Abstract: An operating mechanism unit includes a motor, a worm wheel being rotated by the motor, a sector gear meshing with a pinion provided on one side of the worm wheel and rotating to an unlocking position and a locking position, switch levers connected to the sector gear and shifting to an unlocking position where engagement with a meshing mechanism is releasable and a locking position where the engagement cannot be released, and a key sub-lever pivotally supported on the same pivot on which the sector gear pivots. The key sub-lever is rotatable from a neutral position in an unlocking direction and a locking direction in synchronism with operation of a key cylinder so as to rotate the sector gear to the unlocking position by rotating in the unlocking direction and to rotate the sector gear in the locking direction by rotating in the locking direction.

Abstract: The invention generally relates to a latch apparatus having a locking live bolt. One embodiment of the invention is a latch apparatus having a housing with opposed plates that are spaced apart and secured to each other by support arms formed from the plates. A live bolt of the apparatus is slidably mounted in the housing and horizontally actuated between an extended and a retracted position. A live bolt hub is mounted in the housing and actuates the live bolt. A slide, actuated by a rotatable cam, is mounted in the housing and moves vertically between a first position and a second position. In the first position the slide is disengaged from the live bolt, and in the second position the slide locks the live bolt in an extended position.

Abstract: A door lock device is disposed on a door (1). The door (1) has an upper through hole (11) and a lower through hole (12). The door lock device has a latch bolt device (6) disposed on the door (1), a case frame (2) having an upper hollow cylinder (22) inserted through the upper through hole (11) and a lower hollow cylinder (23) inserted through the lower through hole (12), a first pressing plate (8) disposed on the case frame (2), a core (3) disposed in the upper hollow cylinder (22), a lock fastener device (4) disposed in the upper hollow cylinder (22), and a drive mechanism (5) disposed in the upper hollow cylinder (22). The drive mechanism (5) has a rack (53) to drive the latch bolt device (6). A locking plate (71) covers the upper through hole (11) and the lower through hole (12). A decoration plate (72) is disposed on the locking plate (71). A second pressing plate (8′) is disposed on the decoration plate (72).

Abstract: This invention relates to a bolt unit and frame arrangement. In particular it relates to a lockable bolt unit having a slidable bolt, typically for securing two moveable panels together or for securing one moveable panel to a fixed frame.

Abstract: Methods and apparatus for releasably locking or blocking a door combine a first element with that door for blocking the door in an extended position of that first element and for alternatively releasing the door upon movement of the first element from such extended position. The first element is releasably blocked in its extended position by removably locating a second element in a path of movement of the first element. The door may be locked by locking the first element in its extended position and blocking such locked first element with the second element. The locked first element is released by selectively removing the second element from the path of movement of the first element, and the door is released by moving the released locked first element in its path of movement while the second element is removed from such path of movement. The first element may selectively be unlocked while it is blocked by the second element, and such blocked unlocked first element may be removed for a release of the door.