mechanism articles
Who invented the first coin operated machine?
How did Theodore Maiman invent the laser?
Who invented the pinwheel calculator?
Who invented the punch card and when?
Who invented gears on a bike?
When did bike gears come out?
Where did the gyroscope come from?
What is the oldest type of engine?
Who invented the quick release?
Who invented the lock mechanism?
Who invented indexed shifting?
Why are ballpoint pens better?
How did Alexander Graham Bell's invention work?
Where were springs invented?
Who invented the chain drive?
When was the modern door lock invented?
Who invented modern cruise control?
What is the origin of the lock and key?
When was the first lock system invented?
