A lock, in particular for an electric bicycle, includes a locking mechanism that has a latch that is movable between a latched position, which is provided for securing a counter-piece movable relative to the locking mechanism, and an unlatched position provided for releasing the counter-piece. The lock includes a blocking device, including a blocking element that is adjustable between a blocking position, in which the latch is blocked in its latched position, and a release position in which the latch is movable into its unlatched position, and a reception unit for receiving a release signal by which the adjustment of the blocking element into the release position can be brought about. A locking system may include at least one such lock.

A smart door lock may include latch mechanism for locking and unlocking doors; authorization module for authorizing or de-authorizing authority of mechanical key for opening latch mechanism; the mechanical key for inserting into the latch mechanism for unlocking after authorized by the authorization module. Thanks to the structure of smart door lock, there is no need to carry the mechanical key all the time.

A smart door lock may include latch mechanism for locking and unlocking doors; authorization module for authorizing or de-authorizing authority of mechanical key for opening latch mechanism; the mechanical key for inserting into the latch mechanism for unlocking after authorized by the authorization module. Thanks to the structure of smart door lock, there is no need to carry the mechanical key all the time.

A latch includes a housing that has a first side and a second side. The latch includes a bolt assembly that is positioned at least partially within the housing. The bolt assembly includes a bolt movable between an extended position and a retracted position relative to at least one of the first and second sides of the housing. The bolt is biased toward at least one of the extended position and the retracted position, and the bolt is positionable so as to selectively extend from either the first side or the second of the housing in the extended position.

A cabinet including a door, a fastener, and a latch bracket is provided. The fastener is extending at least partially through an aperture in the door. The latch bracket is located on an internal surface of a door frame to secure the door to the door frame. A retainer washer is disposed around the fastener and disposed between the latch bracket and the door in order to retain the fastener when in a disengaged position.

A modularized respiratory treatment apparatus provides various respiratory pressure treatments. The apparatus may be formed by discrete connectable modules such as a flow generator module, alarm module and/or humidifier module. Each module may include its own external casing or housing to independently retain or enclose the respective components that serve the function of the module. Different modules may be adapted with different components and functionalities and may be readily coupled using standardized gas and electrical connection configurations that have flow and communication paths that extend through the modules. When coupled, operation of the respiratory treatment apparatus may be controlled by detection of different modules, such as the alarm module that generates visual and/or audible alarms based on detected conditions, so as to selectively enable or disable different respiratory treatments. The discrete modules of the medical treatment apparatus may include tamper resistant locking mechanisms to impede unauthorized separation of some modules.

An enclosure for improving padlock security is provided. The enclosure includes a sleeve component that has openings at the left and right for receiving the padlock, cutouts at the top to access the shackle holes and a key slot at the bottom for accessing the padlock. A means for supporting the padlock within the sleeve component creates an empty space between the bottom of the padlock and the bottom of the sleeve component. The sleeve component containing the padlock is inserted into a tubular component. The tubular component has walls forming the tubular component, an opening at the bottom for receiving the sleeve component and padlock, one or more stoppers, capable of contacting the body of the padlock preventing further insertion of the padlock, while allowing the shackle to continue past, two directly opposing openings on the walls of the enclosure, and an opening at the top for accessing the shackle.

An exemplary electric strike includes a housing and a keeper pivotally mounted in the housing. The strike also includes a plunger having an extended position and a retracted position, a cage including an aperture, and a locking element movably seated in the aperture. The locking element is engaged with the plunger, and the plunger is structured to urge the locking element radially outward as the plunger moves from an extended position toward a retracted position. The strike also includes a sleeve, a transmission engaged with the sleeve, and a motor drivingly coupled to the transmission. The sleeve is structured to selectively prevent radially outward movement of the locking element and retraction of the plunger. The strike also includes at least one of a lost motion connection and an anti-tamper mechanism.

A mortise lockset for a sliding door or double door includes adaptations to make it more resistant to blunt-force attacks. The lockset includes retractable locking hooks, tabs or catches that extend above and below a bolt to securely lock the door. The mechanism, which uses no springs to bias the catches, cams the catches to varying positions as the bolt travels between its retracted and projected positions. Pivotally mounted levers incorporating or carrying the catches include a contoured edge that cams upon cam posts to drive the catches between withdrawn and lockingly engaged positions into or from the bolt. The lockset also includes a channel shaped to cause the thumbturn tail to obstruct retraction caused by blunt forces exerted on the door or doorframe itself, proximate to the bolt.

A door safety barricade capable of preventing an intruder from entering through a door in a classroom, a school, an office building, and the like, when the device is in an engaged, locked position and wherein the selected authorities will be automatically notified as the locking device passes by the sensor while being engaged.