3209212

Information

• Patent Grant
• 3209212

• References
• Source

• Patent Number

  3,209,212

• Date Filed

  Not available

• Date Issued

  Tuesday, September 28, 1965
  59 years ago

• CPC

  • H02H3/46 - responsive to frequency deviations
  • G01R23/02 - Arrangements for measuring frequency
  • H01H47/20 - for producing frequency-selective operation of the relay
  • H01H51/32 - Frequency relays Mechanically-tuned relays

• US Classifications

  • 361 - Electricity: electrical systems and devices
  • 324 - Electricity: measuring and testing
  • 327 - Miscellaneous active electrical nonlinear devices, circuits, and systems