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
Calibration of quadrature imbalances using wideband signals
Opioid-nornicotine codrugs combinations for pain management
Azole derivatives, methods for producing the same, intermediate thereof, agro-horticultural agents
System and method for multi-threaded OFDM channel equalizer
Simultaneous image distribution and archiving
System and method of detecting and locating intermittent and other faults
Information obtaining and notification, data message forwarding and handover method and access node
  Randomly Featured Patents
Madagascar periwinkle with fringe type flower and method of breeding the same
7-(.alpha.-SUBSTITUTED GLYCINAMIDO)-3-SUBSTITUTED METHYL-3-CEPHEM-4-CARBOXYLIC ACIDS AND THEIR DERIVATIVES
Pipe with storage chamber and method of making same
Electronic bathroom scale
Mole trap
Wire-line controlled down-hole shut-in tool for wells
Micromechanical latching switch
Extraction of embedded watermarks from a host content based on extrapolation techniques
Carpet display rack
Method for printing indicia on porous sheets