Jamb-Mounted Barn Door Lockset with Emergency Key Access
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Solution Overview
Problem
Barn doors lack effective locking mechanisms, as existing privacy locks designed for pivoting or pocket doors are not suitable due to the offset alignment of barn doors with the wall plane, necessitating a specialized solution for secure and emergency-accessible locking.
Innovation Solution
A lockset system comprising a lockcase, handling assembly, and strike is mounted to the doorway jamb, allowing the barn door to be locked with a bolt that translates into a cylindrical strike, and includes an emergency key access mechanism for external entry, ensuring secure locking and easy installation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a known privacy lock with handle/knob mounted to the door is used, then the door can be locked, but the lock is not effective because the door is offset from the wall plane and not coplanar with the wall plane
Solution Approach 1:
Instead of mounting the lock to the door as in traditional locks, the patent inverts the approach by mounting the lock to the jamb (fixed structure) and having the door engage with it. The lockcase is mounted within a recess in the face of the jamb, and the bolt translates through the jamb to engage the strike on the door, reversing the traditional mounting configuration to accommodate the barn door's offset alignment.
Solution Approach 2:
The patent introduces a jamb-mounted lockcase as an intermediary element between the door and the wall structure. The lockcase contains the locking mechanism and translates the bolt through the jamb, serving as a mediator that adapts the locking function to the barn door's unique offset configuration where the door is not coplanar with the wall plane.
2Reliability
If a lockset is mounted to the jamb to accommodate barn door offset alignment, then the lock becomes effective for barn doors, but the installation complexity increases
Solution Approach 1:
The lockset is divided into separate components: a lockcase mounted within a recess in the jamb face, a bolt mechanism that translates through the jamb, and a strike mounted on the door. This segmentation allows each component to be optimized for its specific function and simplifies installation by allowing the lockcase to be mounted in the recess without requiring complex structural modifications to the entire assembly.
Solution Approach 2:
The lockcase is mounted within a specific recess in the face of the jamb, concentrating the mounting complexity in a localized area rather than requiring complex structure throughout. The recess provides a predetermined mounting location that simplifies installation by confining the complex locking mechanism to a specific, pre-prepared space in the jamb.
3Shape
If a recessed handle design is used, then the aesthetic appearance is improved and obstruction is minimized, but the ease of operation may be reduced
Solution Approach 1:
The handle is recessed partially into the jamb face rather than being completely flush or protruding. This partial recessing provides a balance between aesthetic appearance (minimizing obstruction and creating a clean exterior finish) and ease of operation (maintaining sufficient accessibility for gripping and turning). The handle extends just enough to be easily operable while remaining mostly recessed for aesthetic purposes.
Data Source
AI summary
A locking system includes a lockcase which can be embedded within a recess in a jamb of a doorway. A barn door mounted outside of the doorway can be locked in the closed position by actuation of a lock mechanism within the lockcase. The handle interacts with the lockcase, causing a bolt to be translated out of the lockcase and into a strike in the barn door. The strike preferably passes entirely through the barn door, the strike including an outer entry which can be accessed via a key to push back the bolt and defeat the lock for emergency access. Cover plates and handles of different types can be provided for optimal performance. Lock mechanisms within the lockcase convert handle actuation into bolt translation between a collapsed orientation and a deployed orientation for locking the barn door.