2: Oval Regulation (Almost no one knows this)
3: Sewing Machines (almost no one knows this, either)
4: Malta Cross movement – used to control the clock (clock mechanism)
5: Auto Change file mechanism (manual transmission)
7: Gun Ammunition loading system (WW1 and II naval cannons and fixed shore emplacements – no longer used)
8: Rotary Engine – an internal combustion engine,
the heat rather than the piston movement into rotary movement
90% of success is showing up. Getting the math right is the other 50%.