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
Reducing voltage stress in a flyback converter design
Inhibition of HRP-3 using modified oligonucleotides
Converter and measuring apparatus
Systems and methods for controlling registration of advancing substrates in absorbent article converting lines
Electric separator, method for the production and use thereof
Satellite mounting pole
Device, information processing method, and computer-readable storage medium
  Randomly Featured Patents
Twist drills
Backing layer for motion picture film
Methods and compositions for diagnosis and prognosis of renal artery stenosis
Acrylate superabsorbent polymerization process
Magnetic recording medium
Apparatus and methods of extending application services
Electric actuator
Gearbox with incorporated clutch for self-propelled machines
Image forming apparatus
Techniques to associate media information with related information