Screws!
Saturday, January 21, 2006
There are many screws in the world. The concept was invented by Archimedes in the 3rd century B.C. when he invented the screw drive inside a pipe used for raising water. The name, 'screw', has been given to any cylinder that has spiral, helical threads running up the shaft. Because screws were invented so long ago, they have had many years to mutate. For centuries, screws were all hand made and extremely expensive. It wasn't until the industrial revolution that machinists were able to devise tools precise and strong enough to cut accurate, measurable threads consistently, allowing for mass production.more about screws and your home...
