2157834

Information

• Patent Grant
• 2157834

• References
• Source

• Patent Number

  2,157,834

• Date Filed

  Not available

• Date Issued

  Tuesday, May 9, 1939
  85 years ago

• CPC

  • H02P25/186 - whereby the speed is regulated by using a periodic interrupter

• US Classifications

  • 363 - Electric power conversion systems
  • 246 - Railway switches and signals
  • 310 - Electrical generator or motor structure
  • 315 - Electric lamp and discharge devices: systems
  • 322 - Electricity: single generator systems
  • 336 - Inductor devices
  • 388 - Electricity: motor control systems