3390239

Information

• Patent Grant
• 3390239

• References
• Source

• Patent Number

  3,390,239

• Date Filed

  Not available

• Date Issued

  Tuesday, June 25, 1968
  56 years ago

• CPC

  • H01H33/168 - the impedance being inserted both while closing and while opening the switch
  • H01H33/52 - for interlocking two or more switches

• US Classifications

  • 218 - High-voltage switches with arc preventing or extinguishing devices