3874223

Information

• Patent Grant
• 3874223

• References
• Source

• Patent Number

  3,874,223

• Date Filed

  Not available

• Date Issued

  Tuesday, April 1, 1975
  49 years ago

• CPC

  • H01H36/0006 - Permanent magnet actuating reed switches
  • G01F23/223 - using a melting or dissolving material as a part of alarm-means
  • G01M3/045 - with electrical detection means
  • G01N9/00 - Investigating density or specific gravity of materials Analysing materials by determining density or specific gravity
  • H01H35/42 - Switches operated by change of humidity

• US Classifications

  • 073 - Measuring and testing
  • 200 - Electricity: circuit makers and breakers
  • 340 - Communications: electrical