Saturday, July 31, 2010

No-SQL Saturday: Gears

Saturdays are time to take a break from databases and look at other things that amuse me.

This week: non-circular gears.

This guy supposedly hand-makes these things out of paper:

There's a great series of videos on old Navy analog computers, which are basically complex gear systems: part 1, 2, 3, 4, 5, 6, 7.

This is probably the best explanation I've ever seen of how differential gears work:

And of course, no discussion of differentials would be complete without mention of the South-pointing Chariot, rumored to have been invented by the Chinese over 4500 years ago. South-facing chariots use a series of gears to keep a figure pointing south no matter which way the wagon turns. These days geeks can't resist building their own out of legos or whatnot, and in looking for links I came across a kit you can buy for $59 and I think I might just have to.

Lastly, here's some random gear-related links:

Animated Engines
The Kentucky Do-Nothing Machine
The German Do-Nothing Machine
The Eames (yes, that Eames) Do-Nothing Machine

A wooden orrery!

No comments:

Post a Comment