3421059

Information

• Patent Grant
• 3421059

• References
• Source

• Patent Number

  3,421,059

• Date Filed

  Not available

• Date Issued

  Tuesday, January 7, 1969
  56 years ago

• CPC

  • H02P7/2855 - whereby the speed is regulated by measuring the motor speed and comparing it with a given physical value
  • G05B1/02 - for comparing analogue signals
  • G05D7/0635 - by action on throttling means
  • G05D9/12 - characterised by the use of electric means
  • G05D23/27541 - using expansible solid

• US Classifications

  • 318 - Electricity: motive power systems
  • 324 - Electricity: measuring and testing