3870845

Information

• Patent Grant
• 3870845

• References
• Source

• Patent Number

  3,870,845

• Date Filed

  Not available

• Date Issued

  Tuesday, March 11, 1975
  49 years ago

• CPC

  • H01H33/66261 - Specific screen details
  • H01H33/664 - Contacts Arc-extinguishing means
  • H01H33/022 - particular to three-phase circuit breakers
  • H01H33/6645 - in which the coil like electrical connections encircle at least once the contact rod
  • H01H2033/024 - with a triangular setup of circuit breakers
  • H01H2033/66269 - Details relating to the materials used for screens in vacuum switches
  • H01H2033/6668 - with a plurality of interruptible circuit paths in single vacuum chamber

• US Classifications

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