Abstract:
A lock including a housing having an opening for a locking bolt, a locking bolt movable between a locked position and an unlocked position, an actuator positioned within the housing, and a rotary blocking device that prevents the locking bolt from moving to the unlocked position is disclosed. The lock may optionally include a tamper resistant mechanism that is designed such that attempting to forcibly move the locking bolt from the locked position to the unlocked position while the actuator remains in the locked condition causes the locking bolt to engage the tamper resistant mechanism.
Abstract:
A safe door lock with a servo motor (34) operated cam (33) is described. A retracting lever (26) is pivotally secured to the locking bolt (15) and is displaced on a pivot connection with the bolt (15) by the cam (33). The position of the cam (33) and the bolt (15) are detected by microswitches. When the retracting lever (26) is in a locking position, the bolt (15) cannot be retracted within the lock housing (11). The cam (33) is operated by a servo motor (34) and locked in position by the gear train which includes a worm gear (64, 67). The locking bolt (15) may be a slam bolt having a spring (50) biased latch (16) which slides therewith or the locking bolt (15) may be a deadbolt when the lock is used with a boltwork system of a vault door.
Abstract:
An anti-tamper locking assembly for locking a position of a block, such as a locking bolt in an electronic lock, electrically moves a pin to engage or dis-engage the block. When dis-engaged, the block can be moved and access or the like can be made. The pin is selectively moved electronically in order to allow access, entry or the like. The pin can be moved with, e.g., a solenoid. The pin has an overhanging portion, or a head portion. In order to prevent an individual from forcing the pin into an un-locked position, the head portion operates in conjunction with at least one spring-arm member and a blocker which are fixed to the block to prevent a user from being able to strike the device with a hammer or the like to "temporarily" move the pin to a position allowing the block to be moved and access or the like to be made.
Abstract:
An anti-tamper locking assembly for locking a position of a block (202), such as a locking bolt in an electronic lock, electrically moves a pin (4060) to engage or dis-engage the block (202). When dis-engaged, the block (202) can be moved and access or the like can be made. The pin (4060) is selectively moved electronically in order to allow access, entry or the like. The pin (4060) can be moved with, e.g., a solenoid (209). The pin (4060) has an overhanging portion, or a head portion (4060A). In order to prevent an individual from forcing the pin (4060) into an un-locked position, the head portion (4060A) operates in conjunction with at least one spring-arm member (4010, 4020) and a blocker (4040) which are fixed to the block (202) to prevent a user from being able to strike the device with a hammer or the like to "temporarily" move the pin (4060) to a position allowing the block (202) to be moved and access or the like to be made.
Abstract:
A lock mechanism having a mechanical combination lock and an electronic lock, wherein the mechanical combination lock serves for effecting a fail safe entry in case of failure of the electronic lock. More specifically, the lock mechanism includes a mechanical combination lock having a bolt-retracting linkage (145) which is tripped by inward movement of a dial into a first operative relationship with a driver on the drive spindle. An electronic latch prevents bolt retraction by this bolt-retracting linkage when in the first operative position until the electronic latch has been operated. However, when the tumblers of the lock have been aligned and a gate bar enters the tumblers, the bolt-retraction linkage is caused to assume a second operative relationship with the driver so as to permit bolt retraction despite the latching effect of the electronic lock.
Abstract:
A relocking mechanism that blocks the path of a bolt within a lock assembly is presented. The relocking mechanism comprises a breakaway member that is repositioned when the lock assembly is attacked by some mechanical means, such as impact applied via a hammer and punch to the lock housing through a spindle hole in a door. The breakaway member prior to attack holds a preloaded relocking plunger clear from bolt movement. When the breakaway member is repositioned upon attack, the plunger is free to move under a biasing force into position so as to block the bolt thus keeping the lock in a secure locked state regardless of the state of the locks default blocking mechanism.
Abstract:
The present invention relates generally to radiographic imaging of storage devices and more particularly, to a method and device for protecting a storage device from radiographic imaging. Security devices are available which, if their inner workings could be discovered, would be ineffective and therefore would no longer prevent undetected, unauthorized discovery of objects they are designed to secure. An example is a mechanical combination lock which, if the position of its various internal components could be ascertained, would allow unauthorized access. In addition, it is also important in some instances to prevent unwanted radiographic imaging of a storage device so that its contents cannot be ascertained. The current art of radiographic imaging has significantly increased the possibility of this type of intrusion into areas protected by such high security devices. Other types of locks, closures, fasteners, and bolts that protect by mechanically restricting access and which are themselves assumed secured because of the inability of an intruder to ascertain the position of their locking mechanism are also vulnerable to radiographic imaging.
Abstract:
A resistant mechanical combination lock and improvements thereto is described herein to include one or more of the following features: an improved combination change/set feature including a tumbler interlocking lever (132, 133) with digitated micro-fingers (135) for interdigitating with digitated micro-fingers (131') on the peripheral edge of a combination tumbler ring (131), the lever (132, 133) and the ring (131) sandwiched between outer gate rings (130a, 130b) to form a tumbler wheel assembly; a key stabilization feature in which an internal boss (126) and a pivot recess (125') together help stabilize the change key (122) when changing the combination of a lock to help prevent "lock out"; an improved duress feature including a duress tumbler wheel assembly (200, 250) (including a duress lever (201, 251)) and an interchangeable microswitch (220, 270); and/or a fence control feature preferably including an overcenter spring (330) and trigger plate (333) for controlling fence contact with the drive cam (308).
Abstract:
Various enhancements are provided to a pushbutton lock to enhance its security. One is the provision of button tips that are mounted on the ends of the button assemblies and spring-loaded to protrude from the face of the lock, regardless of whether the underlying button is "in" or "out". By this arrangement, a bystander cannot readily see the button combination by the pattern of depressed buttons. This arrangement also reduces tactile feedback between the underlying button assembly and the externally available button tips, increasing resistance to pick attacks. A further enhancement is the provision of button bars between adjacent pairs of button tips. Whenever any of the button tips is manually depressed, the corresponding button bar is pressed into engagement with, and prevents movement of, a member that must be moved in order to unlock the lock. This arrangement further increases lock security by preventing an attacker from experimentally pressing buttons and judging the tactile effect thereon in attempted unlockings of the lock.
Abstract:
A mechanism for locking the back cover (120) of a combination lock to the lock housing is described having two sequentially and phased moveable parts (20, 66), each having an aperture (100, 110) through which a locking member may be inserted, the apertures (100, 110) are disposed in parts (20, 66) moveable in parallel and adjacent planes and a portion of each aperture (100, 110) is at all times aligned with the other aperture such that a third member (122) may extend through the apertures. The apertures (100, 110) have enlarged portions (104, 114), which will pass the third member (122), and channel portions (102, 112), which prevent withdrawal of the third member (122) while permitting movement of the moveable parts (20, 66). The third member (122) is carried by the back cover (120) of the lock and can only be withdrawn by sequentially withdrawing from a first of the moveable parts (66), shifting the moveable parts to a second position and withdrawing from a second moveable part (20). The back cover (120) may thus be only removed by starting with the bolt (20) in an extended position and locked condition and prior to final withdrawal of the third member (122), withdrawing the lock bolt (20) to an unlocked position, necessitating possession of authorization to unlock the lock in order to remove the back cover (120).