5 IMPROVEMENTS IN LOCKS FIELD OF THE INVENTION 10 The present invention concerns locks for doors and the like, and improvements therein. BACKGROUND Key-in-handle locksets comprising key-in-knob and key-in-lever types are 15 used in large numbers in domestic, commercial and industrial applications. Such locksets typically have a bolt mechanism for installation within a door (also known as a door leaf) and one or two handle assemblies that are secured one to each door face, at least one handle including a key-operated cylinder secured therein. The, or each handle assembly comprises a handle - either a lever type or a knob 20 type - and a base (that in one form comprises a rose) that is fixed against the door and by which the handle is supported. One problem associated with many key-in-handle locksets (not including those employing a U.S. style interchangeable core characterized by a barrel of smaller diameter) is that any action that requires removal and/or installation of a 25 cylinder can be time consuming and may require a significant degree of skill as the handle assembly, after being dismantled from the door, must be disassembled to provide access to the cylinder and later re-assembled. These actions of disassembling and re-assembling, are required for re-pinning and/or for the installation of a new barrel in the cylinder, and for the substitution of some internal 30 parts to change lock functionality. Typically the handle is pivotally mounted in the base and other small components are secured within the base and/or handle; in some locksets some small components being employed to assist in the transmission of rotational handle displacement to cause rectilinear displacement of the bolt; in some locksets some small components being employed to assist in the locking of the lockset to prevent the bolt from being displaceable by the handle. It is desirable to make it easy to remove and/or install the cylinder of the locksets type described above so that a tradesperson or homeowner may be able 5 to remove (and replace) a cylinder enabling him to have the cylinder re-pinned remotely by a locksmith. Of course, the invention is also of benefit to a locksmith who can perform the task of re-pinning more quickly. The present invention addresses this problem, and in addition provides other advantages and embodies other inventions. 10 It should be noted that others have overcome the difficulty by use of a U.S. style cylinder comprising an interchangeable core characterized by a barrel of smaller diameter than those of the inventions subject of this specification; these interchangeable cores having limitations that preclude their use in some applications. 15 It should also be noted that common mortise locks (having a casing within the door) employ a cylinder that is retained attached to the casing by a screw that passes from the edge of the door to intersect the cylinder and the casing - these mortise locks being distinguished from locksets described above by the cylinder being fixed relative to the door and not displacing with the handle. 20 DEFINITIONS AND CONVENTIONS EMPLOYED Throughout this specification and claims which follow, unless the context requires otherwise, the word "comprise", or variations such as "comprises" or "comprising", will be understood to imply the inclusion of a stated integer or group 25 of integers but not the exclusion of any other integer or group of integers. Throughout this specification and claims which follow, unless the context requires otherwise, the positional prepositions such as rear, forward are used to assist in description of the preferred embodiments and with reference to the accompanying drawings and have in general no absolute significance. 30 Throughout this specification and claims which follow, unless the context requires otherwise, the word door embraces windows and other displaceable wings. Throughout this specification and claims which follow, unless the context requires otherwise: latching means displacement of a latch-bolt against biasing means by an engageable means (in one form comprising a strike plate) and subsequent displacement of the latch-bolt into engagement with the engageable means (in one form comprising an aperture of the strike plate) under the action of the biasing means; latch-bolt is an outwardly biased bolt capable of executing 5 latching; unlatching means withdrawal of the latch-bolt from engagement with the engageable means; unlatching handle (or handle) is a lever or knob that is hand operable to cause the latch-bolt to become disengaged: locking means configuring the lock to restrain it from becoming unlatched; deadlocking means means means to configure the lock to restrain the latch- bolt from being displaced from the 10 configuration that it assumes when engaged with the engageable means (in the case of a rectilinearly displaceable bolt, from a fully extended position. This describes inventions comprising improved complete key-in-handle locks and improvements for such locks transportable into other locks and locking devices without being limited to the complete locks described herein. 15 SUMMARY OF THE INVENTION According to the invention, there is a handle assembly for a lock mountable to a door or the like including a base and a hand operable handle supported by the base, the handle including a cylinder recess extending from an opening in the exposed surface of the handle of the handle assembly that provides for passage of 20 an operable cylinder to and from the cylinder recess, the handle assembly in normal usage being mounted to the door or the like with a key aperture of the cylinder exposed able to receive a key and the cylinder restrained within the cylinder recess by a removable fastener not accessible in normal usage. In some forms of the invention, the cylinder is operable to selectively 25 configure the handle assembly to either allow or disallow the handle to rotate. In some forms of the invention, the cylinder is assembled to the cylinder recess by being displaced through the opening in a direction parallel the handle pivotal axis. In some forms of the invention, as the fastener is released from the 30 cylinder, the cylinder is outwardly displaced. In some forms of the invention, the handle is angularly displaceable relative to the base, the fastener being accessible from the door facing side of the handle assembly to be actuated into and out of engagement with the cylinder. In some forms of the invention, there is a recess through which a tool for 4 actuating the fastener has passage. In some forms of the invention, at least one component within the handle assembly has an opening or aperture that is or can be aligned with the fastener. In some forms of the invention, there is multiple components each have an 5 opening or aperture that is or can be simultaneously aligned with the other said openings or apertures and the fastener. In some forms of the invention, the fastener is captive within the handle assembly when the cylinder is removed from the handle. In some forms of the invention, the handle assembly has a formation 10 adapted to limit access to the fastener through a gap between the handle and a side of the base. In some forms of the invention, the fastener is a threaded fastener that engages in a threaded portion of the cylinder. In some forms of the invention, the fastener during engagement and 15 disengagement with the cylinder rotates about an axis that is parallel to an axis of rotation of the handle. In some forms of the invention, disengagement of the fastener from the cylinder displaces the cylinder. In some forms of the invention, the cylinder comprises a first part 20 supporting the barrel and a second part including a threaded portion by which to receive the fastener. In some forms of the invention, there is an angularly displaceable drive member and wherein the handle is angularly displaceable, and wherein the lock includes a displaceable bolt, means for converting rotary movement of the drive 25 member into displacement of the bolt, wherein the bolt is displaceable by drive member rotation in response to handle rotation, the cylinder being operable by key to displace the lock between an unlocked configuration characterized by the bolt being displaceable in response to handle rotation, and a locked configuration characterized by the handle being unable to be operated to displace the bolt. 30 In some forms of the invention, the cylinder is operable to selectively configure the lock to either enable or to not enable the drive member to be rotated in response to handle rotation. In some forms of the invention, the cylinder includes an angularly displaceable barrel having aperture to receive a key and being angularly displaceable in response to key rotation, the handle assembly including clutch means displaceable by barrel rotation to lock and to unlock the handle assembly, said clutch means including a clutch cam connected to one of multiple types of a 5 clutch couplers, the lock being configurable by the use of alternative clutch couplers to provide alternative functionality so that the key can be removed in both the unlocked and rocked configuration of the clutch means, or only in the unlocked configuration of the clutch means, or only in the locked configuration of the clutch means. 10 In some forms of the invention, the clutch coupler is able to be passed through the opening in the handle to be assembled to the handle assembly. In some forms of the invention, either including a coupler comprising drive pins supported within drive recesses of the barrel connected to a coupling disc having drive shoulders or a barrel having drive shoulders, the clutch displaceable 15 in response to barrel rotation by dent of the drive shoulders meshing with and displacing the clutch coupler. In some forms of the invention, the cylinder housing for the barrel with the shoulders is identical to the cylinder housing for the barrel with drive recesses. In some forms of the invention, the handle is supported in a base to 20 comprise the handle assembly which includes clutch means displaceable by barrel rotation to lock and to unlock the lock, the clutch means including a clutch cam connected to one of multiple types of spindles, the handle assembly being configurable by the use of alternative spindles to provide alternative functionality. 25 In some forms of the invention, the spindle is able to be passed through the opening in the handle to be assembled to the handle assembly. In some forms of the invention, the spindle is connected to a hand operable thumb-turn in a second handle assembly, said thumb-turn being operable to displace the spindle to actuate the clutch between locked and unlocked 30 configurations. In some forms of the invention, the handle comprises a lever of a key in lever lockset. In some forms of the invention, the handle comprises a knob of a key in knob lockset.
6 in some forms of the invention, the base comprises either a rose or a back plate. In some forms of the invention, the cylinder can be removed without the need for the dismantling of the assembly and in some forms of the invention, the 5 bolt comprises an outwardly biased latch bolt In some forms of the invention, wherein the barrel has an un-displaced angular disposition enabling key removal. According to the invention, there is a handle assembly for a lock substantially as described herein with reference to and as illustrated in the 10 accompanying drawings. According to the invention, there is a method of manufacturing or selling or distributing handle assemblies, wherein the handle assembly can be held in stock or sold with the handle assembly complete except for one or some of the components comprising the cylinder, spindle and clutch coupling, the one, or some 15 of which being installed later when the requirements are known. DESCRIPTION OF THE FIGURES The preferred embodiment of the invention will be described by reference to the attached diagrams of which: Figure 1 is a view of part of a door fitted with a key-in-handle lockset of the 20 type to which the present invention is applicable; Figure 2 is a cross-section view of a handle assembly that includes a cylinder; the cross-section being in a vertical plane orthogonal to the face of the door and intersecting the pivotal axis of the handle. . Figure 3 is a cross-section view of an unlocked handle assembly that 25 includes a cylinder; the cross-section being in a horizontal plane orthogonal to the face of the door and intersecting the pivotal axis of the handle. Figure 4 is the handle assembly of Figure 3 in the locked configuration, Figure 5 is an exploded view of a handle assembly that includes a removable cylinder comprising a housing and either of two types of barrel and 30 corresponding internal small parts and an alternative removable cylinder comprising a two-part housing that also includes either of the two types of barrel. Figure 6 is an exploded view of a bolt mechanism that employs handle assemblies as described below with one casing sided omitted for convenience of description.
DETAILED DESCRIPTION OF PREFERRED EMBODIMENT Figure I shows a key-in-handle lockset 1 mounted to a door leaf 2. Lockset 1 has three main assemblies: a bolt mechanism 3 that mounts within door leaf 2, a and preferably a pair of handle/base assemblies 4 and 5, each mounted on a face 5 6 and 7 of the door leaf 2. Bolt mechanism 3 includes a sliding bolt 8 that is movable into and out of engagement with an aperture of a strike plate (not shown) or the like mounted to a door frame (not shown) to respectively prevent or permit movement of the door leaf 2 relative to the door frame in known manner. Bolt 8 is movable inwards responsively to rotary movement of either of handle 9 or 10 when 10 the lock 1 is unlocked. In one form, each handle/base assembly 4 and 5 is secured to the door by fasteners that engage in recesses in the door, in other forms the pair of handle assemblies is attached by fasteners 11 that extend through door leaf 2 to be received in bases 12 and 13 to hold bases 12 and 13 fixedly rigidly against faces 6 15 and 7 of door leaf 2. Handles 9 and 10 are joumalled in bases 12 and 13 respectively by means disclosed below to be angularly displaceable relative to the base. Secured within handle 9 is a cylinder 14, having therein a barrel 15 of conventional type. A key 16 is provided to operate the cylinder 14 to operate the lock, operation in some locks 20 comprising locking and unlocking the lock 1; locking in some locks comprising restraining the handle against rotation relative to its corresponding base. A common requirement for key-in-handle locks is the removal of the cylinder to a) change the pins in the cylinder, and b) to change the barrel. In many prior art locks (not shown) removal of the cylinder requires partial 25 or complete disassembly of the lever/base assembly and this is requires a skilled tradesperson - normally a locksmith and is often time-consuming procedure The handle/base assembly 4, in accordance with the present invention, allows removal of the cylinder 14 as shown in Fig 5, comparatively quickly and easily, without the need for disassembly of the rest of the handle/base assembly. 30 This is achieved by the cylinder recess (i.e. the recess within the handle that is occupied by the cylinder) extending to the surface of the handle to define an opening through which the cylinder can pass to be inserted into the cylinder recess. Apart from the ease of assembling the cylinder, other benefits flow from this capability that described below.
Figure 2 shows the handle assembly 4 of inventive lock 1 in cross-section. Handle 9 is mounted for pivoting movement within base 12 as follows. Opposing part-cylindrical extensions 20 of boss 21 of handle 9 are received in bore 22 formed in base 12 and are also received in bore 23 of a bush 24 supported by 5 cylindrical web 25 formed in base 12. A plate-like cross-member 26 is fixed relative to the part-cylindrical extensions 20 and is shaped to have stops for limiting the angular movement of the cross-member 26 to limit the angular movement of handle 9. The cross-member 26 is engaged with a return spring 37 to be biased towards an undisplaced position to bias lever 9 towards an undisplaced position; 10 cross-member 26 having an aperture 31 to provide passage for the part-cylindrical extensions 20. A circlip 27 engages in a recess in extensions 20 and bears against cross-member 26 to retain the handle within the base. Boss 21 has a face 32 that is retained closely adjacent to a face 33 of boss 12. Thus handle 9 is retained longitudinally in base 12 while free within limits to rotate therein about an axis of 15 rotation 28. Figure 2 also shows threaded holes 29 formed in bosses 30 in base 12 to receive through-bolts 11 and a fixed cover plate 34 that is retained in base 12 by screws (not shown in Figure 2) that engage in recesses 35. Cylinder 14 as shown in Fig 5, is received in a close-fitting cavity 36 in boss 21. 20 Key-in-handle locksets actually comprise a ranges of locksets characterized by different functionality - some locking, some non-locking, some unlocking when the lock executes latching. All these different forms of the same lockset range are comprised of a number of common components and some components unique to a particular form. A common form has an exterior handle assembly 4 where the 25 external handle 9 can be secured against displacement by operation of the exterior key 16. In this form, the control cam 41 of a rotary clutch mechanism 40 can be rotated by rotary motion of an exterior barrel 15 to cause a locking cross-member 48 that is operably coupled to the handle and supported orthogonally to the axis of rotation 28 of the lever 9 to longitudinally displace. The cross member has one and 30 preferably two radially extending arms 42 and 43 that protrude radially through the apertures 45 and 44 respectively in the boss 21 of lever 9; the apertures defining in part, the part cylindrical extensions. The cross member is displaceable from the locked configuration shown in Figure 4 where the arm 42 is within the slotted locking recess 46 within the underside base and where the arm 43 is within the 9 slotted locking recess 47 of the underside of the base to an unlocked configuration where the locking cross-member 48 is displaced from the recesses and is free to rotate relative to the base within limits set by the cross-member 26. The bolt mechanism 3 may be operated by the exterior handle 9 through an 5 operably interspaced angularly displaceable drive member 50 that in some forms of the invention (not shown), has sideways protruding wings that extend through the apertures 45 and 44 to connect the drive member and handle boss. However, in the locked configuration it is preferable that the drive member and handle be disconnected so that if the lever is forced to rotate, it can do so without causing the 10 bolt to retract. So in the preferred embodiment, the drive member 50 has slotted apertures 51 and 52 to accept portions 53 and 54 of the sideways extending arms 43 and 42 respectively and the lock is configured so that in the unlocked configuration, the locking cross-member is both free of the locking recesses as described above and within the slotted apertures 51 and 52 operably connecting 15 the locking cross-member to the drive member 50 and hence the handle to the drive member 50. The drive member 50 is restrained within and adjacent the base end of the clutch cam 41 by spring 66 that outwardly biases the drive member 50 and a retaining disc 65 that has an aperture through which the shaft portion of the drive member has passage, said retaining disc 65 being disposed on the cylinder 20 side of the cross-member 26 to be retained relative to the cross-mrnember 26 an unable to be displaced by the spring 66. The assembly is configured such that the lock can be locked and unlocked when the handle is in the undisplaced disposition. In other forms of the invention, the locking recesses 46 and 47 are omitted 25 and the handle is always free to rotate within limits but where in the unlocked configuration the movement is not translated to movement of the bolt 8 because the locking cross-member is not within the slotted apertures 51 and 52. The control cam 41, described above comprises a hollow cylindrical cup like member defined in part by a longitudinal axis coaxial with its axis of rotation 30 and the axis of rotation of the handle and comprising a peripheral sidewall 60 and a base 61 that has an axial rectangular aperture for meshing without free displacement with the spindle 68. The sidewall has opposed apertures 63 and 64 through which the radial arms 42 and 43 pass and the locking cross-member is biased by spring 62 towards the unlocked configuration. The apertures 63 and 64 10 include a locking edge comprising a substantially helical ramped portion that is on the underside (disposed towards the plate 34) of the locking cross-member. In the unlocked disposition of the control cam, the locking cross-member is adjacent one end of this locking edge (that end furthest from the base 61) and on rotation of the 5 control cam towards the locking configuration, the locking cross-member (restrained against rotation) slides up the locking edge against biasing from spring 62 to be moved towards the base 61. The locking edge in the fully locked configuration preferably comprises a plane orthogonal to the axis of rotation of the control member. 10 In the forms described above, the interior handle assembly 5 may include thumb-tum 69 (also called a locking lever of snib lever) that is connected by a spindle 68 to the exterior clutch control cam 41; the clutch being displaceable by the thumb-turn to cause the locking cross-member to displace between the locked and unlocked configurations. In some forms the spindle does not extend to be 15 connected to the thumb-turn. In forms of the above, it is a requirement to be able to rotate the key to displace the control cam 41 to unlock the lock and then to return the key to the undispaced position to enable key removal while leaving the control cam 41 in the displaced unlocked configuration. It will be appreciated that to do this, there must 20 be some free movement between the barrel 15 and the control cam 41. In other forms of the above, it is a requirement to be able to rotate the key to displace the control cam 41 to unlock the Jock but be unable to return the key to the key removal while leaving the control cam 41 in the displaced unlocked configuration i.e. only while the key is within the barrel, can the lock can be unlocked. It will be 25 appreciated that in this case there is no free movement between the barrel 15 and the control cam 41. The different functionality is often achieved through the use of different internal components and in many types of key-in-handle locks, the handle/base assembly must be disassembled to make the required change of internal parts. 30 Referring now to Figure 5, cylinder 14 is retained in boss 21 of lever 9 by a screw 70 that engages in a threaded hole 71 of cylinder 14. Screw 70 passes through an aperture in a web 72 formed in boss 21. Screw 70 preferably has a countersunk head 73, with a hexagonally shaped recess 74 that can accept an Allen key 75. Head 73 is flush with face 32 of boss 21 and closely adjacent to the II face 33 of base 12 so that while lever 9 is retained in place in base 12, screw 70 is captive in boss 21 of lever 9. When the Allen key 75 is placed into recess 74 and rotated to unscrew screw 70 from hole 71 of cylinder 14, the screw 70 is prevented by base 12 from 5 moving longitudinally, so instead, the cylinder 14 is in effect, jacked out of cavity 36 of the boss 21 in a direction parallel to axis 28. When it is required to reinstall the cylinder 14, the process is reversed: the cylinder 14 is entered into cavity 36 and screw 70 is rotated so that it threadably engages in hole 71 of cylinder 14 and where further rotation draws the cylinder further into the recess 36 to be tightened 10 it in place to complete the installation. As shown in Figure 5, the cylinder may comprise the figure-8-like cylinders or the two part cylinder comprising a first portion 77 that supports the barrel and internal pins and a second portion 78 that includes the tapped hole 71 and an aperture for receiving a portion 80 of the first portion that is bounded by an external 15 end 81 that when assembled into the recess 36 is external of the portion 80 restraining this portion and hence the cylinder first portion from being removeable from the recess 36. To provide access to the recess 74, there are access apertures and recesses that in the undisplaced position of the handle are axially aligned; there is 20 aperture BB in cross-member 26, recess 87 in the locking cross-member 48, recess 86 In Ihe bore of the base 12, recess 89 in the bush 24 and electively aperture 85 in the cover plate 34. In some forms of the invention, the aperture 85 in the cover plate is omitted to minimize tampering and in this case, the cover plate 34 alone must be removed to provide access to the axially aligned apertures and recesses 25 and the head of the fastener. The capability of removing the cylinder easily, provides the opportunity of moving small internal parts through the cylinder recess 36 to re-configure the lock. So the key-in-handle iockset is preferably further configured to be re-configurable by the substitution of small parts that are mounted between the cylinder and clutch 30 and that are of a size that they can pass through the cylinder recess 36. One such substitution relates to the provisionlomission of free displacement between the barrel 14 and the clutch 40 as shown in Fig 5 where alternative clutch couplings discs 90 and 91 each having axial rectangular aperture 92 to mesh with the spindle 68 to provide either no free displacement and free displacement 12 respectively between the clutch coupler and barrel. In this form there is a coupler comprising a coupling disc 93 connected to drive pins 94 that are accepted within opposed longitudinal recesses 95 in the interior end of the barrel to couple the coupling disc and barrel 15- The coupling disc has radially protruding drive arms 96 5 that locate between spaced drive shoulders 97 of the cJutch couplings 90 and 91, clutch coupling 91 having two spaced drive shoulders with space between these and the drive shoulders 96 and clutch coupling 90 having four spaced drive shoulders with little or no space between these and the drive shoulders 96. In alternative form, the barrel and coupler are combined in the form of a 10 barrel having at least one and preferably opposed drive shoulders 98 that couple with a clutch coupling 100 with free displacement or alternatively with clutch coupling 101 without substantial free displacement similarly as described above. All clutch couplings are connected without free displacement to the control cam 41 of the clutch by the spindle 68 and all and the spindle can be withdrawn 15 through the cylinder recess 36. In locksets employing the clutch couplers described above the free displacement provided by the clutch couplers 100 and 91 is configured to be substantially the same as the angular displacement required to displace the clutch cam 61 between locked and unlocked dispositions thus enabling the key to be 20 withdrawn when the clutch either locked or unlocked. When either clutch coupler 101 or 90 (having little or no free displacement between the drive shoulders 96 and clutch coupler) is connected to the clutch cam 61 at a fixed first disposition relative to the clutch cam 61, the key can only be withdrawn when the clutch cam is fully rotated to comprise a locked clutch; but when the clutch coupler is connected to 25 the clutch cam 61 at a disposition 90 degrees disposed the first disposition, the key can only be withdrawn when the clutch cam is undisplaced to comprise an unlocked clutch. The handle assemblies described above are applicable to many types of key in handle locks including locks employing the bolt assembly as shown in Figure 30 6 which will now be described in detail where: the bolt comprises an outwardly biased rectilinearly displaceable latch bolt 100 supported within a substantially hollow cylindrical casing 101 that is attached to a front plate 102 having an aperture 103 for passage of the latch bolt, the bolt 13 outwardly biased by compression spring 104 within the casing between the bolt and casing rear wall 105. The latch bait is connected by connecting arm 106 to an angularly displaceable crank 107 supported by an axle 108 that extends through the crank to 5 extend into circular apertures in parallel side walls 109 of the casing - these side walls protruding rearwardly from the cylindrical portion. The assembly is configured such that (in relation to the Fig 6) the latch bolt 100 is inwardly displaceable from a fully extended position where it protrudes from the front plate 102 by clockwise displacement of the crank. The assembly is further configured such that the parallel 10 sidewalls 109, spring and leading edge 116 of the bolt each lie in planes that are parallel and orthogonal to the pivotal axis of the crank 107. A slide 110 is also supported between the parallel side walls 109 and by pins 120 that extend through the slide to extend into elongated apertures 121 in the parallel side walls 109 of the casing - these apertures 121 (in relation to the Fig 6) 15 extending horizontally forward from a position adjacent the rear end of the parallel side walls 109. The slide 110 includes a drive shoulder 111 that is engageable with a driven shoulder 112 of a return leg 113 of the crank, said driven shoulder 112 being substantially on the opposite side of the crank pivotal axis 114 to the 20 connecting joint 115 linking the crank and connecting arm 106 and disposed from the crank pivotal axis 114 (as is the connecting joint 115). The slide is displaceable towards the bolt (in response to drive member 50 rotation as described below) to cause the crank 107 to rotate clockwise to draw the connecting arm 106 rearwardly. 25 When installed in a door or the like, the above described bolt assembly is assembled to a hub assembly 122 such that the parallel side walls (and components there between) are within the hollow hub casing 123 and such that the pivotal axis 114 is coaxial with a horizontal hub axis that defines in part the hub assembly. The hub assembly 122 includes one hub slide 124 for each handle 30 assembly each rectilinearly displaceable in a direction parallel the direction of displacement of the slide 110, each said slide including at least one and preferably two driving shoulders 125 that are engageable with the pin/pins 120 of the slide 110 which they horizontally overlap.
14 Adjacent the hub slide is an angularly displaceable hub cam 126 having an axis of rotation coaxial with the pivotal axis of the crank and defining the hub axis 127. The hub cam includes a cylindrical boss portion 128 that extends axially outwardly through circular apertures 129 in the hub casing to be supported by the 5 hub casing and to be engaged in splined engagement with shaft portions 130 of the drive member 50 that extends towards the hub assembly 122 - the shaft portion 130 being exteriorly profiled in spline form to mesh with internal spline form of the hub cam 126 so the two can mesh without (or very little) free rotational movement between them. The assembly is further configured such that the pivotal 10 axis 28 is also coaxial the pivotal axis 114. Hub cam 126 has (from a planar portion 132 orthogonal to the pivotal axis 127) a rearwardly disposed and inwardly projecting shoulder 134 that horizontally overlaps hub cam driven shoulders 135 disposed in mirror like fashion about a horizontal plane that intersects the pivotal axis 127. 15 The assembly is configured such that if the hub cam is displaced in either angular direction (from an undisplaced disposition) in response to the drive member 50 being rotated (from a corresponding undisplaced position corresponding to an undisplaced handle), the shoulder 134 engages one of either driven shoulders 135 to urge the hub slide 124 towards the latch bolt to 20 simultaneously drive the slide 110 forward to cause the crank and connecting arm to draw the latch bolt inwardly from the fully extended position to a fully retracted position corresponding to a handle displaced to the position it is restrained by a stop and a fully displaced hub slide 124 and a fully displaced slide 110. Where the lockset includes a pair of handle assemblies, there is on each 25 side of the parallel side walls 109 a corresponding hub cam 132 and hub slide 124 as described above. 30