3474228

Information

• Patent Grant
• 3474228

• References
• Source

• Patent Number

  3,474,228

• Date Filed

  Not available

• Date Issued

  Tuesday, October 21, 1969
  55 years ago

• CPC

  • H02M1/081 - wherein the phase of the control voltage is adjustable with reference to the AC source
  • G05B11/016 - using inductance means
  • G05D23/1909 - whose output amplitude can only take two discrete values
  • G05D23/24 - the sensing element having a resistance varying with temperature

• US Classifications

  • 219 - Electric heating