@veritas88: Directions for a railroad operator / train conductor? Shouldn't these directions then read something like:- 10 AM: Start the train.- 1 PM: Stop the train. Abusive comment hidden. (Show it anyway.)
It's a precursor to the pneumatic hammer, powered by gunpowder instead of compressed air. The teeth on the locking wheel are there to prevent the hammer "head" from bouncing back and injuring the user. Abusive comment hidden. (Show it anyway.)
- 10 AM: Start the train.
- 1 PM: Stop the train.