3493664

Information

• Patent Grant
• 3493664

• References
• Source

• Patent Number

  3,493,664

• Date Filed

  Not available

• Date Issued

  Tuesday, February 3, 1970
  54 years ago

• CPC

  • H01F29/04 - having provision for tap-changing without interrupting the load current
  • H05B7/152 - by electromechanical means for positioning of electrodes
  • Y02P10/256 - Design or operational measures for increasing the efficiency of electric conversion
  • Y02P10/259 - in electric arc furnaces

• US Classifications

  • 373 - Industrial electric heating furnaces