3397309

Information

• Patent Grant
• 3397309

• References
• Source

• Patent Number

  3,397,309

• Date Filed

  Not available

• Date Issued

  Tuesday, August 13, 1968
  56 years ago

• CPC

  • G01P3/54 - by measuring frequency of generated current or voltage
  • B66C13/30 - Circuits for braking, traversing, or slewing motors
  • B66C2700/082 - Control of the secondary movements

• US Classifications

  • 246 - Railway switches and signals