2840771

Information

• Patent Grant
• 2840771

• References
• Source

• Patent Number

  2,840,771

• Date Filed

  Not available

• Date Issued

  Tuesday, June 24, 1958
  66 years ago

• CPC

  • H03M1/00 - Analogue/digital conversion Digital/analogue conversion
  • B23Q17/00 - Arrangements for observing, indicating or measuring on machine tools
  • G05B19/351 - the positional error is used to control continuously the servomotor according to its magnitude
  • G05D3/1436 - with fine or coarse devices
  • B23Q2717/003 - in lathes
  • G05B2219/33268 - D-A, A-D
  • G05B2219/37462 - Resistor, potentiometers
  • G05B2219/41081 - Approach position from same direction
  • G05B2219/41105 - Coarse fine
  • H03M2201/01 - First edition
  • H03M2201/16 - Coarse and fine conversions
  • H03M2201/194 - Control systems
  • H03M2201/3115 - Simultaneous addition or subtraction of selected values
  • H03M2201/3131 - Direct selection from all possible values
  • H03M2201/3168 - Resistors
  • H03M2201/4125 - representing angular position
  • H03M2201/4135 - Momentary value
  • H03M2201/4225 - Parallel
  • H03M2201/4233 - Bivalued
  • H03M2201/4266 - Decimal radix
  • H03M2201/4279 - Pure
  • H03M2201/518 - with analogue feedback
  • H03M2201/52 - Digital conversions
  • H03M2201/522 - Non-denominational/denominational Pure/combination code
  • H03M2201/844 - Servomotors
  • H03M2201/847 - Switches
  • H03M2201/848 - Relays
  • H03M2201/853 - Reduction gearings
  • H03M2201/856 - Shaft couplings
  • H03M2201/93 - Constructional details
  • Y10T409/300896 - with sensing of numerical information and regulation without mechanical connection between sensing means and regulated means [i.e., numerical control]

• US Classifications

  • 318 - Electricity: motive power systems
  • 341 - Coded data generation or conversion
  • 409 - Gear cutting, milling, or planing