AU2650101A - Door lock - Google Patents

Description

AUSTRALIA

Patents Act 1990 COMPLETE SPECIFICATION STANDARD PATENT Applicant(s): CDS WORLDWIDE PTY LTD A.C.N. 087 107 499 Invention Title: DOOR LOCK The following statement is a full description of this invention, including the best method of performing it known to me/us: 2 DOOR LOCK This invention relates to a door lock and, in particular, but not exclusively, to an electronic deadlock type door lock.

Door locks, and in particular deadlocks, are generally mechanical in nature and installed in a door by forming a recess in the door or mounting a plate on the door and then installing the lock in the recess or on the plate. The installation procedure generally requires the lock to be assembled in order to mount the lock to the door and the assembly step increases the complexity of the operation and can make it difficult for people other than specialist to properly install the door lock.

A first aspect of the invention provides a door lock including; a lock body including a locking mechanism; a lock element locatable in a locked position or an open position by the locking mechanism, and for engaging a co-operating lock element on a door frame; and wherein the door lock is formed as a unitary body for location in a recess of a door without the need to assemble 25 the door lock in order to install the door lock in the recess of the door.

Thus, according to this aspect of the invention, because the lock is formed as the unitary body and can be mounted without the need for assembly, the lock is easy to install by simply forming the recess in the door and attaching the lock by, for example, screws or the like to the door.

Preferably the lock body includes a first flange for resisting movement of the door from a closed position of the door to an open position of the door, relative to the lock body. This preferred aspect of the invention prevents H:\paulad\Keep\speci\CDS WORLDWIDE PTY LTD Door Lock.-CAP-doc.doc 13/03/01 3 the door from being forced open by applying a force to the door (from the outside) when the door is in the closed and locked position by, for example, attempting to kick the door in so as to break the lock from the door.

Preferably the flange is formed on a lug which extends outwardly of the lock body.

Preferably the lock body includes a front face having an integral peripheral flange which resists movement of the door relative to the lock body in the closing direction of the door. The second flange resists an attempt to break the lock by applying force to the door from the outside.

Preferably the lock includes two lugs, each lug carrying a first flange.

Preferably the first flange is locatable in a groove formed in the door so that a portion of the door is sandwiched between the first and second flanges. However, in another embodiment the first flange may be abutted behind the door so the entirety of the door is sandwiched between the first and second flanges.

Another aspect of the invention is concerned with strengthening the lock when installed in the door to resist attempts to force open the door by kicking in the door or :the like.

A further aspect of the invention may be said to reside in a door lock including; a lock body including a lock mechanism; a lock element locatable in a locking position or an openable position by the locking mechanism, and engagable with a co-operating lock element on a door frame; a first flange formed on the lock body for resisting movement of the door relative to the lock body if H:\paulad\Keep\speci\CDS WORLDWIDE PTY LTD Door Lock.-CAP-doc.doc 13/03/01 4 an attempt is made to move the door relative to the lock body from the closed position of the door to an open position of the door.

Thus, according to this aspect of the invention the flange on the lock body resists attempts to kick in the door from outside the building which is closed by the door, because when the door is locked the lock body is effectively held stationary by engagement of the lock element with the cooperating lock element. Any attempt to kick the door in, and therefore move the door relative to the lock which would normally break the door from the lock, will be resisted by the flange on the lock body thereby reinforcing the door against attempts to break in by forcing the door relative to the door lock.

Preferably the first flange is formed on a lug which extends outwardly of the lock body.

o o Preferably the lock body includes a front face having an integral peripheral second flange which resists movement of the door relative to the lock body in the closing direction of the door. The second flange resists an attempt to break e* the lock by applying force from the interior of the 0 25 building.

Preferably the lock includes two lugs, each lug carrying a lee first flange.

Preferably the first flange is locatable in a groove formed in the door so that a portion of the door is sandwiched between the first and second flanges. However, in another embodiment the first flange may be abutted behind the door so the entire thickness of the door is sandwiched between the first and second flanges.

A further aspect of the invention is concerned with the H:\paulad\Keep\speci\CDS WORLDWIDE PTY LTD Door Lock.-CAP-doc.doc 13/03/01 5 manner in which a lock element engages a catch to secure a door in the locked position and selectively allow unlocking of the door.

The invention may also be said to reside in a door lock and lock catch combination, including; a rotary lock element on the door lock, the rotary lock element having a plurality of radially extending rounded spokes; a lock catch element for co-operating with the rotary lock element, the catch element including a cavity for receiving the rotary lock element, the cavity having a surface portion for engaging one of the rounded spokes and causing rotation of the rotary lock element, and a recess communicating with the cavity so that the rotary lock element rotates as it moves into the cavity to locate one of the rounded spokes in the recess to thereby lock the ~rotary lock element to the catch element to place the door lock and catch element in a closed condition; a locking mechanism for allowing rotation of the locking element in a first direction so that the locking element can rotate into the cavity in the catch element, and selectively preventing rotation of the lock element in 0e a reversed direction to prevent the lock element from rotating out of the cavity and placing the lock in a locked condition; and a lock release mechanism for releasing the locking mechanism to allow rotation of the rotary lock element in the reverse direction so that the rotary lock element can rotate out the cavity so as to unlock the rotary lock element from the catch element.

Preferably the rotatory lock element carries a ratchet wheel and the lock mechanism includes a lock tooth for engaging the ratchet wheel to allow rotation of the ratchet wheel and therefore the rotary lock element in the first direction but preventing rotation of the ratchet wheel and H:\paulad\Keep\speci\CDS WORLDWIDE PTY LTD Door Lock.-CAP-doc.doc 13/03/01 6 the rotary lock element in the reverse direction.

Preferably the tooth is located on a locking plate and biasing means is provided for biasing the locking plate into a first position where the tooth engages the ratchet wheel.

Preferably drive means is provided for driving the tooth from the position engaging the ratchet wheel to a position released from the ratchet wheel to enable the ratchet wheel and therefore the rotary locking element to rotate in the reverse direction.

Preferably the drive means comprises an electric motor for rotating an eccentric, the eccentric engaging the plate to move the plate against the bias of the biasing means to a second position in which the tooth is removed from the ratchet wheel.

Preferably sensing means are provided for sensing whether the plate and therefore the tooth is in the first position engaged with the ratchet wheel or the second position Sremoved from the ratchet wheel.

Preferably actuating means is provided for receiving a key, so that when a valid key is presented to the actuating means, the actuating means actuates the motor to drive the eccentric and therefore the plate and tooth from the first position to the second position to open the door lock.

It should be understood that in this specification the term key not only means a mechanical key in the conventional sense but also touch button sensors, magnetic cards, biometric sensors and the like. In the preferred embodiment of the invention the key is in the form of a touch button and the actuating means includes a reader for reading the touch button so that when an appropriate button H:\paulad\Keep\speci\CDS WORLDWIDE PTY LTD Door Lock.-CAP-doc.doc 13/03/01 7 is supplied to the reader the motor is actuated to move the tooth from the first position to the second position.

Preferably a micro-processor is included for controlling the reader and actuating the motor.

Preferably a handle is provided on the lock for enabling the lock to be unlocked by a movement of the handle.

Preferablya lever mechanism is coupled to the handle so that when the handle is moved to open the lock, the lever mechanism moves the tooth from the first position to the second position, against the bias of the biasing means, to thereby allow rotation of the ratchet wheel and the rotary lock element in the reverse direction, so the rotary lock element can be removed from the recess in the catch element.

20 Preferably a deadlock mechanism is provided for preventing •go• movement of the lever mechanism so that the lock can be deadlocked and prevented from being opened by the handle.

Preferably the deadlock mechanism comprises a locking 25 member for preventing movement of the lever mechanism.

•0 Preferably the locking member comprises at least one plug member moveable from a first position in which it enables movement of the lever mechanism to a second position in which it prevents movement of the lever mechanism upon movement of the handle.

Preferably a deadlock lever mechanism is provided for locating the plug in the first position in which the deadlock mechanism is not actuated to allow opening of the lock upon movement of the handle, and whereupon the deadlock lever mechanism is releasable to allow the H:\paulad\Keep\speci\CDS WORLDWIDE PTY LTD Door Lock.-CAP-doc.doc 13/03/01 8 deadlock lever to move to a second position so the plug can move to the second position which prevents movement of the lever mechanism.

Preferably a push button is coupled to the deadlock lever mechanism for moving the deadlock lever mechanism to the second position.

Preferably the deadlock lever mechanism includes an abutment portion engagable by the eccentric when the deadlock lever mechanism is in the second position and the eccentric rotates so that upon presentation of a valid key and actuation of the motor, rotation of the eccentric moves the deadlock mechanism to move the plug to the first 15 position whereby the handle will move the lever mechanism to enable opening of the door.

The invention, in a further aspect, may be said to reside in a door lock for a door, including; 20 a lock element for engagement with a co-operating lock element on a door frame to hold the door in a closed position; a lock element release member moveable from a first position in which it retains the lock element in a 25 locked position so that when the lock element engages the *9 co-operating element the door is locked in the closed position, to a second position in which the lock element is placed in an unlocked condition so the lock element can be removed from the co-operating element to enable the door to be opened; biasing means for biasing the lock element release member towards the first position to retain the lock element in the lock condition; drive means for moving the lock element release member from the first position to the second position upon presentation of a valid key to the door lock, against the bias of the biasing means; H:\paulad\Keep\speci\CDS WORLDWIDE PTY LTD Door Lock.-CAP-doc. doc 13/03/01 9 a door handle on the lock which, when the lock is installed in a door, is located on the interior side of the door; a lever mechanism coupled to the door handle and to the lock element release member for moving the lock element release member to the second position against the bias of the biasing means so that the lock element is placed in the unlocked condition to enable the door to be opened; and deadlock means for engaging the lever mechanism to prevent movement of the lever mechanism so that the lever mechanism cannot move the lock element release member to the second position to unlock the door, and thereby placing the lock in a deadlock condition; and ooo0 the deadlock means being engagable by the drive means upon presentation of a valid key to the door lock, to move the deadlock means so as to release the deadlock means from the lever mechanism to release the deadlock.

Preferably the lock element comprises a rotary lock element and the co-operating element is a catch element, engagement between the lock element and the catch element causing rotation of the lock element so the lock element rotates into the catch element to be retained by the catch element.

Preferably the lock element release member, in the first position, allows rotation of the rotary lock element in a first direction but prevents rotation in the second direction so that the rotary lock element cannot rotate out of the catch element thereby locking the lock element to the catch element.

Preferably the lock element includes a ratchet wheel, and the lock element release member includes a ratchet tooth for engaging the ratchet tooth to allow rotation of the lock element in the first direction but prevent rotation of the lock element in the reverse direction.

H:\pau1ad\Keep\speci\CDS WORLDWIDE PTY LTD Door Lock.-CAP-doc.doc 13/03/01 10 Preferably when the lock element is in the second position, the tooth is removed from the ratchet wheel thereby allowing the lock element to rotate in the reverse direction so that the lock element can rotate out of the catch element to release the lock element from the catch element.

In another embodiment of the invention the lock element comprises a recess in the lock element release member for engaging a catch hook connected to a door frame so that in a first position of the lock element release member the catch hook engages through the opening and locks the behind the opening to prevent separation of the catch hook from .15 the lock element and in the second position the opening is aligned relative to the catch hook so as to enable the catch hook to pass out of the opening so that the lock "element can be released from the catch hook to enable opening of the door.

Preferably the drive means includes a motor having an output shaft, and an eccentric cam located on the output shaft for engaging the lock element release member so that upon actuation of the motor the eccentric cam is rotated to 25 engage the lock element release member and force the lock element release member to the second position against the -o••o S"bias of the biasing means.

Preferably the motor holds the eccentric cam in position so as to hold the lock element release member at the second position for a predetermined time period, and thereafter continues rotation to enable the lock element release member to be returned to he first position by the biasing means.

In other embodiments of the invention the drive means may include a solenoid, electromagnet or the like instead of an H:\paulad\Keep\speci\CDS WORLDWIDE PTY LTD Door Lock.-CAP-doc.doc 13/03/01 11 electric motor.

Preferably the handle is coupled to an arm, the arm having a spring for biasing the arm and the handle into a closed position; the lever mechanism including a bar coupled to the arm, a lever pivotally mounted to the door lock and having a first lever arm which is pivotally connected to the bar and a second lever arm, the second lever arm being engagable with the lock element release member so that upon movement of the door handle the arm is moved against the bias of the spring to draw the bar and the therefore rotate the lever about the pivot so that the second lever arm :i contacts the lock element release member and pushes the lock element release member to the second positions against the bias of the biasing means to thereby place the lock element in the unlocked condition so the door can be opened.

•i 20 Preferably the second lever arm engages the lock element release member by projecting through an opening in the lock element release member.

Preferably the deadlock means includes a pivotally mounted deadlock lever having a first portion the first portion of the deadlock lever in a first position of the deadlock lever, engaging a locking means for holding the locking means in a release position whereby the handle and the lever mechanism can move to place the lock element in the unlocked condition, and whereupon the deadlock lever is moveable to a second position whereby the lock means is released to move to a locking position to lock the lever mechanism to prevent movement of the lever mechanism thereby preventing movement of the lock element release member to the second position and placing the door lock in deadlock condition.

H:\paulad\Keep\speci\CDS WORLDWIDE PTY LTD Door Lock.-CAP-doc.doc 13/03/01 12 Preferably the lock means comprises at least one plug which is spring biased towards the deadlock lever so that when the deadlock lever is moved to a second position the plug is biased to a locking position where it prevents movement of the lever mechanism.

Preferably the deadlock mechanism also includes a retainer member which retains the deadlock lever in the first position and, upon actuation of the retainer member, allows the deadlock lever to move to the second position to place the lock in the deadlock condition.

Preferably the retainer member comprises a control member spring biased into a first position, a pivotally mounted rocker bar engaged by the control member, the rocker bar being pivotally coupled to a spring biased lock bar which in a first position prevents movement of the deadlock lever to the second position and upon actuation of the control member, the rocker bar is pivoted to draw the lock bar away 20 from the deadlock lever so that the deadlock lever is pushed by the spring biased lock means to the second position to place the lock in a deadlock condition.

ooo Preferably the deadlock lever has an end portion arranged adjacent the drive means so that when the lock is in the :deadlock position and a valid key is presented to the lock, the drive means engages the end portion of the deadlock lever to force the deadlock lever back to the first position to return the lock means to the position where the lever mechanism is released to place the lock in the nondeadlocked condition.

Preferably the lock element release member comprises a moveable plate, a tooth being formed on the plate for engagement with the lock element to retain the lock element in the lock condition when the plate is in the first position.

H:\paulad\Keep\speci\CDS WORLDWIDE PTY LTD Door Lock.-CAP-doc.doc 13/03/01 13 In a further aspect the invention may be said to reside in a door lock for a door including; a lock element for engagement with a co-operating lock element on a door frame to selectively lock the door in a closed position; a handle pivotally mounted to the door lock for movement from a first position to a second position away from the door lock about the pivot; a door unlock member coupled to the handle and having a retainer element for engaging the lock element to maintain the lock element in a lock condition; and wherein when the handle is moved from the first position to the second position the lock release member is moved to disengage the retainer member from the lock S element so that the lock element is released to place the lock element in an unlocked condition so the lock element can be withdrawn from the co-operating element to enable the door to be opened.

A further aspect of the invention concerns conventional locks which are purely mechanical in nature and are installed in or on a door and are actuated by a key. In recent times, electronic door locks have been proposed which are electrically operated and generally include a drive in the form of a motor, solenoid or the like in order to unlock the door lock.

The invention relates to improvements in such electronic door locks.

The invention in a further aspect may be said to reside in an electronic door lock for a door including; a lock element for engaging a co-operating lock element on a door frame, the lock element being moveable from a first position in which the lock element can engage the cooperating lock element to hold the door in a closed H:\paulad\Keep\speci\CDS WORLDWIDE PTY LTD Door Lock.-CAP-doc.doc 13/03/01 14 position and a second position in which the lock element is moved out of engagement with the co-operating lock element to enable the door to open; a lock element drive portion coupled to the lock element for moving the lock element from the first position to the second position; biasing means for biasing the lock element drive portion and therefore the lock element towards the first position; a pivotally mounted link mounted for pivotal movement between a first link position and a second link position, the link engaging the drive portion so that when the link moves from the first link position to the second link position the drive portion is moved by the link to drive S•the lock element from the first position to the second 15 position; an electronic actuator for receiving a key, determining whether the key is authentic and for driving the link from S"the first link position to the second link position; a door handle which forms an internal handle when the door "20 lock is mounted on a door; and a second pivotally mounted link coupled to the door handle and engaging the drive portion, the second link being moveable from a third link position to a fourth link position upon operation of the door handle so the second link moves from the third link position to the fourth link position thereby driving the drive portion and therefore S"the locking element from the first position to the second position to enable a door to be opened.

Preferably the electronic actuator includes a touch button sensor for receiving a key in the form of a touch button, processing means for receiving signals from the sensor and determining whether the touch button is authentic, a motor coupled to the processing means so that upon determining the presence of an authentic key the processing means actuates the motor to cause the first pivotally mounted link to move from the first link position to the second H:\paulad\Keep\speci\CDS WORLDWIDE PTY LTD Door Lock.-CAP-doc.doc 13/03/01 15 link position.

Preferably the motor has an output shaft, a worm gear on the output shaft, a pin on the first link and engaging the worm gear so that when the motor is actuated and rotates in one direction the engagement between the pin and the worm gear move the pin along the worm gear and therefore causes the link to pivot from the first link position to the second link position, and where upon rotation of the motor in the opposite direction will cause the pin to move in the opposite direction because of engagement with the worm gear so that the first link is pivoted from the second link position to the first link position.

15 Preferably the link carries a roller wheel and the roller wheel engages the drive portion to move the drive portion and therefore the lock element from the first position to the second position upon movement of the first link from the first link position to the second link position.

Preferably the drive portion is a slide plate and the drive portion has a first cut out, the roller wheel of the first "link being received in the cut out and engaging an edge which defines the cut out so that upon movement of the first link from the first position to the second position S"the slide plate is driven by engagement of the roller wheel S"with the edge to move the plate and therefore the lock element from the first position to the second position.

Preferably the plate includes a second cut out and the second pivotally mounted link includes a roller wheel which engages in the second cut out and engages an edge which defines the cut out so that upon movement of the second link from the third link position to the fourth link position the plate is moved to move the lock element from the first position to the second position.

H:\paulad\Keep\speci\CDS WORLDWIDE PTY LTD Door Lock.-CAP-doc.doc 13/03/01 16 Preferably the first link includes a biasing spring for biasing the link when in either the first link position or the second link position so that the pin is drawn into engagement with the worm gear, so that upon rotation of the worm gear the pin will engage with the worm gear and move along the worm gear to move the first link between the first link and second link positions.

In invention still further provides a door lock for engagement with a door fastening element having an inclined surface and an abutment surface, the door lock including; a locking member having and edge over which the inclined surface can ride to place the fastener into •locking engagement with the door lock, and an engaging 15 surface for engaging with the abutment surface to hold the ^fastener in a locked condition; biasing means for biasing the lock member into a locking position; and drive means for driving the locking member to a 20 second position in which the edge and engagement surface •co• are withdrawn away from the fastener so that the abutment surface and inclined surface can be released from the lock o to open the door.

Preferred embodiments of the invention will be described, by way of example, with reference to the accompanying drawings in which; Figure 1 is a perspective view of a door lock according to the preferred embodiment of the invention; Figure 2 is a rear perspective view of the door lock of Figure 1; Figure 3 shows in the manner in which the door lock is mounted in a door; Figure 4 illustrates the disposition of the door lock relative to a door catch element mounted on a door frame; Figure 5 is a front view of the door lock of H:\paulad\Keep\speci\CDS WORLDWIDE PTY LTD Door Lock.-CAP-doc.doc 13/03/01 17 Figure 1; Figure 6 is a cross-sectional view taken along the line VI-VI of Figure Figure 7 is a cross-sectional plan view along the line VII-VII of Figure Figure 8 is a cross-sectional view taken along the line 8-8 of Figure 7; Figures 9, 10, 11 and 12 are drawings showing a rotary lock element used in the preferred embodiment of the invention; Figures 13 and 14, Figures 15 and 16, and Figures 17 and 18 show respectively front views and side views of the rotary locking element and the manner in which it is locked in position or released for rotation; 15 Figure 19 and 20 are diagrams illustrating the o* o lock in a locked position; Figures 21 and 22 are drawings similar to Figures 19 and 20 showing the lock moved to an unlocked position by opening a door handle; 20 Figure 23 is a view showing a deadlock mechanism used in the preferred embodiment of the invention but with the deadlock released and a handle in an open position; Figure 24 is a cross-sectional view along the line A-A of Figure 23; Figure 25 is a drawing similar to Figure 23 but showing the structure when a handle is closed; Figure 26 is a drawing similar to Figure 23 but showing the lock in a deadlocked condition; Figure 27 is a view along the line A-A of Figure 26; Figures 28, 29, 30 and 31 are diagrams showing how the rotary lock element engages in the catch element to enable a door to be closed and locked; Figure 32 is a block circuit diagram showing the electronic control of the preferred embodiment of the invention; Figure 33 is a view similar to Figure 8 but H:\paulad\Keep\speci\CDS WORLDWIDE PTY LTD Door Lock.-CAP-doc.doc 13/03/01 18 showing a second embodiment of the invention; Figure 34 is a view along the line D-D of Figure 33; Figure 34A is a view of a modification to the embodiment of Figure 34; Figure 35 is a view similar to Figure 33 but in an unlocked condition; Figure 36 is a view along the line E-E of Figure Figure 37 is a front view of a door including a lock according to the other further embodiment of the invention; Figure 38 is a side view of the door including the lock of Figure 37; 15 Figure 39 is an internal view of the door having Sthe lock at Figures 37 and Figure 38; Figure 40 is a cross sectional view through the "lock according to this further embodiment of the invention; and Figure 41 is a cross sectional view along the line z-z of Figure 40 in the slightly exploded condition to illustrate various components of the lock according to this still further embodiment of the invention.

With reference to Figures 1 and 2 a door lock is shown which has a housing 10 formed from side walls 12 and 14, top wall 16, bottom wall 15, rear wall 18 and a front plate The side wall 12 has a recess or cut out section 22 in which is mounted a rotary lock element 24. The lock element 24 is journalled for rotation within the recess 22 on a shaft 24 with the shaft 24 being mounted on a bearing or bushing (not shown) in wall 12a of the recess 22.

The front panel 20 has light omitting diodes 26 and a touch pad reader 28 for receiving a touch button (not shown) which forms a key to enable the lock to be selectively locked or unlocked. Such touch buttons and readers 28 are H:\paulad\Keep\speci\CDS WORLDWIDE PTY LTD Door Lock.-CAP-doc.doc 13/03/01 19 known and therefore will not be described in detail.

Suffice to say that each button has a unique code so that when it is located on the reader 28, the reader 28 reads the code from the button and compares the code with predetermined codes to enable access to be granted or denied.

A catch element 30 is provided for mounting on a door frame for co-operating with the rotary element 24, as will be described in more detail hereinafter, to either lock the door by engagement of the rotary element 24 within the catch 30 or to enable the rotary element 24 to leave the catch 30 to open the door.

The side wall 12 has a pair of lugs 32 which project o: upwardly and downwardly from the side wall 12. The lugs 32 may be formed integral with the side wall 12. Each of the S" lugs 32 carries an integral flange 34 which projects at right angles with respect to the lug 32. The front face "20 also has an integral peripheral flange 36 which projects beyond the perimeter of the top 16, side wall 14 and bottom wall 15 of the housing 10. A cut-out 38 is also formed in the front face 20 which registers with the recess 22.

A handle 39 is pivotally mounted on rear wall 18 for opening the lock as will be described in more detail hereinafter. The rear wall 18 also has a reader 28' which is identical to the reader 28 for enabling a touch pad to be located on the reader 28' from the inside of a building on which the lock is located so the door can be unlocked from the inside by the touch button (not shown).

The lugs 32 have holes 33 for receiving screws (not shown) so that the lock can be secured to a door as will be described with reference to Figure 3. In order to mount the lock 10 in a door 45 shown in Figure 3, a recess 47 is cut in the door. A pair of small recesses 49 are cut in H:\paulad\Keep\speci\CDS WORLDWIDE PTY LTD Door Lock.-CAP-doc.doc 13/03/01 20 side edge 48 of the door 45 and grooves 51 are cut into the side edge 48 adjacent one edge of the small recesses 48.

The lock 10 is inserted into the recess 47 with the lugs 32 engaging in the recesses 49 and with the flanges 34 locating within the grooves 51. Holes 52 my be drilled in the door 45 within the recesses 49 so that screws can be screwed through the holes 33 and into the drill holes 52 to thereby secure the lock 10 to the door The reader 28 on front face 20 in Figure 3 is intended to be on the outside of the door and be accessible to someone attempting to gain access through the door 45 from the outside. Obviously, the handle 39 is therefore on the 15 inside of the door 45 and can be accessed by a person wishing to open the door from the inside of a building so as to exit through the door As shown in figure 4 the catch element 30 is screwed onto a door frame 57 so that when the door is closed in the direction of arrow A in Figure 4, the rotary lock element 24 (which cannot be seen in Figure 4) will engage in the 9 'catch element 30 to hold the door 45 closed and, if 9desired, in a locked condition.

The light omitting diodes 26 can be illuminated and can be, 99999* for example, red in colour to show that the door is in a locked condition and could be deactivated when a valid touch button is located on the card reader 28 to open the door 45. Diodes 26 are mounted above and below the reader 28 simply so that the lock 10 can be inserted either way up and one or the others of the light omitting diodes 26 easily seen by a user when a touch pad is located on the reader 28, to indicate whether the touch pad has properly unlocked the door.

It will be apparent from the preferred embodiment of the H:\paulad\Keep\speci\CDS WORLDWIDE PTY LTD Door Lock.-CAP-doc.doc 13/03/01 21 invention that the lock 10 comes as a unitary structure which does not need to be dismantled or assembled in order to install it in the door. All that needs to be done is for the recesses 47, 49 and groove 51 to be cut and for the lock 10 to then be located in place and screwed in position by screws which pass through the holes 33 and into the drilled holes 52. Thus, although a sawing operation is required, the lock is very easy to install and does not require partial assembly or for holes to be cut in predetermined positions to match components of the lock which must be located together in order to install the lock in the door. Thus, the lock is generally easier to install than conventional locks which do require some assembly in order to facilitate their installation in a door.

*0 The location of the flanges 34 within the grooves 51 also reinforces the door against any attempt to break in by kicking the door inwardly from the outside. Thus, if the door is locked with the rotary element 24 secured in the •e 20 catch 30, the lock 10 is effectively held fixed in position relative to the catch 30. Any attempt to kick the door in by kicking on the front face of the door 45, which could have the tendency to break the door 45 away from the lock will be resisted by the reinforcement provided by the flanges 34 engaged within the grooves 51. The engagement of the flanges 34 and the grooves 51 will therefore resist the door from moving relative to the lock 10 and therefore being kicked open from the outside. Similarly, the peripheral flange 36 about front face 20 which will abut about the perimeter of the recess 47 of the door 45 will also resist any attempt to kick the door from inside the building should the lock 10 be deadlocked.

In the embodiment described, the portion of the door between the groove 51 and front face 45a of the door is sandwiched between the flanges 34 and the peripheral flange 36. However, in other embodiments the entire thickness of H:\paulad\Keep\speci\CDS WORLDWIDE PTY LTD Door Lock.-CAP-doc.doc 13/03/01 22 the door 45 could be arranged between the flange 34 and 36, with the flange 34 simply abutting inside face 45b of the door With reference to Figures 5 to 8 which show internal structural details of the lock, it should first be noted for ease of illustration the lugs 32 and flanges 34 are not shown in Figures 5 to 8.

Within housing 10 there is a battery storage compartment 59 for receiving batteries 60 for supplying electric power to the lock. A printed circuit board 62 is mounted within the housing 10 and carries the electronic componentary for operating the lock as will be described in detail hereinafter. Mounted on the battery compartment 59 are mounts 63 which support an electric motor 64. The electric motor 64 has an output shaft 64a which carries a cylindrical eccentric 67. The eccentric 67 operates in the nature of a cam as will be described in detail hereinafter.

A ratchet wheel 65 is mounted on shaft 25 of the rotary lock element 24 for rotation with the rotary lock element S !24. The wheel 65 is internal within the housing 10 and therefore cannot be seen in Figure 1.

As best seen in Figure 8 a slide plate 66 is mounted within •the housing 10 for movement in the direction of double headed arrow B in Figure 8. The slide plate 66 is biased upwardly in Figure 8 by a spring 68 which is arranged between the slide plate 66 and support 69 connected to bottom wall 15. Cam 67 engages on an abutment or wall 69 which is fixed to the plate 66 so that when the eccentric cam 67 is rotated by the motor 64 the slide plate 66 is pushed downwardly by engagement of the cam 67 on the wall 71 against the bias of the spring 68. The plate 66 also has an end wall 72. A fixed support rail or plate 73 extends from side wall 12a to side wall 14 and carries a H:\paulad\Keep\speci\CDS WORLDWIDE PTY LTD Door Lock. -CAP-doc.doc 13/03/01 23 first micro-switch 74 and a second micro-switch The plate 66 also has a lower projecting lip 75 which carries an integral tooth 77. The tooth 77 engages with the ratchet wheel 65 to allow the ratchet wheel 65 to rotate in one direction but to prevent rotation of the ratchet wheel in the opposite reverse direction. Thus, since the ratchet 65 is connected to the rotary element 24 via the shaft 25 the element 24 can rotate in one direction with the wheel 65 but is prevented from rotating in the opposite direction because of the engagement of the tooth 77 with the wheel 65. The plate 66 as is mentioned above, is biased upwardly so that the tooth 77 is engaged with the ratchet wheel 65 and in this position the eccentric cam 67 15 closes the micro-switch 75 so that the micro-switch 75 can provide a signal indicative of the position of the plate 66. When the motor 65 is activated and the eccentric cam 0. 67 rotated by shaft 64a the cam 67 will engage the wall 71 and push the plate 66 downwardly in Figure 8 against the 20 bias of the spring 68. The wall 72 will engage the microswitch 74 so that when the micro-switch 74 is fully closed the motor 64 can be shut off to discontinue rotation of the cam 67. In this position the cam 67 has also left the o micro-switch 75 so that that micro-switch is opened. Thus, the two micro-switches 74 and 75 can be used to define the limits of movement of the plate 66 and shut off the motor when the plate 66 is in the uppermost position shown in Figure 8 or the lowermost position which will be described in more detail hereinafter.

Thus, in order to lock the door 45, the door 45 need only be pushed to the closed position, whereupon the rotary element 24 will engage in the catch 30 and rotate into the catch 30 as will be described in more detail hereinafter.

Rotation of the element 24 in the direction to enable engagement of the element 24 in the catch 30 is able to take place by the ratchet wheel 65 merely riding over the H:\paulad\Keep\speci\CDS WORLDWIDE PTY LTD Door Lock.-CAP-doc.doc 13/03/01 24 tooth 77 in the manner of a conventional ratchet arrangement. However, once the element 24 is located in the catch 30 the element 24 cannot rotate backwards because of the engagement of the tooth 77 with the wheels thereby preventing the element 24 from being moved out of the catch 30 as will be descried in more detail hereinafter.

If a person wishes to gain access through the door 45 from the exterior of the building the person must then present a valid touch button to the reader 28 which is located on the outside of the door 45. If a valid touch button is presented to the reader 28 the motor 65 is actuated to rotate the eccentric cam 67 so that the cam 67 engages the 15 wall 71 and pushes the plate 66 downwardly against the bias of the spring 68. Downward movement of the plate 66 will *draw the tooth 77 away from the ratchet wheel 65 thereby enabling the ratchet wheel 65 to rotate in the reverse direction so that the element 24 can rotate out of the 20 catch As is best seen in Figure 9 the ratchet wheel 65 has a plurality of rack teeth 65a which have a sloping surface 65b and a radial surface 65c. The rotary element 24 is formed from a plurality of generally curved spokes 21 which extend radially outwardly from shaft 25. The rotary element 24 may have a circular backing plate adjacent one side of the rotary element 24 and which sits flush with the wall 12a when the rotary element 24 is mounted in the wall 12a of the recess 22. The spokes 25 are rounded and generally define a plurality of peaks 21a and valleys 21b.

Figures 13 and 14 show the position described with reference to Figure 8 in which the plate 66 is in the uppermost position with the tooth 77 engaged with the ratchet wheel 65. As should be apparent from Figure 13, in this position the ratchet wheel 65 and therefore the H:\pau1ad\Keep\speci\CDS WORLDWIDE PTY LTD Door Lock.-CAP-doc.doc 13/03/01 25 element 24 can rotate in the direction of arrow C because the tooth 77 will simply ride over the inclined surface as the ratchet wheel 65 rotates with the plate 66 being pushed down against the bias of the spring 68 during this rotary movement as shown by Figures 15 and 16. However, any attempt to rotate the ratchet wheel 65 and element 64 in a direction opposite arrow C will cause the radial surface 65c to abut the tooth 77 and stop rotation in the reverse direction. Whilst a slight amount of rotary movement may be accommodated by the space between ratchet teeth 65 insufficient rotary movement will take place to enable the element 24 to disengage from the catch Figures 17 and 18 show the position when a valid touch pad 15 has been located on the reader 28 and the motor 64 rotated so as to push the plate 66 downwardly against the bias of the spring 69. As can be seen in Figures 17 and 18 the i tooth 77 is withdrawn from the ratchet wheel 65 thereby freeing the ratchet wheel 65 and element 24 to rotate in either direction as shown by double headed arrow E in Figure 17. Thus, by pushing the door towards the open position the element 24 can simply and easily rotate out of the catch and enable the door 45 to be opened.

Figures 28 to 31 show how the rotary element 24 is able to S: engage with the catch 30. With reference to these figures, it will be seen that in Figure 28 the rotary element 24 is separate from the catch 30 as will be the case when the door is in the opened position or moving towards the closed position. As the door 45 moves to the fully closed position as illustrated in Figure 29 the rotary element 24 comes into abutment with the catch 30. The catch 30 has a cavity 80 which has a curved upper surface 82 which slopes downwardly to a slight ramp portion 83. A small recess 84 communicates with the cavity 80 and a peak 86 is provided on the other side of the recess 84 to the surface 83. The peak 86 merges downwardly by a wall section 87 to compete H:\paulad\Keep\speci\CDS WORLDWIDE PTY LTD Door Lock.-CAP-doc.doc 13/03/01 26 the cut-out 80. The recess 84 defines a locking recess which will serve receive and to lock the rotary element 24 in position within the catch As shown in Figure 30 when the rotary element 24 engages the catch 30 one of the -spokes 21 will engage on the surface 87. This engagement will cause the rotary element 24 to rotate in the direction of arrow C in Figure This rotary direction is the same as the direction C described with reference to Figures 13 to 16 which is allowed by the ratchet teeth 65 simply riding over the tooth 77 as previously described. As the rotary element 24 rotates it moves into the cavity 80, as shown by Figure 31 with one of the spokes 21 engaging in the recess 84 and S° 15 another of the spokes resting on the inclined surface 83.

When the ratchet wheel is in the position shown in Figure 31 it is located in position and cannot further rotate in :the direction of arrow C because the spoke 21 is engaged within the recess 84 and another of the spokes 21 is resting on the surface 83. Rotation in the reverse S direction to arrow C is prevented, as was described with reference to Figures 13 to 16, by the tooth 77 engaging the ratchet tooth 65a on the wheel 65. Thus, since the rotary element 24 can no longer rotate in the direction of arrow C because it is trapped in the recess 84 and because reverse rotation cannot take place, the rotary element 24 and therefore the door is locked to the catch 30 and held in the locked and closed position.

As described with reference to Figures 5 to 8, if a valid touch pad is located on the reader 28, the plate 66 is moved to the position shown in Figures 17 and 18 thereby releasing the wheel 65 to rotate in the reverse direction.

Thus, by simply pushing or pulling the door towards the open position the rotary wheel 64 is able to rotate in a direction opposite arrow C in precisely the opposite manner, in which it rotated to become engaged in the H:\pauad\Keep\speci\CDS WORLDWIDE PTY LTD Door Lock.-CAP-doc.doc 13/03/01 27 position shown in Figure 31 so that the element 24 can rotate out of cavity 80 and release from the catch In order to open the lock 10 from inside the building the handle 39 can be used unless the lock is in the deadlock condition which will be described in detail hereinafter.

With reference to Figures 19 to 22, the handle 39 is pivotally mounted on rear wall 18 by a pivot pin 87, and, can be moved in the direction of arrow G in Figure 21 to an open position. The handle 39 has an arm 88 connected to it which passes through a hole 90 in the wall 18. A spring 91 is located about the arm 88 and between the wall 18 and a rib 92 formed on the arm 88 for biasing the handle 39 into 15 the closed position shown in Figure 19. The arm 88 has a lever mechanism 95 coupled to it as shown in Figure 19 and also shown in Figures 6, 7 and 8. The lever mechanism is comprised of a rod 96 which is pivotally connected to the arm 88. A lever 100 is pivotally mounted on a pivot 20 pin 100a within the housing 10 as includes a lever arm 97 S.which has one end pivotally connected to the rod 96 and a second lever arm 98 which projects at an angle of slightly less than 900 with respect to the lever arm 97. The plate 66 is provided with a window 99 through which the arm 98 projects. In the position shown in Figure 19 the tooth 77 1is engaged with the ratchet wheel 65 as is shown by Figure 20 and the lock is in the position where, when the door is closed, the door will be locked because rotation of the wheel 65 and element 24 in the reversed direction to arrow C previously described cannot take place. In order to open the door from the inside a person merely grips the handle 39 and pulls the handle 39 in the direction of arrow G as shown in Figure 21. This will pull the rod 96 with the arm 88 against the bias of the spring 91 to cause the lever 100 to rotate on pivot pin 100a so the arm 98 is pushed downwardly in the direction of arrow H in Figure 21. Since the arm 98 projects through the window 99 downward movement H: \paulad\Keep\speci\CDS WORLDWIDE PTY LTD Door Lock.-CAP-doc.do c 13/03/01 28 of the arm 98 will push on the lower edge 101 of the window 99 thereby pushing the plate 66 downwardly also in the direction of arrow H against the bias of the spring 68 to cause the tooth 77 to be drawn away from the wheel 65 as shown in Figure 22. This frees the rotary element 24 for rotation in the reversed direction and continued pulling on the handle 39 will enable the rotary element to rotate in the reverse direction described with reference to Figures 28 to 31 so that the rotary element 24 can rotate out of the catch 30 to enable the door to be opened.

When the handle 39 is released the spring 91 biases the arm 88 back to the position shown in Figure 19 which causes the lever mechanism 95 to move back into the position shown in Figure 19. The springs can then biase the plate 66 upwardly so that the tooth 77 can re-engage with the wheel to prevent the reverse rotation of the wheel 65 and element 24 so that when the door is again closed it is held in the locked position with rotating element 24 caught in 20 the catch Thus, in accordance with the abovementioned operation the door can be opened from inside the building by simply gripping and pulling the handle 39 as described above.

However, in order to gain access from the outside it is necessary to present a valid "key", in the form of a touch button in the preferred embodiment, to the reader 28 in order to open the door.

The lock according to the preferred embodiment also has a deadlock capability. The deadlock mechanism i10 is shown in Figures 7 and 8 but for ease of illustration and clarity will be described with reference to Figures 23 to 27.

With reference to Figure 23 the bore 94 previously described carries a cylindrical plug 103 which in the position shown in Figure 23 is wholly within the bore 94.

H:\paulad\Keep\speci\CDS WORLDWIDE PTY LTD Door Lock.-CAP-doc.doc 13/03/01 29 The plug 103 takes up this position during operation of the lock previously described. As is evident from Figures 23 and 25 when the handle 39 is pulled in the direction of arrow G shown in Figure 21, and the spring 91 compressed, the plug 103 is fully accommodated in bore 94 and simply move as a single unit with the arm 88.

A tube 105 is mounted within the housing 10 and, when the handle 39 is in the closed position shown in Figure 19, the tube 105 registers with the bore 94 (as is best shown in Figure 25). A short open ended tube 104 is provided on the opposite side of the bore 94 to the tube 103. The tube 105 carries a cylindrical plug 106 and the plug 106 is biased towards the plug 103 by a spring 107 located in the tube 103. The plugs 106, 103 and 108 are held in the position shown in Figures 23 and 25 by a pivoted lever 109 which is *..*pivotally mounted on a pivot pin 110. The lever 109 has a boss 111 at its end adjacent the plug 108 and in the S: position shown in Figures 23 and 25 the lever 109 holds the cylindrical plugs 106, 103 and 108 in the positions shown so that the plug 94 is able to move with the arm 88 when he handle 39 is moved to open the door. As the plug 94 moves out of registry-with the tubes 105 and 104, as shown in ~Figure 23, the arm 88 holds the spring biased plug 106 and the smaller plug 108 in the position shown in Figures 23 and As shown in Figures 23 and 24 a deadlock button 112 projects through an opening 113 through wall 12. The button 112 is biased by a spring 113 so that it projects outwardly of the hole 113. The spring 113 extends between a washer 114 connected to the button 112 and a fixed abutment 115. The button 112 has a shaft 117 which passes through the abutment 115 and engages a pivotally mounted bar rocker 118. As clearly shown in Figure 24 the bar 118 is pivoted closer to one end than the other on a pivot pin 119 so that it tends to take up the orientation shown in H:\paulad\Keep\speci\CDS WORLDWIDE PTY LTD Door Lock.-CAP-doc.doc 13/03/01 30 Figure 24. The bar 118 is pivotally connected to locking rod 120 and the locking rod 120 is biased upwardly in Figure 24 by a spring 121 which extends between a fixed abutment 122 coupled to side 12 and a rib 124 formed on the locking bar 120.

The lever 109 is prevented from moving away from the position shown in Figures 23 and 25 because it engages the locking bar 120 as shown in Figure 24 and this prevents the spring bias of the spring 107 which is applied to the plug 106 (and also the plugs 103 and 108 when the plugs are in alignment as shown in Figure 25) for moving the lever 109.

Thus, since the plug 103 is retained completely within the bore 94 the door handle 39 can be opened in the manner 15 previously described to enable the door 45 to be opened ooooo from the inside.

When it is desired to operate the deadlock, the button 112 is pushed inwardly as shown by arrow J in Figure 27. This oo causes the rod 117 to push against the bar 118 and rotate the bar 118 about pivot pin 117. Rotation of the bar 118 draws the locking bar 120 upwardly against the bias of spring 121 so that the locking bar 120 is drawn out of the path of the lever 109. The spring bias of the spring 107 can therefore push the plug 106, the plug 103 and the plug 108 against portion 111 of lever 109 so as to force the *":lever 109 to pivot into the position shown in Figure 26 where the lever abuts a stop 130 fixed within the housing In this position it will be apparent that the plug 103 has moved partially out of the bore 94 and the plug 106 is moved partially into the bore 94 from the tube 105. Thus, the arm 88 is prevented from being moved by the handle 39 which, in turn, prevents movement of the lever mechanism thereby preventing movement of the plate 66 so that the door remains in the locked position. That is, the handle 39, arm 88 and the lever mechanism 95 is locked in the position shown in Figure 19 so that the tooth 77 remains in H:\paulad\Keep\speci\CDS WORLDWIDE PTY LTD Door Lock.-CAP-doc.doc 13/03/01 31 engagement with the ratchet wheel 65 to hold the lock in the lock position previously described. Thus, the lock is in a deadlock condition and cannot be opened from the inside by means of the handle 39. Any further attempt to push the button 112 will have no effect because the lever 109 has located beneath the locking bar 120 as is shown in Figure 27 thereby holding the locking bar 120 in its upward position so the locking bar 120 cannot move the lever 109 back to the position in which it would realign the plug 103 completely within the confines of the bore 94 to enable the handle 39 to move the arm 88.

As is shown in Figures 23, 25 and 26, the lever 109 has an angled end portion 140 which has an end 141. The end 141 rests adjacent cam 67 when the lever 109 has been pivoted into the deadlock position shown in Figure 26. When it is desired to unlock the lock from the deadlock condition, a valid touch pad must be presented to either reader 28 which is accessible from the outside or to reader 28' which is located on the wall 18 and accessible from the inside of the building. When a valid touch pad is located on the reader 28', for example, the motor 64 is actuated to rotate the cam 67. Rotation of the cam 67 will engage the end 141 of the lever 109 and pivot the lever 109 from the position 25 shown in Figure 26 back to the position shown in Figure 23 and Figure 26. This pivotal movement will push the plugs 103, 106 and 108 against the bias of the spring 107 so that the plug 103 returns to the position where it fully occupies the bore 94. This pivotal movement of the rod 109 will also withdraw the rod 109 from beneath the locking bar 120 which will allow the locking bar 120 to be biased by the spring 121 back into the lowermost position where it holds the lever 109 in the position shown in Figure 23.

Movement of the locking bar 120 will return the bar 118 to the position shown in Figure 24 thereby pushing the button 112 outwardly of the hole 113.

H:\paulad\Keep\speci\CDS WORLDWIDE PTY LTD Door Lock.-CAP-doc.doc 13/03/01 32 As will be apparent from the above description, when the motor 64 is actuated to rotate the cam 67, the rotation of the cam 67 will move the plate 66 to the position where the tooth 77 is withdrawn from the ratchet wheel 65 thereby releasing the element 24 to rotate in the reverse direction to enable the door to be opened. Thus, the door can be opened by simply pushing from the outside or pulling on the lever 39 from the inside. Pulling on the lever 39 will actuate the lever mechanism 95 but since the door is already in the unlocked position by virtue of rotation of the motor 64, the handle 39 will simply facilitate pulling of the door open without having to perform the unlocking operation itself.

In the preferred embodiment of the invention the locking ::.bar 120 can carry an indicator 145 which is viewable through a window 147 in the side 12. The indicator 145 can carry a red marking and a green marking. When the button 112 is depressed to deadlock the lock and the locking bar 120 moves into the position shown in Figure 27 the red indicia can be visible through the window 147 indicating that the deadlock has been actuated. When the locking bar 120 returns to the position shown in Figure 24, the green indicia can be visible indicating that the deadlock has not been actuated. This simply provides for convenient visual inspection as to whether deadlock has been operated or not operated.

As is shown in Figure 1, the side 12 may also carry switches 151 which can be depressed to place the door in an unlocked condition so that it will not lock when closed.

This may be convenient if it is required to enter and exit repeatedly in a short period through the door. By pushing the button 151 the motor 64 can be actuated to rotate the cam 67 into the position where it will always hold the plate 66 in a lowermost position with the tooth 77 out of engagement with the wheel 65. Thus, the rotary element 24 H:\paulad\Keep\speci\CDS WORLDWIDE PrY LTD Door Lock.-CAP-doc.doc 13/03/01 33 rotates in both directions so the door can simply be pushed open and closed without locking. A button 152 can also be provided to enable touch buttons 28 to be deleted from use with the lock in case a touch button is lost. In order to operate the delete button 152 a valid touch button must be located on the pad 28 and all touch button stored to activate the lock, apart from the one used to activate the switch 152, will be deleted so they can no longer be used to open the lock. A button 153 can be used to add additional touch buttons which can activate the lock by locating a valid touch button on the reader 28 depressing the button 153 and then locating the additional touch buttons on the reader 28 so that they can be stored for future use with the lock.

i: 15 Since the buttons 151 to 153 are located on the side 12 of the lock which is not assessable when the lock is in the locked position, those buttons can only be actuated once the door is opened and, in the case of buttons 152 and 153 a valid identification button is presented to the card reader 28 (or 28').

Figure 32 shows an overall circuit block diagram of the electronic components used to operate the lock and which 25 are mounted on circuit board 62. With reference to Figure 32 a micro-processor 160 is provided which is coupled to ecard reader 28 (and also card reader The microprocessor 160 has a memory 162 in which codes associated with particular touch buttons such as touch button 170 shown in Figure 36 are remembered. The micro-processor 160 is connected to a lock energiser 164 which in turn is connected motor 64 for energising the motor 64 upon an appropriate output from the micro-processor 160 to the driver 164. The micro-processor is also connected to the micro-switches 74 and 75 so that when the micro-switches 74 and 75 close signals are inputted into the micro-processor so that the micro-processor can determine the position of H:\paulad\Keep\speci\CDS WORLDWIDE PTY LTD Door Lock.-CAP-doc.doc 13/03/01 34 the plate 66. The batteries 60 supply power to the microprocessor 160 and also the driver 164. The micro-processor 160 also operates the light omitting diodes 26 (not shown in Figure 32) and is programmed so as to enable hand held identification buttons 170 to be remembered in memory 162 so that each member of a household, for example, can be presented with his or her own touch button for unlocking the lock. Touch buttons can be deleted and added by use of the buttons 152 and 153 previously described.

The micro-processor controller shown in Figure 32 controls the door lock in the following manner.

Assuming that the door is closed and in the locked 15 condition, when a valid touch pad is presented to the card reader 28, the card reader supplies a signal to the microprocessor 160 which will equate to a code stored in memory 162. The micro-processor then outputs a signal to driver 164 to drive the motor 64 until micro-switch 74 switches off by contact of the wall 72 with the micro-switch thereby indicating that the plate 66 is in the lowermost position with the tooth 77 out of engagement with the wheel 65. The micro-processor will hold the motor in this position for a predetermined period of time, (for example five seconds), to enable the user to open the door and enter the building.

After the five seconds has expired, the motor again be energised by the micro-processor so as to rotate the shaft and cam 67 back into the position shown in Figure 8 where the micro-switch 75 is closed. This will enable the spring 68 to bias the plate 66 upwardly so the tooth 77 re-engages with wheel 65. If the user has not entered the building within the five second period, the user must again present his touch pad to the reader 28 to gain access.

If the lock is in the deadlock condition with the end 141 of the lever 109 in its second position adjacent the cam 67, rotation of the cam 67 will push the rod 109 back to H:\paulad\Keep\speci\CDS WORLDWIDE PTY LTD Door Lock.-CAP-doc.doc 13/03/01 35 its primary position to release the deadlock as described above.

Figures 33 to 36 show a second embodiment of the invention which, instead of using the rotary element 24 uses a hook type fastener 200 which is connected door frame 57. This embodiment generally operates in accordance with the same control protocols as the previous embodiment. The embodiment can be used with doors which swing into and out of the plane of a door opening as in the previous embodiment but has more application in sliding doors in which the door moves from an open to a closed position generally in the plane of the door opening. The hook type fastener 200 can be generally flat and in the nature of a barb as shown in Figure 34 or it can be cylindrical with a notch 200a cut into the cylindrical fastener 200 as shown in Figure 34A. Other configurations could also be used.

The important requirement for this embodiment is that the fastener 200 has an inclined surface 203 and an abutment surface 205, the function of which will be described in more detail hereinafter. In the position shown in Figures 33 and 34 the spring 68 has biased the plate 66 into its uppermost position so that when the door is closed the inclined surface 203 of the hook 200 rides over edge 207 of the opening 201 so the hook 200 can locate through the opening 201 to secure the door 45 to the frame 57. The fastener 200 is secured in place by the abutment surface i 205 engaging behind surface 209 of the plate 66. In order for the abutment surface 205 to engage behind the plate 66 some slight movement of the plate 66 relative to the fastener 200 can take place if necessary to enable the surface 203 to ride over the edge 207 and allow the abutment surface 205 to engage behind the plate 66. In order to open the door the motor 64 is energised in the manner described above so that the cam 67 rotates to push the plate 66 downwardly into the position shown in Figures and 36 where the opening 201 completely overlaps the H:\paulad\Keep\speci\CDS WORLDWIDE PrY LTD Door Lock.-CAP-doc.doc 13/03/01 36 fastener 200, and where the surface 209 is moved away from abutment surface 209, so the door can simply be pushed or pulled open with the hook 200 passing through the opening 201.

In this embodiment of the invention a closure plate 211 is mounted on a spring biased plunger 213. The plunger 213 is mounted through an opening 215 in frame 217 which forms part of the internal structure of the lock. Spring 219 extends between the frame 217 and closure plate 211 for biasing the plunger 213 and closure plate 211 in the direction of arrow P in Figure 34.

When the door is in the locked condition shown in Figure 34 15 the plunger has been pushed back against the bias of the spring 219 by the fastener 200 so that end 221 of the plunger contacts a micro-switch 221 to indicate that the door is in the locked condition. When the door is moved to the unlocked condition and the fastener 200 withdrawn from the plate 66 the spring 219 biases the plunger 213 and plate 211 in the direction of arrow P so the plate lies adjacent the opening 201 to close the opening 201 to prevent ingress of material into the lock. Movement of the plunger 213 also opens the micro-switch 221 so show that 25 the door is in the released condition.

This embodiment can use the same deadlock arrangement as in the earlier embodiment which is not shown simply for ease of illustration and the same lever mechanism for moving the plate 66 under the influence of the handle 39 as previously described.

Figures 37 to 41 show yet a further embodiment of the invention.

This embodiment of the invention uses the processing circuitry of Figure 32 although position sensor 74 and H: \paulad\Keep\speci\CDS WORLDWIDE PTY LTD Door Lock.-CAP-doc.doc 13/03/01 37 need not be included in this embodiment as will become apparent from the following descriptions.

This embodiment of the invention mounts the lock 10 in a conventional deadlock fashion with the lock being mounted on internal surface S of a door D. External surface X of the door mounts a touch button sensor 28 identical to that previously described. A hole is drilled through the door so that the sensor 28 can be mounted in the door and communicate with the lock on the internal surface S of the door.

A secondary door lock 300 may be used with the door D if required to open the door when the lock 10 has been opened 15 by an authentic touch button.

oo0e *The lock 10 according to the embodiments of Figures 37 to 41 is best shown in Figures 40 and 41 and with reference to S. those figures the lock includes a motor 64 which may be the same as that previously described. The motor 64 has an "i output shaft 301 and a worm gear 302. is mounted on the ooo shaft 301 for rotation with the shaft 301.

A locking element 305 is provided for movement between a first extended position as shown in Figure 40 in which the lock element 305 can engage in a striker plate or other coo go operating locking element of a door frame to hold the door in a closed position, and a retracted second position in which the lock element 305 is retracted to disengage the lock element 305 from the co-operating locking element to enable the door to be opened. The lockingelement 305 is connected to a drive portion in the form of a slide plate 306 which performs a similar function to the slide plate previously described. The slide plate 306 has a cut out 307 which is defined by an end edge 308, and an opposite end edge 309 and an internal transverse edge 310. A pivotally mounted link 320 is mounted on a pivot pin 321 H:\p&u1ad\Keep\speci\CDS WORLDWIDE PTY LTD Door Lock.-CAP-doc.doc 13/03/01 38 for movement between the positions shown in Figure 40 and identified by the reference numerals 320 and 320'. The link 320 carries a pin 322 which engages with the worm gear 302. In the position shown in Figure 1 the ring 320, under influence of gravity, tends to want to pivot in a clockwise direction which pushes the pin 322 into engagement with the thread on the worm gear 302. When the link is driven to the position shown by reference 320' gravity will also tend to want to pivot the link into an anti-clockwise direction and this will also have the effect of pushing the pin 322 into engagement with the thread on the worm gear 302. This natural bias holds the pin 322 in engagement with the worm gear regardless of the end of the worm gear at which the pin 322 is located so that upon actuation of the motor 'good 15 engagement occurs between the pin 322 and the worm gear so that the pin 322 will be positively driven along the worm m*oo .gear by rotation of the motor and the worm gear.

When a valid key in the form of a touch button is presented to the sensor 28, the processing circuitry described with reference to Figure 32 will energise the motor 64 causing the output shaft 301 to rotate. This will rotate the worm gear 302 in a prescribed direction to cause the pin 322 to be driven along the worm gear by virtue of the engagement of the pin 322 with the worm gear and rotation of the worm gear 302. As the pin 322 moves along the worm gear the link 320 pivots from the first link position shown by reference numeral 320 to the second link position shown by reference numeral 320'. When the pin 322 reaches the end of the worm gear and the link is in the position 320' the pin will simply remain at the end of the worm' gear and bounce around the last thread of the worm gear 302, so the pin 322 and link 320 will not be driven any further.

As noted above, the gravitational force on the link 320, when the lock is in the position shown in the drawings, will tend to maintain the pin and engagement with the worm H:\paulad\Keep\speci\CDS WORLDWIDE PTY LTD Door Lock.-CAP-doc.doc 13/03/01 39 gear. However, if the lock is installed in a position inverted with respect to that shown in the drawings a spring 324 is provided to ensure that the pin 322 is always forced into engagement with the thread on the worm gear when the link 322 is in either the first link position or second link position shown in Figure 40. When the link 320 is in the position shown by the reference numeral 320 the spring 324 is stretched and the tension in the spring tends to want to pull the link 320 in the direction of arrow P in Figure 40 so that the pin 320 is pulled into engagement with the end thread on the worm gear 302. When the link is driven to the position shown by reference numeral 320' the spring 324 is compressed and the compression of the spring supplies a bias to the link 320 wanting to push the link 15 320 in a direction opposite arrow P so that the pin is pushed into engagement with the last thread on the worm gear in that position. Thus, regardless of the orientation in which the lock is installed the pin 322 is always biased into engagement with the threads on the worm gear 302.

Slide plate 306 is biased into the position shown in solid lines in Figure 40 by a spring 330. The slide plate 306 can move against the bias of the spring 330 so that if the "door is closed and the locking element 305 engages a striker plate or co-operating lock element 309 (Figure 39) that engagement will push the lock 305 in the direction of arrow P in Figure 40 against the bias of the spring 330 so the lock element can align with an opening in the striker plate or co-operating lock element 309 and once aligned be pushed by the spring 330 so that lock element 305 is moved to the position shown in Figure 40 and can engage in the striker plate to hold the door in the closed position.

The link 320 carries a roller wheel 328 at its end remote from pivot pin 321 and the roller wheel 328 engages end edge 308 of the slide plate 306. When the processing circuitry described with reference to Figure 32 decides H:\paulad\Keep\speci\CDS WORLDWIDE PTY LTD Door Lock.-CAP-doc.doc 13/03/01 40 that a valid key, preferably in the form of a touch sensor button, has been presented to the sensor 28, the motor 64 is actuated and the link 320 is driven by the engagement by the pin 322 and the worm gear 302 to move the link 320 to the position shown by reference 320' in Figure 40. This movement causes the slide plate 306 to move in the direction of arrow P in Figure 40 by the engagement of the roller wheel 328 with the end edge 308 so that the plate 306 is moved to the position shown in phantom lines in Figure 40, against the bias of the spring 330. When the pin 322 reaches the opposite end of the worm gear 302 it will simply bounce in the last thread of the worm gear if the motor 64 continues to rotate and remain in engagement •with the worm gear. Whilst the link 320 is in the second position shown by reference 320', the door, to which the lock is fitted, can obviously be opened because the locking element 305 has been retracted with the plate 306. As in the earlier embodiments, the processing circuitry of Figure 32 can maintain the plate 306 in the second position shown in phantom lines in Figure 40 for a predetermined time interval and after that time interval expires the motor 64 can be driven in the reverse direction so that the pin 322 is moved from the left hand end of the worm gear in Figure ooo* 40 back to the right hand end so as to move the link 320 25 from the second position shown by reference numerals 320' back to the position of reference numeral 320 in Figure As the link 320 moves back to its first position the spring 330 can bias the slide plate 306 in the direction opposite arrow P to return the locking element 305 to its extended and first position shown in Figure 40 so that as soon as the door is closed the locking element 305 can engage with the striker plate or co-operating locking element to hold the door in a locked condition.

If it is desired to open the door from the inside, door handle 340 can be turned. The door handle 340 is connected to a second pivotally mounted link 350 which is mounted on H: \paulad\Keep\speci\CDS WORLDWIDE PTY LTD Door Lock.-CAP-doc.doc 13/03/01 41 a pivot 352 which may be the rotating shaft of the door handle or a pivot driven by the door handle 340.

The link 350 carries a roller wheel 352 at its end opposite pivot 352 and the plate 306 has a second rectangular cut out 354 which is defined by an end edge 356, an opposite end edge 358 and two transverse edges 360. The roller wheel 352 locates in the cut out 354 and engages the end edge 356. Thus, when the door handle 340 is rotated, the link 350 will be rotated so as to move to a fourth link position shown by reference numeral 350'. Engagement of the roller wheel 352 with the end edge 356 will draw the slide plate 306 against the bias of the spring 330 to its second position shown in phantom lines as described above.

Thus, the lock element 305 is disengaged from its cooperating lock element and the door can be pulled open.

Thus, as in the earlier embodiments, if desired, the door can be opened by any person from the interior simply by manipulating the door handle 340 which is on the internal 20 side of the door D shown in Figures 37 and 39.

When the door handle is released the spring 330 will pull the slide plate 306 and therefore the locking element 305 back to the position shown in solid lines in Figure 40 and will also cause the link 350 to be pushed back to its third link position shown in Figure 40 because of the engagement of the edge 356 with the roller wheel 352.

This embodiment of the invention may include a deadlock mechanism 360 which has deadlock lock element 362 which can locate in a co-operative locking element to place the door lock in a deadlock condition.

As shown in Figure 41 the sensor 28 is mounted in a mounting plate 370 which is connected to the external surface of the door D with the sensor 28 being accommodated in a hole or recess drilled in the door D. Securing screws H:\paulad\Keep\speci\CDS WORLDWIDE PTY LTD Door Lock.-CAP-doc.doc 13/03/01 42 372 can fix the sensor element 28 to the door via the plate 370 and lead wires 380 extend from the sensor 28 to the processing circuitry described with reference to Figure 32 for processing of signals received from the sensor 28 when a touch button is presented to the sensor 28.

In this embodiment of the invention a conventional key hole and key lock may be included in the locking device behind the sensor 28 so that if the electronic componentry should completely fail, the sensor 28 can be drilled out or otherwise removed by a repair person and the key used to override the lock and cause the locking element 305 to be retracted so that the door can be opened.

In still further embodiment an override key opening can be provided in the lock which engages with the roller wheel 352 and which can be rotated so as to rotate the limb 350 S"to drive the plate 306 and locking element 305 to the withdrawn position. A cut-out 311 is provided in the plate 306 to accommodate movement of the plate 306 relative to the key which will be inserted into and out of the plane of the paper in Figure 40 so as to rotate the link 350. This key can therefore be used in the event of a complete failure of the lock to enable the door to be opened. The key according to this aspect of the embodiment will be a convention cut key and not an electronic key and the key may engage a barrel which is fixed onto the wheel 352 by a bar (not shown) or any other suitable means so that when the key is inserted the wheel 352 is rotated to rotate the limb 350 to open the door.

In other embodiments of the invention (not shown), the key for opening the door in usual circumstances may be in the form of a remote key which outputs an infrared or Rf signal which is received by a receiver to actuate the door lock.

Thus, in this embodiment the key may be in the form of a transmitter for transmitting the Rf or infrared signal and H:\paulad\Keep\speoi\CDS WORLDWIDE PTY LTD Door Lock.-CAP-doc.doc 13/03/01 43 the sensor 28 replaced by a receiver for receiving the signal. The signal is transmitted to the microprocessor in the same as previously described and compared to predetermined signals so that the processor can decide whether to output the signal to unlock the door.

According to this embodiment of the invention the striker plate with which the locking element 305 engages may include a roller which the locking element can engage during movement into and out of the striker plate to facilitate smooth and easy movement of the locking element into and out of the striker plate when the door.is to be opened and closed. Full details of the roller assembly are disclosed in our co-pending Australian provisional patent 0 15 application number PR1264, the contents of which are incorporated into this specification by this reference.

The deadlock mechanism employed in the embodiment of Figure may include a dead latch which is located on the 20 internal part of the lock and which is moveable by a user to prevent the handle from being opened from the inside.

This places the lock in a conventional deadlock condition and the lock will not be opened until a valid key is applied to the lock. In the embodiment of the invention a sensor pad is also provided on an internal surface of the lock so that user can use his or her key to unlock the deadlock from inside the premises.

The deadlock mechanism may also include a further deadlock button which prevents movement of the plate 306 and lock 305. This mechanism may comprise a button or bar which engages a part of the plate 306 such as the cut-out 390 so as to prevent movement of the plate 306 and locking element 305 even if a valid key is presented to the lock from the outside. This enables the lock to be closed by a person inside a premises and prevent access to someone even having a valid key which would otherwise open the lock. This H:\paulad\Keep\speci\CDS WORLDWIDE PTY LTD Door Lock.-CAP-doc.doc 13/03/01 44 deadlock mechanism can also engage a further cut-out (not shown) which can hold the locking element 305 in a retracted position if it is desired to move in and out through the door a number of times in a short period such as if furniture or the like is being moved into or out of a house so that it is not necessary to use a key or manipulate a handle everytime it is desired it pass through the door. The deadlock facility according to this aspect of the invention can be released simply by moving a button on the internal part of the lock upwardly so as to disengage from the cut-out (such as the cut-out 390) to release the plate 306 and therefore the locking element 305.

Since modifications within the spirit and scope of the invention may readily be effected by persons skilled within the art, it is to be understood that this invention is not limited to the particular embodiment described by way of example hereinabove.

o* o* oe o- H:\paulad\Keep\speci\CDS WORLDWIDE PTY LTD Door Lock.-CAP-doc.doc 13/03/01

Claims (49)

1. An electronic door lock for a door including; a lock element for engaging a co-operating lock element on a door frame, the lock element being moveable from a first position in which the lock element can engage the co- operating lock element to hold the door in a closed position and a second position in which the lock element is moved out of engagement with the co-operating lock element to enable the door to open; a lock element drive portion coupled to the lock element for moving the lock element from the first position to the second position; biasing means for biasing the lock element drive portion 15 and therefore the lock element towards the first position; a pivotally mounted link mounted for pivotal movement between a first link position and a second link position, the link engaging the drive portion so that when the link moves from the first link position to the second link 20 position the drive portion is moved by the link to drive the lock element from the first position to the second position; S: an electronic actuator for receiving a key, determining whether the key is authentic and for driving the link from the first link position to the second link position; a door handle which forms an internal handle when the door •lock is mounted on a door; and a second pivotally mounted link coupled to the door handle and engaging the drive portion, the second link being moveable from a third link position to a fourth link position upon operation of the door handle so the second link moves from the third link position to the fourth link position thereby driving the drive portion and therefore the locking element from the first position to the second position to enable a door to be opened.

2. The lock of claim 1 wherein the electronic H:\paulad\Keep\speci\CDS WORLDWIDE PTY LTD Door Lock.-CAP-doc.doc 13/03/01 46 actuator includes a touch button sensor for receiving a key in the form of a touch button, processing means for receiving signals from the sensor and determining whether the touch button is authentic, a motor coupled to the processing means so that upon determining the presence of an authentic key the processing means actuates the motor to cause the first pivotally mounted link to move from the first link position to the second link position.

3. The lock of claim 2 wherein the motor has an output shaft, a worm gear on the output shaft, a pin on the first link and engaging the worm gear so that when the motor is actuated and rotates in one direction the engagement between the pin and the worm gear move the pin along the worm gear and therefore causes the link to pivot from the first link position to the second link position, and where upon rotation of the motor in the opposite direction will cause the pin to move in the opposite direction because of engagement with the worm gear so that 20 the first link is pivoted from the second link position to S. the first link position. The lock of claim 3 wherein the link carries a *roller wheel and the roller wheel engages the drive portion to move the drive portion and therefore the lock element from the first position to the second position upon movement of the first link from the first link position to the second link position.

5. The lock of claim 4 wherein the drive portion is a slide plate and the drive portion has a first cut out, the roller wheel of the first link being received in the cut out and engaging an edge which defines the cut out so that upon movement of the first link from the first position to the second position the slide plate is driven by engagement of the roller wheel with the edge to move the plate and therefore the lock element from the first H:\paulad\Keep\speci\CDS WORLDWIDE PTY LTD Door Lock.-CAP-doc.doc 13/03/01 47 position to the second position.

6. The lock of claim 5 wherein the plate includes a second cut out and the second pivotally mounted link includes a roller wheel which engages in the second cut out and engages an edge which defines the cut out so that upon movement of the second link from the third link position to the fourth link position the plate is moved to move the lock element from the first position to the second position.

7. The lock of any one of claims 1 to 6 wherein the first link includes a biasing spring for biasing the link when in either the first link position or the second link oo position so that the pin is drawn into engagement with the worm gear, so that upon rotation of the worm gear the pin will engage with the worm gear and move along the worm gear *to move the first link between the first link and second link positions.

8. A door lock for engagement with a door fastening element having an inclined surface and an abutment surface, the door lock including; a locking menmber having and edge over which the inclined surface can ride to place the fastener into locking engagement with the door lock, and an engaging ooooo surface for engaging with the abutment surface to hold the fastener in a locked condition; biasing means for biasing the lock member into a locking position; and drive means for driving the locking member to a second position in which the edge and engagement surface are withdrawn away from the fastener so that the abutment surface and inclined surface can be released from the lock to open the door.

9. The door lock of claim 8 wherein the locking H:\pau1ad\Keep\speci\CDS WORLDWIDE PTY LTD Door Lock.-CAP-doc.doc 13/03/01 48 member comprises a locking plate and the edge comprises an edge of a cut-out in the plate, and the engagement surface comprises a surface of the plate adjacent the edge.

10. The lock of claim 9 wherein the cut-out is a hole formed in the plate, the hole having at least one generally straight edge which forms said edge.

11. The lock according to anyone of the preceding claims including a closure plate and biasing means for biasing the closure plate to close the opening when the fastener is retracted from the opening to unlock the door, and when the fastener locates through the opening to lock the door the closure plate is pushed against the bias of 15 the biasing means by the fastener to a retracted position.

12. The lock according to claim 11 including sensor S. means for sensing when the closure plate is in the retracted position to provide an indication that the 20 fastener is in a locking position within the lock.

13. The lock according to any one of claims 8 to 12 wherein the drive means comprises a motor carrying an eccentric, the eccentric engaging the locking member so that when the motor is rotated the eccentric is rotated to drive the locking member from the first position to the •second position, and wherein after a predetermined time the motor continues to rotate the eccentric to allow the locking member to return to the first position so that when the fastener is again engaged with the lock the incline surface will ride over the edge and the abutment surface will engage behind the engaging surface of the locking member to place the door into a locked conition.

14. The lock according to any one of claim 8 to 12 wherein the biasing means for biasing the locking member comprises a spring. H:\paulad\Keep\speci\CDS WORLDWIDE PTY LTD Door Lock.-CAP-doc.doc 13/03/01 49 The lock according to any one of claim 8 to 14 wherein the eccentric engages a contact plate attached to the locking member and extending generally perpendicular to the locking member.

16. A door lock including; a lock body including a locking mechanism; a lock element locatable in a locked position or an open position by the locking mechanism, and for engaging a co-operating lock element on a door frame; and wherein the door lock is formed as a unitary body for location in a recess of a door without the need to assemble the door lock in order to install the door lock in the 15 recess of the door.

17. The lock of claim 16 wherein the lock body .i includes a first flange for resisting movement of the door from a closed position of the door to an open position of 20 the door, relative to the lock body.

18. The lock of claim 17 wherein the flange is formed on a lug which extends outwardly of the lock body.

19. The lock of any one of claims 16 to 18 wherein the lock body includes a front face having an integral peripheral flange which resists movement of the door relative to the lock body in the closing direction of the door. The second flange resists an attempt to break the lock by applying force to the door from the outside. The lock of claim 17 wherein the lock includes two lugs, each lug carrying a first flange.

21. The lock of claim 17 wherein the first flange is locatable in a groove formed in the door so that a portion of the door is sandwiched between the first and second H:\paulad\Keep\speci\CDS WORLDWIDE PTY LTD Door Lock.-CAP-doc.doc 13/03/01 50 flanges. However, in another embodiment the first flange may be abutted behind the door so the entirety of the door is sandwiched between the first and second flanges.

22. A door lock including; a lock body including a lock mechanism; a lock element locatable in a locking position or an openable position by the locking mechanism, and engagable with a co-operating lock element on a door frame; a first flange formed on the lock body for resisting movement of the door relative to the lock body if an attempt is made to move the door relative to the lock body from the closed position of the door to an open position of the door.

23. The lock of claim 22 wherein the first flange is I. formed on a lug which extends outwardly of the lock body. v.

24. The lock of claim 23 or 23 wherein the lock body 20 includes a front face having an integral peripheral second flange which resists movement of the door relative to the lock body in the closing direction of the door. The second flange resists an attempt to break the lock by applying force from the interior of the building.

25. The lock of claim 23 wherein the lock includes two lugs, each lug carrying a first flange.

26. The lock of claim 22 wherein the first flange is locatable in a groove formed in the door so that a portion of the door is sandwiched between the first and second flanges.

27. A door lock and lock catch combination, including; a rotary lock element on the door lock, the rotary lock element having a plurality of radially H:\paulad\Keep\speci\CDS WORLDWIDE PTY LTD Door Lock.-CAP-doc.doc 13/03/01 51 extending rounded spokes; a lock catch element for co-operating with the rotary lock element, the catch element including a cavity for receiving the rotary lock element, the cavity having a surface portion for engaging one of the rounded spokes and causing rotation of the rotary lock element, and a recess communicating with the cavity so that the rotary lock element rotates as it moves into the cavity to locate one of the rounded spokes in the recess to thereby lock the rotary lock element to the catch element to place the door lock and catch element in a closed condition; a locking mechanism for allowing rotation of the locking element in a first direction so that the locking o0°0°: element can rotate into the cavity in the catch element, 15 and selectively preventing rotation of the lock element in ease a reversed direction to prevent the lock element from rotating out of the cavity and placing the lock in a locked o6 condition; and a lock release mechanism for releasing the o. i 20 locking mechanism to allow rotation of the rotary lock 6606 element in the reverse direction so that the rotary lock element can rotate out the cavity so as to unlock the rotary lock element from the catch element. 4606

28. The lock of claim 27 wherein the rotatory lock 00.6 :°":element carries a ratchet wheel and the lock mechanism ooo includes a lock tooth for engaging the ratchet wheel to allow rotation of the ratchet wheel and therefore the rotary lock element in the first direction but preventing rotation of the ratchet wheel and the rotary lock element in the reverse direction.

29. The lock of claim 28 wherein the tooth is located on a locking plate and biasing means is provided for biasing the locking plate into a first position where the tooth engages the ratchet wheel. H:\paulad\Keep\speci\CDS WORLDWIDE PTY LTD Door Lock.-CAP-doc.doc 13/03/01 52 The lock of claim 27 wherein drive means is provided for driving the tooth from the position engaging the ratchet wheel to a position released from the ratchet wheel to enable the ratchet wheel and therefore the rotary locking element to rotate in the reverse direction.

31. The lock of claim 30 wherein the drive means comprises an electric motor for rotating an eccentric, the eccentric engaging the plate to move the plate against the bias of the biasing means to a second position in which the tooth is removed from the ratchet wheel.

32. The lock of claim 29 wherein sensing means are ooooo provided for sensing whether the plate and therefore the tooth is in the first position engaged with the ratchet wheel or the second position removed from the ratchet wheel.

33. The lock of claim 31 wherein actuating means is provided for receiving a key, so that when a valid key is presented to the actuating means, the actuating means actates the motor to drive the eccentric and therefore the *plate and tooth from the first position to the second position to open the door lock.

34. The lock of claim 33 wherein a reader is provided for reading the key. The lock of claim 34 wherein a micro-processor is included for controlling the reader and actuating the motor.

36. The lock of any one of claims 29 to 34 wherein a handle is provided on the lock for enabling the lock to be unlocked by a movement of the handle.

37. The lock of claim 36 wherein a lever mechanism is H:\paulad\Keep\speci\CDS WORLDWIDE PTY LTD Door Lock.-CAP-doc.doc 13/03/01 53 coupled to the handle so that when the handle is moved to open the lock, the lever mechanism moves the tooth from the first position to the second position, against the bias of the biasing means, to thereby allow rotation of the ratchet wheel and the rotary lock element in the reverse direction, so the rotary lock element can be removed from the recess in the catch element.

38. The lock of claim 37 wherein a deadlock mechanism is provided for preventing movement of the lever mechanism so that the lock can be deadlocked and prevented from being opened by the handle. ooooo S39. The lock of claim 38 the deadlock mechanism comprises a locking member for preventing movement of the lever mechanism. The lock of claim 39 wherein the locking member comprises at least one plug member moveable from a first 20 position in which it enables movement of the lever oooo mechanism to a second position in which it prevents movement of the lever mechanism upon movement of the handle.

41. The lock of claim 40 wherein a deadlock lever mechanism is provided for locating the plug in the first position in which the deadlock mechanism is not actuated to allow opening of the lock upon movement of the handle, and whereupon the deadlock lever mechanism is releasable to allow the deadlock lever to move to a second position so the plug can move to the second position which prevents movement of the lever mechanism.

42. The lock of claim 41 wherein a push button is coupled to the deadlock lever mechanism for moving the deadlock lever mechanism to the second position. H:\paulad\Keep\speci\CDS WORLDWIDE PTY LTD Door Lock.-CAP-doc.doc 13/03/01 54

43. The lock of claim 42 wherein the deadlock lever mechanism includes an abutment portion engagable by the eccentric when the deadlock lever mechanism is in the second position and the eccentric rotates so that upon presentation of a valid key and actuation of the motor, rotation of the eccentric moves the deadlock mechanism to move the plug to the first position whereby the handle will move the lever mechanism to enable opening of the door.

44. A door lock for a door, including; a lock element for engagement with a co-operating lock element on a door frame to hold the door in a closed position; a lock element release member moveable from a *oo. 15 first position in which it retains the lock element in a locked position so that when the lock element engages the co-operating element the door is locked in the closed position, to a second position in which the lock element is placed in an unlocked condition so the lock element can be removed from the co-operating element to enable the door to be opened; biasing means for biasing the lock element release member towards the first position to retain the lock element in the lock condition; 25 drive means for moving the lock element release member from the first position to the second position upon presentation of a valid key to the door lock, against the bias of the biasing means; a door handle on the lock which, when the lock is installed in a door, is located on the interior side of the door; a lever mechanism coupled to the door handle and to the lock element release member for moving the lock element release member to the second position against the bias of the biasing means so that the lock element is placed in the unlocked condition to enable the door to be opened; and H:\paulad\Keep\speci\CDS WORLDWIDE PTY LTD Door Lock.-CAP-doc.doc 13/03/01 55 deadlock means for engaging the lever mechanism to prevent movement of the lever mechanism so that the lever mechanism cannot move the lock element release member to the second position to unlock the door, and thereby placing the lock in a deadlock condition; and the deadlock means being engagable by the drive means upon presentation of a valid key to the door lock, to move the deadlock means so as to release the deadlock means from the lever mechanism to release the deadlock. The lock of claim 44 wherein the lock element comprises a rotary lock element and the co-operating element is a catch element, engagement between the lock S"element and the catch element causing rotation of the lock element so the lock element rotates into the catch element to be retained by the catch element. S"46. The lock of claim 45 wherein the lock element release member, in the firstposition, allows rotation of .o.ooo .20 the rotary lock element in a first direction but prevents rotation in the second direction so that the rotary lock element cannot rotate out of the catch element thereby locking the lock element to the catch element. 25 47. The lock of claim 44 wherein the lock element includes a ratchet wheel, and the lock element release member includes a ratchet tooth for engaging the ratchet tooth to allow rotation of the lock element in the first direction but prevent rotation of the lock element in the reverse direction.

48. The lock of claim 44 when the lock element is in the second position, the tooth is removed from the ratchet wheel thereby allowing the lock element to rotate in the reverse direction so that the lock element can rotate out of the catch element to release the lock element from the catch element. H:\paulad\Keep\speci\CDS WORLDWIDE PTY LTD Door Lock.-CAP-doc.doc 13/03/01 56

49. The lock of claim 44 wherein the lock element comprises a recess in the lock element release member for engaging a catch hook connected to a door frame so that in a first position of the lock element release member the catch hook engages through the opening and locks the behind the opening to prevent separation of the catch hook from the lock element and in the second position the opening is aligned relative to the catch hook so as to enable the catch hook to pass out of the opening so that the lock element can be released from the catch hook to enable opening of the door. 50 The lock of claim 44 wherein the drive means includes a motor having an output shaft, and an eccentric cam located on the output shaft for engaging the lock element release member so that upon actuation of the motor the eccentric cam is rotated to engage the lock element release member and force the lock element release member to "20 the second position against the bias of the biasing means. o

51. The lock of claim 50 wherein the motor holds the eccentric cam in position so as to hold the lock element release member at the second position for a predetermined time period, and thereafter continues rotation to enable the lock element release member to be returned to he first position by the biasing means.

52. The lock of claim 44 wherein the handle is coupled to an arm, the arm having a spring for biasing the arm and the handle into a closed position; the lever mechanism including a bar coupled to the arm, a lever pivotally mounted to the door lock and having a first lever arm which is pivotally connected to the bar and a second lever arm, the second lever arm being engagable with the lock element release member so that upon movement of the door handle the arm is moved against the H:\paulad\Keep\speci\CDS WORLDWIDE PTY LTD Door Lock.-CAP-doc.doc 13/03/01 57 bias of the spring to draw the bar and the therefore rotate the lever about the pivot so that the second lever arm contacts the lock element release member and pushes the lock element release member to the second positions against the bias of the biasing means to thereby place the lock element in the unlocked condition so the door can be opened.

53. The lock of claim 52 wherein the second lever arm engages the lock element release member by projecting through an opening in the lock element release member.

54. The lock of claim 44 wherein the deadlock means .oeo0i S"includes a pivotally mounted deadlock lever having a first portion the first portion of the deadlock lever in a first position of the deadlock lever, engaging a locking means for holding the locking means in a release position whereby S"the handle and the lever mechanism can move to place the lock element in the unlocked condition, and whereupon the oooo• 20 deadlock lever is moveable to a second position whereby the lock means is released to move to a locking position to lock the lever mechanism to prevent movement of the lever mechanism thereby preventing movement of the lock element release member to the second position and placing the door 25 lock in deadlock condition. The lock of claim 44 wherein the lock means comprises at least one plug which is spring biased towards the deadlock lever so that when the deadlock lever is moved to a second position the plug is biased to a locking position where it prevents movement of the lever mechanism.

56. The lock of claim 54 wherein the deadlock mechanism also includes a retainer member which retains the deadlock lever in the first position and, upon actuation of the retainer member, allows the deadlock lever to move to the second position to place the lock in the deadlock H:\paulad\Keep\speci\CDS WORLDWIDE PTY LTD Door Lock.-CAP-doc.doc 13/03/01 58 condition.

57. The lock of claim 56 wherein the retainer member comprises a control member spring biased into a first position, a pivotally mounted rocker bar engaged by the control member, the rocker bar being pivotally coupled to a spring biased lock bar which in a first position prevents movement of the deadlock lever to the second position and upon actuation of the control member, the rocker bar is pivoted to draw the lock bar away from the deadlock lever so that the deadlock lever is pushed by the spring biased lock means to the second position to place the lock in a deadlock condition.

58. The lock of claim 57 wherein the deadlock lever has an end portion arranged adjacent the drive means so that when the lock is in the deadlock position and a valid key is presented to the lock, the drive means engages the end portion of the deadlock lever to force the deadlock 20 lever back to the first position to return the lock means to the position where the lever mechanism is released to place the lock in the non-deadlocked condition.

59. The lock of claim 44 wherein the lock element release member comprises a moveable plate, a tooth being formed on the plate for engagement with the lock element to retain the lock element in the lock condition when the plate is in the first position.

60. A door lock for a door including; a lock element for engagement with a co-operating lock element on a door frame to selectively lock the door in a closed position; a handle pivotally mounted to the door lock for movement from a first position to a second position away from the door lock about the pivot; a door unlock member coupled to the handle and H:\paulad\Keep\seci\CDS WORLDWIDE PTY LTD Door Lock.-CAP-doc.doc 13/03/01 59 having a retainer element for engaging the lock element to maintain the lock element in a lock condition; and wherein when the handle is moved from the first position to the second position the lock release member is moved to disengage the retainer member from the lock element so that the lock element is released to place the lock element in an unlocked condition so the lock element can be withdrawn from the co-operating element to enable the door to be opened.

61. A lock substantially as hereinbefore described with reference to any one of the embodiments shown in the accompanying drawings. S. Dated this 13th day of March 2001 CDS WORLDWIDE PTY LTD By their Patent Attorneys GRIFFITH HACK Fellows Institute of Patent and Trade Mark Attorneys of Australia H:\paulad\Keep\speci\CDS WORLDWIDE PTY LTD Door Lock.-CAP-doc.doc 13/03/01