The history of water pumping -- part 2: the force pump marks a major advancement in technology.

From: National Driller | Date: March 1, 2004| Author: | Copyright information

The Greek inventor Ctesibius began his adult life as a barber but that career got pushed aside quickly as his fascination with mechanics began to consume him. One of his earliest inventions was a counter-weighted mirror that could be adjusted to accommodate the differing heights of his customers. He housed the lead weight inside a tube, and when the weight ran down in the tube, he noticed the whistling sound made as air was forced out the end.

**********

At about the same time, he pushed a bucket upside-down into water and when he pulled the bucket out, he noticed that it ...

Read all of this article with a FREE trial to HighBeam Research

Related newspaper, magazine, and trade journal articles from HighBeam Research

(Including press releases, facts, information, and biographies)

Tire air pressure top safety concern.(News)
; Byline: Jim Johnson Crain News Service Air pressure. For trash trucks, there are few words...it safely from one stop to the next. Air pressure is first on the list. Everything else...company takes great pains to keep track of air pressure as a way to extend the life of those...
Now that's pressure to perform; Waste fleets point to air pressure as top safety priority.(Trash Truck Tires Maintenance)
; Byline: Jim Johnson Air pressure. For trash trucks, there are few...safely from one stop to the next. Air pressure is first on the list. Everything...takes great pains to keep track of air pressure as a way to extend the life of...
Harnessing Air Pressure: Elegant Technology That Sucks
; ...power of a simple device to harness air pressure was recognized at least as long...force holding them in place was air pressure, a considerable power, as the experiment showed. At sea level, air pressure exerts a force of 14.7 pounds on...
Jet turned back after air pressure problem
; Caption only.
When winds blow, does the earth quake? (link between air pressure and earth quakes)
; ...blow, does the earth quake? Unusual air pressure patterns off the coast of California...in advance by persistent patterns of air pressure several hundred miles off the coast...to the possibility that patterns of air pressure may have some effect, he says. Namias...
Inventors 'R' us: John introduces a new positive air pressure attenuator to the American engineering community. (Though from Abroad).(Column)
; ...disciplines. The attenuation of positive air pressure transients is one such area. The prevention...system design and usage will not generate air pressure transients of sufficient magnitude to...depletion. Trap Seal Loss from Positive Air Pressure Transients Trap seal loss may be ...
Variations in Air Pressure Tied to Wobble in Earth's Poles
; Differences in air pressure at various points above the Earth...link them to recorded changes in air pressure over the globe. Because the air...America got heavier. The effects of air pressure over water are less clear, the scientists...
SCIENTISTS: AIR PRESSURE MAY PLAY ROLE IN QUAKES.(News/National/International)
; ...possibly because of seasonal changes in air pressure, scientists suggest. The surprising...in atmospheric pressure. In the West, air pressure tends to be lowest during the summer...annual atmospheric high. In the West, air pressure tends to be highest during cold weather...
Operating Air Pressure of Disposable Angles.(Statistical Data Included)
; ...typically have meters that indicate air pressure in pounds per square inch (psi), as...and manufacturers recommend using an air pressure of 20 psi or less for routine coronal...have been reported to verify that this air pressure is sufficient for the smooth operation...
EXTREMES IN AIR PRESSURE MEAN A CHANGE IN WEATHER
; ...many inquiries about barometers and air pressure and their relationship to our weather...sea-level pressure for our planet. The air pressure at sea level is 14.7 pounds per square...inches or 29 inches. Differences in air pressure can really affect some individuals who...