Head Arrangements Not Specific To The Method Of Recording Or Reproducing {g11b 21/00} Patents (Class G9B/21)
Cross-Reference Art Collections
- [N: Programmed access in sequence to indexed parts of operating record carriers] {G11B 21/02A} (Class G9B/21.004)
- for correcting time base error [N: during transducing operation, by driving or moving the head in a direction more or less parallel to the direction of travel of the recording medium, e.g. tangential direction on a rotating disc (by driving or moving the head in a direction which cuts across the direction of travel of the recording medium G9B/15.022, G9B/15.055, G9B/19.027B2)] {G11B 21/03} (Class G9B/21.007)
- Automatic feed mechanism producing a [N: progressive] transducing traverse of the head in a direction which cuts across the direction of travel of the recording medium, e.g. helical scan, [N: e.g. by lead-screw (G9B/19.027B, G9B/21.012 and G9B/21.018 take precedence)] {G11B 21/04} (Class G9B/21.008)
- Track changing or selecting (G9B/21.021 takes precedence) [N: during transducing operation] {G11B 21/08} (Class G9B/21.012)
- Track finding or aligning by moving the head [N: Provisions for maintaining alignment of the head relative to the track during transducing operation, i.e. track following (characterised by the track access method G9B/21.012)] {G11B 21/10} (Class G9B/21.018)
- Raising and lowering; Back-spacing or forward-spacing along track; Returning to starting position [N: otherwise than during transducing operation] {G11B 21/12} (Class G9B/21.021)
- while the head is moving {G11B 21/18} (Class G9B/21.024)
- while the head is in operative position but stationary or permitting minor movements to follow irregularities in surface of record carrier {G11B 21/20} (Class G9B/21.025)
- while the head is out of operative position {G11B 21/22} (Class G9B/21.027)
- Head support adjustments {G11B 21/24} (Class G9B/21.028)
- Means for interchange or replacement of head or head element {G11B 21/26} (Class G9B/21.029)
