The proposed handcuff in the invention employs an innovative locking mechanism, which stops further tightening of the handcuff when the force applied on the wrist of hand or ankle of foot is greater than 1.5 lbs (or any preset value), and prevents physical injuries from over-tightening without compromising the restrain. A notch on the first tooth of the left/right stop pawl prevent the handcuff from being shimmed, a floating pawl keeps the middle stop pawl sticking with the stop ratchet when it moves 2-5 mm sideways. The handcuff is 50% faster in restraining by automatically locking instead of manually push-to-locking. The handcuff has the same shape/size/cost of the handcuffs currently used by police officer, and is compatible with current training procedure or SOP.

An anti-theft and safety mechanism for bottles is described, comprising a case, first locking and unlocking means, and second locking and unlocking means adapted to be actuated, when locking, through a manual action, after the mechanism has been inserted onto the neck of a bottle and, when unlocking, as consequence of the unlocking action exerted on the first locking and unlocking means, allowing the removal of the mechanism from the neck of the bottle, wherein the first locking and unlocking means comprise a hook which is adapted to fasten a collar of the bottle, and the second locking and unlocking means comprise a first half-circular element adapted to be moved in contact with the neck of the bottle preventing the access to the tip of the hook.

A stopper for stopping rotation of a planar element with respect to a frame when the planar element is hinged to the frame, the stopper has a longitudinal axis and comprises: a locking bar having a toothed surface and received within an indentation, an operation handle for moving the locking bar out of the indentation, a locking spring having a locking tooth that is urged into the toothed surface, a releasing lever for releasing the locking tooth from the toothed surface, a retention spring for urging the locking bar into the indentation. A linear movement of the operation handle moves a portion of the locking bar out of the indentation, the locking bar abuts against the frame, and, the locking bar is fixed in its position by means of the locking tooth that is urged against the toothed surface.

The locking system can have an outer housing mounted to an outside face of the door, and an inner housing mounted to an inside face of the door, a wire conduit mounted to one of the inner housing and the outer housing and extending across the door to the other one of the inner housing and the outer housing, the wire conduit having two telescoping members, and at least one wire extending inside the wire conduit and connected between a first locking system component housed in the outer housing and a second locking system component housed in the inner housing.

A sash window restrictor (20) has a housing (22) which is to be let into a vertical frame member (10) of one sash (normally the upper, outer sash) of a window, at a position, say, 10 cm above the top rail of the lower sash when the windows are closed. A tab (24) is mounted in the housing and can be retracted into the housing or extended from the housing. A mechanism acts between the tab and the housing and allows the tab to be pressed into the housing and held in the housing for a period of time before the tab is released to allow the tab to extend. With the tab extended, the lower sash (12) can be lifted until it reaches the tab (24) but no further, so that a 10 cm gap will be opened at the bottom of the window.

Lock assemblies having cylinders with interchangeable cores are provided. In one embodiment a lock assembly comprises a cylinder including a keyway and a core. Also, the lock assembly includes a first driver operatively connected to the cylinder. In particular, key cuts of the core are changeable without removing the cylinder from the driver.

A sash window restrictor (20) has a housing (22) which is to be let into a vertical frame member (10) of one sash (normally the upper, outer sash) of a window, at a position, say, 10 cm above the top rail of the lower sash when the windows are closed. A tab (24) is mounted in the housing and can be retracted into the housing or extended from the housing. A mechanism acts between the tab and the housing and allows the tab to be pressed into the housing and held in the housing for a period of time before the tab is released to allow the tab to extend. With the tab extended, the lower sash (12) can be lifted until it reaches the tab (24) but no further, so that a 10 cm gap will be opened at the bottom of the window.

Personal restraints are described, including a user-accessible button that can be pushed in sliding a lock bar into a double lock position.

A door-lock device for appliances, such as dishwashers, is provided. The door-lock device includes a support, and a lock wheel rotationally carried by the support around an axis of rotation. The lock wheel includes a hub and a plurality of locking arms that radially protrude from the hub. The hub may include a plurality of retention surfaces, and at least one retention element. The at least one retention element may be elastically pressed into contact with the hub to hold the lock wheel in a plurality of locking positions.

The proposed handcuff in the invention employs an innovative locking mechanism, which stops further tightening of the handcuff when the force applied on the wrist of hand or ankle of foot is greater than 1.5 lbs (or any preset value), and prevents physical injuries from over-tightening without compromising the restrain. The handcuff is 50% faster in restraining by automatically locking instead of manually push-to-locking. The handcuff has the same shape/size/cost of the handcuffs currently used by police officer, and is compatible with current training procedure or SOP.