1947884

Information

• Patent Grant
• 1947884

• References
• Source

• Patent Number

  1,947,884

• Date Filed

  Not available

• Date Issued

  Tuesday, February 20, 1934
  90 years ago

• CPC

  • G05D16/0677 - using one membrane without spring
  • G05D16/0655 - using one spring-loaded membrane
  • G05D23/1921 - using a thermal motor
  • G05D23/275 - with sensing element expanding, contracting, or fusing in response to changes of temperature

• US Classifications

  • 236 - Automatic temperature and humidity regulation