Accession Number : ADD005764

Title :   Liquid Nitrogen Level Controller.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE AIR FORCE WASHINGTON D C

Personal Author(s) : Sears,Daniel

Report Date : 23 Jan 1979

Pagination or Media Count : 7

Abstract : The liquid nitrogen level in a flask is controlled by the degree of immersion of two sensing coils of copper wire in the liquid nitrogen activating a solid state switching circuit which controls a liquid nitrogen inlet flow valve. Manual override and sensor fault indication is provided. (Author)

Descriptors :   *Patents, *Liquid level control, *Liquid nitrogen, *Switching circuits, Dewar flasks, Fluid flow, Flow rate, Intake valves, Light emitting diodes, Electric coils, Nand gates

Subject Categories : Physical Chemistry
      Electrooptical and Optoelectronic Devices

Distribution Statement : APPROVED FOR PUBLIC RELEASE