Measuring and testing – Liquid level or depth gauge – Float
Patent
1994-06-03
1996-11-26
Cuchlinski, Jr., William A.
Measuring and testing
Liquid level or depth gauge
Float
73319, 733225, G01F 2360, G01F 2376, B22D 1118
Patent
active
055774113
ABSTRACT:
A method and apparatus for casting molten metal in an opaque container and for determining the level of the metal within the container. This is accomplished by locating a strain sensing transducer over the container and metal, and sending a current pulse from the transducer along a wire located in the tube connected to the transducer and extending toward the vessel and molten metal. A permanent magnet is located on a stem connected to a float within the container, the float being effective to rest and float on the upper level of the molten metal within the container. A current pulse is sent along the wire from the transducer, which pulse produces a magnetic field, and which field interacts with a magnetic field of the permanent magnet. The interaction of the two fields exerts a strain on the tube, which strain is sensed by the transducer. The transducer also notes the time at which the current pulse is sent along the wire and produces and output signal indicative the time elapsed between the sending of the current pulse and the sensing of the strain on the tube. The elapsed time being proportional to the level of molten metal within the opaque container.
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Abate Mark B.
Keenan Robert H.
Kruzynski Gregg E.
Kruzynski Mark T.
Aluminum Company of America
Cuchlinski Jr. William A.
Strickland Elroy
Worth Willie Morris
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