Door and window panels for use in building construction, and particularly bi-folding door and window panels. A latch mechanism and associated bolt are provided with a track to guide the bolt and a hinge fixing portion being disposed within the track. The hinge fixing portion provides a point of attachment for the hinge, and is movable within the track so as to be locatable at any level along the door or window panel as desired. The hinge fixing portion and/or track may be configured such that the hinge fixing portion is maintained clear of the bolt to allow the bolt to slide thereunder. In that context, the hinge fixing portion may perform two tasks: firstly the task of providing an anchor for the hinge, and secondly for maintaining itself clear of a bolt within the track.

A lock includes a pair of spaced apart parallel bolts connected by a plate extending between the bolts. A slot, formed in a hinged structure, such as a gate, extends from a free edge of the structure (an edge opposite a hinged edge) to an end point at a determined distance from the free edge. The plate is received in the slot. Each bolt is located on an opposite side of the hinged structure, when the plate is received in the slot. The slot defines a range of sliding motion of the plate and bolts.

A handle for a compartment of a low, medium or high voltage switchgear includes: a body part; a hand grasping part; and a lock. The handle is movable from a closed position to an open position. When the handle is in the closed position, the handle is not useable to open a door of a compartment of the switchgear. When the handle is in the open position, the handle is useable to open the door of the compartment of the switchgear. In the open position, the hand grasping part is positioned so as to be graspable by a human user. In the closed position, a transition of an active element in the compartment of the switchgear from a quiescent state to an active or potentially active state activates the lock. Activation of the lock stops the handle from moving from the closed position to the open position.

A handle for a compartment of a low, medium or high voltage switchgear includes: a body part; a hand grasping part; and a lock. The handle is movable from a closed position to an open position. When the handle is in the closed position, the handle is not useable to open a door of a compartment of the switchgear. When the handle is in the open position, the handle is useable to open the door of the compartment of the switchgear. In the open position, the hand grasping part is positioned so as to be graspable by a human user. In the closed position, a transition of an active element in the compartment of the switchgear from a quiescent state to an active or potentially active state activates the lock. Activation of the lock stops the handle from moving from the closed position to the open position.

A system including a barrier implement, a barrier implement frame, wherein the barrier implement frame is configured to engage said barrier implement, a bolt lock, wherein the bolt lock is configured to secure the barrier implement frame to the barrier implement in a lock position, a central locking and/or release knob, a cable or rod, wherein the cable or rod is configured to interconnect the central locking and/or release knob and the bolt lock, and wherein the central locking and/or release knob is configured to release said bolt lock by pulling in the cable or rod to move the bolt lock out of the lock position.

A system including a barrier implement, a barrier implement frame, wherein the barrier implement frame is configured to engage said barrier implement, a bolt lock, wherein the bolt lock is configured to secure the barrier implement frame to the barrier implement in a lock position, a central locking and/or release knob, a cable or rod, wherein the cable or rod is configured to interconnect the central locking and/or release knob and the bolt lock, and wherein the central locking and/or release knob is configured to release said bolt lock by pulling in the cable or rod to move the bolt lock out of the lock position.

An adapter configured to convert a rotary motion of a drive shaft for a door lock actuating mechanism into a translational motion for actuating a door latch. The adapter includes a housing with a compartment and a first lever inside the compartment, enables retrofitting of US-style doors with a European style door handle by providing a first bearing that rotatably supports the first lever relative to the housing, wherein the first bearing has a first axis of rotation, wherein the housing has a channel, the channel has a first opening facing the lever and a second opening facing away from the lever, wherein a first channel axis extends through the centers of the first and second openings. The first lever has a hole, configured for receiving the drive shaft, wherein the longitudinal axis of the drive shaft correlates with the first axis of rotation. The first lever further has first coupling means for providing a torque proof coupling with the drive shaft. A second bearing pivotably attaches the lever to a connecting rod, where-in the second bearing has a second axis of rotation, wherein the connecting rod has a first connecting element at the end of the connecting rod opposite to the lever. The first connecting element is moveably supported inside the first channel, wherein the channel walls limit a translation of the first connecting element in directions perpendicular to the first channel axis and enable a translation along the first channel axis.

A locking system for securing, within a rectangular frame aperture of a safe, a hinged door having a perimeter and an external side and an internal side and occupying a first vertical plane, the door being configured for suspension on hinges. The locking system comprises a key axle, a disc, a plate. When the key axle is rotated the disc is caused to rotate and the plate slides horizontally to extend a distal end of the plate towards beyond the door perimeter.

A locking system for securing, within a rectangular frame aperture of a safe, a hinged door having a perimeter and an external side and an internal side and occupying a first vertical plane, the door being configured for suspension on hinges. The locking system comprises a key axle, a disc, a plate. When the key axle is rotated the disc is caused to rotate and the plate slides horizontally to extend a distal end of the plate towards beyond the door perimeter.

The present oblique slide latch apparatus includes a housing, lever, and latch. A straight channel is positioned obliquely on the latch and is oblique relative to an axis along which the latch slides. The lever includes first and second pegs that capture inner and outer portions of a latch head to minimize wobble of the latch. The latch head is positioned within opposite sides of the lever.