3809956

Information

• Patent Grant
• 3809956

• References
• Source

• Patent Number

  3,809,956

• Date Filed

  Not available

• Date Issued

  Tuesday, May 7, 1974
  50 years ago

• CPC

  • G01P3/60 - by measuring or comparing frequency of generated currents or voltages
  • F16D48/064 - Control of electrically or electromagnetically actuated clutches
  • F16D2500/1022 - Electromagnet
  • F16D2500/30417 - Speed change rate of the input shaft
  • F16D2500/30428 - Speed change rate of the output shaft
  • F16D2500/50239 - Soft clutch engagement
  • F16D2500/50638 - Shaft speed synchronising
  • F16D2500/7042 - Voltage
  • F16D2500/7109 - Pulsed signal Generating or processing pulsed signals PWM, width modulation, frequency or amplitude modulation

• US Classifications

  • 361 - Electricity: electrical systems and devices
  • 188 - Brakes
  • 192 - Clutches and power-stop control
  • 303 - Fluid-pressure and analogous brake systems
  • 324 - Electricity: measuring and testing