Abstract: An adjustable lock has an adjustment slide arranged in the bottom of a key housing, the slide is situated underneath the bolt element and a number of tumbler devices with teeth engage a blade carried by that slide, the improvement of that lock includes a recess and an oblong slot in the bolt element, a first stationay pin mounted to the housing and traversing the oblong slot; a bolt drive lever has its lower end mounted on the pin and is otherwise situated in the recess for translating key motion into a larger latch motion for the bolt, the bolt drive lever having a projection; in addition to a bearing bore, a central part of the bolt driver lever is provided with a key control curve, and the projection on the drive lever engages a U-shaped indent of the bolt, so that the bolt is moved on turning of the drive lever; hence the tumblers are encoded when a key is inserted and turned oppositely following the taking out of the tumblers of said blade, and the key, possibly a new and different key, then re-encodes t

Abstract: A key for use with a lock having internally lugged tumblers comprises an elongate cylindrical member with a longitudinal keyway to receive the lugs. From the longitudinal keyway extend a plurality of circumferential grooves of coded lengths. From the ends of certain of these circumferential grooves extend second, axial grooves which extend back toward the handle of the key. These axial grooves permit the key to be pushed inwardly into the lock after the key has been fully turned. One of the circumferential grooves does not include an axial segment extending from the end thereof. This groove engages a member in the lock which is caused to move when the key is pushed inwardly after rotation. The movement of this lock member activates a printing mechanism inside the lock.

Abstract: An axial tumbler pin lock that includes an inner cylindrical body and a pair of abutting, coaxially positioned first and second inner sleeves that are rotatably carried on the cylindrical body and are capable of relative rotation with respect to each other and with respect to the cylindrical inner body. The cylindrical inner body includes a stepped portion that abuts an inner sleeve to define a transversely extending locking plane. The respective abutting faces of the second inner sleeve and the inner cylindrical body define a transversely extending first reset plane, and the abutting faces of the first rotatable sleeve and the second rotatable sleeve define a transversely extending second reset plane.

Abstract: A lock which is rekeyable or programmable to operate with a different key from the exterior thereof without disassembling it or removing it from a lock assembly in which it is assembled is disclosed. The lock is rekeyed by a change key through the keyway so that the lock appears from the exterior thereof to be a conventional lock. The change key which can not operate the lock adjusts a movable shear line formed by what is in effect an externally adjustable tumbler. The lock includes a plurality of pin tumbler sets and a plurality of cylinders disposed one in the other in the lock casing. The pin tumbler sets and the cylinders cooperate to from a plurality of common pin tumbler shear lines, i.e., shear lines formed by a number of individual shear lines of individual pin tumbler sets. In a given position of the adjustable shear line, only one of the keys will position the pin tumblers to form the proper common pin tumbler shear which is aligned with the adjustable shear line to operate the lock.

Abstract: A lock apparatus includes a key-in-knob lock, padlock or other type of 90.degree. lock provided with a cylindrical plug having a keyway for receiving a master key that has bittings for positioning a master pin in the top portion of a first pinway with the bottom of the master pin aligned with the shear interface to unlock the lock. The plug has a guideway at the surface thereof and angularly displaced from the keyway less than 180.degree. for receiving the master pin during re-keying. A blocking rod is received in the guideway for normal, non-re-keying use of the lock. After removal of the rod from the guideway, a transfer tool is slidable into the guideway. The tool has a cut for receiving the master pin from the first pinway. The tool slides relative to the guideway and moves the master pin in the guideway to directly reposition the master pin adjacent a randomly selected second pinway.

Abstract: Methods and apparatus are disclosed for multiple level user and master key lock rekeying changes externally by the use of appropriately bidded level change keys. Several variations of methods and apparatus for removing user level change wafers to rekey user levels independent of master levels and to rekey master levels independent of user levels are disclosed. Some of the apparatus are suitable for locks wherein the cylinder is rotatable at 180.degree., and other embodiments are disclosed for locks wherein cylinder rotation is limited to less than 180.degree.. Further, apparatus for enhancing the security of such rekeyable locks are disclosed.

Abstract: A modifiable cylinder which comprises a plug and a cylinder body. The plug fits into the cylinder body and has a keyway and a plurality of bottom pin holes which are disposed above and perpendicular to the keyway. Each of the bottom pin holes has a bottom pin. The cylinder body comprises a main chamber housing and a subchamber housing. The main chamber housing has a plurality of top pin holes, each of which has a spring and a top pin. In open position, the top pin holes are aligned with the bottom pin holes. The subchamber housing has a plurality of top pin holes, each of which has a spring, a top pin and several discs. When the plug is turned to the modifying position, the top pin holes are aligned with the bottom pin holes so that the discs can be moved into the bottom pin holes so as to modify the inner combination of the cylinder.

Abstract: The present invention provides a lock barrel, particularly a changeable key type barrel which is characterized by using of a profile changing key to reset locking keys in the barrel by turning the barrel for 180 degrees and another profile changing key to restore the barrel to the original position by turning the barrel for 180 degrees but simultaneously the locking keys are pushed to different heights by means of some side plates to complete profile changing.

Abstract: A cylinder lock whose stator is a longitudinal groove and whose rotary cylinder has a key receiving slit, two series of seatings and two orthogonal slits; a series of sliders pushed by springs is inserted, with mobility in two directions, into the first series of seatings of the cylinder and cooperates with a key, and each slider is provided with projections and with a member for sliding engagement; a series of tumblers is slidingly inserted into the second series of seatings of the cylinder, and each tumbler is provided with recesses turned towards the sliders and with at least one recess at the opposite side; a stop bar pushed by springs is inserted into an orthogonal slit and is provided with projections turned towards the tumblers and with a continuous projection suitable for being inserted into the groove of the stator; and a translation bar pushed by springs is inserted into the other orthogonal slit of the cylinder, engages the members for sliding engagement of the sliders and is provided with a contin

Abstract: A lock is re-keyable for sequential use with different ones of a set of change keys, without disassembling the lock or removing or replacing any parts therefrom or therein. A housing of the lock has a bore extending axially therethrough to define a shear interface and receive a plug for rotational and axial movement, with one rearward axial position for operation of the lock and another forward axial position for re-keying. The plug is held fixed rearwardly by a retainer to form pinways. According to which change key currently operates the lock, a particular reset key selectively positions at least one master pin in either the plug portion or the housing portion of the second pinway. The reset key releases the retainer and the plug is moved forward axially to align a third pinway with the master pin in the housing portion or a first pinway with the master pin in the plug portion. The reset key is removed and a corresponding set key is inserted into the lock.

Abstract: An electronic locking system including a lock cylinder having an electronically actuable release assembly which is selectively enabled to disengage a pin from a cylinder plug, to permit the rotation of the plug by an inserted key. The lock cylinder and key each contain non-volatile, electronically alterable memory devices, such as EEPROM integrated circuits, which house keying system codes. The key EEPROM is preferably housed within the key blade, in a key design which closely resembles a traditional mechanical key without the usual bitting. The release mechanism incorporates a locking pin which is moveable between plug-engaging and non-engaging positions, along a radius of the lock cylinder. The release mechanism may include a primary actuator which directly moves the locking pin, or may act indirectly upon the locking pin via a latching member.

Abstract: A first set of pivoted latching fingers having hook ends facing in a first direction are provided, together with a second set of pivoted latching fingers interlaced with the first set in accordance with a particular combination which unlocks the device. The fingers of the second set of latching fingers have hook ends facing in a direction opposite to the direction of orientation of the hook ends of the first set and actuation of only the proper combination of fingers causes the hooks of all fingers to be displaced away from a pair of facing lock anchor members to unlock the lock. All of the fingers are pivoted so that slight amounts of magnetically permeable material in the card key are sufficient to move the hooks of the pivoted latching fingers bearing permanent magnets, through a substantial distance, to enable the use of a thin, flexible card key for positive lock actuation.

Abstract: A cycle lock having at least one plurality of disc-like tumblers loosely mounted on a shaft parallel with the axis of rotation of the key rotated lock cylinder. Each tumbler has a two spaced lobes which, in the neutral state of the tumbler, contact the arcuate surface of the cylinder but one of the lobes may drop into the key slot in the cylinder if not occupied by a high segment on the key. A key is initially inserted into the lock at a special location at which all tumblers are in their neutral state, and the rotation of the key to its normal position of insertion and removal will set the lock tumblers according to the key coding. In one embodiment particularly useful for hotels, etc., two sets of tumblers are employed: one set for transient or guest keys, a second set for service personnel keys, and a third key, a grand master key, operates the second tumbler set and can reset both sets of tumblers for accepting new keys with different codings thereon.

Abstract: The combination lock is one wherein movable members of the combination mechanism are set in decoding position by a key in the form of a rotatable shaft with a head at one end serving as a handle. Rotation of the key to proper decoding position is determined by shifting an index mark on the key relative to selected units of a set of letters or numerals on the lock housing. The combination mechanism makes use of a multiple number of pairs of discs concealed in the housing which must be successively set in proper decoding position, one disc relative to the other, to release a lock operating plug. In proper decoding position a slide bar, which normally blocks rotation of the lock operating plug, is shifted by key action into openings provided in the discs and out of blocking engagement with the plug, in which position the plug is free for rotation by the key.

Abstract: A double changeable tumbler lever type key lock for safe deposit boxes and the like having a slidable bolt plate carrying a stack of fence members, and a stack of tumbler levers occupying positions in the locked condition to bar retraction of the fence members and bolt plate from locking position. The tumbler levers each have first and second lift edge portions and are movable responsive to a guard key and a renter's key engageable with the pair of lift edge portions of each tumbler lever to position the levers to permit retraction of the bolt to unlocking position. Mounting structure on the bolt plate supports the fence members of the stack for guided adjustment to positions corresponding to a predetermined range of key shapes and for selectively clamping the fence members in their adjusted position.

Abstract: A lock includes a running plate formed integrally with a locking bar and provided with a fence adapted to cooperate with a plurality of tumblers so as to alternatively block and allow retraction of the locking bar, and this mechanism is mounted together with the cooperating components within a lock housing. The tumblers allow retraction of the locking bar when moved by a prescribed key to a unlocking position and this prescribed key, which can move the tumblers to the unlocking position, can be exchanged with another prescribed key by displacing the rotational axes of the tumblers. The rotational axes of the tumblers are rotatably released or fixed by a conversion shaft extending through an opening formed in the tumblers and rotatably supported in the lock housing. The conversion shaft is provided with a stop piece and a locking piece.

Abstract: A changeable safe deposit lock, usable in a single key or a double key configuration, having one or a pair of stacks of vertically slidable adjustable fences carried on a bolt plate and held in adjusted positions by a clamping assembly having a changing screw which is accessible at the back of the lock when the bolt plate is in unlocked position. After insertion of a key for which the lock is presently conditioned and rotation of the key to the unlocked condition, the screw may be loosened and the key rotated an additional distance whereby the initial key can be removed from the lock and a second key may be placed in the lock and rotated to return the bolt plate to the locked position and the changing screw tightened down to lock the fences in the new position adapted to the new key.

Abstract: A rekeyable cylinder lock includes removeable spacers between top and bottom tumbler pins, and a key bit device for removing a spacer from the pin chamber through the key way. The key bit device includes bitting thereon to position the spacer in the top pin chamber and a cut in the opposite side thereof adapted to capture the spacer from the top pin chamber and remove it from the lock. In another embodiment of the invention, a key bit device is provided for placing a spacer into a pin chamber of the lock to rekey the lock. It includes a mechanism, such as a spring, in a cut on the back side of the key bit that is adapted to force a spacer out of the cut and into the pin chamber in the lock.

Abstract: A rekeyable cylinder lock includes removeable spacers between top and bottom tumbler pins, and a key bit device for removing a spacer from the pin chamber through the key way. The key bit device includes bitting thereon to position the spacer in the top pin chamber and a cut in the opposite side thereof adapted to capture the spacer from the top pin chamber and remove it from the lock. The spacer is preferably smaller in diameter than the tumbler pins, and the cut is large enough to receive the spacer but too small to receive the tumbler pin. In another embodiment of the invention, a key bit device is provided for placing a spacer into a pin chamber of the lock to rekey the lock. It includes a mechanism, such as a spring, in a cut on the back side of the key bit that is adapted to force a spacer out of the cut and into the pin chamber in the lock.

Abstract: A tumbler lock comprising housing pockets in an outer housing and plug pockets in a cylindrical plug rotatably mounted in the housing holding slidably outer and inner pins respectively, auxiliary pockets in the housing corresponding to the plug pockets at a certain rotated position circumferentially spaced from the housing pockets holding therein auxiliary pins, and change pins which may be interpositioned between the inner, outer and auxiliary pins and interchanged between the respective pockets so that the change pins may be freely shifted to reset the back to be operated by different keys.

Abstract: A resettable single-barrel single-plug cylindrical two section lock assembly is provided wherever master keying is required. The lock of the invention is intended to be operated and reset by three different keys. One key (#1 key) is used to turn the lock to a position in which it may be reset by either of the other two keys. One of the other two keys (#2 key) operates a first section of the dual lock; and the other of the other of the two keys (#3 key) operates a second section of the lock which is independent of the first section. Either section may be reset by inserting the existing #2 or #3 key into the lock once the lock has been turned by the (#1) key to a predetermined position, and then turning the lock to the reset position, and after the existing key has been withdrawn, turning the lock back to its normal operating position by the new key, either the #2 or #3 keys, depending upon which section of the lock is being re-keyed.

Abstract: A lock in which a replaceable control shaft adjusts a moveable shaft in the main cylinder to different predetermined levels. By adjusting the moveable shaft a new shear line is created between the key pin housed in the shaft and the spring loaded pin tumbler housed in a separate moveable shaft embodied in the lock housing. When a new shear line has been created a new predetermined key will become operable while the prior key, unless it is a master key, becomes inoperable.A special key when rotated causes a cylinder to rotate creating a cavity in the lock allowing access to the control shaft through the facing of the lock. The control shaft has a spring that compresses upon adjustment securing a nodule on the control shaft into one of several cavity slots. The control shaft has teeth that mesh into the adjustable moveable shaft. The teeth may or may not cause the moveable shaft to change position upon the rotation of the control shaft.

Abstract: A changeable multiple key lock for safe deposit boxes and the like, including a locking bolt slidably movable in a lock case and having a pair of longitudinally spaced fence members, two stacks of peripherally gated tumbler wheels rotatably supported in the path of unlocking movement of the fence members having gating recesses to receive the fence members to permit bolt retraction to unlocking position, and two sets of key operable pivoted sector levers having gear teeth couplings with the two stacks of tumbler wheels to be operated by a guard key and a renter key. The two sets of sector levers are pivotally mounted eccentrically on posts which are rotatable to positions decoupling the levers from their associated tumbler wheels by a change key to free the sector levers to assume new positions for a new renter's key or a new guard key.

Abstract: A changeable combination, axial pin tumbler lock is operable by means of a cylindrical service key. Set keys are used to change the tumbler combination and thereby provide for operation of the lock by a different service key. The lock includes a fixed cylindrical barrel with twelve tumbler passages in opposed relation with a rotatable plug and barrel having seven tumbler passages. One half of the passages of the fixed barrel store reserve tumblers. A single shear interface is defined by the plug barrel and fixed barrel. Transfer of reserve tumblers from the fixed barrel passages to the plug barrel passages by means of set keys effects a combination change.

Abstract: Extending between the plug and the housing of a pin tumbler lock are two diagonally opposed rows of columnated locking tumbler pins with or without master pins which establish two individual shear lines between the housing and the plug. An operating key, which is insertable centrally within the plug in a single orientation therewith, is provided with a pair of bitted surfaces which respectively contact the columnated pins in the respective rows. The columns of the master pins and locking tumbler pins in a first of the rows have thicknesses and numbers which may be collectively different from those of the columns of the wafers and locking tumbler pins in a second of the rows to form a unique coupling arrangement along each of the shear lines between the plug and the housing. The above structure including the two rows is combined with the invention described in co-pending patent application, Ser. No. 752,084, filed Dec. 20, 1976, now U.S. Pat. No. 4,094,175, patented Jun.

Abstract: A lock comprises separate key plug, lock plug and memory storage of a key image inserted in the key plug and transfer of the stored image to the lock plug for testing of the image at a site removed from the key plug. The key image memory and transfer mechanism comprises multiple chips offering a flexibility for key changes by any inserted key when the key plug and lock plug are in "unlocked" position. The memory is changed to the new key image. Testing is accomplished after lost motion rotation of the key plug to preclude manipulation of lock pins in the lock plug during testing of the key image (i.e., torquing of the lock plug).

Abstract: The invention relates to an improved device for opening a lock and a means for actuating the device. The device is characterized by a moving plunger or rotating wheel which is provided with slots which mesh with at least two rocking tumblers which engage the slots when they are biased by a reference card and thus prevent movement of the plunger or wheel. The rocking components can be disengaged from the slots when they in turn are biased by the proper keycard, thereby freeing the plunger or wheel and allowing operation of the mechanism of the lock.

Abstract: A pin tumbler cylinder lock having a plug rotatable within an external housing, the housing and plug having a row of axially aligned locking bores, a key slot in said plug in alignment with the bores, the lock bores having space for springs, wafers and locking tumbler pins positioned and sized to permit the plug to be operated with a predetermined operating key to lock and unlock the lock when the operating key is inserted into the slot; the housing having a row of auxiliary aligned bores angularly offset from the locking bores, the auxiliary bores having springs and master wafers, the springs biasing the master wafers inwardly toward the plug; and the improvement comprising a relatively thin-walled shutter sleeve fitted for rotation around the plug, the plug being adapted to rotate within the shutter and/or therewith, a row of axially aligned locking bores in said shutter in respective radial and axial alignment with the locking bores in the housing and the plug; first means within the housing and the shutte

Abstract: A double key changeable safety deposit lock includes a movable bolt and associated bolt plate including cam surfaces to be engaged and moved between open and closed positions by turning renter and guard keys in the lock, a plurality of gated tumbler renter key levers to be engaged by the renter key, a plurality of gated tumbler guard key levers to be engaged by the guard key, each of the levers being moved to align their respective gates to receive latch members on the bolt plate upon manipulation of the two keys to allow opening of the lock and wherein pivot means are provided for each lever including a plurality of individually selectable pivots such that the pivotal axis of each lever may be selectively varied to provide for different combinations of lever movement required by an associated key to align the associated gates.

Abstract: A double-barrel double-plug cylindrical lock is provided for hotels, and the like, where changes of occupancy frequently occurs. The lock cylinder is constructed to be of approximately the same size and shape as the prior art lock cylinders, so that the lock of the invention may readily be mounted into existing mortise door hardware to replace existing cylindrical locks. One plug of the lock is intended to be operated by the guests' key; and the other plug is intended to be operated by the maid's key, by an emergency key and by a program key. The guest key may be used to turn the guest plug to a resettable position in which a new guest key may be inserted which sets the guest plug to accept the new key. However, the lock is constructed so that the guest plug cannot be turned to its resettable position unless the emergency key or program key is first inserted in the other plug to turn the other plug to a particular angular position in which the guest plug is able to be turned to its resettable position.

Abstract: A mechanical lock comprises a cylindrical stator, a main rotor constituting the lock cylinder and being mounted for rotation in the stator and an auxiliary rotor mounted in the main rotor. A key carrying information can be inserted into the keyhole of the main rotor and turned to rotate the same between angular positions corresponding to an open and closed lock position through an intermediate latched position. A differential drive couples the auxiliary rotor to the main rotor for effecting relative rotational movement thereof. Key information sensing elements sense the key information during the relative rotational movement of the auxiliary rotor and are repositioned thereby, and these elements are taken along by the main rotor rotation at the end stage of the relative movement to remove them from contact with the key and return them to a rest position.

Abstract: A changeable combination key lock for safe deposit boxes and the like, wherein a guard key is insertable into a rotatable guard key plug to set guard key tumblers to permit retracting movement of a bolt, and a renter's key is insertable into a rotatable renter's key plug for engagement with renter's key tumblers to aline them to permit retraction of the bolt. Both the renter's key tumblers and the guard key tumblers are releasable from gate members carried by the bolt and may be set for key configuration for a new renter's key and a new guard key, or either of them, when the lock is conditioned in a change mode to permit adjustment of the lock to operate with different guard keys and renter's keys.

Abstract: A resettable axial pin tumbler lock having a spindle rotatably mounted in a barrel with the spindle and barrel forming a "lock" radial interface and a plurality of cooperating axial wells for receiving axial pins. A plurality of driver pins are disposed in the wells in the barrel and spring biased across the "lock" interface into the wells of the spindle to lock the spindle against rotation in the barrel. A reset ring is rotatably mounted in the barrel with the reset ring and the spindle forming a "reset" radial interface and a plurality of cooperating axial wells for receiving axial pins. A plurality of reset pins are disposed in the wells in the spindle and reset ring in axial alignment and engagement with the driver pins so that the spring bias on the driver pins also applies a biasing force to the reset pins.

Abstract: A cylindrical lock assembly is provided which is approximately the same size as present-day cylindrical "Mortise" locks, and which can replace present-day locks in the doors of hotels, motels, or other establishments, merely by removing the existing lock cylinders and replacing them by the lock cylinders of the invention. The lock assembly of the invention has a number of internal logic ring members which are mounted tandem to one another in coaxial relationship with the central axis of the lock, and which are replaceable to change the key pattern to which the lock will respond. The lock also includes a plurality of spring-biased tumblers, which are moved longitudinally to mating positions with respect to the various logic ring members when the proper keys are inserted in the lock.