Drop-in immersion probe

Details Drop-in immersion probe Drop-in immersion probe

1995-02-24

1996-12-17

Cuchlinski, Jr., William A.

Thermal measuring and testing

Temperature measurement

Of molten metal

374208, 136234, G01K 112

Patent

active

055845789

ABSTRACT:
A drop-in immersion probe for inserting into molten metal includes a generally cylindrical measurement head having an axis and a first axial end which is inwardly tapered toward the axis. The measurement head is made of a combination of materials having a combined density greater than the density of the molten metal. A sensor element extends outwardly from the first axial end of the measurement head proximate the axis and a slag cap covers the first end of the measurement head and the sensor element. A leadwire extends outwardly from the measurement head and has one end electrically connected to the sensor element. A portion of the leadwire extending outwardly from the measurement head is preferably covered by a protective sleeve of heat resistant material. In a preferred embodiment, the slag cap and the measurement head are covered with an ablative material to prevent the adherence of slag. Also in a preferred embodiment, the leadwire and protective sleeve are spirally wound upon a leadwire support tube contacting the second axial end of the measurement head.

REFERENCES:
patent: 3374122 (1968-03-01), Cole
patent: 3501957 (1970-03-01), Jones, Jr.
patent: 3756082 (1973-09-01), Bardenheuer et al.
patent: 3791209 (1974-02-01), Norburn
patent: 4358630 (1982-11-01), Falk
patent: 4699014 (1987-10-01), Boron
patent: 4721534 (1988-01-01), Phillippi et al.
patent: 4881824 (1989-11-01), Falk et al.
patent: 5198749 (1993-03-01), Guthrie et al.
patent: 5275488 (1994-01-01), Stelts

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