487904

Information

• Patent Grant
• 487904

• References
• Source

• Patent Number

  487,904

• Date Filed

  Not available

• Date Issued

  Tuesday, December 13, 1892
  132 years ago

• CPC

  • B61L1/06 - actuated by deformation of rail actuated by vibration in rail
  • Y10S200/35 - Weight operated tread/treadless switch

• US Classifications

  • 246 - Railway switches and signals
  • 200 - Electricity: circuit makers and breakers