AU2009202988B2

AU2009202988B2 - Locks

Info

Publication number: AU2009202988B2
Application number: AU2009202988A
Authority: AU
Inventors: Brendan George; Russell Watts
Original assignee: Allegion Australia Pty Ltd
Current assignee: Allegion Australia Pty Ltd
Priority date: 2008-07-25
Filing date: 2009-07-24
Publication date: 2015-06-25
Anticipated expiration: 2029-07-24
Also published as: AU2009202988A1

Abstract

Abstract A lock including an engaging member supported in a casing and displaceable between an operative position and a retracted position and having an intermediate position, operating means including a hand operable unlatching member operable to cause 5 the engaging member to displace from the operative configuration, deadlocking means including a deadlocking slide having a deadlocking configuration corresponding to which the engaging member is restrained in the operative configuration, means to restrain the engaging member in the intermediate position, said means 10 reconfigurable in response to displacement of the deadlocking slide towards the deadlocking configuration to release the engaging member to enable it to be displaced towards the operative position. A lock including an engaging member supported in a casing and displaceable 15 between an operative position and a retracted position and having an intermediate position, operating means including a hand operable unlatching member operable to cause the engaging member to displace from the operative configuration, deadlocking means including a deadlocking slide having a deadlocking configuration corresponding to which the engaging member is restrained in the operative 20 configuration, accelerating means to act on the engaging member in response to displacerrient of the deadlocking slide towards the deadlocking configuration to urge the engaging member towards the operative position, said accelerating means comprising an angularly displaceable rocker defined by a 25 pivotal axis and having a free end able to act on the engaging member, said rocker having an elongated intermediate edge over which a shoulder of the deadlocking slide acts to urge the free end outwardly.

Description

1 LOCKS SUMMARY According to one aspect of the invention, there is provided a lock including an engaging member supported in a casing and displaceable between an operative position and a retracted position and having an intermediate position, operating means including a hand operable unlatching member operable to cause the engaging member to displace from the operative configuration, deadlocking means including a deadlocking slide having a deadlocking configuration corresponding to which the engaging member is restrained in the operative configuration, means to restrain the engaging member in the intermediate position, said means reconfigurable in response to displacement of the deadlocking slide towards the deadlocking configuration to release the engaging member to enable it to be displaced towards the operative position. Preferably, the means to restrain the engaging member in the intermediate position comprises a counteracting auxiliary slide that is displaceable from the engaging member in response to displacement of the deadlocking slide towards the engaging member. Preferably, the auxiliary slide and deadlocking slide are operably connected with free movement by an interspaced rocker. Preferably, there is an accelerating means to act on the engaging member in response to displacement of the deadlocking slide towards the deadlocking configuration to urge the engaging member towards the operative position. Preferably, the accelerating means is able to act on the engaging member in response to displacement of the deadlocking slide to outwardly displace the engaging member further than it would otherwise could be displaced in response to the said displacement of the deadlocking slide. Preferably, the accelerating means comprises an angularly displaceable rocker defined by a pivotal axis and having a free end able to act on the engaging member, said rocker having an 2 elongated intermediate edge over which a shoulder of the deadlocking slide acts to urge the free end outwardly. According to another aspect of the invention, there is a lock including an engaging member supported in a casing and displaceable between an operative position and a retracted position and having an intermediate position, operating means including a hand operable unlatching member operable to cause the engaging member to displace from the operative configuration, deadlocking means including a deadlocking slide having a deadlocking configuration corresponding to which the engaging member is restrained in the operative configuration, accelerating means to act on the engaging member in response to displacement of the deadlocking slide towards the deadlocking configuration to urge the engaging member towards the operative position, said accelerating means comprising an angularly displaceable rocker defined by a pivotal axis and having a free end able to act on the engaging member, said rocker having an elongated intermediate edge over which a shoulder of the deadlocking slide acts to urge the free end outwardly. Preferably, there is a lock body comprising a casing, the engaging member, a front plate, the deadlocking slide, and an exterior unlatching lever, and a double cylinder operably associated with the deadlocking slide. Preferably, there is an unlatching cam and an unlatching rocker. Preferably, there is an angularly displaceable interior locking lever operably connected to the deadlocking slide. Preferably, the engaging member comprises a latch bolt. Preferably, the engaging member comprises a latch bolt configured to be removeable from the casing, said latch bolt angularly displaceable about an axis parallel its direction of movement to become disconnected from other members within the lock body.

3 Preferably, the engaging member comprises a latch bolt having a chamfered face intersected by spaced slotted substantially longitudinal apertures intersected by substantially orthogonal apertures configured to receive bosses of bearing members, said bearing members protruding from the chamfered face to provide bearing surfaces, said bearing members supported within the substantially longitudinal apertures by fasteners that extend through the bolt to extend into apertures in the bosses. The elements relating to the various aspects of the invention claimed within are identified within the specification as follows where unless the context requires otherwise, * "Looks" or variations such as "lock" will be understood to include complete locks for wings and improvements in locks for wings that are transportable into other locks and locking devices without being limited to the complete locks described herein. * "Comprise" or variations such as "comprises" or "comprising" will be understood to imply the inclusion of a stated integer or group of integers but not the exclusion of any other integer or group of integers. * Positional prepositions such as "rear" and "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 * "Overlap" and derivations such as "overlaps" implies at least in-part, occupying a same plane as. * "Meshes with" implies engaging with but without free movement in excess of working clearances -for example, meshing between an angularly displaceable shaft and a recess in an angularly displaceable pinion means that they both angularly displace together but the shaft may be able to displace longitudinally in relation to the pinion. " "Extent" will be understood to include area, form and shape. " Headings are included for convenience only and not to affect on interpretation. " "Preferably' or variations such as "prefer" does not imply that the form of an integer is restricted to that referred to as preferred, but implies adequate and if need be, able to adequately perform a function required by the invention.

4 * "Alternative" or variations such as alternatively does not imply that the form of an integer is less or more preferred but simply implies adequate and if need be, able to adequately perform a function required by the invention. a "Improvements" does not imply that the form of an integer is restricted to that 5 referred to as "improved", but implies an alternative form of the integer/s "well suited" to particular applications and if need be, able to adequately perform a function required by the invention. * 'Wing" or variations such as "wings" includes complete wings; improvements in and alternative forms of wing constructions transportable into other wings and other 10 structures without being limited to the wings described herein, and more particularly, wings embraces wings configured as "doors", "windows", "shutters", "screens" and gates, * "Structure" or variations such as "structures implies a man-made fabrication consisting of one or more members and embraces complete structures; improvements in and alternative forms of constructions without being limited to the wings and described 15 herein, structures more particularly embraces wings and more particularly wings configured as (or included in) doors, windows, window screens, gates and shutters, * "Member" is an identifiable entity having material form that may include one or more identifiable components. * "Material" includes elements, alloys, plastics and other substances. 20 * "Aperture" and "recess" embrace a hole that extends from a surface while "aperture" in some contexts implies a hole that extends between surfaces. * "Furniture" includes door furniture that includes a "handle assembly" that includes a handle supported by a base that together in one form comprise a disengaging handle supported by a back-plate or base; 25 * "Handle" includes a knob and lever; - "Disengaging Handle" (sometimes referred to as an unlatching member or lever) includes a lever or knob that is hand operable to cause an engaging member to become disengaged and/or retracted, * "Base" includes a Rose that may include a surface mounted member 30 having a recess on the underside and it includes a back plate, * "Back Plate" (or "back-plate") includes a surface mounted box-like member having a recess on the underside. * "Engaging Member" is a member displaceable into and out of engagement 5 with an "Engageable Means"; when in engagement, the engaging member is in an operative position or configuration and when removed from the said engagement, the engaging member is in an inoperative position or configuration. In many locks, (including locks employing a sliding latch bolt) the operative position corresponds with an engaging 5 member that is substantially fully displaced and the inoperative position corresponds with an engaging member that is substantially fully retracted; in this case the "engaging member' is displaceable between a fully displaced disposition and a fully retracted disposition. Within this specification, "retracted disposition" will embrace the inoperative disposition and fully displaced will embrace the operative disposition. 10 * "Engage" implies displacement of an "engaging member into engagement with an "engageable means". a Disengage" means withdrawal of the engaging member from engagement. * "Latching" implies displacement of an "engaging member" into engagement with an "engageable means" under the action of biasing means. 15 * "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 a plunger that is operably associated with a latch bolt. * "Unlatching" means withdrawal of the engaging member from engagement. 20 "Locking" means the act of configuring the lock to restrain it from being disengaged 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. ."Deadlocking" means to configure the lock to restrain the engaging member 2.5 from being displaced from the operative configuration by external forces (in the case of a common lock for a hinged door, it includes restraining the bolt in a fully extended position). The deadlocking means is some forms includes a "deadlocking slide" that is displaceable to cooperate with the engaging member to restrain it against displacement and/or to restrain an unlatching lever from being operable to unlatch the bolt. 30 "Deadlatching" means the bolt is automatically deadlocked during latching-. . "French door" means a door including a frame and a glass in-fill and "Common French Doors' comprises a hollow frame having a longitudinal recess having a depth and not exceeding 40MM, "Screen door" means a door including a hollow frame and an insect restraining 6 in-fill such as fiberglass mesh, woven mesh or perforated metal mesh; a conventional security door is defined by having an axial hollow having a Depth not exceeding 45 MM, a Width not exceeding 16 MM; an industry-standard door preparation has an elongated slotted aperture having a Width 14.5 to 16 MM and length substantially 147MM. 5 * "Lock Body" includes an engaging member and a lock casing and an Australian conventional security door lock is able to fit within an industry-standard door preparation and has a lock casing not exceeding 45 MM in depth, a width not exceeding 16 MM and preferably a length substantially 147 MM. * "Mortise Lock" means a lock including a lock body, a strike plate, a pair of 10 handle assemblies and a cylinder where the lock body is configured to be fitted within the frame of the wing. S"Cylinder" or "Single cylinder" means a substantially conventional lock cylinder comprising a separate sub-assembly that includes a key operable barrel within a cylinder housing. 15 "Double-Cylinder" comprises a substantially conventional double lock cylinder comprising a separate sub-assembly 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 and where in a 20 conventional double cylinder this radial distance is 15.0 MM. * "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. This type of cylinder is commonly used in security door locks in Australia to enable the cam to be displaced by 25 either barrel to a locking configuration and then the barrel to be reverse rotated to the undisplaced position enabling key removal while leaving the first cam in the looking position, S"Cross-Sectional View" in relation to figures should be interpreted as an orthogonal cross-sectional view defined by a plain orthogonal to the axis of the member in 30. consideration. 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. Unless the context requires otherwise, any prior publications and usage referred to 35 herein, is not an assertion that any of this material forms part of the common general * I1**J* JUl* Z4t ZUUi UB:14-I P9 7 knowledge in the art in any other country at the priority date of any claim herein (or the priority date of any future claimed derived at least in part from this specification). Where an integer is attributed with attributes different from those attributed in an earlier application on which this application relies for priority, the integer will be considered 5 to be the same integer in a different form; where there is actual inconsistency, the latest description will prevail; and where attributes, integers and/or features are described in summary, the description with 2005 250 050 will take precedence- this summarizationl following on from the wording "such integers and/or features in summary being" The integers described within relate to a) the various aspects of the invention 10 as claimed within, and b) the various aspects of other inventions as will be claimed in divisional applications derived at least in padt from this application. The inventions described within derive, at least in part, from those described in the associated parent application 2005 250 050 derived in part from 2004 250 982; the figures and description with these applications are hereby included in their entirity in this 15 application by reference. The inventions within may be used in conjunction with some of the locks described in 2005 250 050 and 2004 250 982 with minor adjustment; some of the inventions described within this application in effect, being improvements to some of the locks described In 2005 250 050 and 2004 250 982. 20 Description of the Figures Notwithstanding any other forms that may fall within the scope of this patent specification, one preferred form of the invention will now be described by way of example only with reference to the accompanying drawings in which: Fig I to 20 of 2005 250 050 are included by reference and are brought forward for 25 convenience Figure 21 is a schematic side view of a lock having an alternative bolt held partly retracted in-a pre-locked configuration. Figure 22 is a schematic side view of the lock of Fig 21, deadlocked, Figure 23 is a schematic isometric view of the lock of Fig 21 being removed from 30 the casing, Figure 24 is exploded views of the bolt of Fig 21. Figure 25 is an isometric view of a particular look including a driving deadlocking slide and a driving rocker, with the deadlocking slide in the undisplaced disposition. Figure 26 is the lock of Fig 25 with the deadlocking slide in the deadlocking 35 disposition.

- - -- --- I4 . CLL1tO .~-i r VJ 8 Description of Preferred Embodiments Notwithstanding any other forms that may fall within the scope of this patent specification, preferred forms of the inventions subject of this application will now be described by way of example only. 5 In summary, the inventions described herein provide looks for a displaceable wing 1 supported adjacent an opening 2 referencing Fig 1, where the wing has a losing edge 3 that in the closed position of the wing, is adjacent an element 4 that helps define the extent of the opening and the lock is mounted relative to this closing edge. The lock may include one or multiple integers and/or features (previously described 10 in 2005 250 050 and 2004 250 982) and these may electively be included (one or multiple integers and/or features) in the particular locks described below, such integers and/or features in summary being: * A lock body 5 mountable in a wing and may include a plate-like front plate 6 and an engaging member 7 that is displaceable to engage with an 15 engageable means 8 mounted relative to the element; in some forms, the lock is adapted to include an alternative reduced length front plate 9. In some forms the engageable means comprises a catch plate 8 having an engageable aperture 246. * A cylinder 121 and an interior locking lever 139 (also referred to as a Snib). * Where the engaging member 7 (that may comprise a bolt) is located below each 20 unlatching cam 101 described below; the bolt comprising (referencing Figs 15) a first bolt portion 28 that has passage through a rectangular bolt aperture 29 in the front plate and a return bolt portion 30 within the casing; the bolt aperture having a form corresponding to the cross-section of the bolt and providing working clearance between the bolt and bolt aperture 29. 25 & With reference to Fig 5, the bolt may include a longitudinally elongated support recess 31 having an opening 32 on the inside end of the bolt and a T member 34 comprising a vertical plate 35 that is supported in a slotted aperture 36 of the rear wall 33 and an orthogonal forward projecting guide pin 37 (that is preferably cylindrical) extends into the support recess to comprise a telescopic joint so that the 30 guide pin is able to support the bolt over its working range of dispositions - the bolt also being supported by the peripheral edges of the front plate bolt aperture 29 and the sides of the casing * An unlatching rocker 87 that in one form is angularly displaceable about a pivotal joint having a pivotal axis that is orthogonal to the sides of the casing and located 35 between the latch bolt the unlatching cam/s described below - it may be disposed 9 substantially midway between the front and rear sides of the casing referencing Fig 2. The pivotal joint may comprise a rocker shaft 333 that passes through an aperture in the unlatching rocker, the rocker shaft comprising a pinned extension of the casing or alternatively a metal rivet that passes through both sides of the 5 casing to both support the rocker relative to the sides and help retain the casing sides. The unlatching rocker 87 has a first rocker arm 88 extending upwardly from the pivotal joint to terminate in an engageable shoulder 89 and a second rocker arm 90 extending downwardly to overlap the return bolt portion to enable a sideways protruding drive pin 91 of the second arm to locate in a bolt drive recess 92 in a 10 side of the latch bolt. * Means to outwardly bias the respective latch bolts that may comprise a bolt torsion spring 98 supported around the unlatching rocker shaft 333 that has a free end 99 that acts on the second arm of the unlatching rocker to outwardly bias it and a fixed end 100 restrained by the casing and the substantially cylindrical body 15 of the torsion spring is supported about the shaft. Alternatively, a compression between the bolt and rear casing wall that acts directly on the bolt but to minimize the components types within the lock series it is preferable that all looks employ the torsion spring that acts on the unlatching rocker. * Operating means to displace the engaging member towards the fully retracted 20 disposition that may comprise an unlatching cam 101, referencing Fig 6, that is connected to a hand operable unlatching lever that may comprise an unlatching lever 109. The unlatching cam has a downwardly extending unlatching arm 102 that (towards its free end) has a driving shoulder 103 that is rearward of the rocker first arm and within the same plane such that forward displacement of 25 the driving shoulder (by downwards unlatching lever displacement) causes the first rocker arm to displace in a forward direction to cause the second rocker arm to rearwardly displace to cause the bolt to displace towards the retracted position. Referencing Fig 2, each unlatching cam may be supported by at least one sideways protruding cylindrical portion 104 that extends into a circular aperture 105 in a side 30 of the casing. This cylindrical portion also includes a portion of the unlatching'cam drive aperture 106 that mates with a drive shaft 107. * An unlatching cam 101, an exterior unlatching lever 108 and an interior unlatching lever 109 all connected by a shaft 107 that has passage through (while meshing with) the drive aperture 106 in the unlatching cam, referencing Fig 20) this shaft 35 also mating within a drive recesses 248 in each unlatching lever.

10 * A deadlocking slide that in one form comprises a rectilinearly displaceable deadlocking slide 110 located on the opposite side of the latch bolt to the unlatching cam described below, referencing Fig 2 and other figures, that is displaceable to and from a deadlocking configuration The location of the deadlocking slide on the 5 opposite side of the latch bolt to the unlatching rocker pivotal axis facilitating possible functional interaction between the lower end of the unlatching rocker and the leading end 111 of the deadlocking slide as described below. The deadlocking configuration may be characterized by the bolt and deadlocking slide cooperating to restrain the bolt from being displaced to the retracted position. 10 When participating in the deadlocking configuration, the deadlocking slide can be said to be in a deadlocking position. In the deadlocking slides of some of the various locks, an engaging shoulder 112 of a leading end 111 of the deadlocking slide is engageable behind an engageable shoulder 113 of the latch bolt to restrain it against inwards displacement - the engaging shoulder 112 being in the same 15 vertical plane as the engageable shoulder 113, a plane that is parallel a casing side. [Within the scope of this invention the deadlocking position comprises a limited range of deadlocking slide positions over which the bolt and deadlocking slide so cooperate and the invention embraces the bolt being within a limRited range of fully displaced positions over which the bolt and deadlocking slide cooperate and 20 from which the bolt is restrained against displacing]. Where the pre-latching mechanism comprises the second type the bolt recess 30A may be sufficiently deep to enable the deadlocking slide to displace across the back of the bolt Without contacting the protrusion 90A, but alternatively in the deadlocked configuration, the deadlocking slide may be rearwards of the protrusion 90A and in contact with it. 25 The deadlocking slide that may support an outwardly spring biased sideways displaceable ball 249 supported within a recess in the deadlocking slide, referencing Fig 2, to releasably restrain the deadlocking slide from leaving pre determined configurations; the ball being engageable in recesses 250 and 252 in a side of the casing that correspond respectively to an undisplaced deadlocking slide 30, 110, and a deadlocking slide in the first or second locked configuration (corresponding to which the lock is deadlocked) - in some forms, (in both locked configurations) the engaging shoulder of the deadlocking slide is behind the engageable shoulder of the bolt to deadlock the bolt or it may be configured to deadlock the lock as described below in relation to a ramping deadlocking slide.

11 The deadlocking slide may support a slide spring 134 to bias the fist cam arm against leaving the drive recess, in which case the position of the deadlocking slide in the second locked configuration can be substantially the same position as it is in the first locked configuration. 5 * Means to communicate displacement to the deadlocking slide to enable it to be displaced. In some embodiments, the means includes a first cam 148 having a first cam arm 149. Where the means comprises a substantially conventional separate double cylinder 121 assembly shown in the figures, the first cam 148 comprises a cylinder cam 122 and the first cam arm 149 comprises a cylinder cam arm 123 and 10 the deadlocking slide 110 includes a drive recess 133 (Fig 4) to accept and mesh with the cylinder cam arm 123 or first cam 149. *A hand operable locking member to displace the deadlocking slide that may comprise an interior rectilinearly displaceable hand operable member (not-shown) supported relative to the interior handle assembly that has passage through an 15 aperture in a side of the wing to be connected to the deadlocking slide. Preferably, the locking member comprises a hand operable angularly displaceable locking lever 139 (otherwise called a snib lever) referencing Fig 1, that is connected by a spindle 140 shown in Fig 8, (that has passage through an aperture in a side of the wing) to an angularly displaceable locking cam 141 within the casing referencing Fig 2. The 20 locking cam is supported by cylindrical portions 142 that extend into circular apertures 143 in the sides of the casing, referencing Fig 2 and has a spindle aperture 144 (Fig 7) to accept and mate with the spindle. The locking cam further includes a locking cam arm 145 having a displaceable free end portion that overlaps a portion of the deadlocking slide to couple the deadlocking slide and 25 locking. cam. In some forms, the free end portion has a sideways protruding pin 146 within a substantially horizontal slot 147 within the deadlocking slide to couple the deadlocking slide in a slide follower relationship. * A cylinder screw 155, referencing Fig 3 is employed to restrain a separate lock cylinder also preferably performs the function of restraining the first cam arm 30 against leaving the drive recess by displacing in a direction away from the bolt; * Means to operate at least one remote engaging member. This means include. a drive member 158, referencing Fig 2 and other figures, to operate at least one remote engaging member, the drive member being supported within the casing to be operably connected to each unlatching lever so that upwards displacement of an 35 unlatching lever causes the driver member to displace to actuate each remote -NaU . -Jul. 24 2009 08:16AM P14 12 engaging member to a fully displaced position where the remote engaging member comprises a bolt, this comprises an extended position where it protrudes from the wing. In some locks, upwards displacement causes the bolt to be driven to the fully displaced position (if in the case of latch bolts, it has not been displaced there by 5 the biasing means). Downwards unlatching lever displacement causes the driver member to actuate each remote engaging member from the fully displaced position while causing the bolt to retract, * An upper engaging member (not shown) operably connected to the driver member by an elongated upper drive member 159 and a lower engaging member (not 10 shown) operably connected to the driver member by a elongated lower drive member 160 referencing Fig 3. The driver member in some locks is connected directly to one or both elongated drive members and in other locks the driver member is operably connected to one or both drive members by one or a pair of interspaced drive slides supported within the casing. In some locks there is a pair of 15 counteracting drive slides (an upper and a lower) that are supported within.the lock casing and which are connected to the driver member. In one form, the driver member comprises an angularly displaceable driver annulus .161- having a base 162 and an annular sidewall 163 defined in part by a pivotal axis orthogonal to the plane of a casing side. The driver annulus 161 is preferably 20 supported within [and in some forms by] a raised casing annular wall 164 that completely or partly surrounds the drive annulus and in some forms, the driver annulus is supported by an axial cylindrical sideways protrusion of the base 162 comprising a pin 166 that locates within a substantially circular aperture 165 in a side of the casing to comprise a pivotal joint referencing Fig 5. 25 Upper and lower elongated drive members counteracting, a rearwardly disposed first joint 171 of the driver annulus 161 (Fig 5) is operably connected to the upper drive member 159 and a forwardly disposed second joint 172 (Fig 3) is operably connected to the lower drive member 160. The first and second pivotal joints in one form comprise pin joints (and herein the terms are used synonymously) comprising 30 a pin extending sideways from one member to locate within the other member or a pin that extends from within apertures in each member to be relatively displaceable to at least one, importantly the first and second joints accommodate relative angular displacement. The term pin herein embraces a substantially right-angled return portion of a drive slide or drive member within an aperture of the connected part.

- - h--- : e :1/M P15 13 In other forms, (not shown) the joints comprise a sideways protruding pin of the driver annulus that extend into a substantially horizontal slot of rectilinearly displaceable cooperating member to connect the two in a slide follower relationship. 0 A driver annulus 161 connected to the upper elongated drive member 159 by an 5 upper drive slide 173 that at one end cooperates in the first joint 171 and operably connected by a second joint 172 to the lower elongated drive member 160 by a lower drive slide 174. * A driver annulus 161 and each unlatching cam 101 closely disposed (to require Less space within the casing and for other reasons) and their respective pivotal axil 10 are closely disposed. In some locks, the cylindrical portion of each unlatch ing cam 101 that is supported in an aperture 105 in a casing side is within a radius that in part defines the driver annulus 161. In some locks, each unlatching cam cylindrical portion 104 is within the driver annulus side-wall 163. When the active unlatching lever is displaced downwardly, the drive arm 178 displaces the unlocking shoulder 15 176 upwardly to displace the remote engaging members from the fully displaced position, during which displacement the unlatching rocker 87 is displaced to displace the latch bolt to the retracted position - with a fully retracted-latch bolt corresponding to an undisplaced driver member. A lower drive slide 174 disposed rearwardly of the casing to comprise a vertIcally 20 elongated, substantially rectilinearly displaceable drive slide referencing Fig 3, and in some forms comprises a substantially cylindrical rigid or semi-rigid member. The second joint (Fig 4) is connected by an angled intermediate member 179 to an intermediate rocker 180 by a pin joint 181, the intermediate rocker 180 extending from a pivotal joint 182 shared with the casing and located adjacent the front plate 25 to its free end 183 disposed rearwardly of the casing. The free end also shards a pin joint 184 with the rearwardly disposed lower drive slide 174 that extends from the pin joint 184 towards the lower end of the casing The intermediate rocker 180 and intermediate member each have a pivotal axis orthogonal to a side of the casing. 30 *Operation such that, in normal usage, rotation of the driver annulus 161 in a locking direction by lifting the free end of an unlatching lever 109 or 108 drives the upper drive slide 173 upwardly to displace the upper drive member 159 upwardly and drives the lower drive slide 174 downwardly by causing the intermediate member 179 to pull the intermediate rocker 180 downwardly to displace the lower drive 35 member 160 downwardly. Preferably the upper drive member 159 and lower drive 14 member 160 displace simultaneously in opposite directions and in forms of the invention, the total displacement of each is identical (although at any intermediate position this may not be so) - the lengths of the intermediate member, the length of the intermediate rocker and the location of the joints being configured to provide 5 such. Rotation of the driver annulus 161 in an unlocking direction by lowering the free end of an unlatching lever 108 or 109 displaces the lower drive slide upwardly. * A driver ahnulus 161 in some embodiments is further configured to include a secondary driving shoulder 185 (Fig 2) of the driver annulus 161 and a secondary driven shoulder 186 (Fig 2) of the unlatching rocker 87 configured such that as the 10 driver annulus 161 is displaced in a locking direction, the secondary driving shoulder 185 can engage the secondary driven shoulder 186 (if it is so disposed) to displace the secondary driven shoulder 186 in a forward direction to outwardly displace the bolt The components are configured such that the secondary driving shoulder of a fully displaced driver annulus abuts the secondary driven shoulder of 15 an unlatching rocker that corresponds to a fully (outwardly) displaced bolt. This functionality described immediately above is particularly applicable to locks for doors having seals where the door is restrained from properly closing by the seal. * In s6me locks, referencing Fig 5, the deadlocking slide 110 is connected to a vertically elongated blade like driver locking slide 187 by a pin joint 188 comprising 20 an aperture in the slide and a protruding cylindrical pin of the deadlocking slide foot 119. The driver locking slide 187 has disposed from the aperture a stop shoulder 190 that is displaceable into a circumferential driver locking recess 191 of the driver annulus 161 to restrain it from being displaced from the fully displaced position. In some locks, there is also a circumferential subsidiary locking recess 192 of 25 the driver annulus that is utilized to restrain it from being displaced from the undisplaced position. It should be understood that the locking provided by the driver locking slide is additional to the locking provided by the deadlocking slide cooperating with the bolt as described above. * In forms of the invention, the first and second joints 171 and 172 are equidistance 30. (at a radius r) from the driver annulus 161 pivotal axis and on substantially opposite sides of the pivotal axis and the first joint 171 and the annular driver 161 pivotal axis are in the same horizontal plane when the driver is angularly disposed half way between the undisplaced and fully displaced positions. The lower drive slide 174 extends vertically downwardly within a casing channel 193 along the inside rear 36 casing wall of the casing and the upper drive slide 173 extends upwardly along an 15 inside edge of the casing. At the lower and upper ends respectively each drive slide 174 and 173 includes a dog leg portion 194 that extends to a tail portion 195 having a longitudinal axis that is substantially midway between the casing sides. The tail. supports a substantially cylindrical fitting 196, shown in Fig 4, having a slot 197 in a 5 head 198, the cylindrical portion being externally threading 199 so that it can receive and mate with an internally threaded end 200 of the associated drive member. The fitting has a longitudinally elongated aperture 201 and a cone portion through which the tail 195 extends to be crimped to retain the fitting 196 on the tail 195. The slot.197 receives the orthogonal portion of the dog-leg 194 to restrain the 10 fitting against rotation Provision for operating remote locks, it will be appreciated that they may not, and need not, always be employed with the locks described above as the locks operate quite satisfactorily without remote locks - for this reason it can be.said that the remote locks or remote engaging members are operably connectable to the driver 15 (and lock) because they can be connected when so desired. In the context of this specification, a remote lock or remote engaging means comprises a remote engaging member that embraces a simple plunger like member, each said remote engaging member being connectable directly or indirectly to a vertically elongated drive member that is connectable to a drive slide or to the driver annulus and they 20 include more sophisticated device where a remote engaging member is actuated by an intermediate mechanism that in some cases includes a remote lock casing and in some cases includes means for separately deadlocking the remote engaging member and where independent deadlocking is effected by displacement of the driver annulus. The fully displaced configuration of a remote engaging means is that 25 in which it acts to restrain the wing in which it is supported and in the case of a plunger-like member it is the extended position where it protrudes from the wing. The integers described above are configurable to have any, some or all of the following integers, features or attributes: * the upper and lower drive memberseach displace15 MM 30 e the bolt when fully extended protrudes 16 MM from the front plate * the bo)lt has a width of 12. MM * the lock body has a width of 15.5 MM * the backset is 30 MM * the casing depth is 40 MM 35 - the unlatching levers rotate less than 40 degrees to unlatch 16 0 the distance between cylinder and unlatching lever axii of 85 MM * the bolt is in the middle of the front plate - the front plate is interchangeable = the control rocker interchangeable 5 * the backset can be changed by the addition of spacers * the casing length does not greatly exceed 155 MM * the bolt is rectilinearly displaceable Particular locks employing some of the integers and features described in 2005 250 050 and 2004 250 982 include all the integers, features or attributes 10 below: * a lock body 5 comprising a casing 12 * front plate 6, - a latch bolt, a deadlocking slide 110, 15 * at least one unlatching cam 103, - an unlatching rocker 87, * handle sets including an interior 109 and an exterior unlatching lever 108 each connected by the single shaft 107, and an angularly displaceable interior locking lever 139 connected to a locking cam 141 20 by a spindle 140, and * a free-rotation-double cylinder 120 having a first cam 148 and cylinder screw 155 enabling the lock to be characterized by a first and a second locked configuration, a- driver annulus 161 These particular locks (and other locks described in 2005250050 and 2004250982 25 and other looks in general that have a bolt that is retained in a partly extended pre-latching configuration) may include an auxiliary slide (that in some cases replaces an auxiliary bolt described in 2005250050 and 2004 250 982). The auxiliary slide 320 (in some forms) being. elongated and having a leading end 321 that is able to occupy a space in front of a sideways extending shoulder 322 of the latch bolt to restrain the latch bolt against outward 30 displacement The auxiliary slide 320 is biased by compressed compression spring 323 towards the latch bolt; it has a drive recess 324 occupied by an ann 325 of a rocker 326 supported about a shaft 327 supported relative to the casing and located between the deadlocking slide and auxiliary slide; the rocker 326 having an arm 328 (substantially I LJt IL. oJ~,coo.r.....?Jul. eC'4 CWW=1 U10. .L I'I r±11 17 opposed to the leading end 321) that is engageable by a shoulder 330 of the deadlocking slide. These features are configured such that when the deadlocking slide is undisplaced, the auxiliary slide 320 is free to be displaced by the spring to engage shoulder 322 but 5 initial displacement of the deadlocking slide towards the deadlocking position causes shoulder 330 to engage the arm 328 to rotate the rocker 326 to cause shoulder 325 to displace in the opposite direction to urge shoulder 330 to displace the auxiliary slide away from the latch bolt, to free the latch bolt enabling the latch bolt to be displaced to the fully extended position. Further displacement of the deadlocking slide causes the arm 328 to 10 slide along the adjacent face 333 of the deadlocking slide without further causing the rocker 326 to displace- As the deadlocking slide is displaced to the undisplaced position, the rocker displaces to abut shoulder 330 while the leading end 321 moves to abut the side 334 of the latch bolt; when the latch bolt is retracted, the leading end 321 displaces to overlap the shoulder 322 to retain the latch bolt partly extended (prior to deadlocking). 15 The particular locks described above (and other locks in general that include a deadlocking slide) may include a deadlocking slide adapted to interact with an accelerator 402 configured to act on an orthogonal surface 406 of the bolt and in some locks to enable the deadlocking slide to outwardly displace a bolt further than it would otherwise be able to do so), (and in some cases to do so to ensure the bolt is fully displaced prior to or during 20 deadlocking), In some forms, the accelerator 402 is supported at one end about a pivotal axis 403 defined by a substantially cylindrical pin 404 fixed relative to (and orthogonal to a side of) the casing; the pin located between the front of the casing and a driving shoulder 405 of the deadlocking slide. The accelerator 402 includes a profiled driven edge 408 upon 25 which the driving shoulder 405 of the deadlocking slide acts to rotate the drive rocker 402 and to displace its free end 410 towards the front 409 of the casing; the free end may be configured as a foot 414 having a relatively protruding toe 415 that extends to be the only portion of the accelerator that engages the surface 406 of bolt. These features are configured such that when the deadlocking slide is undisplaced and the latch bolt is being 30 restrained by the auxiliary slide: * the latch bolt is free to displace inwardly past the free end 410 of the drive rocker since the free end is removed from the bolt's locus of displacement, * the driving shoulder 405 abuts an edge portion 411 of the driven edge 408 closely disposed towards the pivotal axis 403, 18 These features in some forms are further configured such that when the deadlocking slide has been displaced into the deadlocking configuration and the latch bolt is fully extended (referencing Fig 26) some or all of the conditions below are apply * the latch bolt is held against displacement by the toe 415 being behind the surface 5 406 the driving shoulder 405 is behind the driven edge 408 - * the driving shoulder 405 abuts an substantially orthogonal edge portion 416 further disposed from the pivotal axis than edge portion 411 and substantially orthogonal to the direction of deadlocking slide displacement; so that a force urging the edge 416 10 towards the driving shoulder 405 will not result in a force on the deadlocking having a direction parallel to its direction of displacement. These features may be further configured such that some or all of the conditions below are apply e edge portions 411 and 416 may be connected by a substantially straight edge 15 portion or by a profiled portion (as shown) that initially is less inclined (in relation to its disposition in Fig 26) than would a straight edge be to cause early deadlocking slide displacement to cause the toe to be able to exert a greater force of the surface 406 than would derive from a straight edge. * the driving shoulder 405 (when the latch bolt is being restrained by the auxiliary 20 slide) of Fig 25, is adjacent to an outwardly protruding accelerator shoulder 412 disposed a little further from the pivotal axis 403 than the inner end 411 so that the very initial displacement of the deadlocking slide causes the driven edge 408 (and hence drive rocker) to initially displace more rapidly towards the front 409 than it otherwise would be the case so that the toe 415 is brought more rapidly into contact with the shoulder 406. 25 * displacement of the deadlocking slide from the undisplaced configuration referencing Fig 25 to deadlocking configuration referencing Fig 26, causing the latch bolt to be driven from the partly extended pre-latching configuration, referencing Fig 21 to the operative position referencing Fig 22. The particular locks described above (and other locks in general) may employ an 30 alternative latch bolt 300 having a chamfered face 301 (that during latching slides up the edge or a wing of a strike plate) connected to a first portion 302 that includes the aperture 92. As described in relation to latch bolt 7, the shaft 37 extends Into the aperture 92 to form a telescopic joint. The face 301 in some forms is intersected by one and preferably spaced slotted apertures 310 that may be intersected by apertures 316 35 configured to receive bosses 312 of bearing members 314 that occupy the recesses 310 19 to protrude from the face 301 to slide along the strike plate during latching and in some applications, to slide over the doorjamb supporting the wing. Bosses may include apertures 311 to receive and engage with fasteners 313 that extend from surface 306 of the bolt to extend through lateral apertures 309 in the first bolt to extend into apertures 311 5 to retain the respective bearing member within the respective. slot 316. These particular locks (and other locks described in 2005250050 and 2004250982 and other locks in general that have a bolt that is acted on by a member having a protrusion 91 that extends into a drive recess 92 of the bolt) may include a bolt, referencing Fig 23, adapted to be removed from the protrusion to be removeable from the casing. -In 10 some forms, the bolt is angularly displaceable about its direction of displacement as shown, this being made possible in-part by the omission of a sector 317 of bolt material.

Claims

1. A lock including an engaging member supported in a casing and displaceable between an operative position and a retracted position and having an intermediate position, operating means including a hand operable unlatching member operable to cause the engaging member to displace from the operative configuration, deadlocking means including a deadlocking slide having a deadlocking configuration corresponding to which the engaging member is restrained in the operative configuration, means to restrain the engaging member in the intermediate position, said means reconfigurable in response to displacement of the deadlocking slide towards the deadlocking configuration to release the engaging member to enable it to be displaced towards the operative position.

2. A lock according to Claim 1, wherein the means to restrain the engaging member in the intermediate position comprises a counteracting auxiliary slide that is displaceable from the engaging member in response to displacement of the deadlocking slide towards the engaging member.

3. A lock according to Claim 2, wherein the auxiliary slide and deadlocking slide are operably connected with free movement by an interspaced rocker.

4. A lock according to any one of the above claims, including an accelerating means to act on the engaging member in response to displacement of the deadlocking slide towards the deadlocking configuration to urge the engaging member towards the operative position.

5. A lock according to Claim 4, wherein the accelerating means is able to act on the engaging member in response to displacement of the deadlocking slide to outwardly displace the engaging member further than it would otherwise could be displaced in response to the said displacement of the deadlocking slide.

6. A lock according to Claim 5, wherein the accelerating means comprises an angularly displaceable rocker defined by a pivotal axis and having a free end able to act on the engaging member, said rocker having an elongated intermediate edge over which a shoulder of the deadlocking slide acts to urge the free end outwardly. 21

7. A lock according to any one of the above claims including a lock body comprising a casing, the engaging member, a front plate, the deadlocking slide, and an exterior unlatching lever, and a a double cylinder operably associated with the deadlocking slide.

8. A lock according to Claim 7, including an unlatching cam and an unlatching rocker.

9. A lock according to Claim 8, including an angularly displaceable interior locking lever operably connected to the deadlocking slide.

10. A lock according to any one of the above claims, wherein the engaging member comprises a latch bolt.

11. A lock according to any one of the above claims, wherein the engaging member comprises a latch bolt configured to be removeable from the casing, said latch bolt angularly displaceable about an axis parallel its direction of movement to become disconnected from other members within the lock body.

12. A lock according to any one of the above claims, wherein the engaging member comprises a latch bolt having a chamfered face intersected by spaced slotted substantially longitudinal apertures intersected by substantially orthogonal apertures configured to receive bosses of bearing members said bearing members protruding from the chamfered face to provide bearing surfaces, said bearing members supported within the substantially longitudinal apertures by fasteners that extend through the bolt to extend into apertures in the bosses.

13. A lock substantially as described herein with reference to and as illustrated in Figures 21 to 26 of the drawings. Austral Lock Pty Ltd Patent Attorneys for the Applicant SPRUSON & FERGUSON