A magnetic disk drive has a drive motor mounted on a yoke which rotatable about a pivot in the drive. A bezel member mounted on the end of the yoke normally closes the opening the disk drive through which a cartridge is inserted. As this bezel member is moved out of the cartridge, the motor is moved out of the position in which it engages the disk and when the bezel member is closed, the motor moves into the engagement position. The motor is mounted on the yoke with a movable connection so that ...

A magnetic head utilizing the magneto-resistive effect with at least two magneto-resistive elements present in one plane at right angles to the recording medium. The elements are connected to an output circuit in which their signals are subtracted from each other. In this manner compensation is provided for both interference signals and crosstalk signals. The head may comprise a reading element and a compensation element arranged above it or a reading element flanked by two compensation elements...

A tape cartridge player includes a plurality of receptacles adapted to receive a plurality of cartridges of the endless loop variety wherein magnetic tape within the cartridge is passed around a pressure roller and across a plurality of openings at its forward end. The cartridges are of the type eaching having a detent notch intermediate their front and rear ends. A spring biased member is provided adjacent each of the receptacles and is engageable with its associated cartridge detent notch to d...

Improved apparatus for controlling tape speed in a reel-to-reel magnetic tape transport system. A controllable reel drive motor operates in response to a control signal derived from an accumulated count of reel revolutions so that the driven reel is driven at a varying angular velocity chosen to produce a substantially constant predetermined tape speed as the tape is wound. In order to more accurately maintain a constant tape speed an indication of tape speed error is obtained by measuring and c...

A multi-channel dual-gap magnetic head. The head has a plurality of magnetic head tips which are separated magnetically from each other by non-magnetic materials, and each having two magnetic gaps. A plurality of magnetic back cores are connected to said magnetic head tips, and a plurality of windings are wound on the respective back cores. The corresponding magnetic gaps in the head tips are aligned in two straight lines which are parallel to each other and perpendicular to the direction of tap...

In a random access storage device a head transported relative to a rotating assembly of flexible disks and a pair of co-rotating end plates operates in clearance spaces formed by sliding the disks apart at a selected interface. One of the end plates is attached to a low friction spline which is quickly shiftable between predetermined axial limit positions. In the most confining position of this plate a single selected interface space between the disks is partially opened by deflection of the dis...

A portable disc recorder control apparatus operable both upon insertion of a recording disc and manipulation of a single control button. After insertion and positioning of the disc, such functions and operations as special instruction recording, stopping, ejecting, playing, and reviewing are controlled by the apparatus. These functions and operations are initiated through the single control button.

A data recorder/reproducer device for flexible magnetic disc media, has a door-like structure mounted on a supportive frame. The door structure has a hollow interior which receives a recording disc, and is adapted to carry recording heads at each side of the disc. The heads may be articulated for selective controlled movement toward or away from the disc, into or out of transducing relation. The heads are also mounted for translational movement across the face of the disc, generally radially the...

A retention device for a cassette tape recorder comprises a cassette holder, a platform, a movable plate, a slide plate and a retention lever. The cassette holder is adapted to receive a tape cassette and is movable vertically so that the tape cassette may be engaged and disengaged with the tape drive means. The platform supports magnetic transducer heads and a pinch roller and is slidable so as to cause the heads and pinch roller to come into engagement with the magnetic tape in the cassette. T...

A magnetic recording and reproducing apparatus comprises a drive mechanism for running an endless magnetic tape of less than 300 m at a higher speed than 5 meters per second; a restricting member interlocking with the roll of said rapidly moving endless magnetic tape wound on a reel to apply a force against a centrifugal force generated on the tape roll so as to prevent it from being shaken unnecessarily; and a stationary magnetic head so arranged that the head is stational in a tape running dir...