1428821

Information

• Patent Grant
• 1428821

• References
• Source

• Patent Number

  1,428,821

• Date Filed

  Not available

• Date Issued

  Tuesday, September 12, 1922
  102 years ago

• CPC

  • H01H71/50 - Manual reset mechanisms which may be also used for manual release
  • H01H3/0253 - two co-operating contacts actuated independently
  • H01H3/3026 - in which the closing spring charges the opening spring or vice versa
  • H01H9/42 - Impedances connected with contacts
  • H01H71/505 - Latching devices between operating and release mechanism
  • H01H2003/3084 - Kinetic energy of moving parts recuperated by transformation into potential energy in closing or opening spring to be used in next operation

• US Classifications

  • 335 - Electricity: magnetically operated switches, magnets, and electromagnets