2321812

Information

• Patent Grant
• 2321812

• References
• Source

• Patent Number

  2,321,812

• Date Filed

  Not available

• Date Issued

  Tuesday, June 15, 1943
  81 years ago

• CPC

  • G11B15/662 - Positioning or locking of spool or reel
  • G11B5/4969 - Details for track selection or addressing
  • G11B15/32 - through the reels or cores on to which the record carrier is wound
  • G11B15/448 - automatic reverse drive transfer therefor
  • G11B15/46 - Controlling, regulating, or indicating speed
  • G11B15/50 - by mechanical linkage
  • G11B15/54 - by stroboscope by tachometer

• US Classifications

  • 242 - Winding, tensioning, or guiding
  • G9B - INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER