2230731

Information

• Patent Grant
• 2230731

• References
• Source

• Patent Number

  2,230,731

• Date Filed

  Not available

• Date Issued

  Tuesday, February 4, 1941
  84 years ago

• CPC

  • H02P25/325 - whereby the speed is regulated by measuring the motor speed and comparing it with a given physical value
  • H02P25/32 - using discharge tubes

• US Classifications

  • 318 - Electricity: motive power systems
  • 315 - Electric lamp and discharge devices: systems
  • 363 - Electric power conversion systems