Abstract: A locking device includes a spindle follower linkage coupled with a latch and rotatable between a locked position and an unlocked position. A locking block is formed with a pin hole. A pin is insertable through an opening of a housing and into the pin hole. A locking block spring for biasing the locking block in a first position where the pin is inserted into the pin hole and the locking block is disengaged from the spindle follower linkage, and a second position where the pin is removed and the locking block is pushed towards and engaged with the spindle follower linkage, thereby holding the spindle follower linkage in the locked position. A spring unit is held inside the pin hole to facilitate ejection of the pin.

Abstract: A mechanical clutch for mechanically connecting and disconnecting a rotational drive member and a rotational driven member of a locking mechanism. The mechanical clutch includes a drive and a driven member for rotation around an axis of rotation, a clutch pin which engages with the drive and or driven member to mechanically and rotationally link the drive and driven member to one another, and a clutch pin engagement surface provided on the or each clutch pin. A corresponding clutch pin engagement surface is also provided on the drive or driven members such that, when the engaged drive and driven members are rotated against a magnitude of rotational resistance (which is below a threshold magnitude of rotational resistance) the respective clutch pin engagement surfaces of the clutch pins and drive or driven members will co-act with one another to retain said rotational connection between the drive and driven member.

Abstract: A locking device includes a spindle follower linkage coupled with a latch and rotatable between a locked position and an unlocked position. A locking block is formed with a pin hole. A pin is insertable through an opening of a housing and into the pin hole. A locking block spring for biasing the locking block in a first position where the pin is inserted into the pin hole and the locking block is disengaged from the spindle follower linkage, and a second position where the pin is removed and the locking block is pushed towards and engaged with the spindle follower linkage, thereby holding the spindle follower linkage in the locked position. A spring unit is held inside the pin hole to facilitate ejection of the pin.

Abstract: A locking device includes a spindle follower linkage coupled with a latch and rotatable between a locked position and an unlocked position. A locking block is formed with a pin hole. A pin is insertable through an opening of a housing and into the pin hole. A locking block spring for biasing the locking block in a first position where the pin is inserted into the pin hole and the locking block is disengaged from the spindle follower linkage, and a second position where the pin is removed and the locking block is pushed towards and engaged with the spindle follower linkage, thereby holding the spindle follower linkage in the locked position. A spring unit is held inside the pin hole to facilitate ejection of the pin.

Abstract: A locking apparatus includes an actuating hub rotatably mounted on a base, a handle connected with the actuating hub, a control plate provided adjacent to the actuating hub and formed with a plurality of teeth, two locking tumblers, and a series of button engagement disc clutch plates and coding disc clutch plates mounted on the locking tumblers, whereby pressing a selected group of buttons rotates their respective button engagement disc clutch plates and coding disc clutch plates such that cut-out apertures formed on the coding disc clutch plates align with the teeth of the control plate, thereby allowing movement of the control plate and rotation of the actuating hub when the grip handle is rotated. The apparatus also includes a code change button and a reset button.

Abstract: A locking apparatus includes an actuating hub rotatably mounted on a base, a handle connected with the actuating hub, a control plate provided adjacent to the actuating hub and formed with a plurality of teeth, two locking tumblers, and a series of button engagement disc clutch plates and coding disc clutch plates mounted on the locking tumblers, whereby pressing a selected group of buttons rotates their respective button engagement disc clutch plates and coding disc clutch plates such that cut-out apertures formed on the coding disc clutch plates align with the teeth of the control plate, thereby allowing movement of the control plate and rotation of the actuating hub when the grip handle is rotated. The apparatus also includes a code change button and a reset button.

Abstract: A locking device includes a spindle follower linkage coupled with a latch and rotatable between a locked position and an unlocked position. A locking block is formed with a pin hole. A pin is insertable through an opening of a housing and into the pin hole. A locking block spring for biasing the locking block in a first position where the pin is inserted into the pin hole and the locking block is disengaged from the spindle follower linkage, and a second position where the pin is removed and the locking block is pushed towards and engaged with the spindle follower linkage, thereby holding the spindle follower linkage in the locked position. A spring unit is held inside the pin hole to facilitate ejection of the pin.

Abstract: The present application is directed to a mechanical combination lock which includes a base having a cavity, a central shaft provided inside the cavity, and a plurality of combination control units provided on the central shaft, wherein each combination control unit includes a combination disc having at least three combination regions that correspond respectively to different combination conditions. The present application provides the mechanical combination lock whereby one button can set a combination with 2 or more bits. That means repeating characters can appear in a combination sequence. This can greatly increase the complexity of the combination sequence and can prevent cracking of the combination sequence without increasing the number of buttons on the mechanical combination lock.

Abstract: The present application is directed to a mechanical combination lock which includes a base having a cavity, a central shaft provided inside the cavity, and a plurality of combination control units provided on the central shaft, wherein each combination control unit includes a combination disc having at least three combination regions that correspond respectively to different combination conditions. The present application provides the mechanical combination lock whereby one button can set a combination with 2 or more bits. That means repeating characters can appear in a combination sequence. This can greatly increase the complexity of the combination sequence and can prevent cracking of the combination sequence without increasing the number of buttons on the mechanical combination lock.