Methods, nodes, a power tool and computer programs for and in a power tool (100) for enabling unlocking and locking of the power tool for prevention of unauthorized use, the method comprising receiving (S100) an unlock message to a control unit (210), the message including an instruction to unlock the tool (100), unlocking (S110) the power tool (100) according to the instruction by the control unit (210) via an actuator unit (250), counting (S120) an authorization time period from reception of the first message to the control unit (210) by a counter (230), wherein when the counted authorization time period exceed a predetermined threshold, locking (S130) the power tool (100) by the control unit (210) via the actuator unit (250), thereby enabling prevention of unauthorized use of the power tool (100) by remote unlocking and locking.

A system and method for the controlled dispensation of cigarettes including a container with a logic control unit and an unlocking button by means of which an unlocking request is sent to the logic control unit so that the logic control unit switches a clamping device to an unlocked mode if the unlocking request occurs during one dispensation time interval.

A method for unlocking the lock using real-time wireless power supply includes proceeding with authentication identification of a powerless lock by an electronic key after pairing. Power is wirelessly supplied from the electronic key to the lock when the authentication identification starts or the authentication identification passes. The lock obtains the power wirelessly supplied from the lock to operate. When the authentication identification is identified as being successful, the electronic key outputs an unlocking command to the lock. The lock receiving the unlocking command proceeds with an unlocking operation using the power supplied wirelessly.

A present invention relates to a digital doorlock including a latch bolt self-loosening structure which includes an authenticator which receives an authentication signal and performs authentication; a motor which is driven in a predetermined direction when authentication is performed by the authenticator; a latch operator which can be operated through driving of the motor; and a shaft which is rotated according to operation of the latch operator and operates a latch bolt, wherein the latch operator releases the latch bolt by operating according to the authentication and rotating the shaft in one direction.

A 3D printer having a door lock structure includes a housing, a door panel, a door lock structure, a coloring nozzle set, an actuator, and a controller. The door panel is pivotally connected to the housing. The door lock structure is arranged corresponding to the door panel and has a locking position and an unlocking position. The actuator is connected to the door lock structure and drives the door lock structure to lock or unlock the door panel. The controller is electrically connected to the actuator. The controller controls the actuator to drive the door lock structure to the locking position. The controller activates an unlocking mode after a predetermined time after the coloring nozzle set stops operating. In the unlocking mode, the controller controls the actuator to drive the door lock structure to the unlocking position.

A doorknob indicating system includes an exterior doorknob disposed on an interior side of a door, an interior doorknob disposed on an exterior side of the door, an LED on an escutcheon of said exterior doorknob, a user interface on an escutcheon of said interior doorknob, a source of electrical power, and a controller. The LED, the user interface, and the source of electrical power are operatively connected to the controller. The controller is programmed to illuminate the LED for one or more determined time intervals based upon an input received by the user interface.

A door security system and method may increase the home security for elderly people without limiting the privacy of or convenience for residents. The method comprises detecting closing of a door; keeping a first locking mechanism of said door in an open position for a first predetermined period of time after said closing; after said predetermined period of time, changing said first locking mechanism into a locked position. The re-entry time frame permits a user to re-enter without a key, immediately after realizing they forgot it. The method may further comprise recognizing motion of a person on a door of a house through a camera provided in or near the door; producing streaming footage; sending the streaming footage to a central processing server; processing the streaming footage for face recognition purpose and checking against several; and storing all data on the server.

Methods, nodes, a power tool and computer programs for and in a power tool (100) for enabling unlocking and locking of the power tool for prevention of unauthorized use, the method comprising receiving (S100) an unlock message to a control unit (210), the message including an instruction to unlock the tool (100), unlocking (S110) the power tool (100) according to the instruction by the control unit (210) via an actuator unit (250), counting (S120) an authorization time period from reception of the first message to the control unit (210) by a counter (230), wherein when the counted authorization time period exceed a predetermined threshold, locking (S130) the power tool (100) by the control unit (210) via the actuator unit (250), thereby enabling prevention of unauthorized use of the power tool (100) by remote unlocking and locking.

A latch assembly comprising: a latch operative to adopt a latched condition and an unlatched condition; a magnet imparting a magnetic field; a sensor adapted to sense the magnetic field; the latch, magnet and sensor being configured such that a change in the condition of the latch effects a variance in the magnetic field sensed by the sensor such that the sensor is able to distinguish between the latched condition and the unlatched condition.

A latch assembly comprising: a latch operative to adopt a latched condition and an unlatched condition; a magnet imparting a magnetic field; a sensor adapted to sense the magnetic field; the latch, magnet and sensor being configured such that a change in the condition of the latch effects a variance in the magnetic field sensed by the sensor such that the sensor is able to distinguish between the latched condition and the unlatched condition.