Historical clue formulations

• Mechanical catch — 2024-06-23
• Trigger-to-cylinder connection — 2018-01-27
• Ratcheting wheel mechanism — 2017-10-01
• Machine part connecting to a gearwheel — 2013-02-02
• Ratchet bar — 2011-11-06
• Bar locking a capstan in place — 2002-12-15