2120787

Information

• Patent Grant
• 2120787

• References
• Source

• Patent Number

  2,120,787

• Date Filed

  Not available

• Date Issued

  Tuesday, June 14, 1938
  86 years ago

• CPC

  • H03F1/546 - Delaying application of anode power supply with respect to application of filament heating power supply
  • Y10T307/951 - With time delay or retardation means

• US Classifications

  • 307 - Electrical transmission or interconnection systems
  • 200 - Electricity: circuit makers and breakers
  • 315 - Electric lamp and discharge devices: systems
  • 361 - Electricity: electrical systems and devices