Magnetic recording

• US 2,959,636 A
• Filed: 11/04/1955
• Issued: 11/08/1960
• Est. Priority Date: 11/04/1955
• Status: Expired due to Term

• Current Assignee: Jerome H. Lemelson
• Original Assignee: Jerome H. Lemelson
• Inventors: Lemelson, Jerome H.
• Application Number:
  US03/544,991
• Time in Patent Office: 1,831 Days
• US Class Current: 360/231
• CPC Class Codes: B07C 3/18 Devices or arrangements for indicating destination, e.g. by code marks applying data to information carriers G06K1/12
• CPC Class Codes: G06K 17/00 Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations
• CPC Class Codes: G06K 7/084 sensing magnetic material by relative movement detecting flux changes without altering its magnetised state
• CPC Class Codes: G07C 9/257 electronically G07C9/26 takes precedence
• CPC Class Codes: G11B 15/28 through rollers driving by frictional contact with the record carrier, e.g. capstan; Multiple arrangements of capstans or drums coupled to means for controlling the speed of the drive; Multiple capstan systems alternately engageable with record carrier to provide reversal
• CPC Class Codes: G11B 2220/41 Flat as opposed to hierarchical combination, e.g. library of tapes or discs, CD changer, or groups of record carriers that together store one title
• CPC Class Codes: G11B 2220/90 Tape-like record carriers
• CPC Class Codes: G11B 5/60 Fluid-dynamic spacing of heads from record-carriers

Claims