Accession Number : ADD000966
Title : Detecting Helium Liquid Level.
Descriptive Note : Patent,
Corporate Author : DEPARTMENT OF THE ARMY WASHINGTON D C
Personal Author(s) : Milo,William C
Report Date : 28 Aug 1973
Pagination or Media Count : 4
Abstract : The patent relates to a constant current fed through a pair of silicon diodes whose voltage varies with the heat sinking capability of its surrounding. These diodes are positioned at the top level of the liquid helium and the voltage across the diodes are compared by two comparators. One comparator lights a signal light whenever one or more diode is in the liquid helium, and the other comparator lights the signal light only when both diodes are in the liquid.
Descriptors : *Liquid helium, *Liquid level gages, *Patents, Liquefied gases, Helium, Semiconductor diodes, Voltage, Cryogenics
Subject Categories : Test Facilities, Equipment and Methods
Distribution Statement : APPROVED FOR PUBLIC RELEASE