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: A lock apparatus includes a lock provided with a cylindrical plug having a keyway widened to form a slot adjacent the bottom surface of the plug for receiving a master pin from a top pinway of the lock. The slot has shoulders at the opposite ends thereof to prevent removal of the master pin from the lock. If the lock has been assembled, the plug is removed to facilitate forming the slot, removing any ribs that are at the bottom of the keyway and inserting a master pin between the driver pin and the tumbler pin in a first one of the pinways.A transfer key has bittings for positioning the master pin in the top portion of the first pinway with the bottom of the master pin aligned with the shear interface. A transfer tool is slidable relative to the transfer key on the side thereof opposite to the bittings and has a cut for receiving the master pin from the first pinway.

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: The invention relates to a cylinder lock including a number of locking discs (4) turnable by means of the key (8) of the lock and separated from each other by intermediate discs (5) and provided with a key opening (6) and with a peripheral notch (7), and a locking bar (3) which, when the lock is in the locking position, prevents turning of the set of discs and force transmission from the key (8).

Abstract: Disclosed is a keylock having a key settable lever tumbler which can be bent, by use of an operating key, from an initial neutral configuration to set it to the operating key, and which by use of a change key can be restored to its initial configuration and then reset to other operating keys. The tumbler can be rebent and reset to different keys a substantial number of times. The accuracy of the rebending is assured by imparting an overbend which accommodates the spring back that accompanies the rebending.

Abstract: Disclosed is a key changeable lock of the lever tumbler type wherein at least one tumbler has a series of seats which are alternatively engageable with a fixed pivot. A biasing spring urges the tumbler seats toward the pivot and tends to hold a particular seat against the pivot to define the axis of tumbler rotation. To change the combination, the tumbler is positively shifted along the series of seats by turning a key which bears against the tumbler and overcomes the biasing force of the spring, displacing one seat from the pivot and shifting the tumbler until another seat engages the pivot.

Abstract: This invention relates to a security device for removably locking two mobile elements together, for example a door and the frame on which it is mounted. In particular, the device is in the form of a lock, and is intended for fixing to one of the elements, for example a door, and includes an engagement member such as a bolt, able to move from an engagement position to a disengagement position and vice versa, control means, for example a key for the engagement member, and one or more elements for transmitting the operation of the control means to the engagement member. Each transmission element comprises two or more sectors able to move towards and away from the respective transmission element. Each sector cooperates with a sliding rocker element able to interact with the engagement member and be controlled sequentially by the control means by way of one or more transmission elements, to allow movement of the engagement member.

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 cylinder lock comprising a stationary cylinder housing and therein a turnable cylinder inclosing a plurality of tumbler discs turnable by means of the key of the lock. There is also a locking bar normally locking the cylinder non-turnably to the cylinder housing. When the tumbler discs have been brought to a releasing position, the locking bar can move closer to the center of the lock into a groove formed by alignment of peripheral recesses in the tumbler discs, and this releases the cylinder from its locking. In the lock there is also at least one composite tumbler disc including two parts, a first part and a second part, which are angularly adjustably connected to each other. The first part can be turned with a key. Within an adjustment sector the first part has such a small radial extension that it leaves the locking bar free to move radially to its cylinder-releasing position.

Abstract: The specification describes a lock and coded key for operating the lock. The lock comprises a housing having a keyhole, a rotatable actuating member, a locking mechanism provided with a lockable portion moveable from a locking position to an unlocking position, first locking means, second locking means, a pusher member for pushing the key into contact with the first locking means, and a locking member. The lockable portion is normally held in the locking position by the first locking means. The second locking means is normally in a release position but is arranged so as to lock the lockable portion in its locking position when a key bearing an incorrect code is inserted in the lock. The key is coded to move the first locking means to a release position without disturbing the second locking means. The lockable portion is tensioned to move to the unlocking position when both the first and second locking means are in a release position.

Abstract: A pin tumbler lock has a housing, a cylindrical key plug provided with a keyway rotatable in the housing, a shear line between the plug and the housing, pin tumbler bores with aligned parts respectively in the housing and the key plug and spring pressed outer and inner pin tumblers in each bore. In one of the bores is an extra frangible graphite tumbler of substantially the diameter of the other pin tumblers. When construction key is inserted in the keyway the graphite tumbler and the other pin tumblers meets at the shear line permitting the lock to unlock. When construction is finished a conversion key is inserted in the keyway and the graphite tumbler is shifted to a position crossing the shear line whereupon the graphite tumbler is shattered by rotation of the key plug. Thereafter the lock can not be unlocked by the construction key but can be unlocked by the householder's key.

Abstract: A lock construction for a safe deposit box requires two keys for operation of the bolt. The first key is provided by the vault guard and the second key is provided by the customer. Each key activates a separate set of wafer-like tumblers by rotating the tumblers in response to rotation of the key. Each set of tumblers includes a plurality of key engaging drive tumblers which are gear engaged with gate tumblers. Appropriate rotation of the keys orients a notch of the gate tumblers that permits withdrawal of the bolt. Stops are provided on the bolt cooperative with key operated shifters to insure sequential operation of the keys. A change key tool may be inserted from the back side of the lock to disengage the drive and gate tumblers. Subsequent to disengagement of the tumblers, it is possible to substitute one or both of the keys and thus change the relative gear engagement of the tumblers.

Abstract: A lock and key assembly wherein the key is adapted to co-operate with the lock is characterized in that the key has adjustable formations thereon, and the lock has complementarily adjustable tumblers so as to afford a variable combination of the lock and key assembly.