1768939

Information

• Patent Grant
• 1768939

• References
• Source

• Patent Number

  1,768,939

• Date Filed

  Not available

• Date Issued

  Tuesday, July 1, 1930
  94 years ago

• CPC

  • B65H23/198 - motor-controlled (Controlling electrical drive motors therefor)
  • B65H23/1806 - in reel-to-reel type web winding and unwinding mechanism
  • B65H23/1813 - acting on web-roll
  • H02P5/68 - controlling two or more dc dynamo-electric motors

• US Classifications

  • 242 - Winding, tensioning, or guiding
  • 310 - Electrical generator or motor structure
  • 318 - Electricity: motive power systems