1820808

Information

• Patent Grant
• 1820808

• References
• Source

• Patent Number

  1,820,808

• Date Filed

  Not available

• Date Issued

  Tuesday, August 25, 1931
  94 years ago

• CPC

  • H01H43/121 - using a drum
  • H01H7/16 - Devices for ensuring operation of the switch at a predetermined point in the ac cycle
  • H01H43/12 - stopping automatically after a single cycle of operation
  • Y10T307/74 - Switching systems

• US Classifications

  • 335 - Electricity: magnetically operated switches, magnets, and electromagnets
  • 200 - Electricity: circuit makers and breakers
  • 307 - Electrical transmission or interconnection systems
  • 361 - Electricity: electrical systems and devices
  • 378 - X-ray or gamma ray systems or devices