Index of content:
Volume 3, Issue 9, September 1932
3(1932); http://dx.doi.org/10.1063/1.1748963View Description Hide Description
3(1932); http://dx.doi.org/10.1063/1.1748964View Description Hide Description
A new type of vacuum or circulating pump employing a helical tube made to rotate about the axis of the helix is described. Its action depends on a pumping liquid which fills the lower bends of the helix and crowds out the gas being pumped as the helix is rotated. There is a provision for the return of the pumping liquid to the first coil of the helix as the latter continues to rotate. The liquid may be chosen to suit the work at hand. Among the advantages claimed for the pump are the following: mercury vapour is not employed, heating and cooling elements are not required, adapted equally well to corrosive and noncorrosive gases, vapors and liquids, constant personal attention is not needed, it may be started or stopped instantly without the use of stop cocks, and its action is reversible.
3(1932); http://dx.doi.org/10.1063/1.1748968View Description Hide Description
3(1932); http://dx.doi.org/10.1063/1.1748970View Description Hide Description