Method of and apparatus for operating a diffusion pump

Details Method of and apparatus for operating a diffusion pump Method of and apparatus for operating a diffusion pump

1984-05-07

1986-01-28

Look, Edward K.

Pumps

Processes

Of pumping one fluid by contact or entrainment with another

236 78D, 417154, F04F 900

Patent

active

045668612

ABSTRACT:
A diffusion pump is operated by controlling the rate at which vapor is evaporated from a pool in response to an indication of the effectiveness of a fluid in cooling a condensation surface for the vapor as derived by sensors for the temperatures of the pool and along a temperature gradient from the pool to a cooling coil for the condensation surface. When the sensors indicate that the vapor is not effectively cooling the surface, liquid is vaporized from the pool, but at a slower rate than when the fluid is effective in cooling the surface. To increase the life of a brass strap on the temperature gradient, opposite ends of the strap are connected to a cooling coil for the condensation surface and a stainless steel block connected to a well in which is located an electric heater for vaporizing the oil from the pool.

REFERENCES:
patent: 3282330 (1966-11-01), Landfors
patent: 4108576 (1978-08-01), Landfors
patent: 4210823 (1980-07-01), Kabat et al.

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