Patent Publication Number: US-6217087-B1

Title: Lock mechanism

Description:
This is a divisional of application Ser. No. 08/763,241 filed on Dec. 10, 1996, now U.S. Pat. No. 5,890,751 which is a divisional of application Ser. No. 08/350,662, filed Dec. 7, 1994, now U.S. Pat. No. 5,620,216. 
     RELATED APPLICATION 
     This is a continuation-in-part of application Ser. No. 08/309,843, filed Sep. 20, 1994, which is a continuation-in-part of application Ser. No. 07/969,771, filed Oct. 30, 1992, now abandoned. 
    
    
     BACKGROUND OF THE INVENTION 
     The present invention is directed to an improvement in locks and locking mechanisms. A flush bolt system for cylindrical lock sets is supplied by the present invention which includes anti-jimmying or anti-forcing features, and an ability to automatically lock several bolts simultaneously. 
     Doors are used to secure openings through exterior and interior walls, fences or other enclosures. Typically, the door is semi-permanently attached to the wall in a manner which permits the door to be moved with respect to the opening to permit passage there through, and then permit easy and fast repositioning of the door to reclose the opening. This may be accomplished by the use of hinges on one of the stiles of the door, or the door may be located on rollers, or may hang on rollers or be otherwise movable. In each instance, the hinges, or rollers, allow the door to be moved with respect to the opening, while maintaining the door in alignment to reseal the opening. 
     To secure the opening against undesirable or unwanted entry, the door is provided with a lock. This lock is intended to secure the door to close the opening until the lock is actuated to an unlocked status to allow the door to be moved to an open position. Such locks come in a multitude of forms, and include outside sliding latches, sliding flush mounted bolts, handled latch sets, and keyed locksets. Commonly, many such systems can be utilized in openings having multiple swinging doors to obtain proper securing of the door in the opening. 
     Double, or french, doors present additional problems for the door designer from the aspect of securing, or locking, the door in position. These doors are hingedly connected to a frame and meet in the middle of the frame opening. Each is commonly configured to move independently of the other, and they must be sized, and hung in the opening, with clearance therebetween for free movement in the frame but also with insufficient clearance to permit easy jimmying or prying of the doors apart. Further, to securely interlock the doors into the frame a mere bolt therebetween is insufficient. A bolt secured in one door, and extending a short distance into the other door, will not prevent motion of the doors about their hinges. To accomplish this task, an upper, and/or lower, vertical or “flush” bolt is provided which is actuatable out of the top and/or bottom of at least one of the doors and into adjacent frame members. These bolts prevent motion of the door relative to the frame when in the extended or actuated position. 
     The actuation of flush bolts into the door frame and floor, and accompanying actuation of the deadbolt, presents several problems to the door lock supplier. Most doors are less than three inches in width, and many modern doors are less than two inches wide. For aesthetic purposes, most lock specifiers and secondary market users require that all of the door hardware, except the handles and keyways, fit inside of, or on, the door in such a way as to minimize the exposed parts thereof. Additionally, by keeping exposed parts to a minimum, the ability of thieves or burglars to break the lock and gain entry through the door is minimized. Thus, mainly in industrial, commercial or institutional applications will exterior lock components be acceptable, and then only on the interior side of the door. Therefore, in many instances, the door lock manufacturer must supply a lock and actuation members which physically fit inside the door, leaving only handles and plates exposed. Such an installation commonly includes a lock case containing the lock actuation members, which fits into a pocket extending inward the side of the door, or a lockset, each having a pair of knobs extending from the faces of the door. 
     In addition to the size limitations on door hardware imposed by the size of the door, designers are faced with increasing government regulation which affects the flexibility of hardware selection common in the past. For example, in most public facilities doors must be wheelchair accessible. In that instance, when french doors are used, they must be operable by a person sitting in a wheelchair. Likewise, to increase security, doors may include mortise locks to further secure them in their frame, in the form of surface or flush mounted locks which are vertically located at the top and bottom of the door. This forecloses the use of manual flush bolts or surface bolts on the door which are disposed adjacent the top of the door, as they are out of reach of the wheel chair bound. Therefore, there exists a need for a retrofitable door lock for use in french doors, which will allow, with the turn of a single handle, the opening of both the top and bottom flush bolts. 
     In addition to the problems encountered with the design of accessible double door locks, the designer must include anti-theft devices to minimize the ability of thieves or others to bypass the lock and gain entry through the door. 
     Many doors are fitted with a rotary handle lock, commonly having retracting jaws therein which engage the rear of a bolt. These locks are installed by drilling a hole through the door adjacent the lock stile thereof, and then drilling a cross hole into the lock stile which enters the first hole. The handle lock, with the jaws, is fitted in the first hole with the jaws disposed in alignment with the cross hole, and the bolt is received through the cross hole and engaged with the jaws. Turning of the handle causes the jaws to retract into the handle lock, thus retracting the bolt into the door. As the bolt is biased to a position extending from the door, the bolt head is chamfered so that as the door closes, the chamfered portion engages a strike plate on the doorjamb, and further closing movement of the door causes the bolt to retract inward the door. Where locking is required, the inner knob will typically include a lock tab and the outer knob will include a keyed access. The outer knob is locked against movement by actuating the lock tab in the inner knob to the locked position, thereby preventing turning of the keyed handle. In this position, entry may not be gained by turning the handle to retract the bolt. However, the rotary drive commonly does not include any means of preventing retraction of the jaws which initially actuate the bolt in response to handle movement, and such devices are therefore easily forced. Thus, even where the handle is locked against rotary motion, the bolt may be forced inward the door by exerting inward pressure on the extended portion of the bolt. If further security is required a secondary, keyed, deadbolt can be installed by drilling a second set of holes in the door. 
     Another lock configuration is the mortise lock. These locks are disposed in a case, and the door must be mortised to receive the case. A hole drilled through the face of the door receives handles received into a mortise case. Mortise locks can include a secondary deadbolt lock therein. External knobs control movement of the latch extending outward through the door butte stile from the case. 
     An additional problem with lock sets which incorporate retractable non-locking jaws occurs as a result of the relatively tight alignment tolerances of the jaws and the latch bolt. Typically, a retractable, non-locking jaws type of handle set includes an inner and an outer handle, one of which may be keyed, and a cylindrical housing in which the retractable non-locking jaws are located. The latch bolt is typically housed within a cylindrical housing, and it includes an extending portion which is engaged by the jaws. When a handle is turned, the jaws housing must remain stationary, and the jaws are retracted inwardly of the jaws housing to retract the latch bolt inwardly of the end of the door. 
     To provide the alignment of the latch bolt and the jaws, a latch bolt bore is drilled into the end of the door, and a handle bore is drilled through the faces, i.e., through the main panel portion, of the door. If the axes of these bores intersect and are perpendicular, the jaws and the latch bolt will be in perfect alignment, and the latch bolt will move freely in response to motion of the jaws. This occurs because the jaws move linearly back and forth within the jaws housing, and they therefore provide a vector which is collinear with the axis of movement of the latch bolt to move the latch bolt in the housing. However, if the bores are substantially out of alignment, either as a result of an offset between the two axes and/or a non-perpendicular relationship between the two axes, the jaws will engage the engagement portion of the latch bolt, but the force vector provided by the jaws will not be collinear with the linear axis of motion of the latch bolt. As a result, the jaws will impose a side load on the latch bolt, which, in turn, may cause the latch bolt to bind. 
     SUMMARY OF THE INVENTION 
     The flush bolt system of the present invention operates in conjunction with a handle, knob or other actuating device which includes a lockout mechanism, such as a “key in knob” or cylindrical lock thereon, which is disposed adjacent a mortised lock component case. In one embodiment of the invention. The handle, knob or other mechanism actuates a guide member having pinch pulls thereon, also known as retractable, non-locking jaws, to move an actuating arm extending out the rear of the case which is engaged with the pinch pulls. This actuating arm when moved by the pinch pulls or jaws, actuates a lock bolt disposed in the case in and out of a door-jamb, and simultaneously actuates one or more flush bolts in the door. 
     The bolt may include a dual, sliding element, latch bolt member which includes a lock bar inserted therethrough configured to engage and lock one of the elements of the latch bolt into position when the latch bolt is extended into the door jamb. The locking element of the latch bolt preferably includes a slot into which the bar protrudes. When the latch bolt is fully extended out of the door, the bar end engages the inside of the slot to prevent movement of the locking element inward the door absent motion of the handle or knob. The second element of the dual element latch bolt is a lock bar actuator which is interconnected to the guide member pinch pulls for direct movement with respect to the guide member, and includes a lost motion connection to interconnect to the locking element. The lost motion connection permits each of the individual elements of the dual element latch bolt member to move a slight distance independently of the other. The lock bar actuator further includes a lock bar slot therethrough, through which the lock bar projects. When the guide member is actuated to insert the latch bolt into a door jamb, i.e., to lock the door, the entire bolt moves forward out of the door towards the jamb and the lock bar slot actuates the end of the lock bar into position within the lock bar slot adjacent one end thereof. If the end of the latch bolt projecting outward through the door and into the jamb is pushed inward, the lost motion connection between the parts will allow the locking element to move inward the door slightly, without corresponding movement of the lock bar actuator. This motion causes the end of the slot in the locking element to engage the lock bar, and further inward movement of the locking member, and latch bolt, will not occur. To open the door, the latch bolt is retracted by actuating the handle, knob, or other actuating mechanism to move the guide member inward, thereby pulling the lock bar actuator inward. The slot in the lock bar actuator engages the lock bar along its shank, pulling the end thereof out of the slot in the locking element. The lost motion of the lost motion connection is overcome, and the latch bolt retracts from the door. In the foregoing manner, a lock is provided with a retraction prevention mechanism which is easily usable within the confines of a preexisting lock envelope. 
     To actuate flush bolts into the upper door jamb and floor, as is sometimes desirable with a pair of doors which meet in the middle such as French doors, or for further security in single door applications, the latch bolt member is provided with a gear rack on the lock bar actuator. This gear rack interconnects to a geared lever, which is gimble mounted to the case and includes a finger extending outward from a central arcuate portion. The geared lever serves to translate the horizontal motion of the latch bolt actuating arm to vertical motion to actuate the flush bolts. The central arcuate portion of the geared lever includes teeth which engage the teeth on the gear rack. As the gear rack actuates back and forth, the arcuate portion of the geared lever rotates, and the finger which radiates therefrom moves up and down. Each of the flush bolts is interconnected to a separate finger through a bolt assembly. Each flush bolt assembly includes a retract detent to maintain the flush bolt system in the retracted position when the door is in an open position, and a bias member to maintain the flush bolt system in the extended position unless the door handle is moved to open the door. Thus, both upper and lower flush bolts, and a latch bolt, may be operated by simply turning a handle. 
     The lock mechanism, when used in conjunction with a common keyed knob set, is biased to the locked position by the structure of the knobset. Such knobsets are commonly structured such that the retracting jaws thereof are always biased to an extended position, to extend the single piece latch bolt extending therefrom to a frame engaging position, but permitting inward movement of the latch bolt both when the handles are turned or the bolt is pushed inward the door. In the present invention, the flush bolt retract detent maintains the flush bolts, and deadbolt linked thereto, in a retracted position until the detent is actuated manually or by closing the door. Once the flush bolt or latch bolt is actuated, it may only be retracted by turning the knob or handle, and each will not retract fully inward the door in the event inward directed force is placed on the extended portions thereof. 
     To align the jaws with the actuating arm to ensure non-binding movement of the actuating arm and jaws, the case is preferably extended rearwardly of the engagement portion of the actuating arm, to enable the placement of an opening through the case to provide assured alignment between the jaws and the actuating arm and also ensure that the linear motion of the jaws is co-linear with the linear motion of the actuating arm. Although in the preferred embodiment the case is used in conjunction with the dual, sliding, element latch bolt member, the alignment advantages of the case are useful with any lock system, including standard single element latch or dead bolts, wherein the bolt is operated by a pull member, such as the retractable, non-locking jaws, and alignment between the pull member and the bolt is critical. 
    
    
     These and various other features and advantages of the invention will be readily apparent to those skilled in the art upon reading the following detailed description and referring to the accompanying drawings. 
     BRIEF DESCRIPTION OF THE DRAWINGS 
     For an introduction of the detailed description of the preferred embodiment, reference will now be made to the accompanying drawings, wherein: 
     FIG. 1 is a plan view of a pair of doors using the lock mechanism of the present invention; 
     FIG. 2 is a side view of the female lock mechanism of the present invention in a retracted, or unlocked, position; 
     FIG. 3 is a side view of the male lock mechanism of the present invention in a locked position; 
     FIG. 4 is a sectional view of the latch bolt of the lock mechanism of FIG. 3 at  4 — 4 ; 
     FIG. 5 is a side view of the male lock mechanism of FIG. 3 actuated to the open, or unlocked, position; 
     FIG. 6 is an end view of a door of FIG. 1 partially in cutaway moved to the open position showing the arrangement of the lock of the present invention therein; 
     FIG. 7 is a sectional view of a portion of the lock disposed in a door of FIG. 6 at a section  7 — 7 ; 
     FIG. 8 is a side view of an alternative lock mechanism; 
     FIG. 9 is a transverse section through a door having a channel and flush bolt mounted therein; 
     FIG. 10 is a sectional view of an alternative embodiment of the invention, wherein the case is modified to include an extending portion through which the housing extends; 
     FIG. 11 is an exploded view of the lock mechanism of FIG. 10 received in a door. 
    
    
     BRIEF DESCRIPTION OF THE PREFERRED EMBODIMENT 
     The present invention provides a lock for mounting in one or more doors  12 ,  14  which includes at least one case having means therein for positioning one or more bolts within the door between extended and retracted positions, and a handle set having a motion transfer mechanism such as retractable, non-locking jaws, which are connected to an actuation portion of the bolt members to provide motion to the bolt members to position them in extended and retracted positions. The case is configured with an alignment means, such as a hole therethough, in which the housing which houses the motion transfer mechanism is received, and which permits alignment of the drive member with the actuation portion to provide combined, non-binding, movement thereof. 
     Referring to FIG. 1, the doors  12 ,  14  are shown pivotally retained within a door frame, or jamb,  16  in wall  18 . Each door includes a butte stile  22 , attached to the frame  16  by a plurality of hinges  24 , upper and lower rail portions  26 ,  28  extending across the opening enclosed by doors  12  or  14 , and a lock stile  30  disposed substantially parallel to the butte stile  22  and supported therefrom by rail portions  26 ,  28 . Although doors  12 ,  14  are described as solid doors, the invention may be used in conjunction with any door having an area forming a lock stile to receive the lock. Thus, doors  12 ,  14  may be panel or hollow core doors without panels, or other configurations may be used. In a panel door configuration, one or more panels  32  may be disposed within the area circumscribed by rail portions  26 ,  28  and stiles  22 ,  30 . 
     Doors  12 ,  14  are disposed within frame  16 . Frame  16  includes side jambs  34 ,  36  disposed at opposed ends of an upper rail or header  38 , extending downward therefrom at a substantially right angle thereto. Jambs  34 ,  36  terminate at floor  40 , or alternatively, at a door step or sill  42 . Jambs  34 ,  36  are typically anchored to a wall  18 , or other structural feature, in which the doors  12 ,  14  are located. The butte stile  16  of each door  12 ,  14  includes hinge  24  attached thereto, which is interconnected to the door jambs  34 ,  36  and thereby frame  16 , to secure doors  12 ,  14  thereto but to permit them to be actuated with respect thereto. Jambs  34 ,  36 , and header  38  may also include a stop thereon (not shown), which is a projecting portion thereon which limits movement of doors  12 ,  14  such that each door  12 ,  14  will open only in one direction. Header  38  is sized so that lock stiles  30  align when doors  12 ,  14  are closed, with a clearance space  44  therebetween. In this configuration, doors  12 ,  14  are commonly known as french doors. Other door configurations may also be employed without deviating from the scope of the invention. For example, horizontally split two piece doors, commonly known as dutch doors, a single door in a frame, or other configurations may also be employed without deviating from the scope of the invention. 
     To secure doors  12 ,  14  within frame  16  in the closed position shown in FIG. 1, lock set  50  is provided, which includes first female lock  52  and second, male lock  54  therein. Each of locks  52 ,  54  include an upper header, or flush bolt  158  and a lower flush bolt  158 . A double sided latch bolt  56  (shown in FIG. 3) is included in male lock  54  in door  14 . Each of locks  52 ,  54  are configured to engage into header  38  and floor  40 , respectively, and bolt  56  is configured to extend from door  14  and into a latch cutout  58  in door  12 . To actuate locks  52 ,  54  and thereby latch bolt  56  and flush bolts  158 , keyed handles  63  are provided on either side of doors  12 ,  14  and are directly connected to locks  52 ,  54  as shown in FIGS. 2 and 3. In most situations, only handles  63  on one side of doors  12 ,  14  include a key way, and the movement of that handle is governed by insertion of a key inward the key way to unlock the handle, while the handle on the opposite side of the door may be moved without the use of a key. 
     Referring now to FIGS. 2,  3  and  7 , lockset  50  is shown within doors  12 ,  14 , and includes locks  52  and  54 . Each of locks  52 ,  54  includes a pair of flush bolt throw mechanisms  60 ,  61  and releasable flush bolt retainer mechanisms  64  mounted within a case  51 , which are actuated by a rotary drive member  66  disposed adjacent case  51 . Flush bolt throw mechanisms  60 ,  61  actuate flush bolts  158 . Drive member  66  is well known in the art, and translates rotary motion from a knob handle  63 , or other input into translational motion to actuate a lock mechanism. One such mechanism is shown and described in U.S. Pat. No. 1,751,101, Schlage, which is fully incorporated herein by reference as if fully set out herein. Drive member  66  may be a set of pinch pulls  68  extending from a housing disposed intermediate of the handles  63  located on either side of the doors  12  or  14 . Pinch pulls  68  serve as a motion transfer mechanism to engage a lock actuating mechanism  70 , which actuates flush bolt throw mechanism  60 ,  61  and thereby double-sided latch bolt  56 . 
     Referring now to FIGS. 3,  4 , and  7  double-sided latch bolt  56  is disposed adjacent drive member  66  and includes a first plate  72  and a second plate  74 , interconnected by a pair of pins  76 ,  78 . Each plate further includes a slot portion  80 ,  82  therein, each of which receive a pin  76  or  78 . Pin  76  is rigidly received in first plate  72 , and extends into slot  80 . Pin  78  is rigidly received within second plate  74 , and extends into slot  82 . Each pin  76 ,  78  includes an enlarged head portion  84 , which maintains pin  76 ,  78  in slot portion  80  or  82 , and thereby plates  72 ,  74  in position adjacent to each other. Slots  80 ,  82  are collinear, so that plates  72 ,  74  may move longitudinally with the long axis of each slot  80 ,  82 . 
     First plate  72  further includes a first actuated portion  85 , an opposed latch portion  86  and an intermediate locking member portion  87  disposed intermediate of latch portion  86  and first actuated portion  85 . Latch portion  86  is configured and arranged to actuate out of door  14  to engage into door  12 , and includes double-sided latch member  65  biased by a spring  88  which is grounded against a cross bar member  90  on second plate  74 . Alternatively, the spring  88  may extend between the double-sided latch member  65  and the lock case. Double-sided latch member  65  is a generally triangular member, having apex  92  extending furthest from spring  88 , base  94  which bears upon spring  88 , and equilateral-canted sides  96  which extend from apex  92  to base  94 . Slot  80 , with pin  76  therethrough, is circumscribed by spring  88 . Alternatively, the spring  88  may extend between the inner end of the double sided latch member  65  and the case, to bias the bolt member  65  outwardly of the case. 
     Second plate  74  includes a toothed shank portion  100  bounded at one end in a first engagement portion  102  and at another end in an extending portion  104 . Toothed shank portion  100  includes a series of gear teeth  106  along on both upper and lower edges  107 ,  109  thereof, and a lock bar control slot  108  therethrough. Pin  76  is received in extending portion  104  through slot  80 , and slot  82  is disposed in first actuated portion  85 . As latch bolt member  65  spans the distance between butte stile  22  of door  12  or  14  and rotary drive member  66 , and latch bolt  56  is comprised of a pair of plates  72 ,  74 , each having the ability to move with respect to the other, each of the plates  72 ,  74  is shorter than the span between rotary drive member  66  and the ultimate extended length of bolt member  56 . To permit ultimate extension of bolt member  56  and cocommitment retraction thereof, a gap  73  is provided between the end of each of plates  72  or  74  and the adjacent portion of either of plate  72  or  74 . This gap  73  is at least as long as slot  80  or  82 , and allows actuation of one of plates  72 ,  74  with respect to the other of plates  72 ,  74 . Thus, pins  76 ,  78 , gaps  73  and slots  80 ,  82  form a lost motion connection which is actuated during inward directed forcing of bolt member  56 . 
     To partially control the movement of latch bolt member  56 , case  51  includes a pivot  110  having bar  112  disposed therein in a gimble mount  111 , such that bar  112  may be pivotally moved about pivot  110 . Bar  112  includes a first, gimble receiving portion  114  arcuately secured within pivot  110 , an extending portion  116  extending outward therefrom and a locking end portion  118  forming the terminus of bar  112 . Bar  112  and pivot  110  are disposed adjacent lockout bar control slot  108  and intermediate locking portion  87 , such that extending portion  116  is received therein. Intermediate locking portion  87  is configured as an aperture. 
     Referring now to FIGS. 3,  4 , and  5 , the interaction of bar  112  and latch bolt member  56  is shown. In FIGS. 3 and 4, latch bolt member  56  is shown in the actuated, or locked position, wherein opposed latch portion  86  thereof is actuated outward beyond the edge of door  14  such that double sided latch member  65  may be received within door  12  or otherwise secure door  14  in a locked position. In FIG. 5, latch bolt member  56  is shown retracted into door  14  such that double sided latch member  65  does not extend outward beyond lock stile  30 , to allow the door to move about hinges  16  (FIG. 1) without interfering with the adjacent door  12 . 
     When latch bolt member  56  is in the position shown in FIGS. 3 and 4 with double-sided latch member  65  thereof extending outward beyond lock stile  30 , extending portion  116  of bar  112  extends through lockout bar control slot  108  and locking end portion  118  terminates within the aperture formed by intermediate locking portion  87 . This aperture is generally rectangular, and the end thereof closest double-sided latch portion  65  is a generally flat end  120  configured to receive locking end portion  118  there against. In this position, inward pressure, or forcing, exerted on double-sided latch member  65  (shown generally at arrow  122 ) will push end  120  against locking end portion  118 . However, as double-sided latch member  65  of plate  72  is free to move relative to plate  74  within the length of the lost motion slots  80 ,  82  and gap  73 . The inward pressure at arrow  122  will not cause movement of plate member  74 , and therefore bar  112  will lock in place with locking end portion  118  engaged against end  120 , thereby preventing force at arrow  122  from causing latch bolt member  56  to retract inward door  14 . 
     To retract latch bolt member  56 , handle  63  is turned, causing rotary drive member  66  to actuate the pinch pulls  68  to engage over extending portion  102 , which thereby actuates both plates  72 ,  74  to pull latch bolt  56  inward door  14 . As plate  74  is actuated inward door, the edge  109  of lockout bar control slot  108  on plate  74  engages extending portion  116  of bar  112 , causing it to arcuately actuate about pivot  110 . Such movement moves locking end portion  118  out of engagement with end  120  of intermediate locking portion  87  of plate  72 , thereby permitting inward movement of both plates  72 ,  74  and thus of latch bolt member  56 . 
     To interconnect door  12  and door  14  within frame  16 , door  12  includes a strike plate  130  mounted on lock stile  30 . Strike plate  130  includes a bolt aperture  132  therethrough into which double-sided latch member  65  from door  14  is received (best shown in FIG.  6 ). 
     Referring now to FIGS. 2,  3 ,  6 , and  7 , the receipt of double-sided latch member  65  into bolt aperture  132  will not secure a pair of doors  12 ,  14  against movement in frame  16 . Therefore, each of doors  12 ,  14  further include upper and lower flush bolt drive mechanisms  60 ,  61  to actuate flush bolts  158  to lock doors securely within upper header  38  and floor  40 . The actuation of each of flush bolts drive mechanisms  60 ,  61 , within each of doors  12 ,  14  is substantially identical, and therefore the operation of one of said drive mechanisms  60 ,  61  in one of said doors  12 ,  14  will be described, it being understood that each of the other three in doors  12 ,  14  operate in substantially the same way. 
     Referring to FIGS. 2 and 6, upper and lower flush bolt drive mechanisms  60 ,  61  are secured within a hollow cutout portion  140  in door  12  which extends the length of door  12  and terminates adjacent upper portion  26  and lower rail portion  28 . Hollow cutout portion  140  receives both upper and lower flush bolt drive mechanisms  60 ,  61  and case  51  in which a lock actuating portion  142  is disposed and which actuates flush bolt drive mechanisms  60 ,  61  as hereinafter described. Case  51  is received in a portion of hollow cutout portion  140 , and also includes the latch bolt  56  in the “male” side of the pair of doors  12 ,  14 . 
     Referring again to FIG. 2, lock actuating portion  142  is comprised of plate  144 , having a guide slot  146  therein, gear racks  148  disposed on either side thereof, and a lock attachment portion  150  forming one end thereof. Lock attachment portion  150  of plate  144  extends outward case  51  and is received within rotary drive member  66  of lock  52  on door  12 . Lock attachment portion  150  includes outward projecting ears  145  which are received within pinch pulls  68  located within a housing of lock  52 . When lock  52  is actuated to lock or unlock door  12 , pinch pulls  68  engage ears  145  to horizontally actuate plate  144  within case  51 . To maintain plate  144  in alignment within case  51 , a raised guide ledge  151  is provided in case  51 , and projects from the side wall  153  thereof. The length of slot  146 , less the length of guide ledge  151 , is preferably slightly greater than one half inch, to allow horizontal actuation of plate  144  of approximately one-half inch. As door  12 , in which the structure of flush bolt  60  is described, does not include latch bolt  56 , plate  144  is used in the “female” lock of the pair and is substantially identical to plate  74 , except guide slot  146  therein replaces intermediate locking portion  87 . Thus, the gear racks  148  on plate  144  are intended to be identical to the gear teeth  106  on plate  74 , and plate  144 , and the combination of plates  72 ,  74 , may be interchanged such that latch bolt member  56  extends from door  12  into door  14 , and door  14  includes only flush bolts  158 , if desired. 
     Referring now to FIGS. 2,  3 , and  6 , flush bolt drive mechanism  60  includes lock driven member  154  in which transfer rod  156  is received, flush bolt  158  received on the end of rod  156  adjacent upper rail portion  26 , lockout mechanism  160  and translation member  162 . Flush bolt  158  is configured to be received within upper rail portion  26 , and actuate therefrom into frame upper rail  38 . Likewise, flush bolt  158  on flush bolt drive mechanism  61  actuates from lower rail portion  28  into floor  40  (or sill  42 ). Lockout mechanism  160  is configured to retain flush bolt  158  in door  12  when door  12  is in an open position relative to frame  16 , and to release flush bolt  158  when door  12  is closed into frame  16  with door  14 . 
     Translation member  162  includes translation arm  170  rotatably retained on case  51  side  153 , and lost motion mortise guide  172 . Translation arm  170  is preferably a thin metal stamping, casting or the like, having a first semi-arcuate portion  174  and a second, extending finger portion  176  extending from the semi-arcuate portion  174  and terminating within mortise guide  172 . Semi-arcuate portion  174  and finger portion  176  have a common base  178 , and semi-arcuate portion  174  is formed of a semi-circular extension  180  on one end of translation arm  170 . The outer periphery of extension  180  includes a series of teeth  182  thereon, such that extension  180  forms a geared semi-pinion which is received on the gear rack  148  on plate  144 . (Where plate  144  is replaced with latch bolt  56 , teeth  182  on extension  180  are received on gear teeth  106 ). Semi-arcuate portion  174  further includes guide hole  183  therethrough, at the center of the radial arc defining the semi-circular extension  180  on which the gear teeth  182  are provided. A guide pin  184  projects from case side  153 , and is received within hole  183  to maintain translation arm  170  in position within case  51 , but allow rotational motion with respect thereto. Gear rack  148 , teeth  182 , semi-circular extension  180 , and hole  183  and pin  184  are sized to permit relatively free, non-binding movement of translation member  170  about pin  184  in response to lateral motion of plate  144  within case  51 . 
     Extending finger portion  176 , which extends from semi-circular extension  180 , includes lock end  186  received within mortise guide  172 . Mortise guide  172  includes guide slot  188  therein to receive end  186  therein. When flush bolt  158  is in the retracted position shown in FIG. 2, finger portion  176  extends through guide slot  188  and lock end  186  thus extends outward therefrom. When flush bolt  158  is extended into the locked position as shown in FIG. 3, lock end  186  of finger portion  176  terminates within slot  188 . 
     To retract flush bolt  158  from the position shown in door  14  in FIG. 3 to that shown in FIG. 2 in door  12 , and thus out of frame  16 , rotary drive member  66  is turned, causing pinch pulls  68  to engage ears  145  on lock attachment portion  150  of plate  144 , which pulls plate  144  inward door  12 . In door  14 , first engagement portion  102  is engaged by pinch pulls  68  to actuate bolt  56  inward door  14 . As plate  144  moves inward, gear rack  148  engages gear teeth  182  on semi-circular extending portion  180 , thereby causing translation arm  170  to rotate about pin  184 . Rotation of translation arm  170  causes translational motion of finger portion  176 . This translational motion of finer portion  176  causes mortise guide  172  to move vertically as arm  170  moves against the boundary of the slot  188 , pulling mortise guide from the extended position until lock end  186  is extended through and within mortise guide  172 . Translation arm  170  is sized such that the total vertical movement of mortise guide  172 , as a result of arm  170  movement, is at least one and one-half times the length of movement of plate  144 . 
     Referring still to FIGS. 2,  3 , and  6 , the movement of mortise guide  172  causes equal motion of lockout mechanism  160 , which in turn causes equal movement of rod  156  and flush bolt  158  attached thereto. Each of flush bolt  158 , rod  156 , lockout member  160  and mortise guide  172  are rigidly interconnected, so that motion or force imparted vertically on any member is transferred to each other member. Rod  156  has threaded end portions  190  which are received in threaded holes (not shown) in flush bolt  158  and/or lockout member  160 . By turning rod  156 , fire adjustment of flush bolt  158 , relative to the header  38 , may be made. 
     Lower and upper flush bolt drive mechanisms  60 ,  61  are spring biased to the thrown, or flush bolt  158  extended, position. To create this bias, mortise guide  172  includes a spring retainer aperture  192 , into which one end  193  of a tension spring  194  is hooked, or otherwise retained. The opposite end  199  of spring  194  is affixed to case  51  through a post  196  extending from case side  153 . Spring  194 , and the distance from post  196  to the fully extended and retracted positions of mortise guide  172 , are sized so that spring  194  is in slight tension when flush bolt  158  is fully extended, and in full tension when flush bolt  158  is fully retracted. Spring  194  must thus be sized so that in its fully expanded position, the elastic limit of the spring  194  is not reached. As spring  194  is always in tension, it will maintain a force on flush bolt drive mechanisms  60 ,  61  tending to actuate flush bolt  158  to its extended position. 
     To prevent flush bolt  158  from actuating outward when doors  12 ,  14  are in an open position, lockout member  160  includes an arcuate bumper recess  200  therein, into which retract lockout member  198  is selectively received. Retract lockout member includes a spring-loaded finger having a stationary post  202  affixed to the case  51 , over which an annular spring-loaded drive member, or cup,  204  is disposed. Drive member  204  is in the form of an inverted cup, the hollow of which receives post  202 . A compression spring  208  is disposed over post, and one end thereof bears on the side of case  51  and the other end thereof bears on the annular lip portion  206  of cup  204  surrounding post. In this manner, cup  204  is biased outward from the rear or side of case  51 . 
     To engage and selectively retain lock member  160 , cup  204  includes a bumper arm  212  which extends from an edge of cup, encompassing lockout member  90 , and terminates outward lock stile  30  of door  12 . A circular bumper  210 , configured to be received within recess  200 , is rotatably secured at its center  214  to arm  212 . 
     Referring now to FIGS. 2,  3 ,  5  and  7 , the portion of bumper arm  212 , which extends outward door  12  is triangularly configured, and includes opposed canted sides  216  meeting at peak  218 . As door  12  is closed against either of sides  216 , further movement of doors  12 ,  14  into alignment causes the edge of door  14  to push arm  212  inward door  12 , thus releasing bumper  210  from recess  200 . As flush bolt drive mechanisms  60 ,  61  are spring-biased, movement of bumper  210  out of recess  200  allows lockout member  160  and flush bolt  158  attached thereto to actuate outward to lock door  12  in jamb  16 . When rotary drive member  66  is actuated to retract flush bolt  158 , bumper  210  is actuated back into recess  200  by spring  208 . Likewise, movement of doors  12 ,  14  into a closed position actuate arms  212  on door  14 , thus extending flush bolts  158 . 
     Referring to FIG. 3, motion of flush bolts  158  in response to inward movement of arm  212  will cause translation member  162  to rotate about pin  184 , thru engaging teeth  182  on gear teeth  106  on plate  74 , actuating latch bolt  56  into the extended position. Thus both the flush bolts  158  and latch bolt  56  may be actuated into the extended position by closing doors  12 ,  14  to actuate bumper arm  212 . When bolts  56 ,  158  are in the retracted position, handles  63  will freely turn without corresponding motion of pinch pulls  68 . Thus, bolts  56 ,  158  may only be actuated by depressing bumper arm  212 . 
     Referring now to FIG. 3, with flush bolts  158  in the extended position, inward force or movement on either flush bolt  158  will push the edge of guide slot  188  in the corresponding mortise guide  172  into engagement against lock end  186  of extending finger portion  176 , thus preventing further inward movement of flush bolt  158  by outer force. Mortise guide  172 , arm  170 , rod  156 , flush bolt  158 , and lockout member  160  are sized such that lock end  186  will engage the end of guide slot  188 , as flush bolt  158  is being pushed inward, while a substantial length of flush bolt  158  extends outward door  12 ,  14 . Thus, the interaction of extending finger portion  176  and mortise guide  172  will help prevent forcing of the door by jimmying of flush bolts  158  inward door. 
     Referring now to FIG. 8, an alternative embodiment of the invention is shown, wherein the rotary lock is replaced with a standard deadbolt lock mechanism  300 , modified to actuate flush bolts  158 . Deadbolt lock mechanism  300  includes case  302  having lock retainer portion for receiving a deadbolt  304 , and an actuating portion  306 . Actuating portion includes a lever  308 , pivotable about lock tab lead  310 , having a first driven portion  312  rotatably received within lock tab lead  310 , and a second actuating and locking portion  314  extending therefrom and terminating in a generally flat face  317 . Lever  308  may be actuated between a first, engaged position and a second retracted position, by arcuate movement with respect to lock tab lead  310 . 
     Deadbolt  304  includes a rearward projecting slide bar  316 , including a slot  318  therethrough into which locking portion  314  of lever  308  extends. A rack member  320  is interconnected to slide bar  316 , and includes lower and upper gear racks  322  rigidly interconnected to slide bar  316  to move laterally in conjunction therewith. 
     First driven portion  312  includes a pair of opposed slots  324  therein, which receive the drive tab  326  of a standard lock cylinder. The lock cylinder may be part of a double cylinder lock, i.e. where a keyed cylinder is disposed on either side of the door, or a single cylinder lock, where a keyed cylinder is disposed on the outer side of the door and a thumb turn is disposed on the interior of the door. Likewise, in certain situations, the lock may not employ keyed cylinders, and other drive systems, including ones having a latch bolt driver on one side of the door only, may be used. 
     To actuate deadbolt  304 , the lock cylinder is turned causing rotation of drive tab  326 , thereby actuating locking portion  314  of lever  308  in slot  318 . Lever  308  engages the end of slot  318 , causing slide bar  316  and bolt  304  to move laterally. Lever  308  is spring loaded, or biased, to drive it from a center or straight up position to either side. Motion of slide bar  316  causes equal motion of gear racks  322 , which in turn actuate flush bolts  158  as herein before described. 
     When deadbolt  304  is fully extended, face  317  of locking portion  314  engages the end of slot  318 , preventing retraction thereof unless lever  308  is actuated, thereby limiting the ability to force the deadbolt  304  inward the door  12 . 
     Standard deadbolt mechanism  300  is an off the shelf item, and the only modification thereto is the addition of the rack member  320  with gear racks  322 . When this mechanism is employed, the fingers  212  associated with the flush bolts  158  should not be used, as lever  308  would prevent movement of deadbolt  304  and slide bar  316  unless lever  308  is moved from its locked position. 
     Referring now to FIG. 9, a guide channel  400 , having the flush bolts  158  movably housed therein, is recessed into a rabbet  402  formed inward the outer edge of the doors  12 ,  14 . The flush bolts  158  are inserted through the guide channels  400 . Preferably, the guide channels  400  are of sufficient length to abut/engage the lock mechanism and extend above and below therefrom (to the) ends of the doors  12 ,  14 . The guide channels  400  serve as tracks to direct the flush bolts  158  through movement between extended and retracted positions. The guide channels  400  can be used with doors  12 ,  14  made of various materials including but not limited to wood and metal. The guide channels  400  are preferably made of a decorative material such as brass or copper. However, the guide channels  400  may be made of plastic materials or wood may also be used. 
     To assemble the guide channels into the doors, a groove, such as a rabbet  402  is formed inward of the outer edge of the doors  12 ,  14 . The guide channels  400  are installed in rabbet  402  with outer edge  404  flush with outer edge of doors  12 , 14 . The flush bolts  158  are inserted through the guide channels  400  and connected to locks  52 ,  54  previously assembled in doors  12 ,  14 . The employment of the guide channels  400  insures smooth running of the hardware within the doors and eliminates the need for a top plate or bottom plate to align the bolt at the top or bottom end of the door. The outer edges  404  of guide channels  400  form a decorative edge to hide the flush bolts  158  from normal view. 
     In cross section, the guide channels  400  may be rectangular, square, round, or triangular. Preferably, the interior configuration of the guide channels must be substantially similar to the outer profile of the flush bolts  158  so that the flush bolts  158  are able to accomplish slidable movement therein. 
     Referring now to FIGS. 10 and 11, there is shown a further alternative embodiment of the invention. In this embodiment of the invention, the lock case of the embodiments of the invention shown in FIGS. 1 through 9 is modified, to provide an elongated case  500 . This elongated case  500  includes the internal mechanisms previously described as received within the case, but is further extended rearwardly to circumscribe a bore  502  extendible therethrough. In contrast to the embodiments of FIGS. 1 to  9 , the first engagement portion  102  of the second plate  74  terminates within the case, specifically within the bore  502 . 
     Although the case  500  is useful with any type of door knob or handle, it is particularly useful for use with handle sets, such as those of the type shown in FIG. 1 hereof, wherein, as shown in FIG. 11, the handles  508 ,  508 ′ each include a central spindle portion  510  which extends outwardly from the door  10  (shown in phantom in FIG. 11) and substantially perpendicular to the outer planar face thereof, and a lever portion  512  extending from the spindle portion  510  and substantially perpendicular thereto. This handle  508  is rotatably received over an outer flange  514 , which covers the opening  509  (shown in phantom in FIG. 11) of the handle bore through the door  10  when the handle  508  is installed on the door, and a cylindrical housing  516  extends therefrom in which the retractable, non-locking jaws, are located. The housing  516  includes a slot  520  therein, from which the retractable, non-locking jaws may engage the engagement portion  102 . A pair of mounting posts  522 ,  522 ′ also extend from the flange  514 , and these posts  522 ,  522 ′ are internally threaded. The engagement portion  102  may be the rear end of the bolt, the dual element slide, a drive member to provide motion to a latch bolt translation member, or of another device. 
     When the handle  508  is at rest, the jaws are positioned at the entry of the slot  520 . As the handle  508  is rotated, the cylindrical housing  516  must remain stationary, and therefore the retractable, non-locking jaws will be moved inwardly of the slot  520  to move the second plate  74  for retracting the latch bolt. The handle  508  is biased to the rest position, wherein the jaws are extended to the entry of the slot  520 . When the handle  508  is returned to the rest position, or is freed from the operators hand and returns to the rest position, the jaws return to the extended position with respect to the slot. 
     The handle  508 , and the operation of the handle  508  to move the retractable, non-locking jaws, are old. However, the placement of the handle mechanism, including the cylindrical housing  516  to align the jaws with the engagement portion  102 , is new. In particular, the placement of the cylindrical housing  516  through the bore  502 , and the termination of the engagement portion  102  within the bore, enable the non-locking retractable jaws to be properly aligned with the engagement portion  102 , because the bore  502  provides a pilot to ensure the alignment. Thus, the binding and related problems in the prior art, caused by the non-alignment of the jaws with the latch bolt, is eliminated by the present invention. 
     To mount the handle  508  to a door, a slot is mortised into the lock stile of the door.  10 , and a cross-bore is drilled through the face of the door  10  or  12 . The case  500  is inserted into the slot, such that the bore  502  therein aligns with the opening  509  of the cross-bore in the door  10 . A first handle  508  is placed over the opening of the cross bore or through one face of the door, such that the cylindrical housing  516  passes through the bore  502  and the retractable jaws are engaged with the engagement portion  102  within the bore  502 . A cover plate  540  is located over the portion of the housing  516  which extends through the door  10  adjacent to the handle  508 ′, and a nut  542  is threaded over the extending portion of the housing  516  to secure the plate  540  against the door  10  and secure the housing  516  in position within the door  10 . The handle  508 ′, and the cover  514 , are then piloted over the extending portion of the housing  516  to complete the assembly. 
     To provide the positioning of the cylindrical housing  516  to enable alignment of the jaws and the engagement portion  102 , the case further includes a plurality of holes  560  a-d, through two of which extend the posts  522 . The posts  522  thereby provide the alignment of the handles  508 ,  508 ′, and the retractable non-locking jaws, with the engagement portion  102 . Although only two posts are provided, additional holes  560  for receiving the posts  522  are provided, to allow the case  500  to be used in conjunction with the handle sets of multiple handle vendors. 
     From the foregoing description, it should be appreciated that the lock system  10  of the present invention provides anti-jimmying features in a three-way single door lock. Although a preferred embodiment of the invention for use in a pair of french doors has been shown and described, it will be appreciated that the components may be used singly, or together, in single or other multiple door arrangements to provide positive locking features. The lock may be used with sliding doors to lock upper and lower flush bolts into the frame to prevent sliding. As the door approaches closure, the bumper arms  212  will actuate inward to release the bolts. Additionally, other lock or handle configurations may be used in conjunction with the lock elements to practice the invention, and the deadbolt and flush bolt features of the invention used separately or in any combination thereof.