3338680

Information

• Patent Grant
• 3338680

• References
• Source

• Patent Number

  3,338,680

• Date Filed

  Not available

• Date Issued

  Tuesday, August 29, 1967
  57 years ago

• CPC

  • H01H43/308 - based on the change of electrical properties
  • G05D23/1906 - using an analogue comparing device
  • G05D23/1928 - sensing the temperature of one space
  • G05D23/1951 - with control of the working time of a temperature controlling device
  • G05D23/24 - the sensing element having a resistance varying with temperature

• US Classifications

  • 422 - Chemical apparatus and process disinfecting, deodorizing, preserving, or sterilizing
  • 219 - Electric heating
  • 236 - Automatic temperature and humidity regulation
  • 331 - Oscillators
  • 432 - Heating