3821506

Information

• Patent Grant
• 3821506

• References
• Source

• Patent Number

  3,821,506

• Date Filed

  Not available

• Date Issued

  Friday, June 28, 1974
  50 years ago

• CPC

  • H01H33/44 - Devices for ensuring operation of the switch at a predetermined point in the ac cycle
  • H01H33/82 - the fluid being air or gas
  • H01H2009/523 - by using heat pipes

• US Classifications

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