A lockdown system for use in a building including multiple rooms with doors providing access to the rooms, the lockdown system including: at least one room lockdown component provided in each of a plurality of the rooms, the room lockdown components comprising door-securing devices that are external of the doors and, in a deployed condition of the room lockdown components, are manually positioned inside said rooms to oppose inward movement of the doors and thereby block or secure the doors, the room lockdown components further characterized by a non-deployed condition in which the door-securing devices are positioned at storage locations inside the rooms, and wherein further each room lockdown component is operative to automatically signal initiation of a lockdown event when its door-securing device has been moved from its storage location; and at least one communication device operative to receive the signaled initiation of a lockdown event when any one or more of the door-securing devices have been moved from their storage locations, and to provide an alert notification of the initiation of the lockdown event.

A mechanism for selectively coupling a first moving part with a second moving part. The mechanism includes and engaging member that is movable between a detent position, a uncoupled position, and a coupled position in which the load transferring surface is within the aperture. A biasing member biases the engaging member into the detent position or coupled position. The engaging member overrides the biasing force and moves out of the detent position into the uncoupled position when first and second moving parts move relative to each other. When the engaging member is in the coupled position, the first and second moving parts are coupled for movement together. One embodiment of the invention is a child safety door handle rotating on a spindle. Other embodiments include water faucets, stove or burner controls, or any other rotatable or movable parts.

Examples described herein include latch mechanisms for covers. In some examples, an electronic device has an enclosure, a cover, and a latch mechanism. The enclosure may include an opening. The latch mechanism may include a rotatable arm, a spring to bias the rotatable arm to secure the cover to the enclosure, and a cam moveable between a rest position and an engaged position. In the engaged position, the cam moves the rotatable arm to release the cover.

A door handle set includes a handle assembly having a primary lock and having a handle rotatable about a primary rotational axis. A latch bolt assembly has a latch bolt. The latch bolt assembly is operatively coupled to the handle assembly, wherein a rotation of the handle results in a linear translation of the latch bolt. A supplemental lock has a second axis parallel to, and spaced apart from, the primary rotational axis. The supplemental lock has an actuator that is operable relative to the second axis. The supplemental lock is configured to selectively block the rotation of the handle regardless of the locking state of the primary lock.

An example lock apparatus generally includes a housing, a latch spindle, a drive spindle, an electronic lock mechanism, and an override mechanism. The latch spindle is mounted for rotation relative to the housing, and is operable to actuate a latch mechanism. The drive spindle is mounted for rotation relative to the housing. The electronic lock mechanism is disposed in the housing, and is operable to selectively couple the drive spindle with the latch spindle. The override mechanism is disposed in the drive spindle, and is operable to selectively couple the drive spindle with the latch spindle.

A push and/or pull handle lockset, comprising: latch tongue (4) in first extended position, and operable to second retracted position; biasing means (6) urging the latch tongue (4) in first position; a linking means (12) to link the latch tongue to the actuator (16); sliding shaft (20) extending through lockset roses (27, 36), and operable from first position to second operating position; a biasing means (26) urging the sliding shaft to first position; an engagement means (21) for sliding shaft (20) to engage with actuator (16); lock accommodations (22, 30) for locking means; actuator (16) to translate movement of said sliding shaft to operate latch tongue (4) into second position; locking means (45) interposed between the lockset roses in parallel alignment with sliding shaft (20) including latch arm (46) which is rotatable in and out of lock sockets (22, 30); lockset unit operation is reversed by rotating the lockset unit one hundred and eighty degrees (180°) about it's horizontal lateral axis, changing the direction of actuator (16) or handle (43, 44) operation.

A door lock device is provided and includes: a housing, an acting assembly arranged in the housing and having a lock tongue, an operating assembly arranged in the housing and interlocked with an outdoor handle, and a regulating assembly arranged in the housing for a user to regulate the operating assembly into an interlocking state or an idle state. As such, in the interlocking state, the outdoor handle drives the acting assembly through the operating assembly to cause the lock tongue to extend or retract relative to the housing, and in the idle state, the operating assembly cannot drive the acting assembly and the outdoor handle cannot be interlocked with the lock tongue.

The present invention relates to the field of a dead-locking control technology of a door lock, and discloses a dead-locking control mechanism, including: a latch, fixed on a to-be-locked object and configured to cooperate with an external spindle assembly-set and a door frame, a bolt of the latch moving towards an exterior of the latch to extend or retract; a spindle assembly-set, one end of which is detachably linked with and fixedly going through the latch and is configured to drive the bolt to move towards the exterior of the latch to extend or retract, and the other end may include a detachably fixed and connected object to drive operation of the spindle for using; and a dead-locking control assembly-set, configured to control the spindle assembly-set to stop continuous movement, arranged at one end of a driving part of the spindle assembly-set and driven by an external force.

A compression latch assembly for latching a panel to a frame includes a housing assembly, a lockplug assembly, a handle actuator assembly, and a rotating pawl assembly. The housing assembly defines an exterior well and a first and second compartment. The lockplug assembly resides within the first compartment and includes a lockplug having a circumferential guide surface. The handle actuator assembly has a handle within the exterior well, a crank coupled to the handle, and a drive shaft coupled to the crank. The handle and the crank rotate about common pivot point within the second compartment. The handle is selectively captured and ejected by interaction between the circumferential guide surface and a locking pin on the handle. The rotating pawl assembly has a hook defining a slot that receives the drive shaft. Pivotal movement of the handle actuates the hook by movement of the drive shaft within the slot.

The pushbutton combination lock has a lock bolt mechanism with a lock bolt movably mounted on a frame between a locking position and an unlocking position. The lock bolt mechanism further has two lock bolt actuating mechanisms arranged to move the lock bolt between the locking position and the unlocking position. The lock has a pushbutton combination locking mechanism for locking the first lock bolt actuating mechanism to prevent the lock bolt from being moved by the first lock bolt actuating mechanism to the unlocking position while the second lock bolt actuating mechanism is independent from the pushbutton combination locking mechanism. The pushbutton combination locking mechanism is further rotatably or slidably mounted to the frame such that the user can choose the side for locking and the side for free operation.