3508834

Information

• Patent Grant
• 3508834

• References
• Source

• Patent Number

  3,508,834

• Date Filed

  Not available

• Date Issued

  Tuesday, April 28, 1970
  54 years ago

• CPC

  • G05D3/20 - using a digital comparing device
  • G01D5/36 - Forming the light into pulses
  • G05B19/231 - the positional error is used to control continuously the servomotor according to its magnitude
  • G05D3/1436 - with fine or coarse devices

• US Classifications

  • 250 - Radiant energy
  • 356 - Optics: measuring and testing