3581084

Information

• Patent Grant
• 3581084

• References
• Source

• Patent Number

  3,581,084

• Date Filed

  Not available

• Date Issued

  Tuesday, May 25, 1971
  53 years ago

• CPC

  • B61L1/164 - Mechanical
  • B61L1/025 - actuated by variation of resistance or by piezo-electricity
  • B61L25/021 - Measuring and recording of train speed

• US Classifications

  • 246 - Railway switches and signals
  • 310 - Electrical generator or motor structure
  • 324 - Electricity: measuring and testing