3870931

Information

• Patent Grant
• 3870931

• References
• Source

• Patent Number

  3,870,931

• Date Filed

  Not available

• Date Issued

  Tuesday, March 11, 1975
  49 years ago

• CPC

  • G05D3/1409 - with dc amplifier chain
  • H01F7/145 - Rotary electromagnets with variable gap
  • H01F7/1607 - Armatures entering the winding
  • H01F7/1844 - Monitoring or fail-safe circuits
  • H01F2007/1684 - Armature position measurement using coils

• US Classifications

  • 361 - Electricity: electrical systems and devices
  • 318 - Electricity: motive power systems
  • 335 - Electricity: magnetically operated switches, magnets, and electromagnets