3673422

Information

• Patent Grant
• 3673422

• References
• Source

• Patent Number

  3,673,422

• Date Filed

  Not available

• Date Issued

  Tuesday, June 27, 1972
  52 years ago

• CPC

  • H02P5/50 - by comparing electrical values representing the speeds
  • H02H3/48 - responsive to loss of synchronism
  • H02H7/0805 - for synchronous motors
  • Y10T307/735 - Attainment of voltage, frequency or phase relationship

• US Classifications

  • 307 - Electrical transmission or interconnection systems
  • 318 - Electricity: motive power systems