For motion transformation an apparatus includes a key and a plunger. The key moves along a first axis in a linear key displacement direction and along the first axis in a linear key return direction that is opposite the key displacement direction. The key includes a motivating arm on a distal end. The motivating arm includes a displacement cam surface disposed on a ventral side of the motivating arm and a return cam surface disposed on a dorsal side of the motivating arm. The plunger moves along a second axis. The plunger includes a displacement interface that is motivated by the displacement cam surface in response to the key moving in the key displacement direction to motivate the plunger in a plunger displacement direction. The plunger further includes a return interface.

A latch mechanism includes a handle connected to a pin by a linkage. The linkage converts rotation of the handle relative to a frame into axial movement of the pin between extended and retracted positions relative to the frame. The pin engages with a pre-load adjustment mechanism in the extended position to apply a pre-load through the linkage that biases the pin toward the extended position. The pre-load adjustment mechanism is adjustable to set the pre-load through the linkage to a predetermined value as selected by a user.

A latch mechanism includes a handle connected to a pin by a linkage. The linkage converts rotation of the handle relative to a frame into axial movement of the pin between extended and retracted positions relative to the frame. The pin engages with a pre-load adjustment mechanism in the extended position to apply a pre-load through the linkage that biases the pin toward the extended position. The pre-load adjustment mechanism is adjustable to set the pre-load through the linkage to a predetermined value as selected by a user.

An alert system configured to monitor a status of one or more supplemental door locks comprises a switch assembly and an alarm. The switch assembly is configured to detect whether one supplemental door lock is unlocked or locked and includes a switch, an indicator, and a communication element. The switch is to be coupled to a locking component of the supplemental door lock. The switch is configured to sense a position of the locking component and generate an electronic signal or data. The indicator is configured to provide a first indication of a status of the supplemental door lock. The communication element is configured to receive the electronic signal or data from the switch and generate a wireless signal that corresponds to the electronic signal or data. The alarm is configured to generate an audible or visible alarm when the switch assembly detects that the supplemental door lock is locked.

A bar lock assembly including a lock rod having first and second lock rod portions and defines a rotational axis. A second lock rod portion section telescopically extends from the first lock rod portion when the bar lock assembly is in a first condition. The second lock rod portion is substantially retracted within the first lock rod portion when the bar lock assembly is in a second condition. An elongated handle having opposed ends extends from the first lock rod portion. One handle end is pivotally connected to the first lock rod about a fixed axis. Linkage between the handle and the second lock rod portion telescopically moves the second lock rod portion. This lock bar assembly is configured such that an angle of about 45° is established between the handle and a generally horizontal plane when in the first position to enhance ergonomic operation of the bar lock assembly.

A privacy door assembly for installation in an aircraft relative to a flight deck door of the aircraft includes a door frame having a first post and a second post, where the second post comprises a latch recess. The privacy door comprises a latch positioned on an edge of the privacy door and arranged to engage the latch recess when the privacy door is in a closed position within the door frame. An access door is positioned in the privacy door, where the access door is rotatable from a closed position to an open position in a forward direction. A first mechanical door handle system including a mechanical combination lock is positioned on an aft side of the privacy door and coupled to the latch, and a second mechanical door handle system is positioned on a forward side of the privacy door and coupled to the latch.

A locking system and method of manufacture can include: a cargo container having a first container door, a second container door, and a container frame base; a lock box affixed to the second container door, the lock box extended into and through the second container door, the lock box including a sliding lock rod configured to extend behind the first container door when the lock box is in a locked configuration; a sliding lock rod guard affixed to an exterior surface of the first container door and affixed to the exterior surface of the second container door; door guards affixed to the second container door and the first container door; and a drop lock affixed to an interior surface of the first container door, the drop lock including a drop lock rod configured to extend down into the container frame base when the drop lock is in a locked configuration.

A locking system and method of manufacture can include: a cargo container having a first container door, a second container door, and a container frame base; a lock box affixed to the second container door, the lock box extended into and through the second container door, the lock box including a sliding lock rod configured to extend behind the first container door when the lock box is in a locked configuration; a sliding lock rod guard affixed to an exterior surface of the first container door and affixed to the exterior surface of the second container door; door guards affixed to the second container door and the first container door; and a drop lock affixed to an interior surface of the first container door, the drop lock including a drop lock rod configured to extend down into the container frame base when the drop lock is in a locked configuration.

A service cover assembly with a locking mechanism is provided. The assembly includes a cover plate with a first and second side, and a through-hole connecting the two sides. A main cylinder with a hollow interior is attached at a first end to the first side of the cover plate and is positioned to align the hollow interior with the through-hole. A pinion gear system is located at a second end of the main cylinder. A plurality of securing rod is provided, each rod positionable in a secured or unsecured position with the pinion gear system. At least one access barrier is disposed within the main cylinder and/or the pinion gear system to restrict access and/or operation of the pinion gear system. One of the at least one access barrier is a lock disposed within the hollow interior of the main cylinder.

A service cover assembly with a locking mechanism is provided. The assembly includes a cover plate with a first and second side, and a through-hole connecting the two sides. A main cylinder with a hollow interior is attached at a first end to the first side of the cover plate and is positioned to align the hollow interior with the through-hole. A pinion gear system is located at a second end of the main cylinder. A plurality of securing rod is provided, each rod positionable in a secured or unsecured position with the pinion gear system. At least one access barrier is disposed within the main cylinder and/or the pinion gear system to restrict access and/or operation of the pinion gear system. One of the at least one access barrier is a lock disposed within the hollow interior of the main cylinder.