3389330

Information

• Patent Grant
• 3389330

• References
• Source

• Patent Number

  3,389,330

• Date Filed

  Not available

• Date Issued

  Tuesday, June 18, 1968
  56 years ago

• CPC

  • H03F9/02 - current-controlled
  • B61L5/1881 - Wiring diagrams for power supply, control or testing
  • B61L29/18 - Operation by approaching rail vehicle or rail vehicle train
  • B61L29/288 - Wiring diagram of the signal control circuits
  • H01F29/14 - with variable magnetic bias
  • H03K17/80 - using non-linear magnetic devices using non-linear dielectric devices
  • H01F2029/143 - with control winding for generating magnetic bias

• US Classifications

  • 323 - Electricity: power supply or regulation systems
  • 049 - Movable or removable closures
  • 246 - Railway switches and signals
  • 318 - Electricity: motive power systems