3422312

Information

• Patent Grant
• 3422312

• References
• Source

• Patent Number

  3,422,312

• Date Filed

  Not available

• Date Issued

  Tuesday, January 14, 1969
  56 years ago

• CPC

  • H03L7/18 - using a frequency divider or counter in the loop
  • B65G51/24 - Switches
  • H02P5/50 - by comparing electrical values representing the speeds
  • H03L7/183 - a time difference being used for locking the loop, the counter counting between fixed numbers or the frequency divider dividing by a fixed number

• US Classifications

  • 361 - Electricity: electrical systems and devices
  • 324 - Electricity: measuring and testing
  • 363 - Electric power conversion systems