3817453

Information

• Patent Grant
• 3817453

• References
• Source

• Patent Number

  3,817,453

• Date Filed

  Not available

• Date Issued

  Tuesday, June 18, 1974
  50 years ago

• CPC

  • G05D23/303 - using a sensing element having a resistance varying with temperature
  • G05D23/1909 - whose output amplitude can only take two discrete values
  • G05D23/1927 - using a plurality of sensors
  • G05D23/24 - the sensing element having a resistance varying with temperature

• US Classifications

  • 236 - Automatic temperature and humidity regulation
  • 219 - Electric heating
  • 361 - Electricity: electrical systems and devices