Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Thermocouple assembly










Image Number 2 for United States Patent #5071258.

A thermocouple assembly for sensing temperatures of molten metals in a metallurgical vessel, such as a tundish used in continuous steel casting, includes a double bore insulator containing the two noble metal alloy lead wires of the thermocouple. Platinum-rhodium alloys are preferred. The weld bead joining the ends of the leads or hot junction of the thermocouple is positioned within one of the bores of the insulator such that a lower purity alloy lead is exposed in the loop. The loop resides in a blind bore formed in the end of the double bore insulator and is enclosed in a containmemt zone by a refractory plug or foil disc closing off the end of the blind bore. The double bore insulator is received in an axial bore of a refractory sheath having a closed end adjacent the loop area of the thermocouple. The bores of the double bore insulator and refractory sheath communicate with the atmosphere to permit oxygen to diffuse therealong to the loop area to protect the platinum alloy from reaction with carbon and silica which may be present in trace amounts. A closed end molybdenum sheath having an axial bore receives the refractory sheath therein. High purity alumina powder is preferably packed around an upper annular space between the bore of the molybdenum sheath and the refractory sheath to prevent diffusion of atmospheric oxygen within the molybdenum bore and thereby minimize the formation of gaseous molybdenum oxide at molten steel temperatures.








 
 
  Recently Added Patents
Peptides useful in the treatment and/or care of skin, mucous membranes, scalp and/or hair and their use in cosmetic or pharmaceutical compositions
High surface area composition for use in the catalytic hydroconversion of a heavy hydrocarbon feedstock, a method making such composition and its use
Digital-to-analog converter and performing method thereof
Pre-colored methodology of multiple patterning
Method for inhibiting thermal run-away
Demand based power allocation
Spacers for insulated glass units
  Randomly Featured Patents
Rare earth aluminoborosilicate glass composition
Wireless selective call receiver
Modular cooking oven and related methods
Apparatus for selective random printing of fixed data
Anhydrous blends of p-chloro-m-xylenol in surfactant mixtures
Torque-transmitting connecting arrangement
Microelectronic packages and methods therefor
Television set
Phase change memory apparatus and fabrication method thereof
Information processing apparatus, control method, and computer-readable medium