Abstract: An improved belt system for direction sensitive machinery driven by three phase electric motors providing protection against inadvertent reversed rotation, and simplified belt servicing.

Abstract: An improved tool for installing and removing a hub on a shaft Two sequential assembly configurations of a first screw, a nut, a thrust bearing, and a cup accomplish installation. Two additional sequential assembly configurations of the first screw, the nut, two plates, clamping members, a second screw, a pin, and a ball accomplish tool alignment and hub removal.

Abstract: A magnetic disc drive including a carriage for transporting the magnetic transducers relative to the magnetic disc for reading/recording data thereon. The carriage is sandwiched between a chassis and a support assembly for movement in response to the rotation of a drive motor. A pair of adjusting levers are disposed for movement of the support assembly and along therewith the carriage to properly position the magnetic transducers both angularly and radially with respect to the magnetic disc.

Abstract: A floppy disc drive mechanism in which a lifter plate member operable by a handle manipulated by an operator replaces the floppy disc rotating mechanism into contact with the floppy disc. An interlock mechanism precludes engagement of the rotating guide mechanism or placement of the read/write heads into operating position unless a floppy disc is positioned in place within the drive mechanism.

Abstract: A spindle and rotor mechanism between which a floppy disc is clamped for rotation to read/write data thereon. The apparatus provides precision centering and gripping of the disc without permanent deformation thereof while maintaining concentricity. The spindle and rotor are each supported upon a spherical bearing each of which is aligned with the axis of rotation of the disc with the spindle bearing disposed in the plane of the floppy disc while it is being rotated.

Abstract: First and second transducer support arms positioned upon a carriage means for positioning a first and second transducer on opposite sides of a floppy disc. Adjusting means provided for linearly and transversely adjusting a transducer to properly position the two transducers with respect to the rotating magnetic floppy disc.

Abstract: A movable carriage carrying magnetic transducer head is positioned at predetermined points adjacent a floppy disc surface for appropriate reading/writing of data thereon. The transducers are positioned by a permanent magnet stepping motor which rotates a cam shaft. The cam surfaces on the shaft drive a plurality of balls into engagement with opposed racks defining "V"-shaped notches of different pitches formed on a surface of the carriage and on a fixed surface adjacent thereto. As the balls sequentially enter the "V"-shaped notches, they force individual pairs thereof into alignment, the carriage and thus the transducer means are sequentially and discretely positioned at predetermined data track positions on the floppy disc.

Abstract: Apparatus for incrementally positioning a magnetic transducer read/write head for recording data magnetically upon a single rotating magnetic recording media in the form of a disc wherein the read/write head is moved such that the read/write head gap travels along a locus which is parallel to but displaced from a radial disposed in an orthogonal plane extending from the axis of rotation of the disc.

Abstract: A pair of arms to be positioned one on each side of the flexible rotating magnetic disc. Each of the arms carries a magnetic transducer means which engages the surface of the magnetic disc for the purpose of reading and/or recording data on the rotating magnetic disc. Each of the magnetic transducer means is mounted upon the support arm by a pivotal support allowing limited rotation about a single axis. The axis is displaced only slightly from the magnetic read/write head. The axes of rotation for the two heads are preferably disposed orthogonally to each other. The rotational movement of the transducer means ability is provided by a pair of balls received within pockets provided in opposed relationships between the transducer mounting means and the support arm.

Abstract: A first member defines a plurality of depressions such as V-shaped notches therein and is positioned so that the V-shaped notches are adjacent another plurality of similar notches defined by a second member. The spacing of the recesses in the second member is different than the spacing of recesses in the first member. A movable ball is received in each of the recesses of the first member. A cam is positioned to alternately force one of the balls into engagement between partially aligned recesses on the first and second members forcing relative movement between the members, positioning a load connected thereto.