Vacuum pump

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Left: the original vacuum pump. Center: a 1663 third generation vacuum pump. Right: a semi-modern laboratory size scale version.
In science, vacuum pump (TR:69), as contrasted with an air pump, is a device that is able to withdraw air from an attached bulb (vacuum bulb, or receiver), thus producing a vacuum in the receiver, e.g. via the mechanical cranking of an arm, the down-stroke of each arm working to remove the air from a connecting vessel (top bulb) or vacuum bulb, via the mechanism of a piston and cylinder action with a one-way valve, and thus create a vacuum or region devoid of gas.

History
The first vacuum pump was invented in circa 1650 by German engineer Otto Guericke, as shown adjacent. [1] The third design, supposedly, being more of a portable design, was built in 1663.
The following shows a "second generation" vacuum pump, the one shown constructed in Guericke’s private house in 1664, spanning from the cellar up to his office. [2]

vacuum pump (second generation)

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See also
Engine development timeline
Timeline of thermodynamics

References
1. (a) Wilson, George. (1849). “On the Early History of the Air-Pump in England”, The Edinburgh New Philosophical Journal, (pgs. 330-54).
(b) Galloway, Robert L. (1881). The Steam Engine and its Inventors. London: MacMillan and Co.
2. (a) The First Vacuum Pump – MK-Technology.com.
(b) Otto von Guericke and the Magdeburg Hemispheres – MK-Technology.com.

External links
Vacuum pump – Wikipedia.

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