate freely within the slotted aperture 136 and 135; the slotted apertures extend sufficiently to enable the barrel to reach the key removal disposition before the arms abut the unlocking end 140 of the cage aperture.

The slotted apertures 135 are configured relative to the slotted apertures 136 (for fee movement within the apertures 135) such that in the configuration where the exterior unlatching member 7 is locked and the interior unlatching member 8 is unlocked and the key is fully inserted, the arms 148 abut the locking ends 139 of the slotted apertures in the cage and are adjacent to the first end 137 of the slotted apertures of the member 123; after rotation of the key to lock the interior handle assembly, the arms 148 simultaneously abut the locking ends 139 of the slotted apertures in the cage and abut or adjacent to the second end 138 of the slotted apertures in member 123.

When the key is subsequently returned to the key removal disposition, the arms 148 become adjacent to the unlocking end 140 of the slotted apertures in the cage.

Subsequent rotation of the key (from the key removal disposition) to unlock the clutch results in a configuration where the arms 148 simultaneously abut the unlocking ends 140 of the cage slotted aperture and abut or adjacent to the second end 138 of the slotted apertures in member 123. Subsequent rotation of the key to the unclisplaced disposition brings the arms again into contact with the locking end 139 of the slotted apertures.

To accommodate, differences in door thickness, the cage of the exterior handle assembly is adapted to include an axial cylindrical extension 154 that protrudes into the space in the cage and this has an axial aperture 155 to mate whereby to comprise a telescopic joint.

STd Wd2E:90 900? ZU -02QBOd)D12dGf~W MS9139GET9 "ON DNOHd Aoo7 -iu :Lsnu woaA ZL-ZL-9OO (P-LAJ-A) a010:8L ewij :eiwesn~'dl Aq paA~aOau] Z6t1990-1S ON01 SLNOO Cl 16 Cl In some such locks, the exterior handle assembly includes a cylinder. H shaped connector and associated spring and clutch but the cage base 78 has circular apertures 00 153 instead of the slotted apertures 136 to freely receive the arms 148 orientated such Cl that the when the cage is in the locking configuration and the exterior key is fully inserted, o 5 the arms occupy the circular apertures 153 of the cage base. From this configuration the exterior key may be turned to rotate the cage to unlock the exterior unlatching handle 8 (to IND enable the exterior unlatching member to be operated to open the wing) but return of the o key to the key removal position causes the cage to return to the locking configuration; this Cl it turn orientating the spindle end 126 so that it may receive the isolating member 130 when the interior handle assembly is unlocked during which unlocking the isolating member is displaced along the spindles under the action of the spring 131.

In other forms, the exterior cage base 78 has slotted apertures 136 as described above to freely receive the arms 148 orientated such that the when the cage is in the locking configuration and the key is fully inserted, the arms occupy the slotted apertures adjacently to the unlocking end. From this configuration the key may be turned to rotate the cage 73 to unlock the lock (to enable the exterior unlatching -member to be operated to unlatch the wing); in this form, the isolating member 130 is retained displaced from the spindle end 126 till the locking-member 118 is returned to its undisplaced (unlocking) disposition and in this form, the spindle of rectangular cross-section has pairs of parallel sides of different lengths such as 2 MM x 3MM to preclude the active aperture 133 from sliding onto the spindle end 128 until the spindle end 126 and active aperture 133 of the locking member are correctly angularly aligned. In this configuration of the exterior handle 8, an additional compressed compression spring is included to act independently on the locking bar; i.e. a compressed compression spring acts between the isolating member and cage base another, (of larger diameter than the isolating member 130) acts between the locking bar and cage base The handle assemblies described above are applicable to many types of locks that employ a separate latch bot assembly including locks described in PCT/AU20041000675, AU 614604 and 656896 which are hereby included by reference. Such latch bolt assemblies include an outwardly biased rectilinearly displaceable latch bolt (that may be deadlocking) supported within a substantially hollow cylindrical casing having an aperture for passage of the latch bolt and where rotation of an unlatching member causes the latch bolt to retract. The means by which the unlatching member/s is/are operably connected to the latch bolt is inconsequential to some inventions herein which are concerned with the means for locking and controlling the unlatching members.

LiTd WdE?:90 900? ZT -O02OaGO1 UI~b WN SS2S9896ET9 'ON EINOHd Aooi -iuaisnu woN_ ZL-Z.L-900Z ae( 00:81L (lW:H) aWu!L :e!lejlsnv dl Aq paAlaa ZZ6t79SO-IIg9S :ON (l SIqOO C 17 0 uHub Some forms of latch bolt assemblies (described below) are connected to the handle assemblies by a hub 3 including a hub casing comprising two shells riveted C'l together. Within the hub are two independent drive mechanisms as shown in Fig 9, 0' 5 positioned one on each side of the parallel plates 170 and connected to the drive shaft on fl the same side of said drive mechanisms, converting rotational lever movement into IND translation in a direction parallel to.that of latch bolt movement SReferring to Fig 9, one sees an exterior drive shaft 18 extending inwardly from C the exterior handle assembly 5 and an interior drive shaft 19 extending inwardly from the interior handle assembly 6, each drive shaft being coupled to an actuating member 41 and 42 respectively mounted within the hub 3 for angular displacement. Each actuating member and its coupled drive shaft angularly displace together; in some forms, the pivotal axii of the actuating members and unlatching members are coaxial; in some forms, each actuating member is coupled to its corresponding drive shaft by splined engagement comprising external splining on the drive members and interior splining on the actuating members; this adjustable engagement accommodating different distances between the handle assemblies resulting from different wing thicknesses.

Referring to Figure 9, one sees a hub 3 that is symmetrical about central plane to comprise a pair of mirror image hub halves the plane being parallel the face of the wing and equally spaced between the handle assemblies. For convenience, the exterior half will be described first, it including the actuating member 41 configured as a substantially laminar disc-like plate 43 having a V-shaped wedge 44 protruding inwardly from surface (orthogonally disposed to the axis of rotation of the drive shaft) and a substantially cylindrical boss 46 supported in a cylindrical aperture 48 in a side of the hub casing The hub may be configured so the axis defining the boss 46, the axis defining the cylindrical aperture 48 and the axii of rotation of the boss 46 and associated drive shaft are all coaxial. As stated above, the actuating member may include a splined aperture 47 to co-operate with the drive shaft to provide a splined joint.

The substantially laminar (and substantially V-shaped) V-shaped wedge 44 extends towards its pivotal axis from the periphery of the plate 43 to overlap the side walls of a profiled slot 49 in a slide plate 50; the profiled slot 49 (having in general, the shape of a two dimensional funnel and) having opposed profiled portions (defined herein as leadin 51 and lead-in 52): the side walls of each lead-in including a bearing surfaces 53 independently engageable with a side wall of the V-shaped wedge 44 to participate in cam-follower motion, The lock may be further configured so that in the undisplaced 8Td LdEE:90 900E ET -B0 Sd qq -98962T9 'ON 3NOHd Noo-i -iuaisn WOa-j lL-ZL-900O (P-n4-Ak) 842Q00:91.(w:H)aw ew l-isnR~jfl'dAq POA!OOO ZZ6tf990-Ifl8S :o0j CSiNqO

IND

01 disposition of the slide plate 50, the slide plate 50, profiled slot 49 and V-shaped wedge each comprise halves symmetrically disposed as mirror images about a plane with the Vshaped wedge in contact with both lead-in 51 and lead-in 52, in which case rotation of the 00 actuating member 41 in one direction causes one side of the V-shaped wedge 44 to act on the bearing surface of lead-in 51 and rotation in the other direction causes the V-shaped wedge 44 to act on the bearing surface of lead-in 51 in both cases to cause the slide 60 to N displace towards the bolt; in the configuration shown, the V-shaped wedge and bearing IN0 o surfaces cooperate in a substantially cam follower relationship characterized by some Cl relative slide movement.

The slide plate 50 comprise a substantially laminar member having opposed side surfaces parallel surface 45 is constrained for rectilinear movement in a direction parallel that of the latch bolt by a pair of parallel spaced rails 54 within the hub casing each defined by a plane parallel that of the surface 45. In a particular form, the rails 54 are configured to enable the hub casing to have a hub aperture 28 of conventional size, 54 MM Diameter. The slide plates 41 and 42 are biased against displacement by a pair of compressed compression springs 67 mhat act between shoulders of the slide plate and the inside wall of the hub casing 55 as shown- The surface 56 of the slide plate 50 adjacent to the latch bolt assembly 2, has a substantially T shaped raised portion having a rectangular portion 57 elongated in its direction of movement;, this rectangular portion 57 has a central elongated slot 58 through which the spindle 27 freely extends. The end of the rectangular portion 57 nearest the bolt, includes at least one and preferably opposed (that may be an upper and a lower) substantially opposed drive shoulders 80 end 61 defined by a surface orthogonal to the direction of slide and latch bolt movement- The opposite end of the rectangular portion 57 is connected to a laterally extending portion that includes one and preferably a pair of opposed drive shoulders 62 and 63 defined by a surface orthogonal to the direction of slide and latch bolt movement; and spaced from the slot 54. In usage, (one of) or pair of drive shoulders (the pairs comprising (60 and 62) and (61 and 63)] engage (one of) or (the) pair of driven pins 64 and 65 described below that project sideways from a slide 66 towming part of the latch bolt sub-assembly 2; the driven pins 64,65 in one form being defined by axii parallel to the axis of rotation of the drive shafts. In one handing of the wing, drive shoulders 60 and 62 engage the driven pins 64 and 65 respectively and in the other handing, drive shoulders 61 and 63 engage the driven pins 64 and 65 respectively.

The location of the drive shoulders 64,65 is such that linear movement of the slide plate STd LWdt':90 9001 ET BN- AO ]dafU WOl 5-.q _q%962T9 'ON EINOHJ moo-i -ibr jisnu woaj (P-V4-jj a;lc(00:21.(w:H) ew!j :eIlwlsnV diAq PaA~aOaU ZZ617199O-kN9S :OjNJ ci 00 0 Cltwrsteblt(nrsos orotation of thehe actuating member)i ihr ieto causdes helatc bolt i toe drercto. aallt otmvmn n oad h'ot toIAshostate aed tht hb 3oisytridcalbut cbentalusplane of mpiea parso o ~i whi(connected to sptheeexterior a unlatching member a thexriort dishaten 18)an a inero hupalicludin tyeoac int actatngmber 42 (connnFiuected to unleatchingtmembernd by the erior edrbive sihna 19)ua ecs incluin a lide plat 0 o rot o the atting membhefrinetrdrioncuig ld plate t8 yrvt 84cmrsn omei h sudirectipalleyincl to rotrumovmnt and tefoardste bolt.cue ixn ol atcigtshoe statedt thate on ustctinl decrnnibedaov isjtc bone of0 manyoways win hcanga displacee ftee an athigtember cand iartdpacementsitio apin btentelatch boltadacsn erwl 6)t retebl odslc oad h Axene particulanyedflc bolt assemblyn2 shown inoFigurest12 tol1 to dipaetwhic the haetrassmlidecied abi.Tecopesoe araical incue aom latch boi16 supportedaxly wlithne apubntal holwclnrcl6aig11cmriigtohleAhl oehrb a h reraivtc 80 t an cnetd by thfoned neincwting acrcua reces 81 in aal bacplael 182n rivepoted to the insid of8 theftpateend 83ug byrvth8 corsn formxednocrua spusal cyindpralle posionals1 of the rntpaten whicheinclude all iinroler18,ifo ratahingr theclnrclprin he assembly totedoiasusatal conninald latch bolth 60c supot itint asinan displaceable betwee anfll extended nd re rtracted prositon srng pabiinglaeans 164 (comprn. an copesnd spin 164 wnethin the caisiiocaed btweeasot8 n the latchfth bolt, and ai caigoeraln6)tod urg the otrases ton dislac toad the extteepoiiad bolt acuaing meanscabl tocause the bolt rtaedpstion displacemwards the OZd WdVE:90 900E ET -3aC1 Ogd Wt'?:9 900~IT *OQ £St983E~9 0N NOHd)10ldlfbWd ADo-i iu Lsnu wmtiA Z -ZL-90O&(P-rd-A) 0100:9L.(w:H) OWlllj i~sfl'dl Aq peAieoea ZZ617990-VJ9S:ON CI SVJOO

IND

02 Cl connecting arm. A pivotally displaceable locking arm 188, positioned adjacent the connecting arm within the bolt slot is also connected to the bolt by the pin joint, 00 The housing has a rear wall 165, comprised of a thin circular pinto 190 with Cl opposite tabsl 91 which project through a slot 193 in each half of. the latch bolt casing and which are bent over to assist retaining the two halves together while maintaining the wall in position. The wall includes an elongated slot 194 to accommodate the passage of the connecting arm and locking arm. At one end of the slot there is a first abutment 195 o engageable by a first shoulder 196 on the standard locking arm remote from the pivot Cl point.

A small cylinder 197 is slideably supported longitudinally in the bolt adjacent a compression spring 198 urges a locking arm orthogonal first extension 207 of the locking arm to pivot and hence urges the locking arm to pivot, such pivotal displacement disposing the first shoulder 190 on the locking arm towards the rear wall first abutment 195 which when engaged, deadlocks the latch bolt to restrain it from depression.

An auxiliary bolt 99 slidably supported adjacent the latch bolt is spring biased outwardly by spring 200 supported in an inner longitudinal channel 202 in the face of the auxiliary bolt adjacent the latch bolt. The auxiliary bolt facilitates inward displacement of the bolt by the strike plate during latching by retaining the locking armn first shoulder away from the first abutment. The auxiliary bolt during normal latching is uridepressed and under bias extends outwardly as far as permitted by a return rearward shoulder 203 which engages the rear of the latch bolt. This rear shoulder concurrently engages and depresses the first locking. arm extension against spring bias thereby ensuring that the locking arm first shoulder is away from the rear wall first abutment. Depression of the auxiliary bolt by the strike plate during latching causes the rearward shoulder 203 to disengage the first locking armn extension to allow the locking arm under spring bias to pivotally displace to dispose the first locking arm shoulder towards the rear wall first abutment.

The bolt is retracted by inward movement of the connecting arm but prior to displacement, the bolt, if deadlocked, must be unlocked and free to translate. This unlocking is achieved through a limited translational displacement of the connecting arm 166 relative to the latch bolt 160. The connecting arm pin joint 187 with the bolt significantly has an elongated slot 204 to facilitate the above mentioned small free movement. The connecting arm also has, slightly displaced from the slot and orthogonal to its general length, a return 205. The locking arm has an orthogonal second extension 206 on the opposite side of the pivot point from first extension. The small relative inward displacement of the locking arm causes the return 205 to engage and displace the TZd W8SE:90 9003 ET -3a(I WdS?:90~qqq~96T :00 'ON 3NOHd)lfl1LLlb Wd Noo-i iuaisnu wod-:i ZL-ZL-900Z (P-Id-A) alea 00:81. auW!L :e!lejisnv dl Aq paA!aoaH ZZ6tS79O-iI9Ss :ON (1 SNOO0 0 21 0 adjacent second extension 206 thereby causing the locking arm to pivotally displace to move the first locking arm shoulder away from the first abutment.

The latch bolt subassembly has two parallel spaced plates 170, extending 00 rearwardly from the bolt housing, in each spaced plate there is a circular hole 169 to o 5 support a minor shaft 168 passing between the circular holes 169 in the spaced plates it and supporting between them a pivotally displaceable crank 167, comprised of two arms Sseparated by a central slot. The above mentioned connecting arm 166 has pasage within o this slot and is secured by the pin joint at the outer end of the slot. Figure 14 shows a 0 particular construction of the crank 167 where a pair of planar arms are connected about a substantially cylindrical hollow boss portion by a rivets and where spacer discs are used as spacers to achieve a rigid part of correct dimensions.

The parallel plates 170 also have a pair of elongated parallel slots 173 having a principal direction parallel to latch bolt movement between which a slideable drive slide 66 is supported by driven pins 64 and 65 which pass from a slot in one plate to a slot in the other plate, protruding from each side to be engageable by one or more of the drive shoulders 60 to 63 of the a slide plate of the hub assembly.

The crank 167 has an axis of rotation co-axial with the axis of the drive shafts; on the one side of the pivot point it comprises an arm 211 which is engageable with the connecting arm to cause the bolt to retract. The engagement may comprise a return shoulder on the connecting arm projecting into the same plane as the arm of the crank but preferably it comprises a pin joint 212. On the opposite side of the pivot point from the arm, the crank has a counter pivoting arm 213 which is engageable by a shoulder 175 of the drive slide whereby the drive slide may engage and cause the counter pivoting arm to pivot forward thereby causing the arm of the crank to pivot backwards thereby displacing the connecting arm inwardly and causing the latch bolt to displace towards the retracted position. Although not essential, it is preferable as mentioned above that the crank and the connecting arm are pin jointed. It is also preferable that the bolt and connecting arm are pin jointed.

When installed in a door or the like, the above described bolt assembly is assembled to the hub assembly as shown in Fig 9, such that the parallel side walls (and components there between) are within the hollow hub casing and such that the pivotal axis 172 is coaxial with a horizontal hub axis that defines in part the hub assembly; this being coaxially with the axis of rotation of the unlatching members; and In this assembled state the side walls 170 are defined by planes that are parallel with the planes defining the E~d WJSe:90 900Z ZT "0;3( S£dS9896£T9 'ON BNOHd A30o iuaisnut WO8A ZL-ZI--9OZ (P-ri-A) ale(] 00:91 OWij :e!IeJlsnV d Aq pOAiaoGH ZZ6PV990-IV8s :Nc~j ciSINO 22 CA slides 50 supported within the hub casing and side walls are located between the slides of the hub.

00 The assembly is configured such that. if the actuating member is displaced in either c-i angular direction (from an undisplaced disposition) in response to the drive member being rotated (from a corresponding undisplaced position corresponding to an undisplaced 'fl unlatching member), a hub slide is driven towards the latch bolIt to simultaneously drive the IND slide forward to cause the crank and connecting arm to draw the latch bolt inwardly from o the fully extended position to a fully retracted position.

CA In one embodiment a lockset includes a pair of lever assemblies one of which has a clutch and the other includes a thumb-turn core, a latch bolt assembly having conventional half inch bolt and a hub assembly. This lock in usage, has a fully extended deadlocked bolt within a strike plate, the shoulder of the locking arm 196 is engaged with the shoulder of the rear wall 195, the slide is fully back and the auxiliary bolt is held inwardly by the strike plate and a lever is unlocked. In this configuration, the core lock may 1$ be displaced between locked and unlocked positions. Rotation of the lever causes the cam to rotate and displace the slide plate 49 which in turn causes the drive slide 66 to translate.

Shoulder 175 of the drive slide displaces forward to displace counter pivot arm 167 of the crank so that the pin joint 178 is drawn inwardly. The connecting arm moves fractionally to engage the arm of the locking member and a little further displacement pivots the shoulder of the arm out of engagement with the shoulder. Further displacement of the connecting arm draws the bolt inward while holding the locking member towards abutment. When the bolt has been fully retracted and the bolt moved out of engagement with the strike plate, the auxiliary bolt shoulder moves into engagement with the first extension arm of the locking arm.

In an improved form of the latch bolt assembly, shown in Fig 15, the latch bolt 240 is of extended length and when fully extended, protrudes a greater distance from the front plate 162. To facilitate latching, the longer latch bolt 240 is retained partly extended prior to latching by the shoulder 241 of a modified locking arm 242 engaging behind the shoulder 243 of the rear wall 165. In usage. after a wing is opened the latch bolt is held partly extended by the connecting arm 166 which in turn biases the shoulder 241 towards engagement with the shoulder 241 and when the shoulder 24.1 reaches shoulder 241 during is outward displacement, shoulders 24 1 and 243 engage to restrain the latch bolt.

When the latch bolt is then initially inwardly displaced during latching, the connecting arm by dint of slot 204 remains undisplaced while the locking arm is displaced; tis action allowing the spring 198 to cause the modified locking ar to displace away from Nd9l:90 900F ZI TIOaOadd~lU W SS2-S9896ET9 'ON FINOHd Noo-i -ibdisnu woNA ZL-ZL-900 ale0 00:9L aw!l:eilesnV dl Aq peA!aoa ZZ6t990-IVSS :ON 031 Sr0 23 CA engagement with shoulder 243 and to execute normal latching as described above. In some series of locks employing the same casing, the components are configured to 00 displace the latch bolt the extended length and the shorter conventional latch bolt is N" accommodated by having the drive slide just displace a shorter distance this evidenced 0 5 in Fig 15 by the small portion of unoccupied slot 246. In one form the improved locked latch bolt extends IThe multi-function handle assemblies, hub and latch bolt assembly together oprovide a lock that can be configured as a passage set [with the exterior and interior CA clutches in the unlocking configuration so the unlatching members may be operated] and as an entry lock where the exterior handle may be locked and unlocked by use of the locking member 116 and it may be configured as an exit lock where neither handle can be operated to unlock the wing [with the exterior clutch displaced to the locking configuration by locking member 116 and the interior clutch displaced to the locking configuration by interior core]. In one type of this lock, the lock can be unlocked from outside to gain entry but the exterior clutch is then returned to the locking configuration. Upon entry, the lock can be unlocked by use of the interior key and locking member 116.

rEd WdSE:90 900Z ?T oa SS2S989G2!T9 "ON 3NOHd Ao0i 7b~iiSnu woaA