2227577

Information

• Patent Grant
• 2227577

• References
• Source

• Patent Number

  2,227,577

• Date Filed

  Not available

• Date Issued

  Tuesday, January 7, 1941
  85 years ago

• CPC

  • H02J9/06 - with automatic change-over
  • H01H50/323 - for interlocking two or more relays
  • H01H2050/325 - Combined electrical and mechanical interlocking
  • H01H2300/018 - Application transfer between utility and emergency power supply
  • Y10T307/615 - Substitute or emergency source

• US Classifications

  • 307 - Electrical transmission or interconnection systems
  • 200 - Electricity: circuit makers and breakers