Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Magnetic tape tracking control apparatus










Image Number 7 for United States Patent #4587581.

Tracking control apparatus for a magnetic storage device is provided for playback of information recorded on tracks at alternating azimuth angles which correspond to mutually different azimuth angles of a pair of magnetic playback heads. The playback heads have track-wise widths which are less than the width of their associated record tracks, to prevent the attenuation of their playback signals resulting from limited playback head tracking error. A tracking control head, which has an azimuth angle of one of the playback heads, is mounted for selectively overlapping adjacent record tracks in accordance with the magnitude and direction of the tracking error of the playback heads. Signal comparison circuitry produces a tracking error signal in accordance with the difference between the output of the control head and the output of a playback head. When the storage device is magnetic tape having information recorded on slant tracks, a tape drive servomechanism, responsive to the error signal, momentarily adjusts the speed of the tape, to align the playback heads with respect to their associated record tracks.








 
 
  Recently Added Patents
Registration of emission tomography and computed tomography
Pharmaceutical compositions of adsorbates of amorphous drug
Handheld modular digital photography system
Enhanced quality-sorting scheduler
Microphone
Immersion lithographic apparatus and method for rinsing immersion space before exposure
Digital to analog converter
  Randomly Featured Patents
Sulfonated metal phthalocyanine catalyst
Polling-type digital communications system having pseudo-balanced mode
Wheel-mounted air compressor and methods of use
Nonvolatile semiconductor memory with controlled supply of boosted voltage
Charge control circuit and battery charger including a charge control circuit
Rotary dressing roller and method and apparatus for dressing cup-shaped grinding wheels
Air conditioning system with integral energy conserving elements
Control for fluid coupling
Weather severity and characterization system
Automatic feed system for ultrasonic machining